Inconel 601 Strip and Coil: ASTM B168 and AMS5870 Procurement Guide

The distinction sounds small until material reaches a press line. A buyer asks for “Inconel 601 coil,” the quotation lists a thickness and width, and everyone assumes the requirement is clear. It is not. The material may qualify as strip or sheet depending on width. It may be inside or outside the thickness scope of the cited aerospace specification. Its edges may be mill, slit, sheared, or specially conditioned. Coil set, camber, burr, telescoping, inside diameter, and maximum coil weight can determine whether the material runs properly even when chemistry and tensile results are correct.

DAXUN manufactures Alloy 601 sheet, strip, and plate and supplies strip or sheet in coil or cut-length form according to the confirmed order. We also perform the specified cutting, slitting, edge preparation, heat treatment, surface finishing, dimensional inspection, testing, identification, and controlled packaging within our production system. Exact dimensions, coil build, tolerances, testing options, and delivery conditions remain subject to written technical and commercial confirmation.

This guide is written for engineers, technical buyers, stampers, furnace-component manufacturers, and distributors who need to convert a material name into an order that can actually be produced and inspected.

What Is Inconel 601 Strip?

Inconel 601 is a nickel-chromium-iron alloy with an intentional aluminum addition, while strip describes a specific flat-product geometry rather than a generic thin sheet. The standardized alloy designation is UNS N06601. “Inconel” is a registered trademark; Alloy 601 and nickel alloy N06601 are also commonly used procurement descriptions.

The alloy is not precipitation hardened. Its value at elevated temperature comes from its composition, stable austenitic structure, controlled heat-treated condition, and protective surface-scale behavior. Chromium supports resistance to oxidation and a range of corrosive environments. Aluminum promotes a tightly adherent oxide scale, which is particularly valuable when components experience repeated heating and cooling. Nickel supports metallurgical stability and resistance in several carburizing conditions.^[4][5]

That combination makes thin Alloy 601 useful for furnace baffles, shields, liners, burner parts, flexible hot-gas components, formed combustion hardware, trays, baskets, retainers, clips, and fabricated thermal-processing equipment. It does not make the alloy universally suitable for every hot atmosphere. Sulfur, molten salts, halides, ash deposits, reducing conditions, thermal gradients, load, and exposure time can change performance materially. Alloy selection must follow the actual atmosphere and component duty, not a temperature headline from a data sheet.

Reference composition of UNS N06601

The following producer-published limits describe the Alloy 601 material family. Contract acceptance must follow the complete chemistry requirements in the standard and edition stated on the purchase order.

Elemento	Reference composition, mass %
Nickel	58.0-63.0
Chromium	21.0-25.0
Ferro	Resto
Alumínio	1.0-1.7
Carbono	0.10 max.
Manganese	1.0 max.
Silicon	0.50 max.
Copper	1.0 max.
Sulfur	0.015 max.

Producer sheets may show additional controlled elements or slightly different reporting conventions. Values from separate data sheets should not be combined into an unofficial chemistry table. The heat analysis and any required product analysis must be evaluated under the ordered material specification.^[4][5]

Are Strip, Sheet, Plate, Coil, and Foil Interchangeable Terms?

No. ASTM product-form definitions are based on thickness, width, and processing, while coil describes how sheet or strip is delivered. “Foil” is a commercial description unless a governing specification defines it. Using the terms casually can lead to an incorrect standard, wrong tolerances, or a certificate that does not match the drawing.

ASTM B906-22 supplies general definitions and requirements for the nickel-alloy plate, sheet, and strip specifications listed in its scope, including ASTM B168. The practical boundaries are summarized below.^[2]

Term	ASTM B906 product-form boundary	Procurement consequence
Prato	Flat material at least 3/16 in. (4.76 mm) thick and over 10 in. (250 mm) wide	Plate tolerances and processing apply; calling it heavy-gauge sheet does not change the contractual form.
Folha	Flat material under 3/16 in. thick and at least 24 in. (600 mm) wide	May be supplied in coils or cut lengths when the order permits.
Strip	Cold-rolled flat material under 3/16 in. thick and under 24 in. wide	Width, edge condition, camber, and coil behavior are often central to downstream processing.
Coil	A wound delivery configuration for sheet or strip	The underlying product remains sheet or strip; coil ID, OD, weight, winding and packaging must be added.
Foil	Not a separately named B168 or AMS5870G product form	Very thin material requires an explicitly agreed specification, thickness range, tolerances, properties, sampling, and certification basis.

