UNS C40500 Penny Bronze
C40500 penny bronze is a bronze formulated for primary forming into wrought products. It can have a moderately low tensile strength among wrought bronzes. In addition, it has a moderately high electrical conductivity and a moderately high thermal conductivity.
The properties of C40500 penny bronze include nine common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C40500 penny bronze to: wrought 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
Elastic (Young's, Tensile) Modulus
110 GPa 17 x 106 psi
Elongation at Break
3.0 to 49 %
Poisson's Ratio
0.34
Rockwell B Hardness
46 to 82
Rockwell Superficial 30T Hardness
10 to 72
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
210 to 310 MPa 31 to 45 x 103 psi
Tensile Strength: Ultimate (UTS)
270 to 540 MPa 39 to 78 x 103 psi
Tensile Strength: Yield (Proof)
79 to 520 MPa 12 to 76 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1020 °C 1880 °F
Specific Heat Capacity
380 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
160 W/m-K 95 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
41 % IACS
Electrical Conductivity: Equal Weight (Specific)
42 % IACS
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.8 g/cm3 550 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
43 MJ/kg 19 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
16 to 110 MJ/m3
Resilience: Unit (Modulus of Resilience)
28 to 1200 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
8.5 to 17 points
Strength to Weight: Bending
10 to 17 points
Thermal Diffusivity
48 mm2/s
Thermal Shock Resistance
9.5 to 19 points
Alloy Composition
Among wrought copper alloys, the composition of C40500 penny bronze is notable for including tin (Sn). Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.
| Cu | 94 to 96 | |
| Zn | 2.1 to 5.3 | |
| Sn | 0.7 to 1.3 | |
| Fe | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993