Precision Resistors Wire Copper Nickel Alloy for Precision Resistors / Foil Resistors
Product Description
Constantan and Manganin is a copper-nickel alloy that contains specific minor amounts of additional elements to achieve precise values for the temperature coefficient of resistivity. Careful control of melting and conversion practices results in a very low level of pinholes at ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges.
Constantan
Chemical Content, %
Ni | Mn | Fe | Si | Cu | Other | ROHS Directive | |||
Cd | Pb | Hg | Cr | ||||||
44 | 1.50% | 0.5 | - | Bal | - | ND | ND | ND | ND |
Mechanical Properties
Max Continuous Service Temp | 400 |
Resisivity at 20 | 0.49±5%ohm mm2/m |
Density | 8.9 g/cm3 |
Thermal Conductivity | -6(Max) |
Melting Point | 1280 |
Tensile Strength,N/mm2 Annealed,Soft | 340~535 Mpa |
Tensile Strength,N/mm3 Cold Rolled | 680~1070 Mpa |
Elongation(anneal) | 25%(Min) |
Elongation(cold rolled) | ≥Min)2%(Min) |
EMF vs Cu, μV/ºC (0~100ºC) | -43 |
Micrographic Structure | austenite |
Magnetic Property | Non |
Manganin
Chemical Content, %
Ni | Mn | Fe | Si | Cu | Other | ROHS Directive | |||
Cd | Pb | Hg | Cr | ||||||
2~5 | 11~13 | <0.5 | micro | Bal | - | ND | ND | ND | ND |
Mechanical Properties
Max Continuous Service Temp | 0-100 |
Resisivity at 20 | 0.44±0.04ohm mm2/m |
Density | 8.4 g/cm3 |
Thermal Conductivity | 40 KJ/m·h· |
Temp Coefficient of Resistance at 20 ºC | 0~40α×10-6/ºC |
Melting Point | 1450 |
Tensile Strength(Hard) | 585 Mpa(min) |
Tensile Strength,N/mm2 Annealed,Soft | 390-535 |
Elongation | 6~15% |
EMF vs Cu, μV/ºC (0~100ºC) | 2(max) |
Micrographic Structure | austenite |
Magnetic Property | non |
Hardness | 200-260HB |
Micrographic Structure | Ferrite |
Magnetic Property | Magnetic |
Resistance Alloy- Constantan Sizes / Temper Capabilities
- Condition: Bright, Annealed, Soft
- Wire diameter 0.02mm-1.0mm packing in spool, big than 1.0mm packing in coil<
