Vascomax� 300, Maraging C300 Maraging 300� (also referred to as Maraging C300� and Vascomax C300� is a vacuum induction melted plus vacuum arc re-melted, low-carbon, nickel-cobalt-molybdenum high temperature alloy capable of attaining yield strengths in excess of 270 ksi (1862 MPa) through simple, low temperature heat treatment at 900�F (482�C). Maraging C300� exhibits good ductility at high strength levels. Maraging C-300� also displays excellent notch ductility and is readily welded. Maraging 300� is one of a family of "maraging" nickel steels such as Maraging 250� & Maraging 350� which are martensitic yet ductile in the solution treated condition and attain ultra-high strength through a single low temperature aging treatment. Available forms are seamless pipe, welded pipe, seamless tube, welded tube, bar, wire, sheet, plate, forgings, pipe fittings and flanges.