Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd First Quality, Sincere Service
Add to Cart
Dynamic Braking Resistor Strip NiCr 80/20, NiCr 70/30, NiCr 60/15, NiCr 35/20 For Electric Element
Common trade names NiCr 70/30, Resistohm 70, Nikrothal 70, Chromel 70/30, HAI-NiCr 70, Cronix 70, Inalloy 70, X30H70.
NiCr 70 30 (Werkstoff Nr 2.4658) is an austenitic Nickel-Chromium alloy for use at temperatures up to 1250°C. The 70/30 alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.
Resistance strip is made of nickel chrome alloys, nickel chrome iron alloys, iron chrome aluminium alloys, copper nickel alloys.
Used in resistor, heater, heating element, sealer, furnace, etc.
NiCr 80/20, NiCr 70/30, NiCr 60/15, NiCr 35/20, SS316L, SS304, SS301,SS201
CrAl 15-5, CrAl 20-5, CrAl 25-5, etc...
Constantan, alloy 30, alloy 60, alloy 90, etc.
Electric resistivity from 0.02 u ohm/m-1.53 ohm mm2/m
Max operating temperature from 200 C to 1400 C
Pls be free to contact us if there is any question.
We will give you best quality and service.
| Alloy Nomenclature/Performance | NiCr8.20 | NiCr70 30 | NiCr60 15 | NiCr35 20 | NiCr30 20 | |
| Main Chemical composition | Ni | Rest | Rest | 55.0-61.0 | 34.0-37.0 | 30.0-34.0 |
| Cr | 20.0-23.0 | 28.0-31.0 | 15.0-18.0 | 18.0-21.0 | 18.0-21.0 | |
| Fe | ≤ 1.0 | ≤ 1.0 | Rest | Rest | Rest | |
| Max. continuous service temp. of element | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Resistivity at 20oC (μ Ω · m) | 1.09 | 1.18 | 1.12 | 1 | 1.04 | |
| Density (g/cm 3 ) | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Thermal conductivity(KJ/m· h· oC) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
| Coefficient of lines expansion(α × 10-6/oC) | 18 | 17 | 17 | 19 | 19 | |
| Melting point (approx. )( oC) | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Elongation at rupture (%) | > 20 | > 20 | > 20 | > 20 | > 20 | |
| Micrographic structure | austenite | austenite | austenite | austenite | austenite | |
| Magnetic properties | nonmagnetic | nonmagnetic | nonmagnetic | Weak magnetic | Weak magnetic | |
NiCr 70-30 is used for corrosion resistant electric heating elements in industrial furnaces with reducing atmospheres. Nickel Chrome 70/30 is highly resistant to oxidation in air. Not recommend for use in MgO sheathed heating elements, or applications using nitrogen or carburizing atmospheres.