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20号钢和20号钢焊接用什么焊条

2025-04-08 03:26:04

推荐回答（1个）

回答1：

不重要构件，用牌号J422，型号E4303钛钙型低碳结构钢焊条焊接。
重要构件，用牌号J426，型号E4316低氢钾型低碳结构钢焊条焊接；或牌号J427，型号E4315低氢钠型低碳结构钢焊条焊接。
20号钢属于优质低碳结构钢牌号，相当于Q245，焊接性较好。

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