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发表于 2008-2-21 13:19
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来自： 中国辽宁大连
对焊接材料也不太了解，但我觉得应该不一定。
焊材大致分成10 strength levels，Normal tensile strength is indicated by `N’. Higher tensile strength is indicated by `Y’, and if the yield strength is higher than 375 N/mm2 the Y is followed by a number (40 to 69)。
看下面这个表格
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从上面可以看出1N的，照样可以用于普通钢和高强度钢AH 27s的，尽管这种钢给我的感觉基本接近普通钢。当然，如果高强度钢级别再高点，我觉得就不行了，就必须用高强度的Y了，比如普通钢A和AH 36。
但经常，比如AH 32和AH 36，可以用2Y40，也可以用1Y。
也就是注意下面些话：
3.1.5. Electrodes approved for normal and higher strength levels up to and including ’Y’ are also considered suitable for welding steels in the three strength levels below that for which they have been approved.
3.1.6. Electrodes approved for strength levels between Y40 and up to and including Y50 are also considered suitable for welding steels in two strength levels below that for which they have been approved.
3.1.7. Electrodes approved for strength levels Y55 and above are also considered suitable for welding steels in only one strength level below that for which they have been approved.
就是说，如果用Y的话，适用的钢板可以往下降三个级别都行。Y40到50的，可以适用于其下两个级别的钢板，Y55以上的，只能降1个级别。 |
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发表于 2008-2-22 09:31
