ASTM A182 F9

ASTM A182 – Forged or Rolled Alloy and Stainless Steel Pipe Flanges, 

Forged Fittings, and Valves and Parts for High Temperature Service

Grade: F9 

UNS number: K90941

Category: Low Alloy Steels

Chemical Requirements, %

C: ≤0.15

Mn: 0.30-0.60

P: ≤0.030

S: ≤0.030

Si: 0.50-1.00

Cr: 8.0-10.0

Mo: 0.90-1.10

Heat treatment:

1.Anneal: ≥955 °C, furnace cool.

2.Normalize(≥955 °C)+temper(≥675 °C)

Tensile Requirements:

Tensile Strength: ≥585MPa

Yield Strength: ≥380MPa

Elongation: ≥20

Reduction of Area: ≥40

Hardness(HB): 179-217