These definitions answer an important question: a 500 mm wide cold-rolled product below 4.76 mm is strip, while an otherwise similar 700 mm wide product is sheet under the ASTM general definitions. Both may arrive as coils. A certificate should not identify the material only as “coil,” because coil alone does not establish which product requirements apply.

Commercial catalogues often use “Inconel 601 foil” for very thin strip. That phrase may be useful in a search or preliminary inquiry, but it does not create a foil category in ASTM B168-26 or AMS5870G. If the requested gauge is below the lower thickness limit of the selected specification, the parties need another technically valid contractual route rather than forcing the material into an inapplicable standard.

Which Standards Apply to Alloy 601 Strip and Coil?

ASTM B168-26 is the principal current ASTM product specification for UNS N06601 plate, sheet, and strip; ASTM B906-22 supplies applicable general requirements. AMS5870G is a separate aerospace procurement route for solution-heat-treated Alloy 601 sheet, strip, and plate. The buyer must choose a route based on the project, not list every familiar standard on the same line.^[1][2][3]

Requirement	Correct role	Important boundary
ASTM B168-26	Alloy-specific ASTM specification covering listed nickel-alloy plate, sheet, and strip, including UNS N06601	The order must still define product form, dimensions, condition, finish, tests, and supplementary requirements.
ASTM B906-22	General requirements used with the alloy-specific specifications in its scope	B906 does not independently certify Alloy 601 and should not replace B168 on the purchase order.
AMS5870G	SAE aerospace material specification for solution-heat-treated Alloy 601 sheet, strip, and plate from 0.010 to 2.000 in. (0.25-50.80 mm) nominal thickness	Material below 0.25 mm cannot be certified to AMS5870G merely because a seller calls it foil. Project and purchaser requirements still apply.

ASTM B168-26 replaced ASTM B168-19e1 as the active ASTM edition in August 2026.^[1] An approved drawing, legacy project specification, or aerospace quality system may still invoke a previous edition. The solution is not to write “latest edition” and leave the decision to the supplier. State the exact approved edition on the purchase order and resolve any conflict before manufacturing begins.

AMS5870G was revised in March 2024 and defines a solution-heat-treated aerospace route.^[3] It should not be added to an ASTM order as decorative extra wording. Dual certification is possible only when the actual heat, product form, dimensions, condition, testing, sampling, records, and quality-system controls satisfy both routes. Similar chemistry does not establish dual compliance.

Why the words after the standard matter

“UNS N06601 to ASTM B168-26” is a good beginning, but it is not a complete manufacturing instruction. It leaves open whether the order is sheet, strip, or plate; whether the material is coiled or cut; which surface and edges are required; and which dimensional limits control. Those omissions are where technically correct material becomes commercially unusable.

A more useful order line reads along these lines:

> UNS N06601 cold-rolled strip, ASTM B168-26 with ASTM B906-22, ordered condition and finish as specified, 0.80 mm x 180 mm, slit edges with agreed burr limit, supplied in coils with stated inside diameter and maximum coil weight, with chemistry, tensile results, dimensional report, surface acceptance, and full heat/lot traceability.

That example is not a universal template. It shows the level of definition needed before DAXUN can confirm a production route and inspection plan.

What Mechanical and Physical Properties Are Useful for Preliminary Design?

Producer data are useful for screening Alloy 601 and planning forming operations, but they are not universal acceptance values for every ASTM or AMS coil. Product thickness, heat treatment, cold work, test orientation, sampling location, and specification can all affect the reported result.

