RWMA Class 3 - Copper Cobalt Beryllium C17500 | ALCAVIL Technical Data Sheet

RWMA Class 3 - Copper Cobalt Beryllium (CuCoBe)

UNS C17500

RWMA CLASS 3

Ref: AWS J1.3/J1.3M:2020 - Specification for Materials Used in Resistance Welding Electrodes and Related Equipment

SAFETY - BERYLLIUM: This alloy contains Beryllium. Machining, grinding, or any operation that generates fine particles requires adequate ventilation and personal protective equipment. Consult the Safety Data Sheet (SDS) before processing. Comply with OSHA 1910.1024.

MINIMUM AWS J1.3 PROPERTIES - CLASS 3

Property	Minimum	Unit
Electrical Conductivity	45	% IACS
Hardness	90	HRB

CHEMICAL COMPOSITION

Cu	Be	Co
Balance	0.4 - 0.7%	2.4 - 2.7%

TYPICAL PHYSICAL PROPERTIES

Property	Typical Value	Unit
Electrical Conductivity (typical)	45 - 55	% IACS
Hardness (typical, aged)	90 - 98	HRB
Thermal Conductivity	200 - 210	W/m-K
Density	8.75	g/cm3
Softening Temperature	590	C
Tensile Strength	590 - 760	MPa
Melting Point	1060	C

RECOMMENDED APPLICATIONS

Projection welding of nuts
Projection welding of studs
High pressure electrodes
Welding dies and fixtures
Applications requiring Class 3

KEY FEATURES

Alternative to C17510 with Cobalt
High hardness comparable to CuNiBe
Good resistance to deformation
Similar conductivity to C17510
Available for some specific applications

EQUIVALENT DESIGNATIONS

RWMA Class 3 UNS C17500 CuCoBe Cobalt Beryllium Copper Alloy 10

APPLICATION NOTE: C17500 (CuCoBe) is an alternative to C17510 (CuNiBe) for Class 3 applications. Both alloys meet the minimum AWS J1.3 requirements for Class 3. The choice between them usually depends on material availability. C17510 is more common in the North American market for projection welding electrodes.