ASTM A182 F91

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

Grade: F91

Chemical Requirements   max,%

ElementsA182 F91
Carbon0.08-0.12
Manganese0.30-0.60
Phosphorus0.020
Sulfur0.010
Silicon0.20-0.50
Nitrogen0.40
Chromium8.0-9.5
Molybdenum0.85–1.05
Columbium0.06-0.10
OthersV: 0.18-0.25
N: 0.03-0.07
Ni 0.40
Al: 0.02
Ti: 0.01
Zr: 0.01

 

Tensile and Hardness Requirements

GradeA 182 F91
Tensile Strength,min, ksi [Mpa]85[585]
Yield Strength, min,ksi [MPa]60[415]
Elongation in 2 in.[50 mm] or 4D,min, %20
Reduction of Area, min, %40
Brinell HardnessNumber248 max