Metrode Nimrod-C276 description: The weld deposit composition matches parent alloy C276 with Ni-15%Cr-16%Mo-4%W-5%Fe. Carbon and silicon are controlled as close as possible to the very low levels of the wrought alloy to minimise carbide and intermetallic phase precipitates which can reduce as-welded corrosion resistance. Cast versions of the alloy typically have higher carbon and silicon (like the original wrought Hastelloy alloy C, now obsolete), but repair welds are usually solution treated for optimum corrosion resistance.