Cr20Ni35镍铬/镍铬铁电热合金具有高电阻率、良好抗氧化性能、高温强度、成形性能和焊接性能，适用于冶金设备、家用电器、机械设备中的发热元件和电阻元件。
材料在高温环境下具备良好的组织稳定性和加工成形性，可用于圆丝、扁丝、带材等多种电热元件形式。
镍铬合金技术参数
|
性能/类型 |
Cr20Ni80 |
Cr30Ni70 |
Cr15Ni60 |
Cr20Ni35 |
Cr20Ni30 |
|
|
主要成分(%) |
Ni |
余量Bal |
REST |
55.0~61.0 |
34.0~37.0 |
30.0~34.0 |
|
Cr |
22.0~23.0 |
28.0~31.0 |
15.0~18.0 |
18.0~21.0 |
18.0~21.0 |
|
|
Fe |
≤1.0 |
≤1.0 |
余量Bal |
余量Bal |
REST |
|
|
最高连续使用温度(℃) |
1200 |
1100 |
1000 |
1000 |
1000 |
|
|
熔点(℃) |
1400 |
1380 |
1390 |
1390 |
1390 |
|
|
Density(g/cm3) |
8.4 |
8.1 |
8.2 |
7.9 |
7.9 |
|
|
Resistivity(µΩ.m,20℃) |
1.09±0.05 |
1.18±0.05 |
1.11±0.05 |
1.04±0.05 |
1.04±0.05 |
|
|
Elongation(%) |
≥20 |
≥20 |
≥20 |
≥20 |
≥20 |
|
|
Specific heat capacity at 20℃(J/g.℃) |
0.44 |
0.461 |
0.494 |
0.5 |
0.5 |
|
|
Thermal conductivity(kJ/m.h℃) |
60.3 |
45.2 |
45.2 |
43.8 |
43.8 |
|
|
Line expansion coefficient(a×10-6/℃(20~1000℃)) |
18 |
17 |
17 |
19 |
19 |
|
|
Micro structure |
Austenite |
Austenite |
Austenite |
Austenite |
Austenite |
|
|
Magnetic properties |
Non-magnetic |
Non-magnetic |
Non-magnetic |
Non-magnetic |
Non-magnetic |
|
镍铬圆丝直径及性能参数
|
mm |
mm² |
cm²/m |
Cr20Ni80 |
Cr15Ni60 |
Cr20Ni35,CrNi30 |
|||
|
kg/m |
Ω/m,20℃ |
kg/m |
Ω/m,20℃ |
kg/m |
Ω/m,20℃ |
|||
|
0.1 |
0.007854 |
3.142 |
0.00006597 |
138.8 |
0.0000644 |
142.6 |
0.0000616 |
132.4 |
|
0.12 |
0.01131 |
3.77 |
0.000095 |
96.38 |
0.00009274 |
99.03 |
0.0000892 |
91.96 |
|
0.15 |
0.01767 |
4.712 |
0.0001484 |
61.68 |
0.0001449 |
63.38 |
0.00014 |
58.85 |
|
0.17 |
0.0227 |
5.341 |
0.0001907 |
48.02 |
0.0001861 |
49.34 |
0.000179 |
45.82 |
|
0.19 |
0.02835 |
5.969 |
0.0002382 |
38.44 |
0.0002325 |
39.5 |
0.000224 |
36.86 |
|
0.21 |
0.03464 |
6.597 |
0.0002909 |
31.47 |
0.000284 |
32.34 |
0.0003 |
27.36 |
|
0.25 |
0.04909 |
7.854 |
0.0004809 |
22.21 |
0.0004025 |
22.82 |
0.000388 |
21.19 |
|
0.27 |
0.05726 |
8.482 |
0.0005548 |
19.04 |
0.0004695 |
19.56 |
0.000487 |
16.89 |
|
0.29 |
0.06605 |
9.111 |
0.0004809 |
16.5 |
0.0005416 |
16.96 |
0.000558 |
14.71 |
|
0.31 |
0.07548 |
9.739 |
0.000634 |
14.44 |
0.0006189 |
14.84 |
0.000635 |
12.93 |
|
0.35 |
0.09621 |
