Monel400(UNS N04400/W.Nr. 2.4360) Alloy400 is a solid-solution alloy that can be hardened only cold working. It has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments. Chemical Composition(%) Ni(plus Cobalt)................63.0 C..............................0.3 Mn.............................2.0 Fe.............................2.5 S............................0.024 Si.............................0.5 Cu..........................28.0-34.0 Physical Constants(room temperature): Density,(g/cm3)8.80 Melting Range1300-1350 Specific Heat,(J/kg) 427 Electrical Resistivity,(m) 0.511.