CuCo2Be UNS.C17500 Cobalt Beryllium Copper
C17500 Cobalt Beryllium Copper
CuCo2Be C17500 (CDA 175) Cobalt Beryllium Copper is primarily utilized in the industry
applications that require most highly thermal or electrical
conductivity, which features a cobalt alloying addition
(2.402.70%). C17500 also Offers good strength and hardness
characteristics coupled with conductivity in the range of 4560
percent of copper with ultimate tensile and hardness properties
approaching 140 ksi and RB 100 respectively.
Typical Application for C17500 Cobalt Beryllium Copper Alloys:
Electrical Industry: Fuse Clips, Switch Parts, Relay parts, Connectors, Spring
Fasteners: Washers, Fasteners
Industrial: Springs, Seam Welding Dies, Resistance Welding Equipment,
Resistance and Spot Welding Tips, Tooling for Plastic Moulds,
Die“Casting Plunger Tips.
Custom Diameter and Sizes, Random Mill lengths
Available Products (forms):
Round bars, Round wires, Round tube,
Flat bars, Square bars, Rectangular bars, Hexagon bars, Plates,
Custom shapes are available upon request.
Note: Copper plus additions equal 99.5% minimum.
Typical Physical Properties:
Density (g/cm3): 8.83
Density before age hardening (g/cm3): 8.75
Elastic Modulus (kg/mm2 (103)): 14.10
Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 18 x 106
Thermal Conductivity (cal/(cms°C)): 0.48
Melting Range (°C): 10001070
1). the units are based upon Metric.
2). the typical physical properties apply to age hardened products.
Rods/Bars/Tubes: ASTM B441, SAE J461,463; RWMA Class 3
Strips: ASTM B534
Sheets: ASTM B534
Wires: ASTM B441
Plates: ASTM B534, SAE J461,463; RWMA Class 3
European Standards: CuCo2Be, DIN 2.1285; CW104C to EN
ASTM: American Society for Testing and Materials
SAE: Society of Automotive Engineers
AMS: Aerospace Materials Specification (Published by SAE)
RWMA: Resistance Welder Manufacturers' Association
Note: Unless otherwise specified, material will be produced to ASTM.
The Mechanical Properties will be available on request from
Most Commonly Temper Used:
Strips: A(TB00),1/4 H(TD01),1/2 H(TD02),H(TD04)
Sheets: A(TB00),1/4 H(TD01),1/2 H(TD02),H(TD04),AT(TF00)
Wires: A(TB00),1/4 H(TD01),1/2 H(TD02),3/4H(TD03),H(TD04)