Wrought butt-weld fittings
ASTM A234 WP1 — chemistry & properties
ASTM A234 WP1 (Wrought butt-weld fittings, UNS K12821): chemical composition and mechanical properties. Carbon-moly butt-weld fittings for P1 piping
Chemical composition (wt %)
| C | ≤ 0.28 |
| Mn | 0.3 – 0.9 |
| P | ≤ 0.045 |
| S | ≤ 0.045 |
| Si | 0.1 – 0.5 |
| Mo | 0.44 – 0.65 |
Mechanical properties
| Tensile strength, min | 380 MPa |
| Yield strength, min | 205 MPa |
| Elongation, min | 22 % |
| Hardness | 197 HBW max |