Forged flanges & fittings
ASTM A182 F5 — chemistry & properties
ASTM A182 F5 (Forged flanges & fittings, UNS K41545): chemical composition and mechanical properties. Refinery heater and hydrogen service
Chemical composition (wt %)
| C | ≤ 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.03 |
| S | ≤ 0.03 |
| Si | ≤ 0.5 |
| Cr | 4 – 6 |
| Ni | ≤ 0.5 |
| Mo | 0.44 – 0.65 |
Mechanical properties
| Tensile strength, min | 485 MPa |
| Yield strength, min | 275 MPa |
| Elongation, min | 20 % |
| Hardness | 143–217 HBW |