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

Grade: F53 (ferritic-austenitic stainless steel)
UNS number: S32750

Chemical Requirements, %
C: ≤0.030
Mn: ≤1.20
P: ≤0.035
S: ≤0.020
Si: ≤0.80
Cr: 24.0-26.0
Ni: 6.0-8.0
Mo: 3.0-5.0
N: 0.24-0.32
Cu: ≤0.50

Heat treatment
Solution treat and quench, ≥1025 °C
Cooling media, liquid
Quenching cool below 260℃

Tensile Requirements
Tensile Strength, ≥800MPa
Yield Strength, ≥550MPa
Elongation2 in. or 50 mm (or 4D), ≥15%
Brinell Hardness, ≤310