Forged flanges & fittings
ASTM A182 F9 — chemistry & properties
ASTM A182 F9 (Forged flanges & fittings, UNS K90941): chemical composition and mechanical properties. Refinery furnace and high-temperature sulphidic service
Chemical composition (wt %)
| C | ≤ 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.03 |
| S | ≤ 0.03 |
| Si | 0.5 – 1 |
| Cr | 8 – 10 |
| Mo | 0.9 – 1.1 |
Mechanical properties
| Tensile strength, min | 585 MPa |
| Yield strength, min | 380 MPa |
| Elongation, min | 20 % |
| Hardness | 179–217 HBW |