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UNS C22600 Jewelry Bronze

C22600 bronze is a bronze formulated for primary forming into wrought products. It has a moderately low embodied energy among wrought bronzes. In addition, it has a moderately high electrical conductivity and a moderately high thermal conductivity.

The properties of C22600 bronze include seven 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 C22600 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

2.5 to 33 %

Poisson's Ratio

0.33

Rockwell B Hardness

46 to 85

Rockwell Superficial 30T Hardness

51 to 77

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

220 to 320 MPa 32 to 47 x 103 psi

Tensile Strength: Ultimate (UTS)

330 to 570 MPa 48 to 82 x 103 psi

Tensile Strength: Yield (Proof)

270 to 490 MPa 39 to 71 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

170 °C 350 °F

Melting Completion (Liquidus)

1040 °C 1900 °F

Melting Onset (Solidus)

1000 °C 1840 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

170 W/m-K 100 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

40 % IACS

Electrical Conductivity: Equal Weight (Specific)

42 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % 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

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

14 to 100 MJ/m3

Resilience: Unit (Modulus of Resilience)

330 to 1070 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

11 to 18 points

Strength to Weight: Bending

12 to 18 points

Thermal Diffusivity

52 mm2/s

Thermal Shock Resistance

11 to 19 points

Alloy Composition

Among wrought copper alloys, the composition of C22600 bronze is notable for containing comparatively high amounts of iron (Fe) and lead (Pb). Iron is used to increase strength inexpensively. Lead is used to improve machinability and bearing properties, at the cost of toxicity.

Copper (Cu) 86 to 89
Zinc (Zn) 10.7 to 14
Iron (Fe) 0 to 0.050
Lead (Pb) 0 to 0.050
Residuals 0 to 0.2

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

Followup Questions

Similar Alloys

Further Reading

ASTM B134: Standard Specification for Brass Wire

ASTM B36: Standard Specification for Brass Plate, Sheet, Strip, And Rolled Bar

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015