403 Stainless Steel Bar


403 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard. 403 stainless steel is a stainless heat-resistant steel developed for the production of steam turbine blades and high-stress components. It is composed of carbon, manganese, chromium, nickel and other chemicals. It has high tensile strength and is generally delivered in a heat-treated state. It can has esistance and a scaling temperature of about 1300°F. It is a corrosion and heat resistant 12% Cr martensitic stainless steel. This alloy offers a wide range of mechanical properties that are obtainable by appropriate heat treatments. It is easily hardened by oil, fan or air cooling and may be tempered at temperatures of up to 1350°F (732°C) to improve fracture toughness. Oil or fan cooling is required in thicker sections


Chemical Composition:


C: ≤0.15

Mn: ≤1.00

Cr: 11.50~13.00

Ni: ≤0.60


Mechanical Properties:


Tensile strength σb (MPa): quenched and tempered, ≥590

Conditional yield strength σ0.2 (MPa): quenched and tempered, ≥390

Elongation δ5 (%): quenching and tempering, ≥25

Reduction of area ψ (%): quenching and tempering, ≥55

Impact energy Akv (J): quenching and tempering, ≥118

Hardness: annealing, ≤200HB; quenching and tempering, ≥170HB


Heat treatment specification and metallographic structure:


  • Heat treatment specifications: 1) Annealing, 800~900℃ slow cooling or about 750℃ fast cooling; 2) Quenching, 959~1000℃ oil cooling; 3) Tempering 700~750℃ fast cooling.
  • Metallographic structure: The structure is characterized by martensite.


Delivery Status:


Generally, the delivery is in the heat treatment state, and the type of heat treatment is indicated in the contract; if it is not specified, the delivery is in the non-heat treatment state.




Compressor blades

Turbine parts

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