Techalloy 309/309L description: Techalloy 309/309L electrodes have reduced carbon levels (0.04% max) that offers increased resistance to inter-granular corrosion. Type 309/309L is ideal for joining stainless steels to themselves or to carbon or low alloy steels, and can be used at temperatures of up to 700F (371C). Reduced carbon levels help prevent intergranular corrosion.
Applications: Do not exceed service temperatures of 700F (371C).