Hangzhou Ualloy Material Co.,Ltd is one of the best copper nickel alloy cuni19 manufacturers and suppliers in China,Website:://.alloystrip.com, welcome to buy discount and low price nc25B from us, and also welcome to check the price and quotation with our factory. CuNi19 (Common Name:CuNi19,NC25) CuNi19 is a copper-nickel alloy (Cu81Ni19 alloy) with low resistivity for use at temperatures up to 300°C. CuNi19 is kind of low resistance heating alloy.It is one of the key materials of the low-voltage electrical products. It is widely used in low-voltage circuit breaker, electric blankets.thermal overload relay, and other low-voltage electrical product. CuNi19 is typically used for low-temperature applications such as heating cables. Normal composition% Nickel 19 Manganese 0.5 Copper Bal. Typical Mechanical properties（1.0mm） Yield strength Tensile Strength Elongation Mpa Mpa % 155 340 25 Typical Physical properties Density (g/cm3) 8.9 Electrical resistivity at 20℃ (Ωmm2/m) 0.25 Temperature factor of resistivity（20℃~600℃）X10-5/℃ <25 Conductivity coefficient at 20℃ (WmK) 38 EMF vs Cu(μV/℃ )(0~100℃ ) -32 Coefficient of thermal expansion Temperature Thermal Expansion x10-6/K 20 ℃- 400℃ 17.5 Specific heat capacity Temperature 20℃ J/gK 0.380 Melting point (℃) 1135 Max continuous operating temperature in air (℃) 300 Magnetic properties non-magnetic Corrosion resistance performance Alloys Working In atmosphere at 20℃ Working at max temperature 200℃ Air and oxygen contain gases gases with Nitrogen gases with sulfur oxidability gases with sulfur reductibility carburization CuNi19 good general general general bad good Style of supply Alloys Name Type Dimension CuNi19W Wire D=0.06mm~8mm CuNi19R Ribbon W=0.4~40 T=0.05~2.9mm CuNi19S Strip W=8~200mm T=0.1~3.0 CuNi19F Foil W=6~120mm T=0.005~0.1 CuNi19B Bar Dia=8~100mm L=50~1000