Similar usage as 309, but the .03% maximum carbon content increases resistance to inter-granular corrosion. Used for welding similar alloys in wrought or cast form. Occasionally used for welding 18-8 base metals when severe corrosion conditions exist, and, at times, welding dissimilar steels. Packaged for portable welding machines.
Harris 0309LF5 309L Welding Wire, Stainless Steel Spool, 0.035″ x 10 lb.: Mig Welding Equipment: Industrial & Scientific