DME University

Composition and Physical Properties of AISI 4140

4140 Steel Composition

Composition

  • C – 0.36 – 0.44%
  • Mn – 0.70 – 1.00%
  • Si – 0.15 – 0.40%
  • Cr – 0.80 – 1.15%
  • Mo – 0.15 – 0.25%

Physical Properties

  • Good toughness
  • Good wear resistance
  • Comes in oversize tolerances in width and thickness
  • Good for wear parts and slides

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