11 |
0.0008082 |
11.33 |
0.0007889 |
11.64 |
0.00076 |
10.81 |
|
0.4 |
0.1257 |
12.57 |
0.001056 |
8.674 |
0.00103 |
8.913 |
0.000993 |
8.276 |
|
0.45 |
0.159 |
14.14 |
0.001339 |
6.835 |
0.001304 |
7.042 |
0.00126 |
6.539 |
|
0.5 |
0.1963 |
15.71 |
0.001469 |
5.551 |
0.00161 |
5.704 |
0.00155 |
5.297 |
|
0.6 |
0.2827 |
18.85 |
0.002375 |
3.855 |
0.002318 |
3.961 |
0.00224 |
3.749 |
|
0.7 |
0.3848 |
21.99 |
0.003233 |
2.832 |
0.003156 |
2.91 |
0.00304 |
2.754 |
|
0.8 |
0.5027 |
25.13 |
0.004222 |
2.168 |
0.004122 |
2.228 |
0.00397 |
2.109 |
|
0.9 |
0.6362 |
28.27 |
0.005344 |
1.713 |
0.005217 |
1.761 |
0.00503 |
1.666 |
|
1.00 |
0.7854 |
31.42 |
0.006597 |
1.388 |
0.00644 |
1.426 |
0.0062 |
1.35 |
|
1.20 |
1.131 |
37.7 |
0.0095 |
0.9638 |
0.009274 |
0.9903 |
0.00894 |
0.9196 |
|
1.40 |
1.539 |
43.98 |
0.01293 |
0.7081 |
0.01262 |
0.7276 |
0.01216 |
0.6756 |
|
1.60 |
2.011 |
50.27 |
0.01689 |
0.5421 |
0.1649 |
0.557 |
0.01588 |
0.5173 |
|
1.80 |
2.545 |
56.55 |
0.02138 |
0.4283 |
0.02087 |
0.4401 |
0.02006 |
0.4087 |
|
2.00 |
3.142 |
62.83 |
0.02639 |
0.347 |
0.02576 |
0.3565 |
0.02408 |
0.331 |
|
2.20 |
3.801 |
69.12 |
0.03139 |
0.2867 |
0.03117 |
0.2946 |
0.03002 |
0.2736 |
|
2.50 |
3.976 |
70.69 |
0.0334 |
0.2741 |
0.0326 |
0.2817 |
0.04195 |
0.2109 |
|
2.80 |
6.158 |
87.96 |
0.05172 |
0.177 |
0.05049 |
0.1819 |
0.04866 |
0.1689 |
|
3.00 |
7.069 |
94.25 |
0.05938 |
0.1542 |
0.05796 |
0.1584 |
0.05587 |
0.1471 |
|
3.50 |
9.621 |
110 |
0.08082 |
0.1133 |
0.07889 |
0.1164 |
0.07599 |
0.1081 |
|
4.00 |
12.57 |
125.7 |
0.1056 |
0.08674 |
0.103 |
0.08913 |
0.0993 |
0.08276 |
|
4.50 |
15.9 |
141.4 |
0.1336 |
0.06853 |
0.1304 |
0.07042 |
0.1256 |
0.06539 |
|
5.00 |
19.63 |
157.1 |
0.1649 |
0.05551 |
0.161 |
0.05704 |
0.1551 |
0.05297 |
|
5.50 |
23.76 |
172.8 |
0.1996 |
0.04588 |
0.1948 |
0.04714 |
0.188 |
0.04462 |
|
6.00 |
28.27 |
188.5 |
0.2375 |
0.03855 |
0.2318 |
0.03961 |
0.2236 |
0.03749 |
|
6.50 |
33.18 |
204.2 |
0.2787 |
0.03285 |
0.2721 |
0.03375 |
0.2623 |
0.03194 |
|
7.00 |
38.48 |
219.9 |
0.3233 |
0.02832 |
0.3156 |
0.0291 |
0.3041 |
0.02754 |