Ni70cr30 Belt for Double Strip Coils Braking Resistor
Ni70cr30 Belt for Double Strip Coils Braking Resistor
Ni70Cr30 is a nickel-chromium alloy (NiCr alloy) characterized by high resistivity, good oxidation resistance and very good form stability. It is suitable for use at temperatures up to 1250°C,and hold a superior service life compared to Iron chromium alumium alloys.
Typical applications for Ni70Cr30 are electric heating elements in home appliances,industrial furnaces and resistors(wirewound resistors,metal film resistors), flat irons, ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular elements and cartridge elements.
Normal composition%
C |
P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| Max | |||||||||
| 0.03 | 0.02 | 0.015 | 0.60 | 0.75~1.60 | 28.0~31.0 | Bal. | Max 0.50 | Max 1.0 | - |
Typical Physical properties
Density (g/cm3) |
8.1 |
| Electrical resistivity at 20ºC(mm2/m) | 1.18 |
| Coefficient of thermal expansion | |
| Temperature | Coefficient of Thermal Expansion x10-6/ºC |
| 20 ºC- 1000ºC | 17 |
| Specific heat capacity | |
| Temperature | 20ºC |
| J/gK | 0.46 |
| Melting point (ºC) | 1380 |
| Max continuous operating temperature in air (ºC) | 1250 |
| Magnetic properties | non-magnetic |
| Temperature Factors Of Electrical Resistivity | |||||
| 20ºC | 100ºC | 200ºC | 300ºC | 400ºC | 600ºC |
| 1 | 1.006 | 1.012 | 1.018 | 1.025 | 1.018 |
| 700ºC | 800ºC | 900ºC | 1000ºC | 1100ºC | 1300ºC |
| 1.01 | 1.008 | 1.01 | 1.014 | 1.021 | - |
Style of supply
| Alloys Name | Type | Dimension | ||
| Ni70Cr30W | Wire | D=0.03mm~8mm | ||
| Ni70Cr30R | Ribbon | W=0.4~40 | T=0.03~2.9mm | |
| Ni70Cr30S | Strip | W=8~250mm | T=0.1~3.0 | |
| Ni70Cr30F | Foil | W=6~120mm | T=0.003~0.1 | |
| Ni70Cr30B | Bar | Dia=8~100mm | L=50~1000 | |
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