ThePipingMart Blog Grades Copper Casting Alloy (UNS C90801) – Composition, Properties and Uses

Copper Casting Alloy (UNS C90801) – Composition, Properties and Uses

Copper Casting Alloy UNS C90801

UNS C90801 is a copper-based alloy that has a wide range of uses and benefits. From its composition to its mechanical and physical properties, this alloy has numerous advantages for industrial applications. Let’s take a closer look at why copper casting alloy UNS C90800 should be your go-to material for your next project.


Cu C90801 is composed primarily of copper (90%), with the remainder being made up of lead (8%) and tin (2%). This combination creates an alloy that is strong, durable, and resistant to corrosion, making it an ideal choice for many applications. Additionally, copper-casting alloys are also temperature-resistant, allowing them to withstand high and low temperatures.

Element Content (%)
Copper, Cu 87
Tin, Sn 12
Phosphorus, P 0.2

Mechanical Properties

When it comes to mechanical properties, copper casting alloys have excellent strength in both tension and compression due to their high tensile strength and yield strength. They are also highly ductile and malleable, which makes them easy to work with when forming or machining components from the material. And because they are so strong, they can easily hold their shape after being formed into complex shapes or components.

Mechanical Properties Metric Imperial
Hardness, Brinell (500kg) 95 95
Tensile strength, ultimate ≥ 345 MPa ≥ 50000 psi
Tensile strength, yield ≥ 145 MPa ≥ 21000 psi
Elongation at break ≥ 12.0 % ≥ 12.0 %
Poisson’s ratio 0.34 0.34
Elastic modulus 117 GPa 16969.4 ksi

Physical Properties

The physical properties of copper-casting alloys make them great for various industries, including automotive, aerospace, plumbing, electrical wiring, and more. The material is non-magnetic, which makes it perfect for building devices that need to function without interference from magnetic fields, such as electrical motors or generators. It’s also non-conductive, so it won’t interfere with any electrical current running through it. Furthermore, the material is very lightweight yet retains its structural integrity even when subjected to extreme temperatures or pressures.

Properties Metric Imperial
Density 8.67 g/cc 0.313 lb/in³


  • ASTM B30
  • ASTM B427


Due to its many beneficial qualities mentioned above, copper casting alloys are used in a variety of industries, including automotive manufacturing, where they are used for engine parts and exhaust systems; aerospace, where they are used in airframes; plumbing, where they are used in pipes; and electrical wiring where they are used in circuit boards or other electronic components. In addition to these uses, the material can also be found in sculptures or jewellery due to its unique appearance when cast into shapes.


Overall, there are many advantages of using copper-casting alloys like UNS C90801 for your next project or application. From its composition and mechanical properties to its physical properties, and it operates across various industries, this type of alloy has numerous benefits that make it the clear choice for your next endeavour. With its versatile nature combined with strength, durability, resistance to corrosion and temperature changes – you can be sure that you’ve chosen the right material for whatever job you have planned! Intended Audience: Business owners looking for a reliable metal casting solution for their projects.

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