Engineering · Standards
AMS spec cross-reference.
The Aerospace Material Specifications (AMS) used in defense, aerospace, and space hardware — by alloy, form, and condition. The most-cited specs for the 24 alloys in this reference, with notes on what each spec actually controls and where it shows up on real drawings.
How to read this
Spec → alloy → condition → application.
AMS specs do three things at once: identify the alloy chemistry (e.g., Ti-6Al-4V), the product form (sheet, plate, bar, forging, casting), and the heat-treat condition (annealed, STA, H900, etc.). One alloy will appear under several AMS numbers depending on form and condition. The spec on the drawing is what governs material acceptance — substituting AMS 5662 for AMS 5663 isn’t allowed without engineering approval, even though both call out Inconel 718.
Below: commonly referenced AMS specifications. Not exhaustive — the AMS catalog is thousands of entries deep. If your drawing cites a spec not listed here, talk to us; confirm required material certification and traceability before ordering.
01
Titanium alloys
10 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 4940 | CP Ti Grade 1 | Sheet, strip, plate | Annealed | Lowest strength (25 ksi yield), highest formability. Medical implant trays, marine. |
| AMS 4902 | CP Ti Grade 2 | Sheet, strip, plate | Annealed | Most common CP titanium (40 ksi yield). Heat-exchanger plate, chemical processing. |
| AMS 4900 | CP Ti Grade 3 | Sheet, strip, plate | Annealed | Higher strength CP (55 ksi yield). Aerospace ducting, marine hardware. |
| AMS 4901 | CP Ti Grade 4 | Sheet, strip, plate | Annealed | Highest CP strength (70 ksi yield). Surgical instruments, fasteners. |
| AMS 4943 | Ti-3Al-2.5V | Tube (seamless) | Annealed | Grade 9. Hydraulic/instrument tubing; anneal flare-forms well (AMS 4944/4945 = higher-strength CWSR tube). |
| AMS 4911 | Ti-6Al-4V | Sheet, strip, plate | Annealed | The aerospace workhorse. Airframe, fasteners, ducts. |
| AMS 4928 | Ti-6Al-4V | Bar, wire, forgings | Annealed | Most-cited spec for 6Al-4V bar. Brackets, fittings, fasteners. |
| AMS 4930 | Ti-6Al-4V ELI (Grade 23) | Bar, billet | Annealed | Extra-low-interstitial. Medical implants, cryogenic. |
| AMS 4965 | Ti-6Al-4V | Bar | STA (solution-treated and aged) | Higher-strength condition. Landing gear, structural fittings. |
| AMS 4985 | Ti-6Al-4V | Castings | HIP+annealed | Investment-cast Ti for complex aerospace shapes. |
02
Nickel superalloys
10 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 5662 | Inconel 718 | Bar, forgings, rings | Solution annealed | Most-cited Inconel 718 spec for hot-section + structural aerospace. Soft, machinable condition; age to AMS 5663 for full strength. |
| AMS 5663 | Inconel 718 | Bar, forgings | Precipitation hardened | Companion to 5662 for fully aged condition. |
| AMS 5596 | Inconel 718 | Sheet, plate | Solution annealed | Sheet/plate companion to 5662. |
| AMS 5597 | Inconel 718 | Sheet, strip, plate | Solution heat treated (1950 °F) | Precipitation-hardenable — supplied unaged. Differs from AMS 5596 by the 1950 °F (vs 1775 °F) solution treatment. |
| AMS 5664 | Inconel 718 | Bar, forgings, rings | Solution heat treated (1950 °F) | Precipitation-hardenable — supplied unaged. Differs from AMS 5662 by the 1950 °F (vs 1775 °F) solution treatment, not by product form. |
| AMS 5666 | Inconel 625 | Bar, forgings | Annealed | Corrosion-resistant nickel-chromium alloy. Combustor parts, marine. |
| AMS 5599 | Inconel 625 | Sheet, plate | Annealed | Companion to 5666 for sheet/plate. |
| AMS 5536 | Hastelloy X | Sheet, plate | Annealed | High-temperature corrosion alloy. Combustor cans, gas-turbine hot section. |
| AMS 5750 | Hastelloy C-276 | Bar, forgings | Solution annealed | Best-in-class aqueous corrosion resistance. Chemical processing, exhaust. |
| AMS 5402 | Inconel 625 | Castings | As-cast / annealed | Investment-cast Inconel 625 for complex corrosion-resistant shapes. |
03
Stainless steel (PH + austenitic + martensitic)
11 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 5643 | 17-4PH | Bar, forgings | H900–H1150 | PH stainless workhorse. Specify condition (H900 hardest, H1150 softest). |
| AMS 5862 | 15-5PH | Sheet, strip, plate | H900 | 15-5PH (UNS S15500) — 17-4 variant with better transverse toughness. ~190 ksi UTS at H900. |
| AMS 5644 | 17-7PH | Bar, wire, forgings, rings | Solution heat treated (Condition A), precipitation-hardenable | Semi-austenitic PH stainless. Springs, fittings, high-fatigue fasteners. |
| AMS 5528 | 17-7PH | Sheet, strip, plate | Cond. A / TH1050 / RH950 | Sheet/strip 17-7 — springs, diaphragms. |
| AMS 5629 | PH 13-8Mo | Bar, forgings | Cond. A (age to H1000) | High-toughness PH stainless. Landing-gear struts, fittings, fasteners. |
