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Cu–Ni–Sn alloys

C72500 Copper-Nickel-Tin Alloy

An engineering Cu-Ni-Sn option for elastic elements and demanding parts requiring a balance of properties.

Electrical springsWear partsPrecision hardwarePrice on request
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C72500 Copper-Nickel-Tin Alloy

Catalogue material image.

Reference values: Brochure grades include C72500 (YWF92); properties depend on condition.

Technical data

Chemical composition

CuBalance
Ni9 wt%
Sn2 wt%
Mn≤0.2 wt%
Zn≤0.5 wt%
Fe≤0.6 wt%

Physical properties

PropertySI
Density8.90 g/cm³
Electrical conductivity11 % IACS
Thermal conductivity48 W/(m·K)
Melting point960 °C
Linear thermal expansion16.6 µm/(m·K)
Elastic modulus137 GPa

Mechanical properties by condition

Applicable only to the listed diameter and condition. UTS: ultimate tensile strength; YS: yield strength.

ConditionDiameter (mm)UTS (MPa)YS (MPa)Elongation (%)Hardness
M3-340Ø25–100340–410≥250≥3075–110 HV
H-380Ø25–100380–470≥200≥10110–150 HV
H-450Ø25–100450–530≥370≥6140–170 HV
H-500Ø25–100500–580≥450≥3160–190 HV
H-560Ø25–100560–650≥520≥2180–210 HV
H-610Ø25–100≥610≥580Not stated>190 HV

Product forms

Round bars

Made to order / stock on inquiry · Price on request

Typical applications

  • Electrical connection hardware and switching springs
  • Elastic structural components
  • Wear-resistant precision parts

Selection checklist

  • Confirm strength level, age-hardening condition and relevant electrical requirements.
  • Compare fatigue life and corrosion environment with alternative alloys.

Take these parameters to your enquiry

The enquiry form will carry this grade automatically.

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Cu–Ni–Sn alloys

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