Supreme Steels

440C

Special Stainless Steel: 440C - High Carbon Martensitic Stainless Steel

Alloy 440C is a high-carbon, high-chromium martensitic stainless steel that is highly valued for its excellent hardness, wear resistance, and moderate corrosion resistance. It is one of the highest carbon-content stainless steels in the martensitic class, which allows it to achieve a very hard, durable, and corrosion-resistant surface when heat treated.

Features of 440C:

Specifications of 440C:

Applicable Standards:

Mechanical Properties:

Property Value
Tensile Strength ~760 MPa
Yield Strength ~490 MPa
Elongation ~12%
Hardness (BHN) 450-500
Density 7.75 g/cm³

Applicable Standards:

Chemical Composition:

Element Percentage (%)
Chromium (Cr) 16.0-18.0
Nickel (Ni) ≤0.75
Manganese (Mn) ≤1.0
Silicon (Si) ≤1.0
Carbon (C) 0.95-1.20
Phosphorus (P) ≤0.04
Sulfur (S) ≤0.03