Forged flanges & fittings
ASTM A182 F12 Cl.1 — chemistry & properties
ASTM A182 F12 Cl.1 (Forged flanges & fittings, UNS K11562): chemical composition and mechanical properties. 1Cr-½Mo forgings for boiler and steam piping
Chemical composition (wt %)
| C | 0.05 – 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.045 |
| S | ≤ 0.045 |
| Si | ≤ 0.5 |
| Cr | 0.8 – 1.25 |
| Mo | 0.44 – 0.65 |
Mechanical properties
| Tensile strength, min | 415 MPa |
| Yield strength, min | 220 MPa |
| Elongation, min | 20 % |
| Hardness | 121–174 HBW |