Quick answer: AMS 5525 is an SAE Aerospace Material Specification for corrosion- and heat-resistant A-286 sheet, strip and plate. A-286, UNS S66286, W.Nr. 1.4980 and AISI 660 identify the alloy family, but none of those identifiers alone defines product form, revision, dimensions, delivery condition, surface, inspection or certification. A complete RFQ must state those requirements separately.
Buyers searching for “AMS 5525 stainless steel,” “A286 sheet,” “A286 plate” or “Incoloy A286” are usually trying to connect a material name with a purchasable flat product. The useful distinction is simple: the grade identifies the material family, while AMS 5525 defines requirements for particular product forms and conditions. Start with the A-286 sheet, strip and plate product page, then use this guide to build an enquiry that can be checked against the correct document.
A-286 Identifiers: Same Alloy Family, Different Jobs
Several names can point to A-286, but they are not interchangeable with a complete material order. Use the identifier familiar to the drawing or market, then add the governing specification and measurable purchase requirements.
| Term | What it identifies | What it does not settle | Best RFQ use |
|---|---|---|---|
| A-286 | Common alloy name for an iron-nickel-chromium precipitation-hardenable grade | Product standard, revision, form, condition or acceptance tests | Use as the familiar grade name, supported by a recognized designation |
| UNS S66286 | Unified Numbering System designation for the alloy family | Sheet, strip or plate scope; tolerances; heat treatment; inspection | Use as a neutral grade identifier in international enquiries |
| W.Nr. 1.4980 | European material-number cross-reference associated with A-286 | A complete EN, AMS or customer acceptance route | Add when the drawing or ERP uses Werkstoff numbers |
| AISI 660 | Legacy/common designation frequently cross-referenced with A-286 | Current procurement document and product-form requirements | Treat as a cross-reference, not the full order description |
| AMS 5525 | An SAE Aerospace Material Specification for A-286 sheet, strip and plate | The drawing's revision choice, exact size, quantity and supplementary requirements | State the document number and required revision explicitly |
Is AMS 5525 Stainless Steel?
The current SAE title describes the material as corrosion- and heat-resistant steel sheet, strip and plate. In commercial use, A-286 may also be grouped with iron-nickel-base superalloys or high-temperature alloys because its nickel content and precipitation-hardening behavior distinguish it from ordinary austenitic stainless grades. These category labels help with searching, but they do not change the ordered grade or the governing specification.
For purchasing, avoid relying on the word “stainless” or “superalloy” alone. Write A-286 / UNS S66286 together with AMS 5525 and the required revision. That removes the category debate from the quotation and gives the supplier a document against which to review the material.
What AMS 5525 Covers
SAE lists AMS 5525L as covering A-286 sheet, strip and plate from 0.0010 inch (0.025 mm) nominal thickness and above, in the specified solution-heat-treated condition. This published scope is a useful eligibility check, but it does not replace the complete standard. The controlling revision, drawing and purchase order must still define dimensions, tolerances, properties and any additional acceptance requirements.
| Question | Safe purchasing interpretation | Action before quotation |
|---|---|---|
| Does the current title cover sheet? | Yes, sheet is named in the current title. | State thickness, width, length and applicable tolerances. |
| Does it cover strip? | Yes, strip is named in the current title. | Add coil or cut-strip format, edge and winding details. |
| Does it cover plate? | Yes. Plate is named in the current AMS 5525L title and published scope. | State thickness, width, length, tolerances and any drawing-specific tests. |
| Is the revision optional? | No. Revisions may change wording, requirements or referenced methods. | Use the revision approved by the drawing, customer or quality system. |
A-286 Chemistry: Reference Check, Not the Whole Specification
Published manufacturer data show the characteristic chemistry below. It is useful for alloy identification and certificate review, but the complete limits, analytical rules and permissible variations must come from the ordered specification.
| Element | Published reference range, wt.% | Review point |
|---|---|---|
| Nickel | 24.00–27.00 | Major alloying component; confirm certificate result against the ordered document. |
| Chromium | 13.50–16.00 | Part of the corrosion- and oxidation-resistance system. |
| Molybdenum | 1.00–1.50 | Controlled addition within the alloy balance. |
| Titanium | 1.90–2.30 | Important to precipitation-hardening response. |
| Vanadium | 0.10–0.50 | Minor controlled addition; check the full certificate. |
| Boron | 0.003–0.010 | Small range that still requires controlled analysis. |
| Iron | Balance | Why A-286 may be described as an iron-nickel-base alloy. |
Reference ranges are summarized from published manufacturer data for identification. The purchase order and material certificate must be evaluated against the governing specification and revision.
