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Home Material ASTM A182/A182M-2018
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USA UNS K90901
ASTM
Specification or Grade		 F 91
Corresponding Standard ASTM A182/A182M-2018
Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
Classification Alloy Steel
Properties Corrosion Resistance
Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Ni Mo N Ti V Nb Zr Al
Type 1 Minimum Value 0.08 0.2 0.3 - - 8 - 0.85 0.03 - 0.18 0.06 - -
Maximum Value 0.12 0.5 0.6 0.02 0.01 9.5 0.4 1.05 0.07 0.01 0.25 0.1 0.01 0.02
  Component C Si Mn P S Cr Ni Cu Mo As N Ti W V Nb Zr B Al Sn Sb
Type 2 Minimum Value 0.08 0.2 0.3 - - 8 - - 0.85 - 0.035 - - 0.18 0.06 - - - - -
Maximum Value 0.12 0.4 0.5 0.02 0.005 9.5 0.2 0.1 1.05 0.01 0.07 0.01 0.05 0.25 0.1 0.01 0.001 0.02 0.01 0.003
  Component C Si Mn P S Cr Ni Cu Mo As N Ti W V Nb Zr B Al Sn Sb
Product* Minimum Value 0.07 0.2 0.3 - - 8 - - 0.8 - 0.035 - - 0.16 0.05 - - - - -
Maximum Value 0.13 0.4 0.5 0.02 0.005 9.5 0.2 0.1 1.05 0.01 0.07 0.01 0.05 0.27 0.11 0.01 0.001 0.02 0.01 0.003

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