Grade 8Cr4Mo4V
B20440
Other Names
Old Grade
Corresponding Standard YB 4105-2000
High Temperature Bearing Steel for Aircraft Engine
Classification Bearing Steel
8Cr4Mo4V Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo W V Co O
Minimum Value 0.75 - - - - 3.75 - - 4 - 0.9 - -
Maximum Value 0.85 0.35 0.35 0.015 0.008 4.25 0.2 0.2 4.5 0.25 1.1 0.25 1.0E-5
8Cr4Mo4V Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
Annealing 197~241

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