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Aircraft Steel 135 Mod / Nitriding (AMS 6470 / AMS 6472 / AMS 6471)
Technical Data Sheet
NITRALLOY 135™Modified VAC-ARC is a low alloy nitriding grade of steel with moderate hardenability. As will all nitriding steels NITRALLOY 135™Modified VAC-ARC provides a high case hardness without affecting the core properties of the metal. NITRALLOY 135™Modified VAC-ARC is generally used for aircraft gears, shafts, pinions, crankshafts, cams, camshafts and bolts.
| Chemical Composition Limits | ||||||
| Weight% | C | Mn | Si | Cr | Mo | Al |
| NITRALLOY 135™Modified VAC-ARC | 0.40 | 0.60 | 0.30 | 1.60 | 0.35 | 1.20 |
Availability
NITRALLOY 135™Modified VAC-ARC is available in bar (round bar). For all stock availability contact Sales.
Typical Mechanical Properties
| Material | Size in Section cm | Ultimate Tensile Strength (Mpa) | Yield Strength (Mpa) | % Elongation | % Reduction of Area | Hardness HBW |
| NITRALLOY 135™Modified VAC-ARC | 3.8 | 930 | 690 | 16 | 50 | 280-340 |
| NITRALLOY 135™Modified VAC-ARC | 3.8-7.6 | 860 | 620 | 15 | 40 | 280-340 on surface 269-321 on test specimen |
| NITRALLOY 135™Modified VAC-ARC | 7.6-12.7 | 760 | 580 | 15 | 40 | 269-321 on surface 240-300 on test specimen |
Specifications
AMS 6470
AMS 6471 (Vac Melt)
AMS 6472
AMS 2301
AMS 2304
AMS-S-6709
MIL-S-6709A
ASTM A322
