Grade HM42
AISI
American Iron and Steel Institute
M42
Other Names
Classification Tool Steel
HM42 Chemical Element Composition Content (%)
Component C Cr Mo W V Co
Nominal Value 1.1 4 9.5 1.5 1 8
HM42 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Steel: Quenching: 1160-1200°C
Tempering: 540-580°C
HRC:65-68
Steel: Annealing HB:<285
For cutting tools: HRC:66-68
Plastic forming tools use: HRC:60-65

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