UNS #K24728

D6AC VAC-ARC steel is a medium carbon, low alloy, ultra-high-strength steel primarily designed for high strength structural applications requiring strength levels up to 280,000 psi. This alloy provides a high yield strength to tensile strength ratio, combined with good ductility. With excellent notch toughness, a tough and fibrous fracture is exhibited to as low as -210F (-134* C) in impact testing, making it ideal for fracture toughness in critical applications at a variety of strength levels. D6AC is produced by consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure, which in turn provide optimum transverse mechanical properties

Type Analysis

  • Carbon (Nominal) 0.46
  • Silicon (Nominal) 0.25
  • Nickel (Nominal) 0.6
  • Manganese (Nominal) 0.75
  • Chromium (Nominal) 1.1
  • Molybdenum (Nominal) 1
  • Iron (Nominal) Balance
  • Vanadium (Nominal) 0.1


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Applicable Specifications

  • AMS 6431
  • AMS-S 8949
  • FMS1011 (General Dynamics)
  • GM 1013 (Grumman)
  • STM 05-500 (Lockheed)
  • LCM 05-2190 (Lockheed)
  • TL-428 (MAN Technology)





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