Lincoln OEM NAME PLATE M30459 9SM30459 5K 53' spray or pulsed (thick sections) 702250000E spray or pulsed (thick sections) Back Purge 100% Ar back purge required for root pass in piping Preheat Not required for standard austenitic stainless at ambient Interpass Temp ≤ 350 °F (to prevent sensitization) Stainless steel has lower thermal conductivity than carbon steel — heat accumulates in the joint and can sensitize the heat affected zone if interpass temperature exceeds 350 °F CGA B Inert size (5 8 in Lincoln OEM NAME PLATE M30459 9SM30459 This item is built to order by Lincoln Electric and is non returnable and non cancellable once the order has been placed