Forged flanges & fittings
ASTM A182 F2 — chemistry & properties
ASTM A182 F2 (Forged flanges & fittings, UNS K12122): chemical composition and mechanical properties. ½Cr-½Mo forgings for elevated-temperature service
Chemical composition (wt %)
| C | 0.05 – 0.21 |
| Mn | 0.3 – 0.8 |
| P | ≤ 0.04 |
| S | ≤ 0.04 |
| Si | 0.1 – 0.6 |
| Cr | 0.5 – 0.81 |
| Mo | 0.44 – 0.65 |
Mechanical properties
| Tensile strength, min | 485 MPa |
| Yield strength, min | 275 MPa |
| Elongation, min | 20 % |
| Hardness | 143–192 HBW |