Principalele abilități tehnice ale sârmei din aliaj de nichel-crom
Marcă / Performanță
Cr20Ni80
Cr30Ni70
Cr15Ni60
Cr20Ni35
Cr20Ni30
Compoziție chimică principală%
Ni
marjă
marjă
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
marjă
marjă
marjă
Cea mai mare temperatură de utilizare a componentei ℃
1200
1250
1150
1100
1100
Punct de topire ° C
1400
1380
1390
1390
1390
Densitate g / cm3
8.40
8.10
8.20
7.90
7.90
Rezistivitate μΩ · m, 20 ℃
1.09±0.05
1.18±0.05
1.11±0.05
1.04±0.05
1.04±0.05
Elongaţie%
≥20
≥20
≥20
≥20
≥20
Căldură specifică J / g. ℃
0.440
0.461
0.494
0.500
0.500
Conductivitate termică KJ / mh ℃
60.3
45.2
45.2
43.8
43.8
Coeficient de expansiune liniară a × 10-6 / ℃ (20 ～ 1000 ℃)
18.0
17.0
17.0
19.0
19.0
Microstructură
Austenita
Austenita
Austenita
Austenita
Austenita
magnetic
Nemagnetic
Nemagnetic
Nemagnetic
Nemagnetic
Nemagnetic
Parametrii principali de proiectare ai firului de nichel-crom
Diametrul firului
(mm)
Arie a secțiunii transversale
(mm2)
Suprafața pe metru
cm2 / m
Cr20Ni80
Cr30Ni70
Cr15Ni60
Greutate pe metru
kg / m
Rezistența pe metru
Ω/m,20℃
Greutate pe metru
kg / m
Rezistența pe metru
Ω/m,20℃
Greutate pe metru
kg / m
Rezistența pe metru
Ω/m,20℃
0.10
0.007854
3.142
0.00006597
138.8
0.00006362
150.2
0.00006440
142.6
0.12
0.01131
3.770
0.00009500
96.38
0.00009161
104.3
0.00009274
99.03
0.15
0.01767
4.712
0.0001484
61.68
0.0001431
66.77
0.0001449
63.38
0.17
0.02270
5.341
0.0001907
48.02
0.0001839
51.99
0.0001861
49.34
0.19
0.02835
5.969
0.0002382
38.44
0.0002297
41.62
0.0002325
39.50
0.21
0.03464
6.597
0.0002909
31.47
0.0002806
34.07
0.0002840
32.34
0.25
0.04909
7.854
0.0004123
22.21
0.0003976
24.04
0.0004025
22.82
0.27
0.05726
8.482
0.0004809
19.04
0.0004638
20.61
0.0004695
19.56
0.29
0.06605
9.111
0.0005548
16.50
0.0005350
17.86
0.0005416
16.96
0.31
0.07548
9.739
0.0006340
14.44
0.0006114
15.63
0.0006189
14.84
0.35
0.09621
11.00
0.0008082
11.33
0.0007793
12.26
0.0007889
11.64
0.40
0.1257
12.57
0.001056
8.674
0.001018
9.390
0.001030
8.913
0.45
0.1590
14.14
0.001339
6.835
0.001288
7.419
0.001304
7.042
0.50
0.1963
15.71
0.001469
5.551
0.001590
6.010
0.001610
5.704
0.60
0.2827
18.85
0.002375
3.855
0.002290
4.173
0.002318
3.961
0.70
0.3848
21.99
0.003233
2.832
0.003117
3.066
0.003156
2.910
0.80
0.5027
25.13
0.004222
2.168
0.004072
2.348
0.004122
2.228
0.90
0.6362
28.27
0.005344
1.713
0.005153
1.855
0.005217
1.761
1.00
0.7854
31.42
0.006597
1.388
0.006362
1.502
0.006440
1.426
1.20
1.131
37.70
0.009500
0.9638
0.009161
1.043
0.009274
0.9903
1.40
1.539
43.98
0.01293
0.7081
0.01247
0.7665
0.01262
0.7276
1.60
2.011
50.27
0.01689
0.5421
0.01629
0.5869
0.01649
0.5570
1.80
2.545
56.55
0.02138
0.4283
0.02061
0.4637
0.02087
0.4401
2.00
3.142
62.83
0.02639
0.3470
0.02545
0.3756
0.02576
0.3565
2.20
3.801
69.12
0.03139
0.2867
0.03079
0.3104
0.03117
0.2946
2.50
3.976
70.69
0.03340
0.2741
0.03221
0.2968
0.03260
0.2817
2.80
6.158
87.96
0.05172
0.1770
0.04988
0.1916
0.05049
0.1819
3.00
7.069
94.25
0.05938
0.1542
0.05726
0.1669
0.05796
0.1584
3.50
9.621
110.0
0.08082
0.1133
0.07793
0.1226
0.07889
0.1164
4.00
12.57
125.7
0.1056
0.08674
0.1018
0.09390
0.1030
0.08913
4.50
15.90
141.4
0.1336
0.06853
0.1288
0.07419
0.1304
0.07042
5.00
19.63
157.1
0.1649
0.05551
0.1590
0.06010
0.1610
0.05704
5.50
23.76
172.8
0.1996
0.04588
0.1924
0.04967
0.1948
0.04714
6.00
28.27
188.5
0.2375
0.03855
0.2290
0.04173
0.2318
0.03961
6.50
33.18
204.2
0.2787
0.03285
0.2688
0.03556
0.2721
0.03375
7.00
38.48
219.9
0.3233
0.02832
0.3117
0.03066
0.3156
0.02910
