PRODUCTSWELDING CONSUMABLES
Heat Resisting Steel Boiler Tube/Pipe Submerged Arc Welding Material NB-250M×Y-521H
Characteristics
NB-250M is a high basic type flux of low hydrogen content and, therefore, susceptibility to cracking caused by hydrogen is low. The weld metal shows excellent low temperature toughness and resistance to embrittlement during service.
Applications
Multi-layer welding of extremely thick 2.25%Cr-1%Mo heat resisting steel for petroleum refining apparatus and chemical plants.
- JIS Z 3183 S642-2CM☆
- AWS A5.23 F9P2-EG-B3☆
Downloads
Approvals
Reference data
- Not all product sizes have been certified.
- Approvals are updated from time to time, but in case of expiration or cannot find it, please inquiry via contact us.
- ☆It means that the product meets the classification requirements but that the JIS Mark system and AWS are not authentication to the classification by third parties.
- ★It means that the product meets most of the classification requirements. However, there is for example a partial deviation in chemical composition etc.