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Tuesday 28th March 2023
Copper Casting Alloy(UNS C94800) – Composition, Uses and Properties
By ridgexmetals.com

Copper Casting Alloy(UNS C94800) – Composition, Uses and Properties

Copper Casting Alloy(UNS C94800) – Composition, Uses and Properties

Copper casting alloys provide a combination of physical and mechanical properties that make them ideal for production in cast components. One such alloy is UNS C94800, composed of copper, tin, and zinc. In this blog post, we’ll look in-depth at the composition, mechanical properties, physical properties, and uses of UNS C94800.

C94800 Composition

UNS C94800 consists of 92% copper, 7% tin and 1% zinc. This composition gives excellent alloy strength and wears resistance while maintaining good machinability. A container’s presence also helps improve the alloy’s corrosion resistance. It should be noted that this alloy is not suitable for welding due to its high zinc content.

Element Content (%)
Cu 87
Sn 5
Ni 5

C94800 Mechanical Properties

The mechanical properties of UNS C94800 are as follows: Tensile Strength – 80 ksi (552 MPa); Yield Strength – 32 ksi (220 MPa); Elongation – 10%; Hardness Brinell – 75; Modulus of Elasticity – 14 x 106 psi (97 GPa). These properties make it an ideal choice for high-strength and wear-resistance applications such as valve bodies and pump components.

Properties Metric Imperial
Hardness, Brinell (as cast; 500 kg) 80 80
Hardness, Brinell (heat treated; 500 kg) 120 120
Tensile strength (as cast) 310 MPa 45000 psi
Tensile trength (heat treated) 414 MPa 60000 psi
Yield strength (as cast) 159 MPa 23100 psi
Yield strength (heat treated) 207 MPa 30000 psi
Elongation at break (heat treated) 8.00% 8.00%
Elongation at break (as cast) 35.00% 35.00%
Machinability (heat treated; UNS C36000 (free-cutting brass) = 100) 40 40
Machinability (as cast; UNS C36000 (free-cutting brass) = 100) 50 50
Poisson’s ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ks

C94800 Physical Properties

The physical properties of UNS C94800 are as follows: Density – 0.281 lb/in3 (8.89 g/cm3); Melting Point – 1750°F (954°C); Specific Heat – 0.096 Btu/lb-°F (400 J/kg-K). These properties allow for effortless machining and forming during manufacturing processes.

Properties Metric Imperial
Density 8.60 g/cm3 0.311 lb/in³

C94800 Equivalents

  • ASTM B30
  • ASTM B505
  • ASTM B584
  • ASTM B763
  • QQ C390
  • SAE J461
  • SAE J462

C94800 Uses

Due to its excellent combination of strength, wear resistance, corrosion resistance, machinability and formability, UNS C94800 is often used in producing valves, pumps, pipe fittings and other cast components requiring these attributes. It is also commonly used in automotive applications due to its ability to resist corrosion in harsh environments.


In conclusion, copper casting alloy UNS C94800 is a great option when you need a material that combines strength and wears resistance with good machinability and formability characteristics. Its composition makes it ideal for automotive applications where it can withstand harsh conditions without rusting or degrading over time. For those looking for a reliable casting material with these qualities, UNS C94800 may be just what you’re looking for!

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  • 08/02/2023

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