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A286 AMS / ASTM Specifications Hub
A286 AMS / ASTM Specifications Hub — comprehensive cross-reference to every standard governing A286 (UNS S66286). A286 is one of the most-specified precipitation-hardening superalloys in the aerospace and industrial standards corpus, covered by SAE / AMS aerospace specs, ASTM industrial specs, DIN European standards, and equivalent UNS / ASTM grade designations. This hub page links to every specification with detailed scope, chemistry, heat-treatment requirements, and form/size coverage. Use this page to identify the correct spec for your application — the specific spec drives heat-treatment + dimensional + inspection requirements that affect the finished part.
Spec Scope & Coverage
A286 (UNS S66286) is covered by 9 primary specifications: SAE / AMS family for aerospace bar / forging / sheet / plate / wire (AMS 5525, 5731, 5732, 5734, 5736, 5737, 5853, 5895), ASTM family for industrial bolting and forgings (A453 grade 660 with classes A/B/C/D, A638 grade 660 Type 1/2, B637), DIN European designation (1.4980 / X5NiCrTiMoVB25-15-2), and umbrella designations (UNS S66286, AISI 660, Iron Alloy 660, SAE J467). Each spec defines specific chemistry tolerance, heat-treatment cycle, mechanical property minima, and inspection scope — choose the spec by application and required property profile.
A286 AMS / ASTM Specifications Hub — Spec Requirements
| Specification | Form / scope | Heat treatment | Min. tensile (MPa) | Min. yield (MPa) | Hardness (HRC) |
|---|---|---|---|---|---|
| AMS 5525 | Sheet, strip & plate | Sol-treated | ≥ 670 | ≥ 380 | — |
| AMS 5731 | Bar / forging / tubing / rings | Sol 1800 °F + aged | ≥ 895 | ≥ 585 | 29-32 |
| AMS 5732 | Bar / forging / tubing | Sol 1650 °F + aged | ≥ 895 | ≥ 655 | 29-32 |
| AMS 5734 | Bar / forging — VIM-VAR | Sol 1800 °F | ≥ 670 (sol) | ≥ 380 (sol) | 24-28 |
| AMS 5735 | Bar / forging / tubing / rings | Sol + aged | ≥ 895 | ≥ 655 | 29-32 |
| AMS 5736 | Bar / forgings — alternate sol+aged | Alternate sol + aged | ≥ 895 | ≥ 605 | 29-32 |
| AMS 5737 | Bar — precision aged | Sol 1650 °F + aged precision | ≥ 895 | ≥ 655 | 29-32 |
| AMS 5853 | Welding wire / rod (TIG/MIG) | Sol-treated | Per filler | Per filler | — |
| AMS 5805 | Welding electrode (SMAW stick) | Sol-treated | Per filler | — | — |
| AMS 5726 | Bar / wire / forgings | Sol + aged | ≥ 850 | ≥ 580 | 24-32 |
| AMS 5895 | Sheet / strip — aged | Sol + aged | ≥ 895 | ≥ 655 | — |
| SAE J467 | Special Purpose Alloy designation | Per subsidiary | Per subsidiary | — | — |
| ASTM A453 gr 660 Cl. A | Bolting | Sol 1650 °F + aged | ≥ 895 | ≥ 655 | 29-37 |
| ASTM A453 gr 660 Cl. B | Bolting | Sol 1800 °F + aged | ≥ 895 | ≥ 585 | 24-37 |
| ASTM A638 gr 660 Type 1 | Forgings (high RT tensile) | Sol 1650 °F + aged | ≥ 895 | ≥ 655 | 29-32 |
| ASTM A638 gr 660 Type 2 | Forgings (high stress rupture) | Sol 1800 °F + aged | ≥ 895 | ≥ 585 | 24-30 |
| ASTM B637 | Precipitation-hardenable bar | Sol-treated / aged | Per condition | Per condition | Per condition |
| DIN 1.4980 | European designation | Per condition | Equivalent UNS S66286 | Equivalent UNS S66286 | — |
| UNS S66286 | Material identifier | — | Reference chemistry only | — | — |
When to Specify A286 AMS / ASTM Specifications Hub
- Aerospace bolt manufacture: AMS 5732 (bar/forging, sol+aged) for fastener manufacture; AMS 5737 for precision-aged bar; AMS 5731 for solution-treated raw stock when downstream aging.
