Afundamentaltheoryfortheanalysisofresidualweldingstressesanddeformationbasedontheinherentstraindistributionalongtheweldedjointisintroduced.Distributionofinherentstrainsandlongitudinalresidualstressesinmediumthicknessplateweldmentiscalculatedandanalyzed.Anewmethodofcalculatinginherentstrainsandlongitudinalresidualstressesisproposed.