Chromium-zirconium Copper Strip/ Sheet

Chrome-zirconium copper strip is a thin plate or strip made of chrome-zirconium-copper (CuCrZr) alloy. It has high strength, high conductivity, high temperature resistance and wear resistance. It is specially designed for precision processing needs and is widely used in electronics, electricity, welding and high-end industrial fields.

1、Available models and processing technology

Thickness range: 0.1-2.0mm, ultra-thin strip can reach 0.05mm

Tolerance requirements: high-precision strip thickness tolerance ±0.005mm

Processing technology:

Stamping: pre-aging processing (low hardness, good ductility).

Welding: Laser welding/electron beam welding is preferred to avoid softening of the heat-affected zone.

Surface protection: vacuum packaging storage to prevent oxidation (especially before aging).

2、Common grades and standards

International standards

ASTM B196 C18150 (American standard): Cr 0.5-1.5%, Zr 0.05-0.25%

EN CW106C (European standard): Cr 0.4-1.2%, Zr 0.03-0.15%

JIS C18140 (Japanese standard): composition is similar to C18150

Domestic grades

QCr0.5-0.2-0.1 (GB/T 5231): Cr 0.4-0.8%, Zr 0.1-0.25%

3、Core characteristics

Characteristics Value/performance Comparison of industry advantages

Conductivity 75-85% IACS (aged state) Close to pure copper, much better than beryllium copper

Tensile strength 400-600 MPa (after aging hardening) Comparable to medium carbon steel

Softening temperature ≥500°C Strong resistance to welding heat

Hardness 120-180 HV Better wear resistance than pure copper

Bending performance Good (R/t≤1, still bendable after aging) Suitable for precision stamping

4、Application scenarios

Semiconductor industry: discrete devices, lead frames

Electronic industry

Connectors/terminals: high conductivity + high elasticity (such as 5G base station RF components).

Lead frame: replace iron-nickel alloy, reduce weight and improve heat dissipation.

Power equipment

Switch contacts: arc erosion resistance (high-voltage circuit breaker).

Bus: high current carrying capacity.

Welding field

Resistance welding electrode strip: spot welding/roll welding wheel (automobile body welding).

High-end manufacturing

Mold inserts: plastic injection mold heat sink.

Heat sink material: laser/semiconductor cooling substrate.