1, the martensitic stainless steel welding martensitic stainless steel including chromium of from 5 to 9% chromium steel containing 12% chromium and high chromium steel . Such tendency of large steel hardened , high hardness after welding, easy to produce the brittle martensite and bainite increasesPlus , the residual stress is large, cracks prone to cold . It generally must be preheated before welding and interlayer insulation, cooling after welding yet before tempering .2 , chrome 13 stainless steel welding : These chrome steel welded Stainless Steel Welding Rod  sclerosing large , prone to cracking , the use of similar chromium stainless steel electrode (CHK202, CHK207) welding , it must be above 300 ℃Preheat and post-weld tempering about 700 ℃ slow cooling process . If the weldment after welding can not be processed, the application chrome stainless steel electrode (CHS107, CHS207) , such as welding 3 , 17 chromium stainless steel welding : Such chrome steel is usually improved weldability and corrosion resistance and increase the amount of stabilizing elements titanium, niobium, molybdenum, chromium 13 weldability than steel as well , can be of the same type Gang welding chromium stainlessArticle (CHK302, CHK307) welding . Before welding , weldment should be about 200 ℃ preheating, welding after about 800 ℃ tempering . Also can be chrome-nickel stainless steel electrode ( eg CHS107, CHS207), after weldingWithout heat treatment .