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 PRODUCT>HEATING ELEMENT |
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Ni-Cr and Ni-Cr-Fe electric heating alloys |
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Main Performance of Ni-Cr and Ni-Cr-Fe electric heating alloys
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Cr20Ni80
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Cr30Ni70
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Cr15Ni60
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Cr20Ni35
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Cr20Ni30
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Main
chemical
Composition
％
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Ni
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Rest
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Rest
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55.0-61.0
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34.0-37.0
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30.0-34.0
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?
Cr
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20.0-23.0
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28.0-31.0
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15.0-18.0
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18.0-21.0
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18.0-21.0
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?
Fe
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≤1.0
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≤1.0
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Rest
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Rest
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Rest
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Max.continuous
service temp.of
element (℃)
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1200
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1250
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1150
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1100
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1100
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Melting point
(approx.) ℃
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1400
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1380
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1390
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1390
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1390
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Density
g/cm3
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8.40
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8.10
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8.20
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7.90
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7.90
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Resistivity
μΩ.m,20℃
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1.09
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1.18
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1.12
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???
1.0
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???
1.04
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Elongation
%
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≥20
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≥20
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≥20
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≥20
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≥20
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Thermal
conductivity
KJ/m.h.℃
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60.3
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45.2
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45.2
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43.8
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43.8
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Coefficient
of linear
expansion
α×10-6/℃
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18.0
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17.0
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17.0
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19.0
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19.0
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Micrographic
structure
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austenite
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austenite
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austenite
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austenite
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austenite
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Magnetic
properties
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non
magnetic
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non
magnetic
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non
magnetic
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weak
magnetic
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weak
magnetic
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