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EN CC482K (CuSn11Pb2-C) Leaded Tin Bronze

CC482K bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC482K is the EN numeric designation for this material. CuSn11Pb2-C is the EN chemical designation.

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

The graph bars on the material properties cards below compare CC482K 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

99

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

5.6 %

Poisson's Ratio

0.34

Shear Modulus

40 GPa 5.8 x 106 psi

Tensile Strength: Ultimate (UTS)

300 MPa 43 x 103 psi

Tensile Strength: Yield (Proof)

160 MPa 24 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

160 °C 330 °F

Melting Completion (Liquidus)

980 °C 1800 °F

Melting Onset (Solidus)

860 °C 1590 °F

Specific Heat Capacity

360 J/kg-K 0.087 BTU/lb-°F

Thermal Conductivity

64 W/m-K 37 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

8.8 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)

14 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 kJ/m3

Stiffness to Weight: Axial

6.8 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.5 points

Strength to Weight: Bending

11 points

Thermal Diffusivity

20 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Among cast copper alloys, the composition of CC482K bronze is notable for containing comparatively high amounts of tin (Sn) and lead (Pb). 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. Lead is used to improve machinability and bearing properties, at the cost of toxicity. It also adds pressure tightness to castings.

Copper (Cu) 83.5 to 87
Tin (Sn) 10.5 to 12.5
Lead (Pb) 0.7 to 2.5
Nickel (Ni) 0 to 2.0
Zinc (Zn) 0 to 2.0
Phosphorus (P) 0 to 0.4
Manganese (Mn) 0 to 0.2
Iron (Fe) 0 to 0.2
Antimony (Sb) 0 to 0.2
Sulfur (S) 0 to 0.080
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