Chromaloy® Alloy Spooled Wire

Chromaloy® Alloy Spooled Wire is an iron–chromium–aluminum (Fe75-Cr20-Al5) resistance alloy supplied in precision-wound spools, optimized for high-temperature electrical heating and thermal control applications. The alloy’s aluminum content promotes the formation of a dense alumina (Al₂O₃) layer, providing exceptional oxidation and corrosion resistance, while chromium enhances mechanical stability and resistance uniformity under cyclic heating. Its combination of high electrical resistivity, thermal durability, and mechanical strength makes it ideal for industries such as aerospace, electronics, and advanced manufacturing. Key applications include furnace heating coils for metallurgical processing, radiant heating elements for industrial dryers, and precision resistors in thermal control circuits. In research, Chromaloy® wire supports studies in high-temperature oxidation kinetics, ferritic alloy microstructural stability, and surface engineering to extend heating element lifespan. Its robust performance in demanding environments ensures it remains an essential material for both large-scale industrial systems and specialized scientific instrumentation.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Wire

Diameter		±10%
Length		+5% / -1%

Material Properties for Alloys

Mechanical Properties

Element	Value
Elongation at break( % )	15
Tensile strength( MPa )	650

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	137
Temperature coefficient( K⁻¹ )	0.00007

Magnetic Properties

Element	Value
Curie temperature( C )	600

Thermal Properties

Element	Value
Maximum use temperature in air( C )	1250
Melting point( C )	1500
Thermal conductivity( W m⁻¹ K⁻¹ )	16@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	11@20-100°C