Techalloy55DescriptionTechalloy55isusedforTIGandMIGweldingofcastiron.Thisfillermetalisextensivelyemployedtooverlaycastironrolls.Itisalsousedtorepaircastings.TheweldmetalofTechalloy55isharderthanthatofTechalloy99.However,themachiningcanbeaccomplishedbyusingcarbidetippedtools.Apre-heatandinterpasstemperatureof350°F(175°C)minimumisrecommendedduringwelding,withoutwhichtheweldandheataffectedzonescoulddevelopcracks.TypicalChemicalCompositionCMnSiFeCrMoNiNbWSPAlTiCu.05.25.1543.655.9TypicalMechanicalPropertiesTensileStrength89,500PSI620MPAYieldStrength62,000PSI430MPAElongation35%WeldingParametersStandardPackages:ProcessDiameterVoltageAmperageGasTIG.035”(0.9mm).045”(1.2mm)1/16”(1.6mm)3/32”(2.4mm)1/8”(3.2mm)12-1513-1614-1815-2015-2060-9080-11090-130120-175150-220100%Argon100%Argon100%Argon100%Argon100%ArgonMIG.035”(0.9mm).045”(1.2mm)1/16”(1.6mm)26-2928-3229-33150-190180-220200-25075%Argon+25%Helium75%Argon+25%Helium75%Argon+25%HeliumSAW3/32”(2.4mm)1/8”(3.2mm)5/32”(4.0mm)28-3029-3230-33275-350350-450400-550SuitableFluxmaybeusedSuitableFluxmaybeusedSuitableFluxmaybeusedBaltimore,MD,USA(410)633-9300)