ASTM A182 – Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High Temperature Service

Grade: F44 (austenitic stainless steel)
UNS number： S31254

Chemical Requirements, %
C: ≤0.020
Mn: ≤1.00
P: ≤0.030
S: ≤0.010
Si: ≤0.80
Ni: 17.5-18.5
Cr: 19.5-20.5
Mo: 6.0-6.5
Cu: 0.50-1.00
N: 0.18-0.22

Heat treatment
Solution treat and quench, ≥1150°C
Cooling media, liquid
Quenching cool below 260℃

Tensile Requirements
Tensile Strength, ≥650MPa
Yield Strength, ≥300MPa
Elongation2 in. or 50 mm (or 4D), ≥35%
Reduction of Area, ≥50%