Special Metals publishes broad composite room-temperature ranges for cold-rolled annealed Alloy 601 sheet and strip. VDM publishes separate minimum reference values for solution-annealed strip. The two sets should not be merged because they reflect different reporting bases.^[4][5]

Imóveis	Special Metals cold-rolled annealed sheet/strip reference	VDM solution-annealed strip reference	Contract rule
Resistência à tração	Approximately 585-690 MPa	550 MPa minimum	Use the ordered specification, thickness, condition, and test orientation.
0.2% yield strength	Approximately 205-345 MPa	205 MPa minimum	Do not treat a producer range as a universal minimum or maximum.
Alongamento	Approximately 35-55%	30% minimum	Gauge length, orientation, thickness, and condition must match the applicable requirement.
Dureza	Not a single universal contractual value in the composite table	220 HB maximum	Include hardness only when the specification or purchase order requires it.

Typical physical properties published by producers include density around 8.05-8.11 g/cm3 and room-temperature thermal conductivity around 11 W/m.K.^[4][5] These values help with weight estimates and thermal modeling. They normally are not heat-lot acceptance tests. Thermal conductivity, modulus, expansion, and strength also change with temperature, so room-temperature values should not be carried directly into a hot-component calculation.

At elevated temperature, design must address more than tensile strength. Thin formed parts may fail by creep distortion, buckling, thermal fatigue, restraint at fasteners, or progressive section loss. The governing design basis should consider temperature distribution, dwell time, cycling frequency, load, geometry, atmosphere, welds, and the consequence of distortion.

Why Choose Strip Instead of Sheet or Plate?

Strip is the natural product form when a manufacturer needs a controlled narrow width for continuous feeding, progressive forming, stamping, roll forming, seam welding, or repeatable blanking. The commercial advantage comes from reducing conversion steps and stabilizing the input to the downstream process, not from a different alloy chemistry.

Strip supplied in coil form can reduce handling between operations. A controlled slit width may improve material utilization for clips, rings, shields, narrow shells, corrugated sections, spacers, and repeated furnace components. Coil feeding can also support consistent orientation and automated production.

Those benefits disappear if the coil specification ignores downstream equipment. A press line may need a particular inside diameter, maximum outside diameter, coil weight, winding direction, edge burr direction, or strip flatness. A laser or stamping operation may care more about surface defects and camber than a purchaser who plans to cut individual blanks. A roll former may be sensitive to coil set and local thickness variation.

Plate remains appropriate for thick load-bearing parts, machined bases, heavy furnace structures, and components whose geometry is cut from individual flat pieces. Sheet is often more practical for wide panels, large liners, duct sections, and broad shields. The correct choice follows part geometry and manufacturing flow.

Which Coil Details Must Be Agreed Before Production?

A usable Alloy 601 coil order controls the geometry of the wound package as well as the metallurgical product. The coil cannot be treated as packaging added after strip inspection.

Coil variable	Why it matters	What to state
Inside diameter (ID)	Determines whether the coil fits the uncoiler and affects bending severity near the core	Nominal ID and permitted tolerance
Maximum outside diameter (OD)	Controls press-line and transport clearances	Maximum acceptable OD
Coil weight	Affects lifting, mandrel capacity, line change frequency, and freight	Target and maximum weight; minimum if operationally necessary
Winding direction	Influences feed setup and which face is presented to tooling	Face-out/face-in or drawing-defined orientation when required
Oscillate or ribbon winding	Changes package width, handling, and feed method	Required winding method and traversing limits
Telescoping	Excessive lateral displacement can damage edges and obstruct loading	Maximum permitted telescoping or agreed visual standard
Coil set	Residual curvature can affect feeding, cutting, and formed-part geometry	Test method and acceptance value when critical
Interleaving	Can protect surfaces but may introduce fibers, residues, or handling complexity	Material, cleanliness, and whether interleaving is permitted
Splices or welds	May interrupt automated production and create reject parts	Whether permitted, marking method, maximum number, and disposition

There is no sensible universal value for these items. A small coil for a precision stamper and a broad master coil for a service center have different handling limits. Producer delivery programs likewise separate strip dimensions and delivery forms rather than defining one universal coil package.^[6] DAXUN confirms the achievable coil build against thickness, width, ordered condition, surface, edge, quantity, packaging, and transport requirements.

