Hidurel® 5 is a precipitation-hardening copper-nickel-silicon alloy possessing high electrical and thermal conductivity with very good notch ductility and high mechanical strength. Annealing at elevated temperature creates a soft supersaturated alpha-phase structure, before subsequent age hardening at lower temperature precipitates finely dispersed nickel silicide in the matrix. Despite its high strength, the alloy is resistant to hydrogen embrittlement. Resistance to corrosion under marine and industrial conditions is excellent and the alloy has good anti-frictional and bearing properties. With a magnetic permeability of less than 1.001, the alloy is essentially non-magnetic.
The excellent combination of properties provided by Hidurel® 5 is the result of careful control of chemical composition and heat treatment. Tensile properties are uniform and virtually independent of section thickness. The heat treatment of the alloy also ensures dimensional stability of a high order.
Hidurel® 5 meets the mechanical and chemical properties of DTD 498, BS 4577 Type A3/2 and Rolls Royce MSRR 8501 to which Langley Alloys regularly supply so can therefore be specified in confidence for high integrity components. Cold worked material to DTD 504 can also be supplied to order.
|Supplied to BSB25||Supplied to DTD498||Supplied to DTD 504 (Cold Drawn)|
|0.1% Proof Stress||417 N/mm2||60.5ksi||417 N/mm2||60.5ksi||572 N/mm2||82.9ksi|
|0.2% Proof Stress||430 N/mm2||62.4ksi|
|Tensile Strength||587 N/mm2||85.1ksi||587 N/mm2||85.1ksi||649 N/mm2||94.1ksi|
|Hardness (Brinnel)||159-207HBN||159-207HBN||174-210 HBN|
|Impact Strength (Room Temp)||27J||27J|
|Magnetic Permeability (20°C)||< 1.001|
|Young’s Modulus (kN/mm2)||284|
|Modulus of Rigidity (kN/mm2)||106|
|Specific Electrical Resistance, 20°C (Ω-m)||0.043|
|Electrical Conductivity, 20°C (mΩ/mm2)||6.9 (40% IACS)|
|Mean coefficient of thermal expansion, 20-400°C (m/m/degC)||16 x 10-6|
|Specific Heat, 20°C (J/kg.K)||419|
|Thermal conductivity, 20°C (W/m.K)||190|
|Thermal conductivity, 200°C (W/m.K)||211|
|Thermal conductivity, 400°C (W/m.K)||232|
|Coefficient of static friction against mild steel||0.45-0.50|
|Coefficient of dynamic friction against mild steel||0.26 (dry), 0.33 (wet)|