The alloy number on a stainless electrode relates to weld-metal composition and intended use. The L suffix indicates lower carbon, helping reduce sensitisation risk.
E308L-16
A common choice for 304 and 304L stainless steels.
E309L-16
Used for stainless-to-carbon-steel dissimilar joints and stainless overlays. Base-metal dilution must be controlled.
E316L-16
Molybdenum-bearing and used for 316 and 316L steels where higher corrosion resistance is required.
Before final selection
Confirm exact base grade, process media, service temperature, heat treatment, project standard and WPS. The -16 suffix also relates to coating and operating characteristics.