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How To Weld Martensitic Stainless Steels. Distance between tacks is 150-200mm. 33 AUSTENITIC STAINLESS STEEL The austenitic stainless steels contain 16-26 Cr 8-24 Ni Mn up to 040 C and small amounts of a few other elements such as Mo Ti Nb Cb and Ta.
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The turbine vendor has only qualified a GTAW procedure for the flat position using 309 filler metal. Type 410 have a moderate chromium content 12-18 Cr with low Ni but more importantly have a relatively high carbon content. The strengthening treatments for the PH stainless steels can be quite complex and require careful control to optimize properties.
TIG welding stainless steel is performed by using a non-disposable tungsten electrode with a TIG welder for striking up the arc.
Welding martensitic stainless steel. A post weld heat treatment may be needed to improve properties. Preheat then heat to 1800 1950 F 982 1066 C soak at temperature and air cool or oil quench. Ad 304 Stainless Steel Has Very good corrosion resistance weldability and cold deformability.
