History of zinc. Mechanical and physical properties of zinc alloys.
The designations in the table are as follows: casting in a cauldron - K; casting in sand molds - P; casting under pressure - D.
| Casting method | Grade of alloys | Relative elongation, % | Tensile strength, MPa (kgf/mm2) | Hardness, NV |
|---|---|---|---|---|
| K | TSA4 о, TSA4 | 1,8 | 256 (26) | 70 |
| Д | ZnA14A | 1,2 | 196 (20) | 70 |
| KD | CA4M1v | 0,5 | 196 (20) | 65 |
| KD | ZnA14Cu1A, TsA4M1 o, TsA4M1 | 1,01,7 | 215 (22)270 (28) | 8080 |
| П | ЦА4М3 о | 1,0 | 235 (24) | 90 |
| К | ZnA14Cu3A, | 1,0 | 215 (22) | 85 |
| Д | CA8M | 1,51,5 | 235 (24)270 (28) | 7090 |
| KD | CA4M3 | 1,5 | 290 (30) | 90 |
| CA | CA30M5 | 8,01,0 | 435 (44)370 (38) | 115 115 |
Physical properties of zinc casting alloys in accordance with
| Alloy grade | Specific heat capacity at 20 °C, J/kg × deg-1 | Temperature coefficient of linear expansion in the temperature range 20-100 °C, a x10-6, deg-1 | Temperature range of hardening, °C | Density, (kg/m3) x10-3 | Thermal conductivity, W/m x degree-1 |
|---|---|---|---|---|---|
| CA4M1 | 440 | 26,5 | 380-386 | 6,7 | 109 |
| CA4 | 410 | 26,0 | 380-386 | 6,7 | 113 |
| CA8M1 | - | - | 375-404 | 6,3 | - |
| CA4M3 | 427 | 29,5 | 379-389 | 6,8 | 105 |
| CA30M5 | - | - | 480-563 | 4,8 | - |
Brazing and welding
Zinc alloys can be joined by both brazing and welding. But technologically, these processes are used mainly to repair surface defects, because brazed and welded joints have low strength. Tin-lead solders can only be used to braze nickel-plated parts using acidified zinc chloride flux. A solder containing 17.5% Zn + 82.5% Cd has good results. In this variant flux is not required. Carry out welding in a reducing flame, using additives of the same alloy as the items to be welded.
Casting Alloys
They are widely used for casting carburetor bodies in the automotive industry: parts of hydraulic brakes, speedometers, pumps, radiator grilles, as well as in other industries and household appliances - for cast parts of instruments, fittings
Protective coatings
Such coatings are not only applied to products to increase corrosion resistance, but also for decorative purposes. Depending on the application conditions, protective two- and three-layer coatings of varying thicknesses are used. As an alternative coating is usually used nickel, chromium and copper.
Buy, price
Evek GmbH sells non-ferrous metals at the best price. It is formed taking into account the LME (London metal exchange) rates and depends on the technological features of production without additional costs. We supply a wide range of zinc and zinc-alloy products. All batches are certified. With us you can buy in bulk everything you need for large-scale productions. The wide choice of goods, exhaustive consulting of managers, reasonable prices and prompt delivery determine the face of our company. Delivery time is minimal. The price depends on the order volume and additional delivery terms. Wholesale customers receive discounts.
