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See Chinese contents: NB/T 47018.2-2017 NB/T 47018.2-2017: Technical permission of welding materials for pressure equipment. Section 2: Electrodes for steel
This Part of NB/T 47018-2017 specifies the technical requirements, deposited metal bending test and product marking for the steel electrodes. This Part is applicable to the electrodes for non-alloy and fine-grain steels, electrodes for creep-resisting steels, electrodes for high-strength steel, and stainless-steel electrodes used for the pressure equipment.
