Kutherm Alloys

Kutherm 3 & Kutherm 10

They are particularly useful in low temperature heating applications such as underfloor heating and blanket wires. Kutherm alloys are copper based resistance wires with enhanced corrosion and temperature coefficient propoerties.  

Kutherm Alloys are available in sizes down to 0.06 mm either bright annealed or hard drawn.

 Physical and Mechanical Properties

 

Units

Kutherm 3

Kutherm 10

Maximum continuous operating temperature in air

°C

°F

150

300

250

480

Nominal composition

%

Cu 99

Sn 1

Cu 95

Sn 5

Density at 20°C

g/cm³

lb/in³

8.9

0.32

8.85

0.32

Resistivity at 20°C

µWcm

W/cmf

3

18

10.2

61.2

Temperature Coefficient of Resistance

20 – 100°C

68 – 212°F

1/°C

1/°F

0.0022

0.0012

0.00079

0.00044

Coefficient of thermal expansion,

20 – 100°C

68 – 212°F

1/K

1/°F

18 x 10-6

10 x 10-6

18 x 10-6

10 x 10-6

Thermal conductivity at

20°C

68°F

W/mK

Btu.in/ft².h.°F

215

1518

75

530

Specific heat capacity at

20°C

68°F

kJ/kgK

Btu/lb°F

0.38

0.11

0.38

0.11

Melting point (approx.)

°C

°F

1050

1900

1000

1800

Magnetic properties (up to Curie point)

 

Non-Magnetic

Non-Magnetic

 Tensile strength Rm(0.5 mm wire)

N/mm²

lb/in²

300

43000

400

58000

Elongation at break (approx.) (0.5 mm wire)

%

30

30

The figures given in this table represent nominal or typical values. 

Information contained within this technical data sheet is based upon the general experience of Scott Precision Wire Ltd and is believed to be correct at the time of issue. 

No warranty is given or is to be implied from  the details above. 

Customers are advised to carry out independent tests in order to determine the suitability of any Scott Precision Wire Ltd product for an application.

  

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