Circle, rod cobalt
Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a circle and a rod of cobalt in a wide range of lengths and diameters. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Cobalt is a brilliant, silvery-white metal with magnetic properties (ferromagnetism) and good wear resistance. In small quantities, cobalt strengthens alloyed steels and improves their operational durability. Properties of cobalt heat resistance are preserved up to temperatures of 300… 350 0 С; at higher temperatures, the metal is coated with an oxide film, and interacts with sulfur and phosphorus, exhibiting increased brittleness. The production of cobalt is regulated by the technical requirements of GOST 123−2008.
Urgency of application
Because of the good magnetization of cobalt, it is used to make permanent magnets. For the manufacture of particularly powerful magnets, the metal is additionally alloyed with aluminum and nickel.
The main application of a rod and a circle of cobalt is the production of cylindrical volumetric parts of industrial and domestic ionizers. Other applications relate to the details of precision instruments and mechanisms for which high-temperature strength is important.
GOST 123−2008 provides for the production of rods and a circle of cobalt grades K0, K1 and K2, which are obtained by electrolysis (K0) or refining (other brands). Accordingly, the metal content of the final product is:
- For cobalt, K0 is 99.98%;
- For cobalt K1, it is 99.25… 99.35%;
- For cobalt K2, it is 98.3%.
The main technological impurities are: for rod and circle, made of cobalt of K0 grade — aluminum, carbon, iron, copper, silicon, nickel, zinc, for K1 and K2 additionally — bismuth, sulfur, manganese, magnesium, arsenic, tin.
Physical and mechanical properties
- Density, kg / m 3 — 8890;
- Melting point, 0 С — 1495;
- Specific heat capacity, J / kggrad — 456;
- Coefficient of thermal conductivity at room temperature, W / megade — 100;
- Coefficient of temperature expansion at room temperature, μm / deg — 12,9;
- Modulus of elasticity, GPa — 196;
- Limit of time resistance, MPa — 700;
- Yield strength, MPa — 190.
Assortment and application features
A rod and a circle of cobalt are made with a diameter of 5 to 100 mm, with a length of 50 to 2000 mm. In cobalt K0, the mass fraction of manganese may be increased to 0.05%, and in cobalt K1 and K2 — up to 0.07%.
Supplier — AvekGlob company — offers to purchase a bar or a cobalt circle in a variety of brands and sizes. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.