For the production of copper rod used about twenty kinds of copper grades. The most commonly used: M1, M1r, M2, M2P, M3, M3R. In most cases, the copper rods M3R manufactured for specific customers and are a bit more expensive than their production of other grades of copper. The price depends on many factors: the mode of production, the chemical composition of copper rod type and size.
The chemical composition of grades of copper GOST regulates 859. Stamps copper are determined not only by the content of copper (differences, which make up about 0.5%), but also the content of impurities. In most cases, use the classification of grades of copper content of oxygen. For high-purity copper refers M1 mark containing oxygen - 0.001%. Stamps M2, M3 - general purpose copper containing oxygen 0.08 - 0.05%. The copper grades M1r, M2P, M3R contains large amounts of phosphorus and 0.01% oxygen.
Copper rods M3R method for production can be:
- Cold-deformed and hot-deformed;
- Extruded and drawn.
By type cross-section are:
- Hex;
- Round;
- Square;
Brass rods M3R tolerance and precision marked the letters "B" - high, "P" - high, "H" - normal.
The main factors that allow the use of copper rods M3R as a versatile material in various industrial productions are its performance, corrosion resistance, and environmental safety. Brass rods M3R, thanks to its physical and mechanical properties, are used in the engineering and metalworking industries. They are easy to drilling, cutting, milling, pressing and stamping. In aviation, automobile and shipbuilding copper rods M3R act in the production of semi-finished components and assemblies of parts. From copper rod produced nuts, bolts, valves, washers, bushings, shafts and gears. Articles made of copper (valves, gears, locking mechanisms) are used in gas and water supply systems.

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