THIS IS A DUAL SHIELD CORED WIRE Nickel 55 (ENiFe-Cl) welding electrode is designed for welding gray iron castings to themselves as well as joining them to mild steel. It can also be used to repair castings. The welds are moderately hard and require carbide tipped tools for post weld machining. A preheat and interpass temperature of not less than 350ºF is recommended during welding. AWS Specification AWS A5.15-90 (R2006) AWS Classification ENiFe-Cl Welding CurrentDCEP Typical Wire Chemistry C 2.0 Mn 2.5 Si 4.0 S 0.03 Fe REM Ni 45 - 60 Cu 2.5 Al 1.0 OTHER 1.0 Typical Mechanical Properties (As Welded) Yield Strength, ksi 43 - 63 Tensile Strength, ksi 58 - 84 Elongation%, min 6 - 8 Welding PositionsF,V,OH,H Available Diameters and Operating Range in Amps 3/32" 70 - 90 1/8" 100 - 135 5/32" 130 - 180 3/16" 190 - 220 ERNiFe-CI (aka ERNI55) is a filler metal used for TIG and MIG welding of cast iron. It is also used to repair castings. The weld metal of ERNI55 is harder than that of ERNI99. A preheat and interpass temperature of 350 deg F minimum is recommended during welding, without which the weld and heat affected zones may develop cracks. Yield strength 62kpsiTensile strength 89kpsiElongation %, min 35 Product requires a shielding gas