Forged flanges & fittings
ASTM A182 F22 Cl.1 — chemistry & properties
ASTM A182 F22 Cl.1 (Forged flanges & fittings, UNS K21590): chemical composition and mechanical properties. Lower-strength 2¼Cr-1Mo forgings; used where hardness control is needed
Chemical composition (wt %)
| C | 0.05 – 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.04 |
| S | ≤ 0.04 |
| Si | ≤ 0.5 |
| Cr | 2 – 2.5 |
| Mo | 0.87 – 1.13 |
Mechanical properties
| Tensile strength, min | 415 MPa |
| Yield strength, min | 205 MPa |
| Elongation, min | 20 % |
| Hardness | 170 HBW max |