N6 | Chromel C, Ni 60, N6, HAI-NiCr 60, Tophet C, Resistohm 60, Cronifer II, |
Electroloy, Nichrome, Alloy C, Ni 6, MWS-675, Stablohm 675 | |
N7 | Ni 70, Chromel 70/30, N7, Hytemco, HAI-NiCr 70, Balco, Tophet 30, |
Resistohm 70, Cronix 70, Stablohm 710 | |
N8 | Chromel A, Ni 80, N8, Nichrome V, HAI-NiCr 80, Tophet A, Resistohm |
80, Cronix 80, Protoloy, Ni 8, Alloy A, MWS-650, Stablohm 650 |
Description
Alloy |
Standard Strand Construction, mm |
Resistance,Ω/m |
Strand Diameter Nominal, mm |
Meter per Kilo |
NiCr 80/20 |
18×0.544+1×0.574 |
0.252-0.278 |
2.67 |
26 |
NiCr 80/20 |
19×0.61 |
0.205-0.250 |
3.05 |
|
NiCr 80/20 |
18×0.523+1×0.574 |
0.271-0.299 |
2.67 |
30 |
NiCr 80/20 |
19×0.574 |
0.227-0.251 |
2.87 |
25 |
NiCr 80/20 |
36×0.385+1×0.45 |
0.265-0.293 |
2.76 |
26 |
NiCr 60/15 |
19×0.508 |
0.286-0.318 |
2.54 |
|
NiCr 60/15 |
18×0.523+1×0.574 |
0.276-0.305 |
2.76 |
30 |
Ni |
19×0.574 |
0.019-0.021 |
2.87 |
21 |
Details
Propertes/Grade | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
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 | 1.04 | 1.04 | |
Density (g/cm3) | 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 | nonmagnetic | nonmagnetic |