P:\P25065\H-# Literature\H-2082 - Haynes International, Inc.

WELD OVERLAYULTIMET alloy is an ideal weldoverlay material. Not onlydoes it provide corrosion andwear protection to criticalsurfaces, it is very easy toapply compared with thetraditional cobalt-basehardfacing alloys. This easeof application stems from itsrelatively high ductility.ULTIMET alloy may be appliedin multiple layers with little orno preheat. Deposit crackingdoes not occur under mostcircumstances.Weld overlays of ULTIMETalloy have been applied by gastungsten arc, gas metal arc,shielded metal arc, submergedarc and plasma transferred arcwelding techniques.Oxyacetylene process is notrecommended. For submergedarc welding, LincolnBlue-Max 2000 flux is recommended.Postweld Heat TreatmentUnder most conditions, thepostweld heat treatment ofULTIMET weld deposits is notrequired. If bending or coldformingof the deposits isnecessary, an annealingtreatment at 2050°F (1121°C),followed by water quenching,may be required depending onthe bend radius. The effectsof annealing on the substratematerial should be considered.Stress-relief heat treatments inthe temperature range of 1100to 1200°F (593 to 649°C) donot markedly affect the propertiesof ULTIMET weld overlays.For further information,please consult Haynes publicationH-2089 and H-2099.Cruciform Test For Weld Cracking Sensitivity (Coated Electrodes)STELLITE 1Hot cracked at 1st layer(stopped after 16 beads)STELLITE 6Hot cracked at 3rd layer(stopped after 24 beads)ULTIMET ® alloyNo observed cracking(Total of 160 beads)17ULTIMET ® alloy