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发表于 2022-6-21 13:16:32
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回帖奖励 +5 米粒
不知道你这个产品标准是什么,我用我们的产品举例说明下:我们产品用的标准是ASTM A403,在标准第7.3节有明确说明:In fittings of welded construction, the alloy content(carbon, chromium, nickel, molybdenum, niobium(columbium), and tantalum) of the deposited weld metal shall conform to that required of the base metal or for equivalent weld metal as given in the AWS filler metal specification A 5.4or A 5.9。也就是焊缝成分可以满足母材标准也可以满足焊材标准。考虑到另一种极端情况,焊缝成分可能不满足母材标准也不满足焊材标准,因此7.3节后面又增加了说明:However, it is possible that weld deposit chemistry will not meet the limits of either the base metal or the filler metal for some elements. The weld deposit chemistry shall meet the lowest minimum and highest maximum values for each specification element in either of the base metal or filler metal specification. Dilution of the base and filler metal must be considered when determining weld deposit criteria for over-alloyed filler metals.综合以上说明,焊缝的成分应不小于母材的最小值且不超过焊材的最大值。(A403标准中也有S31254这个材料)。
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