Antimonial Lead is a hard alloy of lead that contains between 1% to 10% antimony. When antimony is mixed with lead, the lead becomes firmer and harder. This alloy is highly resistant to oxidation and corrosion in various environments, forming a protective, impermeable film more rapidly than pure lead.

Its primary commercial use is as cast metal for grids and terminals in lead-acid storage batteries, with antimony content up to 8%, along with approximately 0.25% tin and small amounts of arsenic, copper, and silver. “Maintenance-free” automotive batteries typically feature 1.5% to 3% antimonial-lead negative plates, while positive plates contain 0.04% to 0.06% calcium and around 0.1% tin.

Applications:

• Bullets 

• Storage tank linings

• Radiation shielding

• Storage-battery plates

• Ballasts

• Wheel weights 

• Sheet lead

• Bearings

Lead-based bearing alloys, often referred to as lead-based babbitt metals or white metals, typically consist of antimonial lead combined with varying amounts of tin, copper, and arsenic to enhance strength. A common example used in railroad-car journal bearings contains 86% lead, 9% antimony, and 5% tin. Additionally, many lead alloys incorporate alkaline-earth metals like calcium and sodium, serving as widely used bearing materials. Leaded bronzes contain 4% to 25% lead, with added copper and tin, while some copper-lead bearing alloys contain up to 40% lead. These bearing alloys maintain a degree of softness that prevents bearing damage in case of lubrication failure.

Lead-tin alloy is a common industrial alloy, which is made of lead and tin mixed in a certain proportion. It has the advantages of low melting point, good fluidity, good wear resistance and corrosion resistance, and its strength increases with the increase of tin content, so it has many uses.

Applications:

• Electronics Industry Usage: due to the low melting point of lead-tin alloy, it is very suitable for welding electronic components and circuit boards. Lead-tin alloy can be melted at low temperature, and can perfectly combine with electronic components in the molten state to form a reliable connection. Therefore, it has become one of the most commonly used welding materials in the electronics industry.

• Low-Melting-Point Alloys: lead-tin alloy is also widely used to make alloys with low melting points, such as alloys for safety valves and fuses. Due to the low melting point and plasticity of lead-tin alloy, it can be easily made into parts of various shapes, and it will not melt due to the increase of temperature during use, so it is very practical in the manufacture of these parts.

• Sliding Bearings and Bushings: since lead-tin alloy has good wear resistance and corrosion resistance, it can be used to manufacture these parts that need to withstand high pressure and high-speed motion friction, which can effectively reduce friction loss and extend the service life of the equipment.

• High-Temperature Seals: lead-tin alloy is also used to manufacture various high-temperature seals, such as and valve stems of automobile engines. Since lead-tin alloy has good high-temperature resistance, it is very suitable for manufacturing these seals that need to withstand high temperature and high pressure.

• Chemical Industry Applications: lead-tin alloy is also widely used in the chemical industry, such as seals for chemical equipment and pipelines. Lead-tin alloy has good corrosion resistance and can withstand the erosion of chemical media for a long time, so it has been widely used in these fields.