How Should Surface and Edge Condition Be Specified?

Surface and edges should be defined by downstream function, because a compliant chemistry and tensile test do not prevent scratches, embedded contamination, edge cracks, or burrs from disrupting fabrication. Vague descriptions such as “smooth finish” or “standard edge” are rarely adequate for precision strip.

Possible surface descriptions include hot-rolled and descaled, cold-rolled and annealed, pickled, mechanically finished, or a customer-approved reference surface. A buyer should not assume that conventional bright annealing is a routine Alloy 601 finish: chromium- and aluminum-rich surface oxides can be difficult to remove, and the atmosphere, thermal cycle, descaling route, final appearance, roughness, and cleanliness acceptance must be qualified for the ordered gauge and end use.^[4] A bright appearance alone does not prove oxide-free metal, low roughness, cleanliness for a special process, or absence of a chemically altered layer.

For exposed furnace components, superficial marks may be acceptable if they do not exceed the agreed defect limit or reduce section below minimum thickness. For welded bellows-like parts, formed seals, or thin shields, a scratch can act as a local strain concentrator. For stamping, surface pickup can transfer to tooling and reproduce across many parts. The purchase order should therefore connect appearance requirements to a measurable or reference-based acceptance method.

Edge options commonly include mill edge, slit edge, sheared edge, or a specially conditioned edge. A slit edge has a characteristic rollover, burnished zone, fracture zone, and burr. Burr height and direction can influence feeding, part orientation, handling safety, welding, and fatigue performance. If the edge will be stretched during forming, the buyer should specify the critical edge and consider an edge-quality or forming trial rather than relying only on nominal width.

Camber is the lateral deviation of a strip edge over a stated length. Even modest camber can pull narrow material away from guides during progressive stamping or roll forming. Width tolerance alone does not control this behavior. When feed stability matters, the inquiry should define camber measurement length, acceptance limit, and whether both edges are evaluated.

How Does Alloy 601 Behave During Forming and Fabrication?

Alloy 601 can be formed using established nickel-alloy practices, but it work-hardens more rapidly than Alloy 600 and requires realistic tooling, reduction, lubrication, and annealing plans. A room-temperature elongation value does not by itself predict whether a particular part can be made in one operation.^[4]

Cold forming raises strength and reduces remaining ductility locally. Tight radii, repeated reverse bending, poor edge quality, or severe drawing can therefore promote tearing, springback, dimensional variation, or residual stress. The chain is straightforward:

1. Greater deformation increases work hardening.
2. Higher local strength raises forming load and springback.
3. Reduced local ductility makes edge and surface defects more significant.
4. Additional forming without recovery can produce cracking or unacceptable shape.
5. Tooling changes, staged forming, larger radii, or intermediate annealing may be required.

The forming route should be qualified on material that represents the ordered thickness, condition, grain structure, surface, and edge. A successful trial on thicker annealed sheet does not automatically qualify a thin slit coil. Conversely, conservative handbook guidance should not be used to reject a geometry that can be demonstrated with controlled tooling and an approved process trial.

Cutting and slitting

Mechanical slitting is efficient for repeat widths, but knife clearance, overlap, sharpness, strip tension, and material condition influence edge shape. Laser, waterjet, machining, and shearing may be more suitable for blanks or complex profiles. Thermal cutting introduces a heat-affected surface and oxide that may require removal before forming or welding.

The drawing should state whether nominal width is measured before or after edge conditioning. It should also identify whether burr is acceptable, must face a particular direction, or must be removed. “Deburred” needs a measurable endpoint when edge radius or width loss matters.

