Zinc and zinc alloys
Zinc has a densely Packed hexagonal lattice (HCP). This explains the abrupt anisotropy of its properties. The metal in the cast condition at room temperature low-plasticity at a temperature of from 100 to 150 °C the ductility increases significantly, which gives the possibility to subject the processing of pressure — pressing, rolling, deep drawing and stamping. When processing under pressure adaptability of zinc depends on the purity. The tin impurity, which forms a eutectic composition with zinc at a temperature of 199 °C, and in particular the simultaneous presence of lead and cadmium, which form a complex zinc eutectic at t° to 150 °C, has a negative impact on handling under hot pressure. In this regard, the content of these impurities in the zinc and its alloys are strictly limited.
- In the alloy CAM4−1, mass fraction of lead should not exceed 0.004%.
- In alloys of zinc that are used for rental, the share of aluminium — up to 0.005%.
- In the alloy CV00 the proportion of bismuth, aluminum, antimony and Nickel should not exceed 0.1%.
- In zinc alloy and CV0 CV00 the proportion of arsenic at the request of the customer — in the range of 0.0005%.
All zinc casting alloys have a very narrow temperature interval of crystallization, have eutectic properties, thereby, good fluidity and give a very dense castings. The best method of producing castings is considered to be chill casting or molding pressure. The relatively low casting temperatures (440 to 470°C) reduces the requirements for heat resistance of molds and press molds, and improved fluidity will allow you to cast a complex shape, thin parts. Sometimes (especially for parts with complex configuration) use the sand casting. In this way the resulting castings contain many pores, the structure is more coarse, which leads to a significant variation of properties and reduction in the quality of zinc products. CV00 alloy is cast in ingots weighing 4 — 5 kg 8 — 10 kg, and alloys CV, CV0, C0A, C0,1,2,3 — in pigs weighing from 19 to 25 kg and in blocks weighing 500 and 1000 kg.
Zinc alloys are used for thermal diffusion and chemical hot and cold galvanizing of steel products; production of chemical current sources; in the printing industry; as an alloying element in the alloy (mostly brass) and as the basis of zinc alloys.
The marking is made by a colored method. Zinc blocks and ingots marked with paint on the end. Alloy C0 is marked with a single stripe of white.
To buy, price
The company «Electrocentury-steel» implements non-ferrous metals at the best price. It is formed taking into account the rates on the LME (London metal exchange) and depends on technological features of production without the inclusion of additional costs. Supply products of zinc and its alloys in a wide range. All batches of products are certified. Here you can buy wholesale all necessary for large-scale production. A wide selection of merchandise, comprehensive consultations managers, reasonable prices and timely delivery define the face of our company. The timing of orders is minimal. The price depends on order volume and additional conditions of supply. Wholesale customers receive discounts.