Kutherm Alloys

Kutherm 3 & Kutherm 10 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 properties. Kutherm Alloys are available in sizes down to 0.06 mm either bright annealed or hard drawn.

Physical and Mechanical Properties

UnitsKutherm 3Kutherm 10
Maximum continuous operating temperature in air°C150250
°F300480
Nominal composition%Cu 99Cu 95
Sn 1Sn 5
Density at 20°Cg/cm³8.98.85
lb/in³0.320.32
Resistivity at 20°CµΩcm310.2
Ω/cmf1861.2
Temperature Coefficient of Resistance20 – 100°C1/°C0.00220.00079
68 – 212°F1/°F0.00120.00044
Coefficient of thermal expansion,20 – 100°C1/K18 x 10^618 x 10^6
68 – 212°F1/°F10 x 10^610 x 10^6
Thermal conductivity at20°CW/mK21575
68°FBtu.in/ft².h.°F1518530
Specific heat capacity at20°CkJ/kgK0.380.38
68°FBtu/lb°F0.110.11
Melting point (approx.)°C10501000
°F19001800
Magnetic properties (up to Curie point)Non-MagneticNon-Magnetic
 Tensile strength Rm(0.5 mm wire)N/mm²300400
lb/in²4300058000
Elongation at break (approx.) (0.5 mm wire)%3030

The figures given in these tables 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.