Solution Treated vs Aged: Write the Required Condition
A-286 is precipitation hardenable. “Solution treated” and “aged” therefore describe materially different processing states, not cosmetic finishes. The appropriate supply condition depends on the governing document and the fabrication sequence. If forming or welding occurs before final aging, responsibility for the final heat treatment must be clear.
| Condition topic | Meaning for the RFQ | Common error prevented |
|---|---|---|
| Solution treatment | State the specification-defined supply condition and any approved process route. | Treating a generic datasheet temperature as an order requirement. |
| Aging | Identify whether material is supplied aged or aging occurs after fabrication. | Assuming solution-treated stock already has final aged properties. |
| Property acceptance | Specify condition, test temperature, specimen orientation and report requirements. | Using typical values as guaranteed acceptance limits. |
| Fabrication sequence | State planned cutting, forming, welding and final heat treatment when relevant. | Ordering a condition unsuitable for the next manufacturing step. |
Dimensions, Surface and Inspection Details
A specification number does not choose the exact commercial configuration. Sheet enquiries need thickness, width and length. Strip enquiries may also need coil weight, inside diameter, outside-diameter limit, winding direction, edge and camber controls. Surface acceptance should be measurable: identify required cleanliness, permitted marks, roughness when critical, and protective interleaving or film when needed.
Inspection requests should connect a method and acceptance criterion to the required report. Typical items include heat/lot traceability, chemical analysis, heat-treatment condition, mechanical testing, hardness and dimensional inspection. Additional tests belong in the RFQ only when required by the governing document, drawing or end-use approval route.
When AMS 5525 Is Not the Only Document
An aerospace material specification can define the base material, yet a customer drawing or approved supplier system may add requirements for source approval, melting practice, special-process control, test frequency, traceability or record retention. Those additions should be identified before quotation. Writing only “AMS 5525 compliant” can leave both parties unaware of requirements that appear elsewhere in the technical package.
Set a clear order of precedence when several documents apply. If the drawing, purchase specification and AMS document conflict, the supplier should not guess which one controls. The RFQ should name the controlling drawing and revision, list applicable customer clauses and flag any deviation for written disposition. This is especially important when a requested dimension, tolerance or product form sits near a document's scope boundary.
Copy-Ready AMS 5525 A-286 RFQ Checklist
| RFQ field | Information to provide | Why it matters |
|---|---|---|
| Grade | A-286 / UNS S66286 and any drawing cross-reference | Prevents a category name from replacing grade identity. |
| Specification | AMS 5525 plus the project-approved revision | Establishes the applicable production and acceptance document. |
| Product form | Sheet, coiled strip, cut strip or plate | Keeps dimensional, edge and handling requirements aligned with the intended form. |
| Dimensions | Thickness, width, length or coil data, with tolerances | Allows size and processing feasibility to be reviewed. |
| Condition | Required supply condition and responsibility for final aging | Separates delivery condition from final component properties. |
| Edge and surface | Edge type, burr control, surface acceptance and protection | Reduces surprises during forming or receiving inspection. |
| Inspection | Tests, sampling, acceptance criteria and certificate format | Connects requested documents to defined requirements. |
| Commercial scope | Quantity, required date, destination, packing and quotation terms | Prevents technical and logistics scope from being separated. |
Conclusion
AMS 5525 and UNS S66286 answer different procurement questions. The UNS number identifies the A-286 alloy family; AMS 5525 supplies a product-specification route for sheet, strip and plate. A reliable enquiry combines both with the approved revision, exact product form, dimensions, condition, surface, inspection, certification and logistics requirements.
Prepare an A-286 Flat-Product Enquiry
Send the grade, specification and revision, product form, dimensions and tolerances, delivery condition, edge, surface, quantity, inspection and document requirements. SASA Alloy will review the requested scope against the specific enquiry.
Post time: Oct-23-2026