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发表于 2009-9-24 17:57
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来自： 中国山东烟台
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It is recommended that the minimum length of a tack weld should be 50 mm, but for material thicknesses less than 12 mm the minimum length of a tack weld shall be four times the thicker part. For materials of thickness greater than 50 mm or of yield strength over 500 N/mm2 consideration should be given to increasing the length and size of tack welds, which may involve the use of a two run technique.Consideration should also be given to the use of lower strength and/or higher ductility consumables when welding higher alloy steel. |
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