Alloy Steel Pipe Fittings
Common alloy steel features great tenacity, thermal conductivity and electrical conductivity. It could also be a kind of carbon steel which is alloyed with other alloying elements, such as silicon, manganese, chromium, nickel, tungsten, vanadium and titanium, to improve its mechanical properties, including abrasion resistance, corrosion resistance and low temperature resistance, etc. The properties will vary depending on the alloying element types and percentages.
As one of alloy steels, low temperature steel is specifically used for production of pipe fittings applied in circumstances with temperature ranging between -20 and -253℃.
Production ProcessGenerally, alloy steel type and production process selected for manufacturing of alloy steel pipe fittings are determined by the outer diameter and wall thickness of the finished pipe fittings required. Please refer to the situations listed below.
| Outside diameter | Wall thickness | Material | Production process |
| 1/2 inch to 24 inches | STD-SCH80 | Seamless steel pipe | Hot press forming by mandrel |
| 6 inches to 30 inches | SCH160, SCHXXS and above | Seamless steel pipe | Hot press forming |
| 6 inches to 100 inches | ≤20mm | Steel plate | Cold forming by mold |
| ＞20mm | Hot forming by mold |
Once formed, alloy steel pipe fittings will have to go through different heat treatment processes based on the raw material grade first. Then non-destructive testing will be conducted for the surface, which includes magnetic powder detection and dye penetration inspection. If qualified, the surface will go through shot blasting process and then could be imprinted and packaged according to customers’ requirements.
Material Type- ASTM A234 WPB, WPC
- ASTM A234 WP11 CL1, WP11 CL2, WP12 CL1, WP12 CL2, WP22 CL1, WP22 CL3
- ASTM A234 WP91, WP5, WP9
- ASTM A420 WPL3, WPL6, WPL8
- ASTM A860 WPHY42, WPHY52, WPHY60, WPHY65, WPHY70, WPHY80
- ASTM A516 GR60, GR65, GR70
- EN10216 P235GH, P245GH, P265GH
