T-PUT Union MV MO description: Union MV Mo is a Mo-alloyed gas shielded seamless copper coated metal cored wire for the welding of low alloyed creep resistant steels and fine grained higher strength steels requiring toughness properties down to –20 C (stress relieved, 620 C / 15 h, + 20 C). It is suitable for applications which require creep resistance and ductility at service temperatures up to 500 C.