GADS Vitallium

UNS #R31539

Micro-Melt® GADS Vitallium alloy is a non-magnetic, cobalt-chromium-molybdenum wrought alloy exhibiting high strength, corrosion resistance, and wear resistance. Its attributes inlcude a homogeneous chemistry and microstructure, small, uniformly distributed carbides, fine austenitic grain size, improved forgeability, and machinability, and it retains a high strength level after high temperature annealing. This alloy is a powder metallurgy version of BioDur CCM with purposeful additions of rare-earth lanthanides for dispersion strengthening. This provides increases strength and fatigue performance. This alloy is equivalent to ASTM F 1537 Alloy #3 and meets the requirements of ASTM F1537, as well as ASTM F799 without thermal-mechanical processing. Produced by vacuum induction melting (VIM) followed by gas atomization and hot isostatic pressing to produce 100% dense billets, these billets are then processed by conventional steel-making practices to produce finished products.

Type Analysis

  • Carbon (Maximum) 0.15
  • Silicon (Maximum) 1
  • Nickel (Nominal) 0.5
  • Chromium (Nominal) 26.00-30.00
  • Cobalt (Nominal) Balance
  • Molybdenum (Nominal) 5.00-7.00
  • Iron (Nominal) 0.75
  • Nitrogen (Nominal) 0.25


total hip, knee, and shoulder replacements, small diameter bar and wire applications, where high strength or high fatigue resistance is required.

Applicable Specifications

  • ASTM F1537
  • ASTM F799


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