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EN CC495K (CuSn10Pb10-C) Leaded Tin Bronze

CC495K bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC495K is the EN numeric designation for this material. CuSn10Pb10-C is the EN chemical designation.

It has a fairly low melting temperature among cast bronzes. In addition, it has a fairly low heat capacity and a fairly low ductility.

The graph bars on the material properties cards below compare CC495K 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

76

Elastic (Young's, Tensile) Modulus

100 GPa 15 x 106 psi

Elongation at Break

7.0 %

Poisson's Ratio

0.35

Shear Modulus

37 GPa 5.4 x 106 psi

Tensile Strength: Ultimate (UTS)

240 MPa 34 x 103 psi

Tensile Strength: Yield (Proof)

120 MPa 17 x 103 psi

Thermal Properties

Latent Heat of Fusion

180 J/g

Maximum Temperature: Mechanical

140 °C 290 °F

Melting Completion (Liquidus)

930 °C 1700 °F

Melting Onset (Solidus)

820 °C 1510 °F

Specific Heat Capacity

350 J/kg-K 0.083 BTU/lb-°F

Thermal Conductivity

48 W/m-K 28 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

10 % IACS

Electrical Conductivity: Equal Weight (Specific)

10 % IACS

Otherwise Unclassified Properties

Base Metal Price

33 % relative

Density

9.0 g/cm3 560 lb/ft3

Embodied Carbon

3.6 kg CO2/kg material

Embodied Energy

58 MJ/kg 25 x 103 BTU/lb

Embodied Water

400 L/kg 47 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

14 MJ/m3

Resilience: Unit (Modulus of Resilience)

68 kJ/m3

Stiffness to Weight: Axial

6.2 points

Stiffness to Weight: Bending

17 points

Strength to Weight: Axial

7.3 points

Strength to Weight: Bending

9.4 points

Thermal Diffusivity

15 mm2/s

Thermal Shock Resistance

8.8 points

Alloy Composition

Among cast copper alloys, the composition of CC495K bronze is notable for containing a comparatively high amount of lead (Pb). Lead is used to improve machinability and bearing properties, at the cost of toxicity. It also adds pressure tightness to castings.

Copper (Cu)Cu 76 to 82
Tin (Sn)Sn 9.0 to 11
Lead (Pb)Pb 8.0 to 11
Nickel (Ni)Ni 0 to 2.0
Zinc (Zn)Zn 0 to 2.0
Antimony (Sb)Sb 0 to 0.5
Iron (Fe)Fe 0 to 0.25
Manganese (Mn)Mn 0 to 0.2
Phosphorus (P)P 0 to 0.1
Sulfur (S)S 0 to 0.1
Silicon (Si)Si 0 to 0.010
Aluminum (Al)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