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,%
| Elements | A182 F91 |
| Carbon | 0.08-0.12 |
| Manganese | 0.30-0.60 |
| Phosphorus | 0.020 |
| Sulfur | 0.010 |
| Silicon | 0.20-0.50 |
| Nitrogen | 0.40 |
| Chromium | 8.0-9.5 |
| Molybdenum | 0.85–1.05 |
| Columbium | 0.06-0.10 |
| Others | V: 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
| Grade | A 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 HardnessNumber | 248 max |