ASTM A312 TP321

ASTM A312 TP321

Chemical Requirements:  Composition, %, max

GradeTP321(S32100)
Carbon0.08
Manganese2.00
Phosphorus0.045
Sulfur0.030
Silicon1.00
Chromium17.0-19.0
Nickel9.0-12.0
Nitrogen0.1a 

a The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.

 

Heat Treating Temperature: 1900 °F [1040 °C]

 

Tensile Requirements:

WeldedSeamless
≤ 3⁄8 in.> 3⁄8 in.
Tensile Strength, min ksi [MPa]75 [515]75 [515]70 [485]
Yield Strength, min ksi [MPa]30 [205]30 [205]25 [170]

 

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

Longitudinal35
Transverse25