welding grade gas 焊接级保护气体 ; 焊接级气体
welding-grade argon 焊接级用氩 ; 烧焊级用氩
welding grade shield gas 焊接级保护气体
welding-grade helium 焊接级氦
welding quality grade 焊缝质量等级
grade of welding consumable 焊缝材料级别
For welding low-alloy and high strength steel with corresponding strength grade.
用于相同强度等级的低合金高强钢的焊接。
The results indicate that HAZ produced during welding of grade X80 steel is made up of grads structure under different temperature.
结果表明，X80级管线钢在焊接过程中形成的热影响区由不同温度下形成的梯度组织组成。
Welding electrodes and wires shall have chemical compositions and mechanical properties equal to or of higher grade than the base material.
焊条及焊丝的化学成分及机械性能应同母材的等级相同或更高。
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