| AMS 5648 | 316 | Bar, forgings | Annealed | Molybdenum-bearing austenitic — marine, surgical, pharma. |
| AMS 5639 | 304 | Bar | Annealed | Companion bar spec. |
| AMS 5510 | 321 | Sheet, plate | Annealed | Ti-stabilized austenitic — resists sensitization; exhaust, manifolds. |
| AMS 5653 | 316L | Bar, forgings | Annealed | Low-carbon 316 — weldable without sensitization. |
| AMS 5613 | 410 | Bar | Annealed | Martensitic stainless. Knives, valve trim, pump shafts. |
| AMS 5647 | 304L | Bar | Annealed | Low-carbon companion to AMS 5639 (304 bar) — weldable without sensitization. |
04
Alloy + tool steel
8 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 6415 | 4340 | Bar, forgings, mechanical tubing, forging stock | Normalized | Most-cited 4340 bar spec (air-melted). Landing gear, shafts, fasteners. |
| AMS 6414 | 4340 (VAR) | Bar, forgings, mechanical tubing, forging stock | Normalized | Vacuum consumable-electrode remelted (VAR / CEVM) counterpart of AMS 6415 — differs by melt practice, not product form. |
| AMS 6427 | 4330M (4330V mod) | Bar | Normalized + tempered | Low-alloy steel with high strength and toughness. Critical landing gear, fittings. |
| AMS 6532 | AerMet 100 | Bar | Annealed (vacuum melted) | Ultrahigh-strength Co-Ni steel (~280 ksi UTS). Landing gear, high-toughness structural. |
| AMS 6395 | 4140 | Sheet, strip, plate | Per spec (supplied annealed) | 4140 sheet/strip/plate. For bar, see AMS 6382 (annealed) or AMS 6349 (normalized). |
| AMS 6382 | 4140 | Bar | Annealed | Soft condition for ease of machining. |
| AMS 6408 | H13 | Bar | Annealed | Hot-work tool steel (5% Cr, Mo, V). Die-casting cores, forging dies. |
| AMS 6437 | H11 | Sheet / strip / plate | Annealed | Aircraft-grade hot-work tool steel (higher toughness than H13). Aerospace landing-gear arms, die-casting dies. Bar/forging form is AMS 6485/6487. |
05
Aluminum
6 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 4027 | 6061 | Sheet | T6 | Most-cited 6061-T6 sheet spec. General aerospace. |
| AMS 4117 | 6061 | Bar, rod | T6/T651 | 6061 bar and rod for structural machining. |
| AMS 4037 | 2024 | Sheet, plate | T3 | Classic aircraft skin alloy. Outstanding fatigue. |
| AMS 4045 | 7075 | Sheet | T6 | High-strength aerospace aluminum sheet. |
| AMS 4124 | 7075 | Bar, rod, wire (rolled/cold-finished) | T7351 | Solution heat treated, stress relieved by stretching, and overaged 7075 bar/rod. For T7351 plate, see AMS 4078. |
| AMS 4078 | 7075 | Plate | T7351 | Stress-relieved 7075 plate. Best stability for machined parts. |
06
Copper, brass, bronze
3 specs
| AMS spec | Alloy | Form | Condition | Notes |
|---|---|---|---|---|
| AMS 4533 | C17200 copper-beryllium (98Cu-1.9Be) | Bar, rod | TF00 (solution + precipitation heat treated) | High-strength age-hardening beryllium-copper (ASTM B196 class). |
| AMS 4596 | C72900 Cu-Ni-Sn (ToughMet 3) | Bar, rod | Solution annealed + spinodal hardened (TX00; TX02 in rev C) | High-strength spinodal copper-nickel-tin. Lead- and beryllium-free BeCu substitute for bushings, bearings, landing gear. Tube is AMS 4598. |
| AMS 4640 | C63000 nickel-aluminum bronze | Bar, rod, shapes | TQ50 / HR50 | High-strength nickel-aluminum bronze for bearings, valve stems, marine hardware. |
Beyond AMS
Other spec families that cross AMS callouts.
- ASTM
Same alloys, broader industries. ASTM B348 covers Ti-6Al-4V bar (ASTM equivalent of AMS 4928). Drawings often cite both.
- MIL specs (MIL-DTL, MIL-PRF, MIL-STD)
DOD-controlled documents that may invoke AMS as the underlying material spec. Common on weapon-system drawings.
- UNS numbers
Unified Numbering System. UNS S17400 = 17-4PH; UNS N07718 = Inconel 718. Drawings often list UNS alongside AMS.
- SAE J specs
SAE Aerospace AMS specs are SAE-managed. SAE-J-spec callouts for ground vehicles parallel AMS for aerospace.
- DFARS specialty metals
DFARS 252.225-7009 controls origin of titanium, nickel, and other specialty metals on DOD contracts. AMS-spec material that’s also DFARS-compliant carries a melted-and-poured statement of origin.
Keep exploring
Related tools & references
The ASTM and MIL-DTL/PRF/STD documents that cross-reference AMS callouts.
Chemistry, mechanical properties, and conditions for the alloys these specs control.
Translate the HRC/HBW values that condition callouts like H900 and STA target.
What annealed, STA, and precipitation-hardened conditions actually mean.
H900 through H1150 explained for the AMS 5643 callout above.
Pick an alloy by property, then find its AMS spec here.
Drawing cites an AMS you don't see here?
Tell us about your part and we'll get back to you promptly. Aerospace, medical, defense, and semiconductor production work welcome.Email CAD models and drawings to sales@digitalmachine.com, including ITAR, EAR, CUI and AS9100 work. Keep controlled technical data out of web forms.
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