Soldadura

Alloy 601 is weldable by established nickel-alloy procedures, but an approved welding procedure remains essential. Joint cleanliness, filler selection, heat input, fit-up, shielding, interpass practice, and inspection must follow the governing fabrication standard and project requirements. A B168 or AMS5870 material certificate applies to the delivered flat product. It does not qualify the welding procedure or certify the finished assembly.

Thin strip is particularly sensitive to heat input and restraint. Excessive heat can cause distortion, burn-through, excessive reinforcement, or local oxidation. A weld that looks continuous may still have unacceptable penetration, undercut, contamination, or dimensional effect. Procedure qualification and representative production trials are stronger controls than visual appearance alone.

Heat treatment after forming

AMS5870G is a solution-heat-treated material specification, but that does not mean a heavily cold-formed finished part remains in the same certified condition. Subsequent annealing can restore ductility and reduce residual stress, while also changing grain structure, oxide condition, dimensions, and mechanical properties. The component drawing should state whether post-form heat treatment is required and how the final condition will be verified.

Where Is Alloy 601 Strip Commonly Considered?

Alloy 601 strip is most compelling where a thin, formable nickel-alloy component must retain shape and resist oxidation through repeated high-temperature exposure. The following are application families, not unconditional approvals.

Furnace liners, baffles, and shields

Thin sheet or strip can be formed into internal shields, baffles, retainers, and liners that direct hot gas or protect structural elements. Alloy 601’s adherent oxide scale is useful in cyclic oxidizing service. Material thickness and attachment design still need to accommodate thermal expansion, local vibration, hot spots, and creep. Overly rigid fastening can turn thermal growth into buckling or tearing.

Heat-treatment baskets, trays, and fixtures

Alloy 601 is used for wrought and welded furnace hardware, including elements fabricated from strip, sheet, rod, and wire. The alloy can be attractive in oxidizing, carburizing, carbonitriding, and nitriding equipment when the actual atmosphere is compatible.^[4][5] The best fixture material nevertheless depends on load, section size, furnace temperature, quench route, cycle count, allowable distortion, repair strategy, and fixture mass. A higher-strength alloy may permit a lighter design; a cast heat-resistant alloy may suit a different geometry. Alloy 601 should be evaluated, not automatically selected.

Combustion and hot-gas components

Formed strip may be used in burner sleeves, flame-related hardware, hot-gas seals, flexible connectors, ducting details, and combustion-chamber parts. These components often see steep thermal gradients. Local metal temperature may differ markedly from furnace setpoint or gas temperature. Oxidation resistance cannot compensate for an under-designed section that creeps or thermally fatigues.

Thermal-processing and petrochemical equipment

Alloy 601 is considered for selected catalyst-support parts, process heaters, thermal oxidizers, atmosphere generators, and high-temperature process internals. Service containing sulfur compounds, halides, molten salts, or deposits requires specific corrosion review. A general statement that the alloy is “heat resistant” is not enough.

Aerospace and engine-related fabricated parts

AMS5870G supports procurement of solution-heat-treated Alloy 601 flat products for aerospace uses within its dimensional scope.^[3] The material specification is only one part of compliance. Finished parts may also require approved sources, special-process control, traceability through cutting and forming, inspection records, first-article requirements, and customer release. An AMS material certificate does not by itself approve the finished part for flight.

When Should Buyers Consider Another Alloy?

Alloy 601 is not automatically the best choice when the dominant problem is aqueous corrosion, sulfur attack, creep strength, or minimum fixture weight. Material comparison should focus on the active failure mechanism.

Candidate	Reason it may enter the comparison	Limitation of a simple comparison
Alloy 600	Broad fabrication history and useful resistance in many thermal and chemical environments	Lower aluminum content changes scale behavior; service-specific oxidation and carburization data are needed.
Alloy 625	Strong aqueous corrosion resistance and useful strength	It is not a direct substitute for 601 in every furnace atmosphere or at every temperature.
Alloy 800H/800HT	Established high-temperature design use in specified conditions	Product specification, heat treatment, grain structure, design code, and environment differ.
RA330 or heat-resistant stainless grades	Common furnace-fabrication options with different cost and atmosphere behavior	Oxidation, carburization, creep, welding, and thermal cycling must be compared at the component level.
HAYNES 230 or other high-strength furnace alloys	Higher hot strength may allow lighter fixtures in some cyclic applications	Material cost, fabrication, weld procedure, availability, and approved design must be considered.

