Tin-plated copper-clad steel wire has emerged as the price of non-ferrous metals on the market continues to rise. As a "alternative" of pure copper wire, it has higher cost performance and does not lose pure copper wire in performance. Let's take a look at the definition and characteristics of tinned copper clad steel wire.
The tinned copper clad steel wire is generally divided into a soft state (A) hard state (H) and two types, which are made of high quality low carbon steel as a core wire, and are uniformly coated with an oxygen-free copper layer by mechanical means, and then plated (generally Divided into cold-plated, hot-plated) pure tin layer new composite material. Due to the high purity of each coating (plating) layer, the copper coating and the steel core wire, the copper coating and the tin plating layer have good compactness.
The relative conductivity of tin-plated copper-clad steel wire varies with the thickness of the coated copper layer. The thicker the copper-clad layer is, the higher the relative conductivity is. Generally, the relative conductivity is 15 - 40% copper-clad steel wire. The products with lower relative conductivity are mainly used in products with lower conductivity requirements, and the products with higher relative conductivity are mainly used in products with higher conductivity requirements. The thicker the copper layer, the higher the relative conductivity, the larger the proportion of copper contained, the higher the price. Take the current market price as an example: the relative conductivity is 15--20% tinned copper clad steel wire sales price 20 -25 yuan / kg, the relative conductivity of about 30% of the tinned copper clad steel wire sales price has reached 28---33 yuan / kg.
Characteristics of tinned copper clad steel wire:
(1) Low price: At present, the price of universal tin-plated copper-clad copper wire is only equivalent to 1/2~1/3 of the price of pure copper wire products.
(2) With high strength and toughness of steel: tin-plated copper-clad copper wire is high in steel and easy to cut and form. It is suitable for the whole assembly process and automatic production process. The tensile strength is 2 times higher than ordinary tinned copper wire. The coefficient of linear expansion is small.
(3) Light weight: 13% lighter than tinned copper wire, 1.10 times the length of tinned copper wire under the condition of the same diameter and weight.
(4) Good welding performance: 4 hours of aging in steam, and good welding after 16 hours of aging at 150 °C.
(5) Appearance and cleanliness: no copper, tin, black spots, rust, cracks, tin tumors, burrs, no difference from the appearance of ordinary tinned copper wire.
(6) Excellent high frequency. At high frequencies, the agglomeration effect increases with increasing frequency. At this time, the wire conductivity can be compared with the same section of pure copper wire.
In addition, the tin-plated copper clad steel wire has high conductivity, magnetic permeability and high strength of steel wire, bending property, tin thermal conductivity, corrosion resistance, and certain oxidation resistance at high temperatures. In addition, because of his superior strength and weldability, it is resistant to bending and welding, and its vibration resistance is 3-6 times that of pure copper wire, which is convenient for automatic operation. Therefore, it is widely used in electronic component leads and jumpers, RF cable cores, and has become an ideal wire in the communications, electronics, and power industries.
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