ThePipingMart Blog Grades UNS C61300 Aluminum Bronze – Composition, Properties And Uses

UNS C61300 Aluminum Bronze – Composition, Properties And Uses

UNS C61300 Aluminum Bronze

Aluminium bronze is a family of high-strength copper-based alloys with excellent corrosion resistance and durability. One particular aluminium bronze alloy that stands out is UNS C61300, which possesses unique properties that make it highly sought after in various industrial applications. This blog post will closely examine UNS C61300 aluminium bronze, its composition, physical and mechanical properties, uses, hardness, heat treatment, welding capabilities, and corrosion-resistant properties. So, let’s dive in!

UNS C61300 Aluminum Bronze Composition

UNS C61300 aluminium bronze is a type of wrought copper alloy that contains approximately 80% copper, 9-10% aluminium, 5-6% iron, 3-4% nickel, and traces of manganese, silicon, and zinc. The aluminium content in C61300 aluminium bronze helps to enhance its strength and corrosion resistance, while the iron and nickel provide additional mechanical properties.

Element Content (%)
Copper, Cu 88.5-91.5
Aluminium, Al 6.0-7.5
Iron, Fe 2.0-3.0
Tin, Sn 0.02-0.05
Manganese, Mn ≤0.1
Zinc, Zn ≤0.05
Lead, Pb ≤0.01
Other ≤0.05

UNS C61300 Aluminum Bronze Physical Properties

UNS C61300 aluminium bronze has excellent physical properties, with a density of 7.7 g/cm³, a melting point of 1000°C, a thermal conductivity of 55 W/mK, and a specific heat capacity of 390 J/kgK. It is also highly ductile and malleable, making it easy to form and shape into various components.

Properties Metric Imperial
Density 7.89 g/cc 0.285 lb/in³
Melting point 1040°C 1905°F

UNS C61300 Aluminum Bronze Mechanical Properties

UNS C61300 aluminium bronze exhibits exceptional mechanical properties, including high tensile strength, yield strength, and hardness. It has a tensile strength of 690 MPa, yield strength of 400 MPa, and a Brinell hardness of 180-220 HB. These properties make it ideal for heavy-duty applications requiring high strength, toughness, and wear resistance.

Properties Metric Imperial
Tensile strength 540 MPa 78300 psi
Yield strength 240 MPa 34800 psi
Elongation at break 35.00% 35.00%
Reduction of area 25.00% 25.00%
Izod impact 54.0 – 66.0 J 39.8 – 48.7 ftlb
Fatigue strength 180 MPa 26100 psi
Shear modulus 44.0 GPa 6380 ksi
Elastic modulus 117 GPa 16969 ksi
Poisson’s ratio 0.34 0.34

UNS C61300 Aluminum Bronze Thermsl 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) 56.5 W/mK 392 BTUin/hr.ft².°F

UNS C61300 Aluminum Bronze Equivalent

  • ASTM B111
  • ASTM B150
  • ASTM B169
  • ASTM B171
  • ASTM B315
  • ASTM B432
  • ASTM B608
  • ASTM F467
  • ASTM F468
  • QQ C450
  • UNS C61300

UNS C61300 Aluminum Bronze Uses

UNS C61300 aluminium bronze is used in various industries, including aerospace, marine, automotive, and industrial applications. It’s excellent corrosion resistance and high strength-to-weight ratio make it an ideal material for manufacturing gears, bearings, valves, bushings, and other critical components. It’s also used in propellers, shipbuilding, and offshore drilling equipment due to its ability to withstand harsh marine environments.

UNS C61300 Aluminum Bronze Hardness

UNS C61300 aluminium bronze is a very hard material with a Brinell hardness of 180-220 HB. This high hardness level makes it ideal for applications requiring excellent wear resistance and strength, such as heavy-duty machinery and equipment.

UNS C61300 Aluminum Bronze Heat Treatment and Welding

UNS C61300 aluminium bronze can withstand heat treatment and is often annealed or tempered to improve its mechanical properties. It also has good welding properties and can be easily welded using conventional welding techniques, such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).

UNS C61300 Aluminum Bronze Corrosion Resistance

UNS C61300 aluminium bronze has excellent corrosion resistance properties, perfecting it for harsh environments. It is resistant to saltwater corrosion, industrial chemicals, and atmospheric corrosion. These properties make it a preferred material for manufacturing marine components, chemical processing, and offshore oil and gas equipment.


In conclusion, UNS C61300 aluminium bronze is a high-strength copper-based alloy with unique properties that make it an ideal material for various industrial applications. Its excellent corrosion resistance, high strength, and durability make it an excellent choice for manufacturing heavy-duty components such as bearings, gears, valves, and other critical machinery. It is also highly resistant to harsh marine environments, industrial chemicals, and atmospheric corrosion, making it suitable for offshore oil and gas equipment and chemical processing. Its better physical and mechanical properties, high hardness with heat treatment and good welding capabilities make it one of the most versatile alloys in the copper family. So, if you’re looking for a high-strength, durable, and corrosion-resistant material for your next project, UNS C61300 aluminium bronze might be a perfect choice.

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