The comparison is not settled by maximum-temperature tables. A furnace basket carrying a heavy load through quench cycles has a different governing mechanism from a lightly loaded oxidizing shield. Likewise, a thin hot-gas seal may be controlled by thermal fatigue and edge quality rather than long-term creep.

What Are the Most Common Procurement and Service Failures?

Most avoidable failures begin with an incomplete definition of product form, condition, coil geometry, atmosphere, or downstream processing. The defect may not become visible until stamping, welding, installation, or the first thermal cycles.

The certificate says coil but not strip or sheet

This creates uncertainty about dimensional rules and the applicable product form. Correct it by identifying ASTM strip or sheet on the order and certificate, with coil noted as delivery configuration.

AMS5870 is requested below its thickness scope

Calling very thin material “foil” does not extend AMS5870G below 0.010 in. (0.25 mm). The result can be a specification that no compliant producer can honestly certify. Establish another approved material route and acceptance plan before ordering.

The coil fits the chemistry but not the press

Wrong ID, excessive OD, overweight coils, telescoping, coil set, or the wrong winding direction can stop production. These are preventable when coil-handling limits are part of the RFQ and inspection record.

Edge burr or camber disrupts forming

A narrow coil can meet average width yet wander through tooling or tear from a poor edge. Specify camber basis, burr limit and direction, edge condition, and any representative forming trial.

Forming changes the certified condition

The incoming MTC proves the delivered material condition. Severe cold work, welding, or post-form heat treatment changes the part. Final component requirements may need hardness, tensile coupons, dimensional inspection, metallography, weld NDE, or another agreed verification route.

A high temperature rating replaces engineering

Oxidation resistance in laboratory air is mistaken for a continuous pressure, creep, or service-life rating. Prevent this by separating corrosion behavior from allowable stress, thermal fatigue, geometry, load, and code compliance.

Surface appearance is treated as cleanliness certification

A bright coil can still carry oil, particles, residues, or embedded contamination. If cleanliness affects brazing, welding, vacuum service, coating, or product purity, define the cleaning process, prohibited substances, inspection method, packaging, and acceptance criteria.

How Should Alloy 601 Strip Be Inspected and Documented?

Inspection should be matched to the risk created by product form and final use. Adding every available test increases cost without necessarily improving control; omitting the test connected to the likely failure mode is worse.

Verification item	What it establishes	When to add detail
Mill test certificate (MTC)	Heat identity, chemistry, specification, condition, and required test results	State certificate type, edition, lot linkage, and any purchaser review requirement.
Positive material identification (PMI)	Alloy identity at the tested location	Useful for segregation control; it does not replace full chemistry or specification testing.
Tensile testing	Strength and elongation for the sampled product and orientation	Define frequency, orientation, specimen basis, and acceptance standard.
Dureza	Condition consistency or supplementary control	Use only with an agreed method, location, frequency, and limit.
Dimensional inspection	Thickness, width, length, and coil geometry	Add ID, OD, weight, camber, coil set, telescoping, and burr when relevant.
Surface inspection	Visible defects against an agreed acceptance basis	State lighting, reference sample, defect depth rules, and disposition of local grinding if permitted.
Edge inspection	Slit quality, cracks, burr, and edge condition	Critical for stamping, tight forming, welding, and personnel handling.
Grain-size or metallographic examination	Microstructural condition when invoked	Define method, sampling, and acceptance criteria; do not assume it is automatic.
Nondestructive examination	Detects specified discontinuities under the selected method	Method, calibration, coverage, sensitivity, and acceptance need written agreement.
Independent or witnessed inspection	Adds purchaser or third-party oversight	Identify hold points, inspector scope, records, and release authority before production.

