Supreme Steels

Alloy 321

Alloy 321 - Austenitic Stainless Steel

Alloy 321 is a titanium-stabilized, austenitic stainless steel known for its excellent resistance to high-temperature oxidation and corrosion. It is designed to perform well in high-temperature applications where the risk of carbide precipitation is a concern, particularly in environments with moderate to high levels of sulfur and other corrosive elements.

Features of Alloy 321:

Specifications:

Applicable Standards:

Mechanical Properties:

Property Value
Tensile Strength ~505 MPa
Yield Strength ~205 MPa
Elongation ~40%
Hardness (BHN) ~190
Density 7.93 g/cm³

Thermal Properties:

Chemical Composition:

Element Percentage (%)
Chromium (Cr) 17.0-19.0
Nickel (Ni) 9.0-12.0
Manganese (Mn) 2.0
Silicon (Si) ≤1.0
Carbon (C) ≤0.08
Titanium (Ti) 5x(C) to 0.70%
Phosphorus (P) ≤0.045
Sulfur (S) ≤0.030