KJ42CrMo
High-quality Forged Hot Work Mold Steel
Mainly used in various machinery manufacturing fields, such as aerospace, automotive, shipbuilding, petrochemical, mining machinery, etc.
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Application Cases
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  • 提取自2025-03科佳航天产品样本40-P-中英文-4_14.jpg
Product Features
  • Possesses good plasticity and toughness, and can maintain good mechanical performance while being subjected to relatively high stress.

  • Exhibits good wear and corrosion resistance, making it suitable for demanding applications in various complex environments.

Grade Comparison
KJ42CrMO
EU Standard
42Crmo4
US Standard
4140
Japanese Standard
SCM440
Chemical Composition (wt%)
KJ42CrMo
C
0.38-0.45
Si
0.17-0.37
Mn
0.50-0.80
P
≤0.030
S
≤0.030
Cr
0.90-1.20
Mo
0.15-0.25
Ni
≤0.30
Non-Metallic Inclusions
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