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 we run, 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: the AMS specs we deal with most often. Not exhaustive — the AMS catalog is thousands of entries deep. If your drawing cites a spec not listed here, talk to us; we maintain certified material with full chemical and mechanical traceability for AS9100 and AS9102 work.
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 | 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, plate | Precipitation hardened | Aged sheet/plate. |
| AMS 5664 | Inconel 718 | Forgings | Solution + age | Forging-specific 718. |
| 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 | RH950 / TH1050 | 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 | Normalized | Most-cited 4340 bar spec. Landing gear, shafts, fasteners. |
| AMS 6414 | 4340 | Bar, forgings | Normalized + tempered | Companion to 6415 for forgings. |
| 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
5 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 | 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 | Spinodal hardened (TS95) | High-strength spinodal copper-nickel-tin. Lead- and beryllium-free BeCu substitute for bushings, bearings, landing gear. |
| 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 / 5604 callouts above.
Pick an alloy by property, then find its AMS spec here.
Technically reviewed by the True Precision Machining engineering team · Last reviewed June 2026
Standards referenced: SAE AMS, ASTM B348, DFARS 252.225-7009, AS9100, AS9102
Drawing cites an AMS you don't see here?
Send the drawing — we maintain certified material with full chemical and mechanical traceability across all major AMS aerospace alloys, plus DFARS specialty-metals compliance for DOD work.
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