Spot welding
OverviewCharacteristicsProcess and equipmentApplicationsModificationsSee alsoExternal linksThe spot welding process tends to harden the material, causing it to warp. This reduces the material''s fatigue strength, and may stretch the material as well as anneal it. The physical effects of spot welding include internal cracking, surface cracks and a bad appearance. The crack around the weld nugget will be extended under an external load or fatigue to produce a different type of failure. The chemical properties affected include the metal''s internal resistance and its corrosiv