42CrMo4 | AISI 4140 | DIN 1.7225 | JIS SCM44 Alloy Engineering Steel


42CrMo4 is structural steel and it’s very strong and hardenable. 42CrMo4 can achieve very good metal properties on the whole cross-section. For example, the maximum diameter is 70mm during quenching in oil and 50mm during quenching in water.

Furthermore, the overall performance of this heat-treated alloy steel is better than 35CrMo with using this kind of steel.

42CrMo4 steel is an improved steel grade of American AISI 4140 steel.

It is a good alternative for expensive chromium-nickel and chromium-nickel-molybdenum steel.


Table 1: Chemical composition ranges for 42CrMo4 Alloy Engineering Steel

42CrMo4 (1.7225)EN 10083-30.38-0.450.90-1.200.15-0.30 0.60-0.900.40 (Max)0.025 (Max)0.035 (Max)

Possible Alternative

Table 2: Equivalent Alloy Material of 42CrMo4 Alloy Engineering Steel

EN 10083-342CrMo4 (1.7225)AISI SAE; ASTM A29/A29M4140GB/T 307742CrMoJISG 4105SCM440ISO 683-1842CrMo4

Available Forms of 42CrMo4 in Market:

  • Round bars
  • Hexagonal Bars
  • Flat bars
  • Steel Tubes and Pipes
  • Wires
  • Steel Rods
  • Forgings or Steel Die forgings
  • Sheets and plates
  • Cold-rolled steel strips
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