MakeItFrom.com
Menu (ESC)

UNS C66100 Leaded Silicon Bronze

C66100 bronze is a bronze formulated for primary forming into wrought products. It has the lowest thermal conductivity and a moderately low embodied energy among wrought bronzes.

The properties of C66100 bronze include five 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 C66100 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

120 GPa 17 x 106 psi

Elongation at Break

8.0 to 40 %

Poisson's Ratio

0.34

Shear Modulus

43 GPa 6.2 x 106 psi

Shear Strength

280 to 460 MPa 40 to 67 x 103 psi

Tensile Strength: Ultimate (UTS)

410 to 790 MPa 60 to 110 x 103 psi

Tensile Strength: Yield (Proof)

120 to 430 MPa 17 to 62 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1050 °C 1930 °F

Melting Onset (Solidus)

1000 °C 1830 °F

Specific Heat Capacity

400 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

34 W/m-K 19 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Density

8.7 g/cm3 540 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

42 MJ/kg 18 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

53 to 120 MJ/m3

Resilience: Unit (Modulus of Resilience)

60 to 790 kJ/m3

Stiffness to Weight: Axial

7.4 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

13 to 25 points

Strength to Weight: Bending

14 to 22 points

Thermal Diffusivity

9.7 mm2/s

Thermal Shock Resistance

15 to 29 points

Alloy Composition

Among wrought copper alloys, the composition of C66100 bronze is notable for including silicon (Si) and manganese (Mn). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy. Manganese is used to improve strength without a proportional reduction in ductility.

Copper (Cu) 92 to 97
Silicon (Si) 2.8 to 3.5
Manganese (Mn) 0 to 1.5
Zinc (Zn) 0 to 1.5
Lead (Pb) 0.2 to 0.8
Iron (Fe) 0 to 0.25
Residuals 0 to 0.5

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

Followup Questions

Similar Alloys

Further Reading

ASTM B98: Standard Specification for Copper-Silicon Alloy Rod, Bar and Shapes

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001