Phosphor bronze

Phosphor Bronze

Phosphor bronze is a type of alloy consisting of copper, tin and phosphorus with a wide range of uses in many industries such as the electrical, automotive, shipbuilding and aerospace sectors.

Phosphor bronze is renowned for its resistance to corrosion, high electrical and thermal conductivity, strength and formability. It is widely used for making components that must be reliable, exact and strong. For example, it is commonly used for making lock and key components, electric contacts, springs, aircraft fittings and other components for machine parts.

Due to its chemical composition and varied uses, phosphor bronze has been used for centuries. It was first developed in 1833 by Charles-Eugène Delépine, a French metallurgist. Delépines experiments involved mixing nickel-copper, tin and phosphorus together at temperatures between 400 and 700°C to create a new alloy.

Today, phosphor bronze is manufactured with computer-controlled centrifuges to apply a uniform mixture of molten steel. This technology allows for precise measurements of the different elements that go into the alloy, making it possible to create different grades.

Most phosphor bronze is manufactured using magnesium (Mg) and phosphorous (P) in proportion to the other elements: copper (Cu), nickel (Ni) and tin (Sn). The proportions and grades of phosphor bronze vary depending on the primary purpose such as applications requiring extra strength, electrical conductivity or corrosion resistance.

Some of the most common grades of phosphor bronze used today include C51820, C95400 and C50000. C51820 has one of the highest strengths and conductivities among the phosphor bronzes thanks to the high phosphorus levels. C95400 is a high-strength, low-cost bronze that is often used for parts in which a minimum of flexibility is needed. C50000 contains higher copper and tin levels, which makes it highly corrosion-resistant and strong.

In addition to its numerous industrial uses, phosphor bronze has become increasingly common in coin production and metalwork for sculptures and jewellery. It is easy to wear and shape, allowing metalworkers to craft beautiful creations that are sure to last.

Overall, phosphor bronze is a durable and versatile alloy with a variety of applications. Thanks to the many benefits this alloy offers, it has been used for centuries, and will likely continue to be used well into the future.