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UNS C63600 Aluminum-Silicon Bronze

C63600 bronze is a bronze formulated for primary forming into wrought products. It can have a moderately high ductility and a moderately low tensile strength among wrought bronzes.

The properties of C63600 bronze include three 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 C63600 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 16 x 106 psi

Elongation at Break

30 to 66 %

Poisson's Ratio


Rockwell B Hardness

71 to 84

Shear Modulus

42 GPa 6.2 x 106 psi

Shear Strength

320 to 360 MPa 46 to 52 x 103 psi

Tensile Strength: Ultimate (UTS)

410 to 540 MPa 60 to 79 x 103 psi

Tensile Strength: Yield (Proof)

150 to 260 MPa 22 to 38 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

210 °C 400 °F

Melting Completion (Liquidus)

1030 °C 1890 °F

Melting Onset (Solidus)

980 °C 1800 °F

Specific Heat Capacity

410 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

57 W/m-K 33 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

12 % IACS

Electrical Conductivity: Equal Weight (Specific)

13 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative


8.6 g/cm3 540 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

45 MJ/kg 20 x 103 BTU/lb

Embodied Water

340 L/kg 40 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

98 to 290 MJ/m3

Resilience: Unit (Modulus of Resilience)

100 to 300 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

13 to 18 points

Strength to Weight: Bending

14 to 17 points

Thermal Diffusivity

16 mm2/s

Thermal Shock Resistance

15 to 20 points

Alloy Composition

Among wrought copper alloys, the composition of C63600 bronze is notable for including arsenic (As) and aluminum (Al). Arsenic is used to protect the alloy against dezincification. Aluminum is used to add strength and oxidation resistance.

Copper (Cu)Cu 93 to 96.3
Aluminum (Al)Al 3.0 to 4.0
Silicon (Si)Si 0.7 to 1.3
Zinc (Zn)Zn 0 to 0.5
Tin (Sn)Sn 0 to 0.2
Nickel (Ni)Ni 0 to 0.15
Iron (Fe)Fe 0 to 0.15
Arsenic (As)As 0 to 0.15
Lead (Pb)Pb 0 to 0.050
Residualsres. 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