UNS #K23080

4330+V VAC-ARC steel is a modification of 4330 steel with hardenability and other properties improved by the addition of vanadium. A low alloy steel capable of being heat treated to high strength levels, it is primarily used in the 220 to 240 ksi (1517-1655 MPa) strength range. The comparatively low carbon content of the alloy makes it particularly useful in applications involving shock loading or stress concentration.

Type Analysis

  • Carbon (Nominal) 0.3
  • Silicon (Nominal) 0.3
  • Nickel (Nominal) 1.8
  • Manganese (Nominal) 0.85
  • Chromium (Nominal) 0.85
  • Molybdenum (Nominal) 0.4
  • Iron (Nominal) Balance
  • Vanadium (Nominal) 0.07


Shock loading or stress concentration applications

Applicable Specifications

  • AMS 6411
  • AMS 6427
  • CE-0906 (Bendix)
  • BMS 7-122 (Boeing)
  • BMS 7-27 (Boeing)
  • FMS 1012 (General Dynamics)
  • EMS 96242 (Honeywell)




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