ThePipingMart Blog Grades UNS C62500 Aluminum Bronze – Composition, Properties And Uses

UNS C62500 Aluminum Bronze – Composition, Properties And Uses

UNS C62500 Aluminum Bronze

When choosing the right materials for your manufacturing processes, understanding the different properties of each type of metal can help guarantee a well-produced, reliable end product. UNS C62500 aluminium bronze is an alloy gaining popularity due to its excellent corrosion-resistant properties and high strength and ductility. Here, we’ll dive into the composition, physical and mechanical properties, uses, and more.

UNS C62500 Aluminum Bronze Composition

UNS C62500 aluminium bronze comprises copper, aluminium, iron, nickel, and manganese. These elements are meticulously combined in specific proportions to strengthen the alloy and give it its corrosion-resistant properties. Generally, this bronze comprises about 77.0 – 79.5% copper, 5.5 – 7.5% aluminium, 3.0 – 5.0% nickel, and 2.0 – 4.0% iron, with the remaining amount being manganese.

Element Content (%)
Copper, Cu 82.7
Aluminium, Al 12.5-13.5
Iron, Fe 3.5-5.0
Manganese, Mn ≤2.0
Other ≤0.5

UNS C62500 Aluminum Bronze Physical Properties

This alloy has a relatively high density and a melting point of about 1040°C. It also shows a low coefficient of linear thermal expansion, resulting in its resistance to the thermal expansion that can arise with temperature changes. It’s a great conductor of thermal conductivity, making it an ideal choice for industrial and electrical applications. In addition, this bronze is known for its excellent resistance to wear and tear.

Properties Metric Imperial
Density 7.21 g/cc 0.260 lb/in³
Melting point 1047°C 1917°F

UNS C62500 Aluminum Bronze Mechanical Properties

UNS C62500 aluminium bronze has excellent mechanical properties. It boasts high strength and ductility, allowing manufacturers to shape and form the alloy. It has a yield strength of about 300 MPa and a tensile strength of around 800 MPa. The high elongation properties of this alloy make it an excellent option for heavy manufacturing industries, such as the production of marine equipment.

Properties Metric Imperial
Hardness, Rockwell C 27 27
Tensile strength (M30 and O61 tempers) 690 MPa 100000 psi
Yield strength (M30 and O61 tempers) 380 MPa 55100 psi
Elongation at break (in 50 mm, 1% reduction in area) 1.00% 1.00%
Elastic modulus 117 GPa 17000 ksi
Compressive yield strength (at permanent set of 0.1%) 450 MPa 65300 psi
Compressive yield strength (at permanent set of 1%) 880 MPa 128000 psi
Poisson’s ratio 0.34 0.34
Charpy impact (@ 18.0 – 100°C/ -0.400 – 212°F, keyhole) 3.00 J 2.21 ft-lb
Izod impact (@ 18.0 – 100°C/ -0.400 – 212°F) 3.00 J 2.21 ft-lb
Fatigue strength (@# of cycles 1.00e+8, M30 temper) 460 MPa 66700 psi
Machinability (UNS C36000 (free-cutting brass) = 100) 20 20
Shear modulus 42.3 GPa 6140 ksi

UNS C62500 Aluminum Bronze Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@ 20-300°C/68-572°F) 16.2 µm/m°C 9.00 µin/in°F
Thermal conductivity (@ 20°C/ 68°F) 38.9 W/mK 270 BTU in/hr.ft².°F

UNS C62500 Aluminum Bronze Uses

UNS C62500 aluminium bronze is utilized in a wide range of industrial settings. It’s commonly used to manufacture industrial piping, marine engines, and valve parts, among other things. It’s also a suitable and popular choice for high-stress applications in jet engine manufacturing. Additionally, it’s a great alternative for leaded-bronze alloys, making it an excellent choice for producing brackets, bushings, and various electrical components that generally require high-strength properties.

UNS C62500 Aluminum Bronze Hardness

This alloy has high hardness, ranging from 150 to 250 HB, making it an outstanding metal for machinery wear components. Its superior strength makes it the best-preferred alloy for manufacturing heavy industrial gears.

UNS C62500 Aluminum Bronze Heat Treatment

UNS C62500 aluminium bronze does not require heat treatment. It’s recommended to anneal the alloy in its final phase to promote easy machining.

UNS C62500 Aluminum Bronze Welding

Welding a UNS C62500 Aluminum Bronze is feasible, but it cannot be easy. To prevent cracking, fusion welding is preferred over gas-shielded arc welding. If welding is necessary, it’s essential to employ matching filler metals to guarantee that their thermal expansion coefficients are close.

UNS C62500 Aluminum Bronze Corrosion Resistance

The alloy is naturally corrosion-resistant, forming an oxide layer on the surface. UNS C62500 aluminium bronze has excellent resistance to seawater, biofouling, and corrosion, making it suitable for marine environments.


UNS C62500 aluminium bronze alloy is a fantastic metal for industrial and electrical applications. The alloy’s superb mechanical and physical properties make it an excellent alternative to leaded-bronze alloys, and its resistance to seawater and corrosion makes it perfect for marine environments. Maintaining the right welding procedures and matching filler metals is critical to avoid significant rework or damage to the final product. Regardless of the specific type of manufacturing, UNS C62500 aluminium bronze is a great choice for creating high-quality, reliable products.

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