The difference between the quality of stainless steel pipe fittings is mainly the difference in nickel content. Nickel is an excellent corrosion-resistant material. After being combined with chromium in stainless steel, the corrosion resistance and process performance of stainless steel can be improved. However, for low-carbon nickel steel to obtain a pure austenitic structure, the nickel content must reach 24%, and only when the nickel content is 27% can the corrosion resistance of the steel in certain media be significantly changed. The corrosion resistance of 310S stainless steel plate mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal structure. The main role is chromium.
The welding arc and the end of the stainless steel pipe fittings should be smoothly transitioned, and the weld bead should not be too high, and good fusion must be ensured to prevent defects such as penetration and slag inclusion. If the weld is cracked, the weld at the crack must be removed and repositioned. . After tack welding, if the interface is uneven, it should be corrected before formal welding. Try to avoid forced assembly. If the tack weld or formal weld is cracked in the welding process, increase the length of the tack weld, reduce the pitch of the tack weld, or take heat treatment measures if necessary. ".
There are also many processing methods for stainless steel pipe fittings. Many also belong to the category of mechanical processing, and the most used are stamping, forging, roller table processing, rolling, wrapping, drawing, bending and combined processing. . Pipe fitting processing is an organic combination of processing and metal pressure processing.
