42CrMo steel is high strength steel, high strength and toughness, hardenability is also good, no obvious temper brittleness, after quenching and high resistance to repeated impact fatigue limit the ability, good low temperature impact toughness. The manufacture of steel suitable for a certain strength and toughness requirements of large and medium-sized plastic mold.

● Features and application:

Strength, high hardenability, toughness, and quenching of small deformation, high temperature strength and high creep rupture strength. Requirements for the manufacture of higher intensity than 35CrMo steel and larger cross-section of quenched and tempered forgings, such as the large locomotive traction gears, supercharger drive gear, rear axle, by the great link and spring load can also be used the following 2000m deep oil drill pipe joints and fishing tools, and can be used for bending machine tooling.

Chemical composition
Carbon C: 0.38 ~ 0.45%

Si Si: 0.17 ~ 0.37%

Manganese Mn: 0.50 ~ 0.80%

Sulfur S: allow the residual content ≤ 0.035%

Phosphorus P: allow the residual content ≤ 0.035%

Chromium Cr: 0.90 ~ 1.20%

Ni: to allow the residual content ≤ 0.030%

Copper Cu: allow the residual content ≤ 0.030%

     Mo Mo: 0.15 ~ 0.25%