logo.gif (5139 bytes) Nickel Clad Copper and

Copper Clad Nickel-Iron Alloy (Dumet)


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Nickel Clad Copper Temperature (F) Resistance  ( ohms per cir. mil ft. )
27% nickel clad copper was developed for use in applications where high temperatures, oxidizing, or corrosive atmospheres exist. It has electrical conductivity approximately 70% that of copper and is produced in sizes 20 AWG and finer.

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100 15.0
200 18.2
300 21.0
400 23.8
500 26.9
600 29.8
700 32.5
800 35.9
900 39.0
1000 42.3
1100 45.8
1200 49.3
1300 53.0
1400 57.5

Copper Clad Nickel-Iron Alloy (Dumet) Typical Chemical Composition
Dumet is a copper clad nickel-iron alloy widely used to obtain hermetic seals in soft glass. This is possible because the thermal expansion of Dumet closely matches that of glass, and the material "wets" well, effecting the bond with the glass. Dumet is commonly supplied electroplated with gold, tin, or solder. Nickel - 41-42.5%
Manganese - .75-1.25%
Silicon - .3% max
Carbon - .08% max
Sulfur - .02% max
Phosphorus - .02% max
Residuals - 1% max
Iron....balance
Copper Cladding
Copper - 99.99% min
Oxygen - 0%

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