253 MA is an austenitic stainless-steel filler metal designed to produce weld deposits that exhibit outstanding oxidation resistance at extreme temperatures. Used for welding of high temperature stainless alloys to itself and to carbon steels found in applications such as petrochemical, burner nozzles, power boilers, refineries, furnace fans, dampers, muffles, heat recuperate systems and steam super heater tube hangers. Keep interpass as low as possible; Interpass temperature 300°F max and heat input of 10-30 kJ/in.; Heat Input = Voltage x Amperage x6٪TravelSpeed (inch/Minute) x 100.
(1)(Ar Tri-mix gas = 68%Ar+30%He+2.0%CO2)
TYPICAL WIRE CHEMISTRY (%)