ASTM A 312 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

Grade: TP321

UNS Designation:: S32100

Chemical Requirements(%):

C: ≤0.08

Mn: ≤2.00

P: ≤0.045

S: ≤0.030

Si: ≤1.00

Cr: 17.0-19.0

Ni: 9.0-12.0

Ti: 5×(C+N)-0.70

N: ≤0.10

Heat Treating Temperature:

Solution, ≥1040 °C

Tensile Requirements:

For welded pipe,

Tensile Strength, ≥515Mpa

Yield Strength, ≥205MPa

For seamless pipe,

• When t ≤9.50mm,

Tensile Strength, ≥515Mpa

Yield Strength, ≥205MPa

• When t ＞9.50mm,

Tensile Strength, ≥485Mpa

Yield Strength, ≥170MPa

Elongation in 2 in. or 50 mm (or 4D) (%),

Longitudinal: ≥35

Transverse: ≥25