Differences between ER308 and THT304 wires for TIG welding of stainless steel 304
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When welding 304 stainless steel using TIG welding, ER308L is the preferred choice if required, as it is a ultra-low carbon version of stainless steel; if cost is a concern and no special requirements exist, then THT304, which is a regular welding wire, can be used.
When welding 304 stainless steel using TIG welding, it is preferable to use ER308L if required; however, this is not entirely accurate. TIG welding of 30403 is done using ER308L wire. For welding 30408, ER308 wire should be used; ER308L wire cannot be used for this purpose.