42CrMo steel is ultra-high strength steel, with high strength and toughness, hardenability is also good, no obvious tempering brittleness, high fatigue and resistance to multiple shocks after tempering treatment, low temperature impact toughness is good. The steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain strength and toughness, and the surface quenching after tempering is usually used as the heat treatment program.
42CrMo alloy steel Chemical composition:
| element | C | Cr | Mo | Si |
| content | 0.38～0.45% | 0.90～1.20% | 0.15～0.25% | 0.17～0.37% |
| Ni | Mn | S | P | Cu |
| ≤0.030% | 0.50～0.80% | ≤0.035% | ≤0.035% | ≤0.030% |
42CrMo alloy steel application scope:
42CrMo alloy steel has the characteristics of strength, high hardenability, good toughness, small deformation during quenching, high creep strength and lasting strength at high temperature. It is used to manufacture forgings requiring higher strength and larger tempering cross-section than 35CrMo steel, such as large gear for locomotive traction, supercharger transmission gear, pressure vessel gear, rear shaft, connecting rod and spring clamp with large load, and can also be used for drilling pipe joints and fishing tools in oil deep Wells below 2000m, and can be used for bending machine molds.
