RESISTANCE
WELDING 
End
Uses
Why
Copper Beryllium?
Copper beryllium alloys exceed the requirements
of the Resistance Welding Manufacturers Association
(RWMA) for Class 3 and Class 4 alloys. Copper
beryllium’s high strength, high conductivity,
high elastic modulus and elevated temperature
properties result in superior performance
in welding applications compared to other
copper alloys.
User
Benefit/Solution
RWMA Class 3 requirements are best met with
C17510
(Brush Alloy 3). C17510 is specified for
applications that require high strength and
high conductivity, such as electrode tips
and welding wheels. C17510’s high strength
results in a higher fatigue strength, which
translates into greater cycles before failure
during use. C17510’s higher elastic
modulus, compared to other copper alloys,
allows for better dimensional stability of
the welding component during use. The higher
thermal and electrical conductivity of C17510
allows components to run cooler, and consequently
last longer. To the consumer, these benefits
result in fewer replacement parts, less down-time,
better welds and better accuracy when using
C17510.
RWMA
Class 4 requirements are met with C17000
(Brush Alloy 165) and C17200
(Brush Alloy 25). Typically, Brush Alloy
165 is used for resistance flash welding die
inserts because of its excellent wear and
galling resistance, high electrical and thermal
conductivity, excellent machinability and
corrosion resistance. In service, it will
not adhere to steel, and it does not soften
or deform under heat and high pressure. The
benefit to the consumer will be higher quality
welds and longer die insert life. Brush Alloy
25 offers similar benefits and is often used
for welding guns, and body holders of resistance
welding equipment.
