Complaint
| Chemical Composition (%) of ASTM A234/A234M | |||||||||||||
Grade | Type | C | Si | S | P | Mn | Cr | Ni | Mo | Other | ób | ós | δ5 |
| WP91 | 0.08-0.12 | 0.2-0.5 | 0.01 | 0.02 | 0.3-0.6 | 8-9.5 | 0.4 | 0.85-1.05 | See sdandard | 585-760 | 415 | 20 | 248 |
| Mechanical Properties of ASTM A234 Alloy Steel Pipe Fittings | ||||
| Grade | Tensile Strength, min. ksi[MPa] | Yield Strength, min. ksi[MPa] | Elongation, min. % | |
| Longitudinal | Transverse | |||
| WP91 | 90[620] | 60[415] | 20 | 13 |
Pipe fittings of ASTM A234 alloy steel, after forming at an elevated temperature, shall be cooled to a temperature. below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air.
