The production process and product advantages of C12200 copper strip are as follows:

1. Production process

Melting and casting process

After the raw materials are pretreated, batched and melted, the ingots are produced by vertical semi-continuous casting technology. During the smelting process, trace phosphorus (0.013%~0.050%) is added for deoxidation to reduce the oxygen content to avoid "hydrogen disease" (risk of hydrogen embrittlement).

Hot rolling and cold rolling

After the ingot is heated, it is hot rolled, then the surface oxide layer is removed by milling, and then it is cold rolled several times to reach the target thickness (as low as 0.05 mm). The thickness tolerance of the copper strip after cold rolling can be controlled within ±0.003 mm to meet high precision requirements.

Annealing treatment

Annealing is required after cold rolling to eliminate work hardening. The annealing temperature range is 400~600℃ (soft state) or 700~1200℉ (hard state adjustment). The annealing process can optimize the ductility and mechanical properties of the material.

Surface treatment and finishing

After degreasing, rinsing, and flux coating, the copper strip can be subjected to surface treatments such as hot-dip tinning (such as environmentally friendly reflow tinning process), and finally the finished product is completed through slitting, coiling and testing.

5. Quality control

The risk of hydrogen embrittlement, cold working cracking tendency and conductivity stability need to be monitored throughout the production process to ensure compliance with domestic and international standards such as ASTM B42 and GB/T.

2. Product advantages

Excellent electrical and thermal conductivity

The electrical conductivity reaches 79%~85% IACS, and the thermal conductivity is 340 W/(m·K), which is suitable for high-sensitivity signal transmission and heat dissipation scenarios (such as semiconductor packaging, electrical connectors).

High processing adaptability

Supports cold/hot forming, high-precision stamping, bending and deep drawing processes, compatible with various welding methods such as oxyacetylene welding and gas shielded arc welding, and has stable surface treatment (tinning, polishing) performance.

Hydrogen embrittlement and corrosion resistance

The phosphorus deoxidation process significantly reduces the oxygen content (≤0.01%), avoiding the risk of hydrogen embrittlement. At the same time, it performs well in reducing atmospheres and is suitable for high-temperature welding and marine engineering environments.

Diversity of specifications and high precision

The thickness range is 0.05~1.5 mm, the width is 10~305 mm, the roll weight is up to 6 tons, and the tolerance control is strict (such as ±0.003 mm), which meets the precision requirements of cables, electronic components, etc.

Meet high standards and extensive certification

Meet the requirements of ASTM B42, B152, and the national standard "Copper Strip for Cables". The mechanical properties (tensile strength 215~360 MPa, elongation ≥25%) and electrical performance indicators are better than international similar standards.

Wide range of applications

Covering power cables, semiconductor packaging, automotive parts (brake systems, radiators), building water pipes and seawater desalination equipment, with both lightweight and high-strength design potential.