MIG 308LSi description: Similar usage as 308L, but the 0.65-1.00% silicon content improves wash and wetting behavior in the gas shielded welding processes. Used to weld base metals of similar composition such as 201, 202, 301, 302, 304, 305 and 308 (also the L series). The additional silicon content increases wetting action and yields a smooth bead.