Techniweld 309L 1/8x36in 10lb pkg Tig Rod (309L12536)Minimal carbon not greater than . 02% to protect against corosion Ideal for buttered passes and overlay work Typically used to weld 309 Series stainless steels Has the same qualities as ER309 but with the lower carbon content deemed necessary in many chemical applications. Has the same analysis as type 308 except the carbon content has been held to a maximum of . 03% to reduce the possibility of intergranular carbide precipitation.