904L stainless steel plate is a single-phase austenitic structure, high Ni low C stainless steel. In the welding process, 904L super austenitic stainless steel plate is very easy to appear hot cracks, especially pit cracks. What are the precautions for welding of 904L super austenitic stainless steel plate?
1, control the content of harmful elements such as S P in base metal and welding material.
2, large groove, small fusion ratio.
3. Small heat input is not allowed to swing.
4, the interlayer temperature is less than 60 degrees.
5, reasonable welding sequence to reduce welding stress.
6. Choose low hydrogen type solder.
7, welding and arc welding is carried out after grinding to avoid crater cracks.
8. Root cleaning on the back is not allowed to use carbon arc gouging to prevent carburizing.
Above precautions for welding of 904L super austenitic stainless steel plate is very important to present hot cracks during 904L steel welding.
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