Copper

C18200 Copper

Chromium copper (Class 2)

C18200 copper (copper-chromium, CuCr1) is a precipitation-hardening alloy that combines high electrical and thermal conductivity with good mechanical strength and hardness. It is the benchmark beryllium-free RWMA Class 2 chromium copper, widely used in resistance welding electrodes and wheels, electrode holders and high-conductivity components.

Standards and equivalents

UNS	ASTM / ASME	RWMA	EN	DIN	JIS
C18200	—	Class 2	CW105C	2.1291	C1820

Chemical composition

%	Cr	Fe	Si	Pb	Others	Cu
Min	0.60	----	----	----	----	----
Max	1.20	0.10	0.10	0.05	----	Bal.

Supply condition

Hot rolledTF00 (AT) temper

Hot forgedTF00 (AT) temper

Available package sizes

Round bars1/4" – 3"6.35 mm – 76.2 mm

Plates1/8" – 3"3.18 mm – 76.2 mm

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Typical applications

• Resistance welding electrodes
• Welding wheels and tips
• Welding dies
• Electrode holders and arms
• Back-up bars
• Contacts and switching
• Conductor bars (bus bars)
• Mold inserts and heat sinks
• Electrical switch components

Note: The information and values in this data sheet are provided for reference only and may vary depending on manufacturing, treatment and application conditions. They do not constitute guaranteed specifications, so use and interpretation of this data is the user's responsibility.

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