20Mo-6® HS

UNS #N08036

20Mo-6 HS stainless is the result of compositional and processing modifications made to 20Mo-6 stainless for enhanced work hardening response. It is a 6% Mo austenitic alloy possessing a unique combination of corrosion resistance and ultra-high tensile strength capability (up to 280 ksi [1930 MPa]) with good ductility. The HS grade achieves high strength through cold work, not by heat treatment. In the cold-worked condition, 20Mo-6 HS stainless retains excellent resistance to environmental cracking and chloride-induced pitting and crevice corrosion while remaining nonmagnetic. Because of its combination of mechanical, physical and corrosion resistance properties, 20Mo-6 HS stainless is suited for aggressive environmental conditions where high strength is required.

Type Analysis

  • Carbon (Maximum) 0.06
  • Phosphorus (Maximum) 0.03
  • Silicon (Maximum) 0.5
  • Nickel (Nominal) 33.00-37.00
  • Manganese (Maximum) 1
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 22.00 - 26.00
  • Molybdenum (Nominal) 5.00-6.70
  • Iron (Nominal) Balance
  • Copper (Nominal) 1.00-3.00
  • Nitrogen (Nominal) 0.17-0.40


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