Yes, stainless steel sections can be welded using TIG (GTAW), MIG (GMAW) or MMA processes, but the correct filler material must be used to match the parent metal grade — using a standard mild steel filler will compromise corrosion resistance at the weld zone. Post-weld passivation or pickling is recommended for critical applications to restore the chromium oxide passive layer disturbed during welding.
Heat input should be controlled to minimise sensitisation (carbide precipitation at grain boundaries), particularly with 304 grade in high-temperature applications. For fabrications requiring maximum corrosion resistance, consider specifying low-carbon grades (304L or 316L), which are specifically formulated to resist sensitisation during welding.
