Standard: EN10216-2
15NiCuMoNb5-6-4 (DIWA373, 15NiCuMoNb5, or WB36) is a material developed by Mannesmann, a German company, for nuclear power generators and high-parameter thermal power generators. It is produced by adding alloy elements such as Ni, Cu, Mo, and Nb to carbon manganese steel. The addition of these alloy elements, Ni, Cu, Mo, and Nb, in the steel provides fine grain strengthening and precipitation strengthening, significantly enhancing the steel's high-temperature strength and strength without reducing its plasticity due to the addition of Cu.
The 15NiCuMoNb5-6-4 steel features high strength, with a yield strength 40% higher than that of 20g steel. It is suitable for high-pressure pipes with wall temperatures up to 500°C, or for high-temperature pipes. Additionally, it can be used in high-parameter thermal power plant high-pressure components, such as boiler drums, steam-water separators, headers, steam generators, steam pipes, and nuclear power equipment.
Manufactured using seamless process, the 15NiCuMoNb5-6-4 (WB36) high-pressure boiler tubes. Quick details: Type: Seamless steel tube, Technique: Hot rolled or cold drawn, Standard: EN 10216-2, Outer diameter: 25mm-508mm, Wall thickness: 6mm-35mm.
Length: 6000mm, 12000mm, or as required.
End Processing Types: Flat End, Bevel End, Threaded End
Surface Treatment: Pipes are painted (only externally) to prevent rusting.
Additional Information
Payment Terms: T/T, LC
Port of Loading: Tianjin, China | Packaging
As per customer's request
Mark: Standard + Steel Grade + Size + Heat Number + Batch Number
Delivery Time: Pipes will be completed within 30 days; expedited delivery times are subject to discussion.
Metallographic structure
15Nicumon B5-6-4 Seamless Steel Pipe (diwa373, WB36) is supplied in normalized (quenching) + tempered condition. After normalization and tempering, the microstructure is Bainite + Ferrite + Sorbite or Bainite + trace Ferrite.
Welding Materials
15nicumonb5-6-4 steel pipes have excellent welding properties. Hand welding rods L-80 (AWS-E11016G), tungsten electrode argon arc welding wire SMH-80 (AWS-E110S), or equivalent domestic welding materials are recommended. Preheating (temperature 150-200℃) is required before welding to avoid cracking. Stress relief treatment should be performed after welding.
Domestic W36 has good weldability and high sensitivity to cold cracks, but cold cracks can be prevented by preheating to 150°C, and it is not sensitive to reheating cracks. Manual arc welding is used, with che607ni electrodes on h10mn2nimoa/h08mn2moa filler wire and sj101 flux for submerged arc welding to achieve full welding. After heat treatment at 530-600°C post-welding, it exhibits excellent properties and meets manufacturing requirements.
15NiCuMoNb5-6-4 Seamless Steel Pipe Marking
