42CrMo
Chinese Standard GB / T 3077-1999
Which corresponds to ISO Grade: 42CrMo4
Japan corresponding grades: SCM440
Germany corresponding grades: 42CrMo4 or 1.7225
Corresponds approximately U.S. Grade: 4140 or G41400
● Features and Scope:
Strength, hardenability, good toughness, when small deformation hardening, high strength and creep rupture strength at high temperatures. Requirements for the manufacture of higher intensity than the 35CrMo steel and tempered forgings larger cross-section, such as the big locomotive traction gears, supercharger drive gear, pressure vessel gear, rear axle, greatly affected by the load rod and spring can also be used to 2000m deep oil drill pipe joints and fishing tools, and can be used to mold and other bending machines. | 
