The properties of hot-rolled lead brass rod products are between continuous casting and extrusion. There are more manpower needed in the production process, because in recent years, the rising cost of manpower is gradually being eliminated by the market. Similarly, it is usually divided into continuous casting lead brass rod, hot-rolled lead brass rod and extruded lead brass rod according to the manufacturing process. Lead-containing brass rods are widely used. The smaller the particle size of lead, the more uniform the distribution and the better the properties. With the development of scientific techniques, the lead content of conventional lead brass rods has increased from 0.8% to 2.5% to more than 5%. New lead-containing copper rods, brass rods, bronze rods and white brass rods are being developed continuously.

Lead brass rod is commonly known as cutting brass rod, because of its superior cutting ability, it is called free cutting brass rod.

Continuous casting lead brass rod is a relatively poor copper rod in the market, but because of its low price, it is widely used in hardware and water heating. Lead brass is single phase at low temperature (above 500 C). It has excellent hot working properties and can undergo large thermal deformation, while it is a phase and a + P phase at room temperature. It has high deformation resistance and poor plasticity during cold deformation. Excessive processing rate will cause cracks in alloy materials. Commonly trademark copper rods are extruded copper rods. In particular, it should be pointed out that lead-containing copper alloys are highly adaptable to materials and can indirectly utilize recycled copper production, which is extremely important for copper processing enterprises.

Trademarks of lead brass bars: HPB58-3, HPB59-1, H62-3, C3604, C3602, etc.

Effect of Lead on Brass Bars

Extruded lead brass bars are also usually of strong tensile properties, straightness and toughness, which are superior in all aspects. They are seldom used in automobile and motorcycle parts, electronics, medical equipment and other high request areas.

With the improvement of technology, people have invented lead-containing copper and alloys in use, leaching out of lead and purifying the environment. Research on lead-free free free-cutting brass bars with excellent Machinable properties is opening up. In particular, the substitution title of lead-containing brass bars which are widely used has been put on the agenda. Among the elements that can be considered are secret, sulphur, silicon and so on. Lead-containing copper and alloys can be used as-cast and processed under pressure. Lead has no significant effect on the conductivity and thermal conductivity of lead brass rods, but it can improve the machinability. Lead particles are solid phase, which is the desired soft phase for bearing materials. Lead brass rods are valuable free cutting materials and bearing materials, because of their high cost, they are more popular in the market.

Liquid lead, which is not compatible with copper liquid, forms a monotectic structure when it solidifies. In solid state, lead disperses in the state of elementary matter in copper, and can disperse in grain and grain boundaries. Lead-containing brass rods can transfer lead from grain boundaries to grain boundaries when phase transformation or recrystallization occurs.