Forged flanges & fittings
ASTM B462 Alloy 20 (UNS N08020) — chemistry & properties
ASTM B462 Alloy 20 (UNS N08020) (Forged flanges & fittings, UNS N08020): chemical composition and mechanical properties. Sulphuric acid plants, pickling and solvent service
Chemical composition (wt %)
| C | ≤ 0.07 |
| Mn | ≤ 2 |
| P | ≤ 0.045 |
| S | ≤ 0.035 |
| Si | ≤ 1 |
| Cr | 19 – 21 |
| Ni | 32 – 38 |
| Mo | 2 – 3 |
| Cu | 3 – 4 |
Mechanical properties
| Tensile strength, min | 550 MPa |
| Yield strength, min | 240 MPa |
| Elongation, min | 30 % |
| Hardness | Not specified |