What is popular brass? What is special brass? What is the difference between popular brass and special brass? At first, we came to understand the brass. Brass is an alloy of copper and zinc. Brass is often used to make valves, water pipes, air conditioners, and radiators. Brass has strong wear resistance properties. The seamless copper tube drawn from brass is soft and wear resistant. Brass seamless tubes are available for heat exchangers and condensers, high temperature piping, and subsea transportation pipes. Manufacture of sheet, strip, bar, pipe, forging machine, etc. The copper content is 62% to 68%, and the plasticity is strong, and the pressure-resistant equipment is manufactured. The definition of popular brass and special brass

Popular brass world

Brass can be divided into two types: popular brass and special brass. Brass has superior plasticity and corrosion resistance, superior deformation processing properties and forging properties, and has a strong application cost in the property. According to the differences in chemical composition, brass can be divided into two types: popular brass and special brass. The so-called popular brass is a copper-zinc binary alloy.

Special brass industry

Brass can be divided into two types: common brass and special brass. In order to obtain higher strength, corrosion resistance and superior forging properties, aluminum, iron, silicon, manganese, nickel and other elements are added to the copper-zinc alloy to A variety of alloys composed of two or more elements are called special brass.

Chemical composition of popular brass compared to special brass

Popular brass chemical composition

It is an alloy of copper and zinc.

When the zinc content is less than 35%, zinc can be dissolved in copper to form a single phase, which is called single-phase brass, which has good plasticity and is suitable for cold and hot press processing.

When the zinc content is 36%~46%, there is a single-phase copper-zinc-based β solid solution, which is called duplex brass. The β phase reduces the plasticity of the brass and the tensile strength rises, which is only suitable for heat. Pressure processing

If the quality of zinc is increased, the tensile strength is reduced and there is no application cost.

The code name is expressed in "H+ number", H is brass, and the number represents the quality score of copper.

For example, H68 exhibits a copper content of 68% and a zinc content of 32%. Forged brass is preceded by a "Z" code, such as ZH62.

For example, Zcuzn38 exhibits a forged brass with a zinc content of 38% and a balance of copper.

H90, H80 single phase, golden yellow, so there is a total of gold, called plating, decorations, medals and so on.

H68 and H59 are duplex brass and are widely used in structural parts such as bolts, nuts, washers and springs.

As usual, cold-deformed processing uses duplex brass for single-phase brass thermal deformation processing.

Special brass chemical composition

A multi-component alloy consisting of the remaining alloying elements added to the popular brass is called brass. Commonly added elements are lead, tin, aluminum, etc., responsively can be called lead brass, tin brass, aluminum brass. The goal of adding alloying elements. Important is to improve tensile strength and improve processability

Code: “H+ main plus element symbol (except zinc) + copper quality score + main plus element quality score + remaining element quality score” performance.

For example, HPb59-1 exhibits a copper quality score of 59%, a lead content of 1% with lead plus elemental lead, and a balance of zinc lead. Comparison of the use and characteristics of popular brass and special brass

Popular brass use and features

The differences in the popular brass trademarks are also different in terms of use, so let's talk carefully.

1. H59 popular brass features: the cheapest price, high strength, high hardness and poor plasticity, but it can still be well subjected to pressure processing in the hot state, corrosion resistance is just as usual, and the rest of the properties are adjacent to H62.

H59 popular brass use: used for the same ordinary mechanical machine, welding parts, hot punching and hot-rolling machine.

2, H62 popular brass characteristics: has superior mechanical properties, good plasticity in the hot state, plasticity in the cold state can also be, good machinability, easy brazing and welding, corrosion resistance, but prone to corrosion break. The rest of the price is cheap, a popular brass variety of applied habits.

H62 popular brass use: for all kinds of deep extension and bending manufacturing of the whole machine, such as pins, rivets, washers, nuts, conduits, barometer springs, screens, radiators and so on.

3, H63 popular brass features: suitable for cold pressure processing, suitable for stopping welding and brazing. Easy to polish, it is an important alloy to stop drawing, twisting, twisting and other molding.

H63 popular brass use: for round rollers for screws and pickling.

4, H65 popular brass features: the nature between H68 and H62, the price is cheaper than H68, also has higher strength and plasticity, can be excellently subjected to cold, hot pressure processing, corrosion cracking bias.

