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RAIL®-NC80/20 (Brightray® Alloy S) Strip is an austenitic, non-magnetic Nickel-Chrome alloy. It is used at strip temperature up to 1200◦C.
RAIL®-NC80/20 (Brightray® Alloy S) strip has outstanding characteristics like high uniform electric resistance, excellent heat stability, strong resistance to corrosion, excellent ductility, weldability and mechanical stability. Its austenitic structure gives good toughness allowing it to be easily cold worked. It is an ideal metallic heating element material for use in high temperature industrial furnaces and electric domestic heating equipment.
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Physical, Electrical & Mechanical Properties
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Maximum element working temperature (in air)
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1200◦C |
| Nominal composition % |
|
|
Cr |
20 |
|
Si |
1 |
|
Fe |
1 (Max) |
|
Mn |
0.4 |
|
Ni |
Balance |
| Density g/cm3 |
8.43 |
| Electrical Resistivity at 20 ◦ C Ohms rinn2/m |
1.10 |
| Elongation % |
Min 30 |
| Melting temperature |
1400 |
| Tensile Strength kgs/mm2 |
70 |
| Creep limit (1% elongation after 1000 hours) |
8.16 |
|
Kg/ mm2 - 600◦C |
8.16 |
|
Kg/ mm2 - 800 ◦C |
1.53 |
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Kg/ mm2 - 1000◦C |
0.408 |
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Kg/ mm2 - 1200◦C |
0.051 |
| Workability |
Good
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| Weldability |
Satisfactory |
| Magnetic Property |
Non-Magnetic |
Resistance values are at 20◦C & for values at working temperature,
multiply by the
factor Ct from the table.
| ◦C |
20 |
100
|
200
|
300
|
400
|
500
|
600
|
700
|
800
|
900
|
1000
|
1100
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| Ct |
1.000 |
1.005
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1.012
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1.020
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1.027
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1.032
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1.026
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1.020
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1.019
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1.022
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1.035
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1.050
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