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.
| Cu | 86 to 89 | |
| Zn | 10.7 to 14 | |
| Fe | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 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