Conductor materials. Brass. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Conductor materials. Brass. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrical materials

Alloys of copper and zinc, called brassare widely used in electrical engineering. Zinc dissolves in copper up to 39%.

In various brands of brass, the zinc content can reach up to 43%. Brasses containing up to 39% zinc have a single-phase solid solution structure and are called brasses. These brasses have the highest ductility, so parts are made from them by hot or cold rolling and drawing: sheets, tapes, wires. Without heating, parts of complex configuration can be made from brass sheet by deep drawing and stamping.

Brass with a zinc content of more than 39% is called α+β- brass or two-phase and are used mainly for shaped castings.

Duplex Brasses are harder and more brittle and only pressurized when hot.

The addition of tin, nickel and manganese to brass increases the mechanical properties and corrosion resistance, and aluminum additives in compositions with iron, nickel and manganese give brass, in addition to improving mechanical properties and corrosion resistance, high hardness. However, the presence of aluminum in brass makes soldering difficult, and soft soldering becomes practically impossible.

Features:

due to high ductility, brass grades L68 and L63 are well stamped and bendable, easily soldered with all types of solders. In electrical engineering, they are widely used for various current-carrying parts;
brass grades LS59-1 and LMTs58-2 are used for the manufacture of rotary (squirrel) cages of electric motors and for current-carrying parts made by hot cutting and stamping; well soldered with various solders;
brass LA67-2,5 is used for cast current-carrying parts of increased mechanical strength and hardness that do not require soft soldering;
brass LK80-ZL and LS59-1L are widely used for cast current-carrying parts of electrical equipment, for brush holders and for casting rotors of asynchronous motors. They accept soldering with various solders well.

Author: Koryakin-Chernyak S.L.

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