Hot Cutting Wire

Resistance wire is used as a hot cutting wire for the accurate cutting of complex shapes from polystyrene foam (EPS) and extruded polystyrene (XPS). Depending on the application, the resistance wire is generally a special nickel alloy or a stainless steel, and is heated to approximately 200°C by electrical resistance.

Hot wire cutting is used extensively in the packaging industry and for cutting shapes for R&D prototyping, modelling and architectural mouldings.


Knight Precision Wire are specialist manufacturers of Wire and Cable and can provide free quotations on your requirements. Please get in touch to arrange this.

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MaterialPhysical & Service Properties
ORW - L Good heating characteristics and easily bent to shape for hand cutting of patterns.
ORW - M Moderate strength and low electrical resistivity are utilised for low heat applications.
ORW - H Good heating characteristics in a medium strength wire.
ORW - EH Hight strength at elevated temperature, with good creep resistance.
The best general purpose cutting wire.
ORW - S The highest specification cutting wire.
Very high strength at elevated temperatures, with high creep resistance.


Max. Op. Temp.
Coefficient of Expansion 
ORW - L 108 8.35  800  1150  17.5 
ORW - M 70 8.00 1200 950 17.6
ORW - H 122 8.28 1300 700 12.6
ORW - EH 118 8.18 1400 950 12.7
ORW - S 131 8.25 1600 980 13.6