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Why stainless steel flange after welding will crack?

Dec 16, 2016

In everyday life, flanges are mainly used for connecting pipes and keep the pipes sealing performance; a section of a pipeline to replace; easy to open checking pipes; facilitate the closure of a section of pipe.

Flange in the welding process, are cracking through hardness testing found cracked flanges 80 per cent higher than the intact falanli hardness, for what?

Stainless steel flanges are made of 20#, 304, 304L, 321, 316, 316L, 310S and other materials. Pressure class: 0.6Mpa ~32Mpa, 150Lb, ~2500Lb, and PN0.25-PN42.0

Typically, the welding current is too large, so changing weld heat-affected zone of the Organization reached a temperature, rapid cooling after welding, similar to the process of normalizing. Lead flange with high hardness, hardened, cracked.