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Nichrome resistance heating alloys

Nichrome resistance heating alloys
High-resistance electrical heating alloys:

High-resistance electrical heating alloys, such as drawing (or rolling) NiCr (NiCrFe, FeCrAl) wires (strips, bars, or wire coils), are used as made into electrical heating elements and general resistance elements.

¤ Chemical constitutions:

Alloy material
Chemical composition %
C
P
S
Mn
Si
Cr
Ni
Al
Fe
others
Not more than(≤)
Cr20Ni80
0.08
0.020
0.015
0.60
0.75~1.60
20.0~23.0
Residual
≤0.50
≤1.0
Cr30Ni70
0.08
0.020
0.015
0.60
0.75~1.60
28.0~31.0
Residual
≤0.50
≤1.0
Cr15Ni60
0.08
0.020
0.015
0.60
0.75~1.60
15.0~18.0
55.0~61.0
≤0.50
Residual
Cr20Ni35
0.08
0.020
0.015
1.00
1.00~3.00
18.0~21.0
34.0~37.0
Residual
Cr20Ni30
0.08
0.020
0.015
1.00
1.00~2.00
18.0~21.0
30.0~34.0
Residual
1Cr13Al4
0.12
0.025
0.025
0.70
≤1.00
12.0~15.0
4.0~6.0
Residual
0Cr25Al5
0.06
0.025
0.025
0.70
≤0.60
23.0~26.0
≤0.60
4.5~6.5
Residual
0Cr23Al5
0.06
0.025
0.025
0.70
≤0.60
20.5~23.5
≤0.60
4.2~5.3
Residual
0Cr21Al6
0.06
0.025
0.025
0.70
≤1.00
19.0~22.0
≤0.60
5.0~7.0
Residual
1Cr20Al3
0.06
0.025
0.025
0.70
≤1.00
18.0~21.0
≤0.60
3.0~4.2
Residual
0Cr21Al6Nb
0.05
0.025
0.025
0.70
≤0.60
21.0~23.0
≤0.60
5.0~7.0
Residual
Nb additions0.5
0Cr27Al7Mo2
0.05
0.025
0.025
0.20
≤0.40
26.5~27.8
≤0.60
6.0~7.0
Residual

Mo additions 1.8~2.2

¤ Resistivity of soft wires:
Alloy material
Diameter(mm)
Resistivity(μΩm)(20℃)
Cr20Ni80
<0.50
0.50~3.00
>3.00
1.09±0.05
1.13±0.05
1.14±0.05
Cr30Ni70
<0.50
≥0.50
1.18±0.05
1.20±0.05
Cr15Ni60
<0.50
≥0.50
1.12±0.05
1.15±0.05
Cr20Ni35
Cr20Ni30 <0.50
≥0.50
1.04±0.05
1.06±0.05
1Cr13Al4
0Cr25Al5
0Cr23Al5
0Cr21Al6
1Cr20Al3
0Cr21Al6Nb
0.03~8.00
1.25±0.08
1.42±0.07
1.35±0.06
1.42±0.07
1.23±0.06
1.45±0.07
0Cr27Al7Mo2
0.03~8.00
1.53±0.07
¤ Specification: mm
Wires
Paint-coated(uncoated) wires
Uncoated wires
Diameter
0.02~1.2
Diameter
>0.02~6.0
Sheet, strip
Thickness
0.05~3.5
Width
6~100
Flat wires
Thickness
0.08~0.8
Width
0.2~10.0
¤ Resistivity of strip materials:
Alloy material
Diameter(mm)
Resistivity(μΩm)20℃
Cr20Ni80
≤0.80
>0.80~3.00
>3.00
1.09±0.05
1.13±0.05
1.14±0.05
Cr30Ni70
≤0.80
>0.80~3.00
>3.00
1.18±0.05
1.19±0.05
1.20±0.05
Cr15Ni60
≤0.80
>0.80~3.00
>3.00
1.11±0.05
1.14±0.05
1.15±0.05
Cr20Ni35
Cr20Ni30
<0.80
≥0.80
1.04±0.05
1.06±0.05
1Cr13Al4
0Cr25Al5
0Cr23Al5
0Cr21Al6
1Cr20Al3
0Cr21Al6Nb
0Cr27Al7Mo2
0.05~3.50
1.25±0.08
1.42±0.07
1.35±0.07
1.42±0.07
1.23±0.07
1.45±0.07
1.53±0.07

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