Traceability needs to survive conversion. When a master coil is slit into multiple narrow coils, each finished coil should retain a controlled link to the parent heat and production lot. If coils are cut into sheets, blanks, or formed parts, the marking and traveler system should preserve identity at the level required by the project. A copied certificate without a documented lot link is not traceability.

How DAXUN Manufactures Alloy 601 Strip and Coil Orders

DAXUN manufactures UNS N06601 flat products and converts the confirmed material into strip, sheet, plate, coils, or cut lengths under a defined production and inspection route. Our role is not limited to trading a generic coil. The quotation is built around the product that must reach the customer’s line in a usable and traceable condition.

A typical order review includes:

1. Confirming UNS N06601 and the exact ASTM B168-26/B906-22 or AMS5870G route.
2. Classifying the order correctly as strip, sheet, or plate before defining coil or cut-length delivery.
3. Reviewing thickness, width, quantity, condition, finish, edges, tolerances, and downstream process.
4. Establishing slitting, cutting, edge preparation, heat treatment, cleaning, and surface requirements.
5. Defining coil ID, OD, weight, winding, splices, telescoping, coil set, and packaging where applicable.
6. Performing the agreed dimensional, surface, mechanical, chemical, and supplementary inspections within the confirmed scope.
7. Maintaining production-batch and heat traceability through conversion and final identification.
8. Supplying the agreed MTC, inspection records, packing list, markings, and export documentation.

Customer or independent third-party witnessing can be included when stated before production. It serves as an additional verification route and does not replace DAXUN’s responsibility for manufacturing and documenting the ordered product.

Packaging is selected to protect the actual form. Narrow coils may need secure eye orientation, edge protection, moisture control, separators, and restraints that prevent telescoping during transport. Cut lengths may need flat support and surface protection. Packaging materials must also be compatible with any cleanliness or residue restriction stated by the purchaser.

What Should Be Included in an Alloy 601 Strip RFQ?

A strong RFQ describes the material, the coil, the downstream process, and the acceptance evidence. Send the following information so the manufacturing route can be reviewed without guessing:

RFQ field	Information to provide
Material	Inconel 601 / Alloy 601 / UNS N06601
Especificação	ASTM B168-26 with ASTM B906-22, AMS5870G, or another approved route; state exact edition
Product form	Strip, sheet, or plate; state whether supplied as coil or cut lengths
Dimensões	Thickness, width, length if cut, and quantity, with required tolerances
Estado	Solution heat treated, annealed, cold-worked condition if permitted, or drawing-defined condition
Superfície	Required finish, roughness if controlled, defect acceptance, cleanliness, and protected face
Edges	Mill, slit, sheared, conditioned; burr, edge radius, and burr direction where critical
Coil geometry	ID, maximum OD, target and maximum weight, winding direction, telescoping, and coil set
Fabrication	Stamping, drawing, roll forming, welding, cutting, brazing, or other downstream process
Service	Operating and upset temperature, atmosphere chemistry, deposits, cycle, load, and expected life
Inspection	Chemistry, tensile, hardness, grain size, PMI, dimensional report, surface/edge inspection, NDE, witness points
Documentation	MTC type, lot traceability, inspection reports, marking, packing list, and project-specific forms
Delivery	Packaging restrictions, destination, shipment method, required date, and any handling limits

When a drawing controls the order, send it with the RFQ and identify which dimensions and notes are acceptance characteristics. If a press or uncoiler creates special limits, include its coil-handling envelope. That information is more useful than asking for a “standard coil,” because there is no single standard package suitable for every production line.

Perguntas mais frequentes

Is Inconel 601 coil the same product as Inconel 601 strip?

Not exactly. Strip is an ASTM product form defined by thickness, width, and cold-rolled processing. Coil describes a wound delivery configuration. Alloy 601 strip may be supplied in a coil, and qualifying sheet may also be supplied in a coil. The purchase order should identify both the product form and delivery configuration.

What is the current ASTM standard for Inconel 601 strip?

