Nickel Chromium Alloy
PHYSICAL AND MECHANICAL PROPERTIES
| Resistalloy Nickel - Chromium Alloy | Resistalloy 8020 | Resistalloy 6015 | Resistalloy 3718 |
| Form
Maximum Operating Temperature |
Wire Strip |
Wire Strip |
Wire Strip Bar |
| (element temperature in air) (C (F Nominal composition % Cr |
1200 2190 20 |
1150 2100 15 |
1100 2010 20 |
| Density, g/cm3 lb/in3 Electrical Resistivity at 20oC Ω mm2m-1 at 68oF Ω /cmf Temperature factor of the resistivity, oC 800oC - 1470oC 1000oC - 1830oC 1200oC - 2190oC |
8.3 0.300 1.09 655 1.04 1.05 1.07 |
8.2 0.296 1.11 668 1.10 1.11 1.13 |
7.9 0.285 1.04 626 1.21 1.23 - |
| Coefficiency of thermal expansion, K1 20 - 250oC 68 - 480oF 20 - 500oC 68 - 930oF 20 - 750oC 68 - 1380oF 20 - 1000oC 68 - 1830oF |
15. 10-6 16. 10-6 17. 10-6 18. 10-6 |
14. 10-6 15. 10-6 16. 10-6 17. 10-6 |
16. 10-6 17. 10-6 18. 10-6 19. 10-6 |
| Thermal conductivity at 20oC Wm1 K1 68oF/Bru in ft4h4F4 |
15 104 |
13 90 |
1390 |
| Specific heat capacity, kJ kg1K8,20oC/ Bru lb1,68F |
0.46 0.110 |
0.46 0.110 |
0.50 0119 |
| Melting Point (approx) oC, oF | 1400 2550 | 1390 2535 | 1390 2535 |
| Mechanical properties (approx) Tensile strength, N mm2 tsi Yield point, N mm2 rsi Hardness (approx) Hv Elongation at failure (on 50mm) % Tensile strength at 900oC N/mm2 1650oF, tsi Creep strength at 800oC N/mm2 at 1470oF tsi at 1000oC N/mm2 at 1830oF tsi Magnetic properties |
750 48.5 450 29.0 180 25/30 100 6.47 15 0.96 4. 026 Non magnetic |
750 48.5 450 29.0 180 25/30 100 6.47 15 0.96 4. 026 Slightly Magnetic |
750 48.5 450 29.0 180 25/30 100 6.47 20 1.28 4. 026 Non Magnetic |
| Emissivity, E,fully oxidised condition | 0.88 | 0.88 | 0.88 |
NB. Finer Wires less than 1.0mm diameter will exhibit up to 10% higher tensile strength and sizes above 5.0mm diameter, slightly lower strength.
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