Supreme Steels

Alloy 431

Alloy 431 - Martensitic Stainless Steel

Alloy 431 is a high-performance martensitic stainless steel known for its excellent corrosion resistance, high strength, and toughness. It is commonly used in marine environments and applications that require good mechanical properties combined with resistance to wear and corrosion, especially in conditions involving moderate to severe corrosive environments.

Features of Alloy 431:

Specifications:

Applicable Standards:

Mechanical Properties:

Property Value
Tensile Strength ~750 MPa
Yield Strength ~500 MPa
Elongation ~15%
Hardness (BHN) ~300-350
Density 7.75 g/cm³

Thermal Properties:

Chemical Composition:

Element Percentage (%)
Chromium (Cr) 15.0-17.0
Nickel (Ni) ≤1.0
Manganese (Mn) ≤1.0
Silicon (Si) ≤1.0
Carbon (C) 0.20-0.30
Phosphorus (P) ≤0.04
Sulfur (S) ≤0.03