ASTM B168-26 is the active alloy-specific standard for the listed nickel-alloy plate, sheet, and strip products, including UNS N06601. ASTM B906-22 supplies applicable general requirements. The purchase order should state both editions where B906 applies.^[1][2]

Does ASTM B906 certify Alloy 601?

No. ASTM B906 provides general requirements for the product specifications listed in its scope. ASTM B168-26 is the alloy-specific flat-product route. An order stating only B906 does not completely specify Alloy 601 strip.

Can Inconel 601 foil be certified to AMS5870G?

Only if the material is within the AMS5870G product and thickness scope and meets all other requirements. AMS5870G begins at 0.010 in. (0.25 mm) nominal thickness. Commercially described foil below that limit is not AMS5870G material merely because its chemistry is Alloy 601.^[3]

Is AMS5870G better than ASTM B168-26?

Neither is universally better. They are different procurement routes. AMS5870G is a solution-heat-treated aerospace material specification with its own scope and controls. ASTM B168-26 is a broad ASTM flat-product specification. Use the standard approved by the drawing, customer, design authority, and quality system.

Can Alloy 601 strip be stamped and deep drawn?

Yes, Alloy 601 can be cold formed using suitable nickel-alloy practices. It work-hardens more rapidly than Alloy 600, so reduction, tooling, edge quality, lubrication, forming sequence, springback, and possible intermediate annealing need review. Representative trials are appropriate for demanding geometries.^[4]

Does an Alloy 601 MTC certify the finished stamped part?

No. The MTC certifies the delivered material under the stated specification and test scope. Cutting, severe forming, welding, brazing, or heat treatment may change properties, dimensions, surface, and traceability. Finished-part acceptance requires the drawing, process controls, and verification plan specified by the customer.

What coil information does DAXUN need?

At minimum, provide strip or sheet classification, thickness, width, tolerance, coil ID, maximum OD, target and maximum weight, winding direction, edge condition, burr requirements, surface, condition, quantity, packaging, and downstream process. State limits for camber, coil set, telescoping, and splices when they affect production.

Is Alloy 601 suitable for continuous service at 1,200°C?

No universal continuous-service approval can be made from the alloy name. Producer oxidation data explain why Alloy 601 is used at high temperature, but allowable stress, creep, geometry, atmosphere, thermal cycling, pressure, deposits, and design code determine whether a component is suitable. The responsible engineering authority must approve the service conditions.^[4][5]

Related DAXUN Technical Pages

• Review Inconel 601 sheet and plate when the part requires wide flat product or thicker load-bearing sections.
• Review Inconel 601 tube and pipe for seamless and welded tubular product routes.
• Compare Inconel 600 and Inconel 601 when aluminum-supported oxidation behavior and broader fabrication considerations affect alloy selection.
• For a manufacturable quotation, send the drawing and order details through the DAXUN contact page.

Technical Accuracy Statement

This page distinguishes ASTM and AMS product specifications from producer reference data, component design approval, and finished-part certification. Standards, producer publications, and website status were reviewed on August 17, 2026. Standards can be revised, withdrawn, or adopted differently by customers and construction codes. The purchase order, approved drawing, applicable code, project specification, and final Mill Test Certificate govern the delivered product. Specific DAXUN dimensions, tolerances, condition, inspection, coil build, packaging, and delivery remain subject to written technical and commercial confirmation.

Last reviewed: August 17, 2026.

Technical Sources

1. ASTM International, ASTM B168-26, Standard Specification for Nickel-Chromium-Aluminum Alloys (UNS N06699), Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617), and Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674) Plate, Sheet, and Strip
2. ASTM International, ASTM B906-22, Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
3. SAE International, AMS5870G, Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate, 60.5Ni-23Cr-14Fe-0.35Ti-1.4Al, Alloy 601, Solution Heat Treated
4. Special Metals Corporation, INCONEL Alloy 601 Technical Bulletin
5. VDM Metals, VDM Alloy 601 Data Sheet
6. VDM Metals, Strip Delivery Forms and Dimensions