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EN CC483K (CuSn12-C) Tin Bronze

CC483K bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC483K is the EN numeric designation for this material. CuSn12-C is the EN chemical designation.

It has a fairly high base cost among cast bronzes. In addition, it has a fairly high embodied energy and a fairly low ductility.

The graph bars on the material properties cards below compare CC483K bronze to: cast bronzes (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

97

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

6.4 %

Poisson's Ratio

0.34

Shear Modulus

40 GPa 5.9 x 106 psi

Tensile Strength: Ultimate (UTS)

310 MPa 45 x 103 psi

Tensile Strength: Yield (Proof)

170 MPa 24 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 330 °F

Melting Completion (Liquidus)

990 °C 1820 °F

Melting Onset (Solidus)

870 °C 1600 °F

Specific Heat Capacity

370 J/kg-K 0.088 BTU/lb-°F

Thermal Conductivity

68 W/m-K 39 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

10 % IACS

Otherwise Unclassified Properties

Base Metal Price

36 % relative

Density

8.7 g/cm3 550 lb/ft3

Embodied Carbon

3.8 kg CO2/kg material

Embodied Energy

62 MJ/kg 27 x 103 BTU/lb

Embodied Water

400 L/kg 48 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

17 MJ/m3

Resilience: Unit (Modulus of Resilience)

130 kJ/m3

Stiffness to Weight: Axial

6.9 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.9 points

Strength to Weight: Bending

12 points

Thermal Diffusivity

21 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Among cast copper alloys, the composition of CC483K bronze is notable for containing a comparatively high amount of tin (Sn) and including manganese (Mn). Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media. It also places certain constraints on cast part design, so as to avoid porosity problems. Manganese is used to improve strength without a proportional reduction in ductility.

Copper (Cu) 85 to 89
Tin (Sn) 10.5 to 13
Nickel (Ni) 0 to 2.0
Lead (Pb) 0 to 0.7
Phosphorus (P) 0 to 0.6
Zinc (Zn) 0 to 0.5
Manganese (Mn) 0 to 0.2
Iron (Fe) 0 to 0.2
Antimony (Sb) 0 to 0.15
Sulfur (S) 0 to 0.050
Silicon (Si) 0 to 0.010
Aluminum (Al) 0 to 0.010

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 1982: Copper and copper alloys - Ingots and castings