| High-resistance electrical heating alloys： |
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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.
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¤ Chemical constitutions:
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Alloy material
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Chemical composition %
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C
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P
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S
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Mn
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Si
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Cr
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Ni
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Al
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Fe
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others
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Not more than(≤)
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Cr20Ni80
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0.08
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0.020
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0.015
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0.60
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0.75～1.60
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20.0～23.0
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Residual
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≤0.50
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≤1.0
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—
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Cr30Ni70
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0.08
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0.020
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0.015
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0.60
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0.75～1.60
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28.0～31.0
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Residual
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≤0.50
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≤1.0
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—
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Cr15Ni60
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0.08
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0.020
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0.015
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0.60
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0.75～1.60
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15.0～18.0
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55.0～61.0
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≤0.50
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Residual
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—
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Cr20Ni35
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0.08
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0.020
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0.015
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1.00
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1.00～3.00
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18.0～21.0
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34.0～37.0
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—
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Residual
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—
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Cr20Ni30
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0.08
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0.020
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0.015
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1.00
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1.00～2.00
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18.0～21.0
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30.0～34.0
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—
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Residual
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—
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1Cr13Al4
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0.12
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0.025
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0.025
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0.70
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≤1.00
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12.0～15.0
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—
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4.0～6.0
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Residual
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—
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0Cr25Al5
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0.06
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0.025
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0.025
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0.70
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≤0.60
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23.0～26.0
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≤0.60
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4.5～6.5
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Residual
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—
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0Cr23Al5
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0.06
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0.025
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0.025
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0.70
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≤0.60
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20.5～23.5
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≤0.60
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4.2～5.3
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Residual
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—
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0Cr21Al6
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0.06
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0.025
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0.025
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0.70
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≤1.00
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19.0～22.0
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≤0.60
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5.0～7.0
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Residual
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—
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1Cr20Al3
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0.06
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0.025
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0.025
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0.70
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≤1.00
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18.0～21.0
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≤0.60
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3.0～4.2
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Residual
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—
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0Cr21Al6Nb
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0.05
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0.025
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0.025
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0.70
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≤0.60
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21.0～23.0
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≤0.60
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5.0～7.0
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Residual
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Nb additions0.5
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0Cr27Al7Mo2
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0.05
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0.025
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0.025
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0.20
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≤0.40
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26.5～27.8
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≤0.60
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6.0～7.0
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Residual
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| ¤ Resistivity of soft wires: |
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Alloy material
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Diameter(mm)
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Resistivity(μΩm)(20℃)
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Cr20Ni80
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＜0.50
0.50～3.00
＞3.00
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1.09±0.05
1.13±0.05
1.14±0.05
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Cr30Ni70
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＜0.50
≥0.50
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1.18±0.05
1.20±0.05
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Cr15Ni60
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＜0.50
≥0.50
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1.12±0.05
1.15±0.05
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Cr20Ni35
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Cr20Ni30 ＜0.50
≥0.50
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1.04±0.05
1.06±0.05
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1Cr13Al4
0Cr25Al5
0Cr23Al5
0Cr21Al6
1Cr20Al3
0Cr21Al6Nb
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0.03～8.00
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1.25±0.08
1.42±0.07
1.35±0.06
1.42±0.07
1.23±0.06
1.45±0.07
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0Cr27Al7Mo2
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0.03～8.00
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1.53±0.07
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| ¤ Specification: mm |
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Wires
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Paint-coated(uncoated) wires
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Uncoated wires
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Diameter
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0.02～1.2
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Diameter
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>0.02～6.0
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Sheet, strip
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Thickness
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0.05～3.5
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Width
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6～100
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Flat wires
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Thickness
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0.08～0.8
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Width
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0.2～10.0
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| ¤ Resistivity of strip materials: |
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Alloy material
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Diameter(mm)
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Resistivity(μΩm)20℃
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Cr20Ni80
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≤0.80
＞0.80～3.00
＞3.00
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1.09±0.05
1.13±0.05
1.14±0.05
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Cr30Ni70
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≤0.80
＞0.80～3.00
＞3.00
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1.18±0.05
1.19±0.05
1.20±0.05
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Cr15Ni60
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≤0.80
＞0.80～3.00
＞3.00
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1.11±0.05
1.14±0.05
1.15±0.05
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Cr20Ni35
Cr20Ni30
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＜0.80
≥0.80
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1.04±0.05
1.06±0.05
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1Cr13Al4
0Cr25Al5
0Cr23Al5
0Cr21Al6
1Cr20Al3
0Cr21Al6Nb
0Cr27Al7Mo2
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0.05～3.50
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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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