H65 popular brass use: for hardware, daily necessities, small springs, screws, rivets and mechanical machines.

5, H68 popular brass features: extremely superior plasticity (the best in brass) and high strength, good cutting properties, easy to weld, the same normal corrosion non-bearing, but prone to cracking. It is one of the most widely used varieties of popular brass.

H68 popular brass use: for complex cold and deep-drawn parts, such as radiator shells, ducts, bellows, shells, gaskets, etc.

6, H70 popular brass features: extremely superior plasticity (the best in brass) and high strength, good cutting properties, easy to weld, the same normal corrosion non-bearing, but prone to cracking.

H70 popular brass use: for complex cold stamping and deep-drawing parts, such as radiator shell, duct, bellows, shell, gasket.

7, H75 popular brass features: have a very good mechanical properties, process properties and corrosion resistance. It is well pressed in hot and cold conditions. It is between H80 and H70 in nature and economy.

H75 popular brass use: for low load corrosion resistant springs.

8, H80 popular brass characteristics: the nature and H85 similar, but higher strength, plasticity is better, in the atmosphere, salt water and salt water has a higher corrosion resistance.

H80 popular brass use: used in paper nets, thin-walled tubes, bellows and house construction supplies.

9, H85 popular brass features: high strength, good plasticity, can be well subjected to cold, hot pressure processing, welding and corrosion resistance properties.

H85 popular brass use: for condensation and heat dissipation tubes, siphons, serpentine tubes, cooling equipment parts.

10, H90 popular brass features: the nature is similar to H96, but the intensity is slightly higher than H96, can be plated with metal to squeeze the enamel.

H90 popular brass use: for water supply and drainage pipes, medals, art, water tank belts and bimetals.

11, H96 popular brass features: the strength is higher than copper (but in the popular brass, it is the lowest), heat conduction, electrical conductivity, high corrosion resistance in the atmosphere and then, and superior plasticity, Easy to process cold and hot pressure, easy to weld, forge and tin, no stress corrosion cracking bias.

H96 popular brass use: used as a conduit, condenser, radiator tube, heat sink, car water tank belt and conductive machine in the same ordinary machinery manufacturing.

Special brass use and features

Tin Brass: Tin can significantly improve the corrosion resistance of brass in the terrestrial atmosphere and salt water, and can also improve the strength of brass. Press-processed tin brass is widely used in the manufacture of sea-going vessels.

Lead Brass: Lead can improve the processing properties and improve wear resistance. . Lead has little effect on the strength of brass, slightly low plasticity. Press-processed lead brass is important for requesting complete machines with superior machinability and wear resistance (such as timepieces), and forged lead brass can be used to make bushings and bushings.

Aluminum Brass: Aluminum improves the strength and hardness of brass, but makes plasticity low. Aluminum can form a protective oxide film on the outside of the brass, thus improving the corrosion resistance of the brass in the atmosphere. Aluminum brass can be used to manufacture the whole ship and other machines. After adding an appropriate amount of nickel, manganese and iron to aluminum brass, special brass with high strength and high corrosion resistance can be obtained. It is rarely used for the manufacture of large worms, sea-going propellers and other important high-strength and high-corrosion resistance. machine.

Silicon Brass: Silicon can significantly improve the mechanical properties, wear resistance and corrosion resistance of brass. Silicon brass has superior forging properties and can stop welding and cutting. Important for the manufacture of ships and chemical machinery.

Manganese Brass: Manganese can improve the strength of brass, not low plasticity, but also improve the corrosion resistance in salt water and superheated steam. Manganese brass is rarely used in the manufacture of wear-resistant parts such as sea-going vessels and bearings.

Iron Brass: Adding iron to brass and adding a large amount of manganese can improve the recrystallization temperature of the brass and refine the grain, improve the mechanical properties, and at the same time make the brass have high toughness and wear resistance. And excellent corrosion resistance in the atmosphere and salt water, so iron brass can be used to manufacture the whole machine that is subject to friction and salt water corrosion.

Nickel Brass: Nickel improves the recrystallization temperature of brass and refines its grains, improves mechanical properties and corrosion resistance, and reduces stress corrosion cracking bias. Nickel brass has excellent thermal processing properties and is widely used in shipbuilding property and electromechanical manufacturing property.