416 Stainless Steel Bar

416 stainless is a free-machining variation of martensitic stainless steel with the addition of sulphur or selenium. The material can be hardened by heat treatment to higher strength and hardness levels. It has better machining properties than the austenitic grades, but lower corrosion resistance.


  • Cutlery and kitchen utensils
  • Steam and gas turbine blades
  • Fasteners
  • Bushings
Typical Chemical Properties
416 Stainless Steel (annealed condition)
Minimum Properties
Ultimate Tensile Strength, psi 74,700
Yield Strength, psi 39,900
Elongation 30%
Rockwell Hardness B82
Iron (Fe) 84%
Carbon (C) 0.15% max
Chrome (Cr) 13%
Manganese (Mn) 1.25% max
Molybdenum (Mo) 0.6% max
Phosphorus (P) 0.06% max
Sulphur (S) 0.15% min
Silicon (Si) 1% max
The characteristic orthorhombic martensite microstructure was first observed by German microscopist Adolf Martens around 1890. Martensitic steels are low carbon steels built around the Type 410 composition of iron, 12% chromium, and 0.12% carbon. They may be tempered and hardened. Martensite gives steel great hardness, but it also reduces its toughness and makes it brittle, so few steels are fully hardened.

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