Alloy C17510

Alloy C17510,  BeCu sheet C17510,  Copper alloy C17510 bar

Alloy C17510 Beryllium Copper, also known as alloy No. 3 or alloy class 3 cooper, referred as the best spring copper. This alloy offers good strength, high thermal conductivity and hardness characteristics. UNS C17510 copper has high elasticity, wear resistance, fatigue resistance and heat resistance after quenching and tempering. C17510 alloy is heat treatable, easy to weld and excellent corrosion resistance in the atmosphere and seawater. LKALLOY is a leader in the industry of supplying ASTM B534 C17510 sheets and  ASTM B441 bars with various size and specifications.

Available Forms And Specifications

C17510 Beryllium Copper can be supplied fully hardened by our processing mill and is available in wrought product forms such as bars, rods, sheets and plates.

  • Sheet / Plate / Strip: ASTM B534, SAE J463, SAE J461
  • Seamless Pipe / Tube: SAE J463, J461
  • Rod/Bar: ASTM B441, ASTM B534

Chemical Composition

Cu Be Al Co Si Ni

(nominal 97.8%)

0.2-0.6 0.2 max 0.3 min 0.2 max 1.4-2.2

Mechanical Properties

Density lb/in³ 0.319
Elastic Modulus(10⁶ psi) 20
Coefficient of Thermal Expansion (in./in./°F) 9.8 x10⁶
Thermal Conductivity (btu/°F) 140
Melting Temperature °F 1900-1980
Tensile Strength, ksi 100-130
Yield Strength, 0.2% offset ksi 80-100
Elongation 10-25
Hardness (HR) 175-195


BeCu alloy C17510 is typically used in the applications that require high thermal or electric conductivity such as brushes, switches, relays, fasteners, connectors, thermostat spring sheets and other stress parts.

With decades of experience and a huge range of stock, Lkalloy is an industry leader in the supply of beryllium copper bars C17510 and other high quality specialist engineering alloys. To buy or learn more about beryllium copper, contact us now and we will be in touch shortly.

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