The welding bosses N-STEEL supplies can be made from different materials such as carbon steel, alloy steel, stainless steel, low temperature steel, etc. In manufacturing process, these welding nuts have to experience precision machining after die forging according to BS3799-1974 standard.
Due to its high quality and performance, our welding bosses have founded wide application in power generation, petroleum, natural gas, chemical, shipbuilding, heat supply, papermaking and metallurgy industries.
CLASS 3000, CLASS 6000
Carbon steel: A105
Alloy steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F 22
Stainless steel: A182 304-304H-304L-304N-304LN 316-316H-316L-316N-316LN 321-321H 347-347H
Low temperature steel: A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L 8
High performance steel: A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70