253 MA® is a heat-resisting austenitic stainless steel alloy wire modified with the rare earth element Cerium (Ce). 253 MA® is a unique alloy designed for welding 21% Cr-10% Ni grades of stainless steel including Avesta Sheffield 153 MA® (UNS S30415) and 253 MA® (UNS S30815). These special purpose 21% Cr- 10% Ni grades are now being used in petrochemical, refinery and power generating plants for fabricating and repairing tube hangers for steam super-heaters, furnace fans, ducting, dampers, muffles, retorts and pulverized coal burners in power boilers. 253 MA® provides weld deposits that offer excellent resistance to oxidation and scaling for service temperatures up to 2000°F (air), resistance to thermal shock. and for high creep-rupture strength. Currently, there is no AWS classification for this alloy