99 Nickel Welding Electrodes, 99 Nickel, 1 8 in dia, 1 lb Pack ORS NASCO visible deformation provides evidence of visible deformation provides evidence of proper closure Deburred edges reduce risk of damage to parts being clamped Provides a degree of elasticity to accommodate changes in size of the parts being joined and for breaking radiator connections They are available in many shapes and angles for ultimate use The thick steel shank ensures the operator with optimal power and the black oxide finish deters rust Designed for welding gray iron castings to themselves as well as joining them to mild steel Can also be used to repair castings A preheat and interpass temperature on at least 350°F is required during welding