321 Stainless Steel is an austenitic chromium-nickel stainless steel containing Titanium which is recommended for parts fabricated by welding which cannot subsequently be annealed. 321 Stainless Steel is a stabilized austenitic stainless steel similar to ss 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. 321 Stainless Steel provides excellent resistance to oxidation and corrosion and possesses good creep strength.

Type 321 Stainless Steel Properties

Corrosion Resistance: Type 321 stainless steel has excellent corrosion resistance in a wide range of environments. It can withstand exposure to water, chemicals, and other corrosive substances without corroding or rusting.

Strength: Type 321 stainless steel has high tensile strength and can withstand heavy loads without bending or breaking. It has a minimum tensile strength of 515 MPa and a minimum yield strength of 205 MPa.

Ductility: Type 321 stainless steel has good ductility, which means that it can be easily formed and shaped without cracking or breaking. This property makes it ideal for applications that require complex shapes or designs.

Weldability: Type 321 stainless steel is easily weldable, making it an excellent choice for applications that require welding. It can be welded using common welding techniques, such as TIG, MIG, and resistance welding.

Magnetic Properties: Type 321 stainless steel is non-magnetic in the annealed condition and becomes slightly magnetic after cold working. This property makes it suitable for applications that require non-magnetic properties.

Heat Resistance: Type 321 stainless steel has excellent heat resistance and can withstand high temperatures without losing its strength or corrosion resistance. It can withstand temperatures up to 870°C (1600°F) without undergoing any significant change in its properties.

321 Steel Grade Worldwide Equivalents

0Cr18Ni10Ti SUS321 321 X10CrNiTi18-9 Z6CNT18-10 X6CrNiTi18-10 08KH18N10T 2337 321S31
1Cr18Ni11Ti X6CrNiTi18-10 08KH18N12T
H0Cr20Ni10Ti 12KH18N10T

Chemical Composition of 321 Stainless Steel

Type 321 Stainless Steel Chemical Composition

UNS Grades C Mn P S Si Cr Ni Mo N Cu EF
S32100 321 (1Cr18Ni10Ti) 0.08 2 0.045 0.03 0.75 17.0-19.0 9.0-12.0 0.1 Ti:5(C+N)min,

Physical Properties of 321 Stainless Steel

Property Density, lb/in3 Modulus of Elasticity, psi Coefficient of Thermal Expansion, 68-212˚F, /˚F Thermal Conductivity, Btu/ft hr ˚F Specific Heat, Btu/lb ˚F Electrical Resistivity, Microohm-in
321 Data 0.286 28.0 x 106 9.2 x 10-6 9.3 0.12 28.4

Common Uses of 321 Stainless Steel

Useful in the chromium carbide precipitation range (800-1500°F, 427-815°C)
Aircraft exhaust stacks
Chemical processing equipment
Welded equipment
Jet engine parts
Heat Exchangers
Expansion joints

What Stainless Steel Grades We Have!

Qinghe Steel is a full line supplier and processer of 321 stainless steel coil, sheet, plate, bar, and strip products. We stock many grades of stainless steel, including 300 and 400 series stainless, annealed and in various tempers and high temperature grades, for shipments worldwide. View our steel center here

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