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SNCM439 Nickel Chromium Molybdenum Alloy Steel
SNCM439 (4340), with a carbon content ranging from approximately 0.36% to 0.43%. It possesses characteristics such as high hardness and toughness, it is widely used in manufacturing high-strength and wear-resistant mechanical parts such as bearings, gears, drive shafts, crankshafts, and suspension system components.
The steel codes of different countries are as below：
● American AISI: 4340
● Japanese JIS: SNCM439
● Chinese GB: 40NiCrMoA
The steel codes of different countries are as below：
● American AISI: 4340
● Japanese JIS: SNCM439
● Chinese GB: 40NiCrMoA
| C% | Si% | Mn% | P% | S% | Cr% | Mo% | Ni% | Cu% | Yield Strength(Mpa) | Tensile Strength(Mpa) | Elongation(%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.36-0.43 | 0.15-0.35 | 0.6-0.9 | 0≦0.03 | 0≦0.03 | 0.6-1 | 0.15-0.3 | 1.6-2 | 0≦0.3 | ≧885 | ≧980 | ≧16 |