This product is a nickel-copper corrosion-resistant alloy cold-rolled/hot-rolled steel coil, conforming to US UNS N04400 and ASTM B127/ASME SB-127 standards. The nominal composition is Ni ≥ 63%, Cu 28~34%, Fe ≤ 2.5%. The alloy is a single-phase austenitic solid solution with a density of 8.83 g/cm³, a melting point of 1300~1350°C, an annealed tensile strength ≥ 485 MPa, a yield strength ≥ 195 MPa, and an elongation ≥ 35%. It exhibits excellent corrosion resistance in seawater, hydrofluoric acid, hot concentrated alkalis, reducing acids, and various organic media, with no tendency for stress corrosion. The operating temperature range is -184°C to 260°C, and it is widely used in marine engineering, chemical equipment, oil extraction, and the nuclear industry.