Hobart SDX NiCr-3 description: SDX NiCr-3 is a nickel-based alloy solid wire for the submerged arc welding of nickel alloys (such as Inconel 600) and some stainless/low-alloy steels and dissimilar combinations. SDX NiCr-3 provides excellent resistance to corrosion and cracking, even at high temperature. Hobart recommends using this wire with the following flux(es): SWX 282.