Copper Strip High-end Demand Is Urgent.

1. Copper plate belt is the highest barrier in the copper processing industry. As an important downstream of copper strip, connector consumes a lot of strip material. As chip carrier of integrated circuit, lead frame also belongs to connector. It uses bonding materials to realize the electrical connection between the lead end of the internal circuit of the chip and the external wire, and acts as a bridge connecting with the external wire. Lead frame and production and packaging application needs, in addition to high strength, high thermal conductivity, but also requires better brazing, stamping, etching and oxide film adhesion. Often selected copper - iron, copper nickel silicon C70250 and other production.

2. Cu-ni-si and Cu-Cr-Zr alloy plate and strip belong to medium and high strength and high conductivity alloy, Domestic Bowei alloy has been able to mass production, Xingye Shengtai copper industry can mass production of Cu-Ni-Si alloy. Only Oriental tantalum can produce beryllium copper (Cu-Be) in China, but Cu-Ti cannot Be supplied by domestic companies. In particular, Cu-Ni-Si alloy has been widely used in electronic field due to its excellent high temperature stability.

3.Copper-nickel-silicon合金具有优良的压缩机ehensive performance, increasing permeability and great potential. The miniaturization of electronic products and the increasing trend of load capacity are obvious. In the case of high current connection, such as base station power connector, new energy vehicle connector and smart phone connector, the high conductivity cop-Ni-Si alloy can inhibit the heating and temperature rise, and form a strong substitution effect on other copper alloys, such as brass and tin phosphor bronze.

4. Car connectors are more heat resistant than smartphones. The temperature environment inside the car: engine 120℃, engine surface 135℃, instrument panel surface 120℃, interior floor 105℃, rear deck 117℃. When people take a car without air conditioning, part of the temperature inside the car can reach 120℃. Automobile connector selection of brass, tin phosphor bronze has been unable to meet the use requirements. Titanium copper or copper nickel silicon with better stress relaxation resistance should be used instead. Titanium copper is only produced abroad at present, and the processing cost is as high as 200,000 yuan/ton. Copper, nickel and silicon processing costs in 20,000-30,000 yuan/ton, comprehensive cost-effective advantage is obvious.

5. High performance and low cost products such as C42500, C41125 and PW33520 (exclusive patent products of Bowie alloy) have been developed at home and abroad to replace tin phosphor bronze. The yield strength of PW33502 alloy developed in China is 570Mpa and the conductivity is 34%, which is twice that of the original C5191. It can meet the requirements of high transmission and low temperature rise. The bad direction bending performance is better than the original C5191. Tin content is lower than C5191, can be recycled tin plating, nickel plating corner material. Comparison tin phosphor bronze has excellent comprehensive performance and high cost performance.

6. China's copper processing industry has gone through three stages, and has now entered the stage of high-performance materials represented by C7025. To meet the needs of communication, electronics and automotive industry upgrades. Xingye Shengtai Copper developed C7026 and C7035 copper nickel silicon materials. C7035 has excellent performance and can partially replace low beryllium copper alloy.

7.C18150/C18400 -- strength 600MPa with 85%IACS conductivity and 330W/(m· K) thermal conductivity, is the most ideal copper alloy with high conductivity, medium strength area, with very high stress relief and high temperature softening resistance characteristics. Applications: high-current connectors, oil-electric hybrid charge-discharge connectors, battery quick charge and flash charge, high-power relays, terminals and efficient thermal management solutions.

8. The future development of high performance copper alloys may be in the following four directions :(1) double 70 alloy, tensile strength 700MPa, conductivity 70%IACS, thickness 0.03-0.06mm; (2) environmental protection materials, tensile strength > 1000 MPa, yield strength > 950 MPa, conductivity > 45% IACS; (3) Composite new materials, using the characteristics and advantages of various metal varieties, to achieve the improvement of comprehensive performance and cost optimization; (4) Magnetic conductive materials, CFA copper-iron alloy products, the general iron content is 15-50%.

9. Japan's high-end strip is in short supply. Due to the rapid development of China's copper strip industry, Japanese enterprises can only produce high-end copper strip survival, such as copper nickel silicon series, copper chromium zirconium series, beryllium copper, titanium copper and so on. Japanese copper strip production (excluding brass strip) grew from 190,000 tons in 1991 to 270,000 tons in 2018, accounting for 15% to 33% of the copper processing industry. The increments mainly come from :(1) semiconductor lead frames, etched type; (2) Automobile connector; (3) low insertion force reflux tin plating process; (4) Mobile phone tin bronze, Corsen alloy, titanium copper, beryllium copper. As a result of enterprise merger and product upgrade, copper strip industry processing fees rose.

10. Japanese companies have embarked on a new round of investment thanks to improving demand and growth in automotive electronics. Japanese companies are optimistic about the downstream: Internet of Things, artificial intelligence, big data, autonomous driving, electric vehicles and other emerging industries on semiconductors and sensors, etc. These downstream will drive long-term demand for high performance copper strip.