- High-temperature bolting (industrial): ASTM A453 grade 660 Class A — the canonical industrial bolting spec. Class B for higher-stress-rupture variant.
- Pressure-vessel forgings (nuclear): ASTM A638 grade 660 Type 1 (high RT tensile) or Type 2 (high stress rupture). ASME Section III Subsection NB acceptance.
- Sheet / plate: AMS 5525 for aerospace sol-treated sheet; AMS 5895 for aged sheet/strip. ASTM A638 also covers some sheet applications.
- Welding filler: AMS 5853 (matching A286) for TIG/MIG welding rod and wire.
- European / DIN aerospace: DIN 1.4980 / X5NiCrTiMoVB25-15-2 — equivalent to UNS S66286 chemistry.
- Generic material identifier: UNS S66286 covers any form / condition. Specify the subsidiary spec for actual ordering.
A286 AMS / ASTM Specifications Hub — Frequently Asked Questions
How many specifications cover A286?
9 primary specifications: 7 SAE / AMS specs (5525, 5731, 5732, 5734, 5736, 5737, 5853, 5895), 3 ASTM specs (A453 grade 660, A638 grade 660, B637), DIN 1.4980, and the umbrella UNS S66286 designation. All reference the same UNS S66286 chemistry but differ in heat-treatment, form/size, and inspection requirements.
What's the most common A286 spec for aerospace?
AMS 5732 — bar / forging / tubing in sol-treated and precipitation-aged condition, ready for fastener and machined-component manufacture. AMS 5732 is cited on virtually every modern aerospace drawing. AMS 5737 is the precision-aged variant for cold-heading.
What's the most common A286 spec for industrial bolting?
ASTM A453 grade 660 Class A — the canonical industrial high-temperature bolting spec. Class A specifies sol 1650 °F + aged 1325 °F for higher room-temperature tensile and yield. Class B specifies sol 1800 °F + aged for higher stress-rupture resistance.
What's the difference between AMS 5731 and AMS 5732?
AMS 5731: sol-treated only — downstream user performs aging. AMS 5732: sol-treated AND precipitation-aged from the mill, ready for use without further heat-treatment. AMS 5732 is the most common mill-aged spec; AMS 5731 used when aging timing matters.
Which A286 spec for forgings?
ASTM A638 grade 660 Type 1 (high RT tensile) or Type 2 (high stress rupture). For aerospace forgings, AMS 5731 / 5732 are also acceptable. ASTM A638 is the canonical forgings spec for nuclear and pressure-bearing service.
Are all A286 specs equivalent?
Material chemistry is identical across all specs (UNS S66286). Specs differ in heat-treatment, form/size, mechanical property minima, and inspection requirements. Selection drives the property profile — choose by application + required performance.
Where can I find the actual AMS spec text?
AMS specifications are published by SAE International. Order at https://www.sae.org/standards/. ASTM specs at https://www.astm.org/. DIN at https://www.din.de/. TorqBolt manufactures to all of these but does not redistribute the spec text.
Can a single A286 lot meet multiple specs?
Yes — material with chemistry per UNS S66286 can be heat-treated to meet specific spec requirements (e.g., AMS 5732 OR ASTM A453 grade 660 Class A) and certified per multiple specs simultaneously. Typical mill cert lists all applicable specs the lot satisfies.
Do European drawings cite AMS or DIN?
European aerospace drawings (Airbus, Eurocopter, Snecma) typically cite both — DIN 1.4980 / X5NiCrTiMoVB25-15-2 for material designation + AMS 5732 for fabrication condition. Drawings since ~2010 increasingly use ISO designations harmonised with US AMS.
Related A286 Specifications & Reference
Other A286 specifications: AMS / ASTM hub · AMS 5525 · AMS 5731 · AMS 5732 · AMS 5737 · AMS 5853 · AMS 5895 · ASTM A453 grade 660 · ASTM A638 grade 660 · ASTM B637 · DIN 1.4980 · UNS S66286.
Canonical A286 reference: A286 chemical composition · A286 mechanical properties · A286 heat treatment · alloy comparisons (vs Inconel 718 · vs Waspaloy).
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