Alloy Steels

Vacuum arc remelted 4340 for the cleanest structure available in a through-hardening aircraft-quality steel. Landing gear, shafting and high-load structure.

40NiCrMo8-4

AMS 6414 · AMS 6415 · AMS 6454 · AMS 6417 · UNS G43400

300M (4340 modified) is the benchmark ultra-high-strength landing gear steel, vacuum melted and stocked as bar and forging billet.

AMS 6257 · AMS 6419

NIT135 Mod, nitriding quality, vacuum melted. Supplied as bar and billet for gear, shaft and high-fatigue applications.

AMS 6472 · AMS 6470 · AMS 6471

Aermet 100 combines ultra-high strength with exceptional fracture toughness and stress corrosion resistance. Stocked in bar and billet for critical airframe hardware.

AMS 6478 · AMS 6532

M50 bearing steel, vacuum melted, for high temperature aircraft engine bearings and races. Also supplied as M50 NiL for case carburized bearing components.

AMS 6490 · AMS 6491

4320 carburizing grade for gears, pinions and bearing races where a hard case and tough core are required.

ASTM A322

4330M (4330 modified), vacuum melted, for heavy section forgings and high-strength structure with good toughness at section size.

AMS 6411 · AMS 6427

4620 carburizing steel for gears, shafts and pins, supplied in bar and billet.

AMS 6294

6150 chrome-vanadium spring and tooling steel with excellent fatigue strength, in bar, billet and wire.

51CrV4

AMS 6448 · AMS 6455 · AMS 6450

8740 chrome-nickel-moly steel, widely called out for fasteners, fittings and machined hardware in the heat treated condition.

AMS 6322 · AMS 6323 · AMS 6324 · AMS 6325 · AMS 6327

AMS 6512 · AMS 6520 · AMS 6501

AMS 6514 · AMS 6521

AMS 6515

X37CrMoV5-1

AMS 6437 · AMS 6485 · AMS 6487 · AMS 6488

AMS 6308

AMS 6439

AMS 6278 · AMS 6393

AMS 6440 · AMS 6444 · UNS G52986

AMS 6304

AMS 6300

25CrMo4

AMS 6356

42CrMo4

AMS 6349 · AMS 6379 · AMS 6381 · AMS 6382 · AMS 6395

ASTM A29

AMS 6280 · AMS 6530 · AMS 6535 · AMS 6550 · AMS 6281

14NiCrMo13-4

AMS 6265 · AMS 6260 · AMS 6267 · UNS G93106