Soft Annealed (O60) C34500 Brass
O60 C34500 brass is C34500 brass in the O60 (soft annealed) temper. It has the lowest strength and highest ductility compared to the other variants of C34500 brass. The graph bars on the material properties cards below compare O60 C34500 brass to: wrought brasses (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
100 GPa 15 x 106 psi
Elongation at Break
28 %
Poisson's Ratio
0.31
Shear Modulus
40 GPa 5.7 x 106 psi
Shear Strength
220 MPa 32 x 103 psi
Tensile Strength: Ultimate (UTS)
340 MPa 49 x 103 psi
Tensile Strength: Yield (Proof)
120 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
170 J/g
Maximum Temperature: Mechanical
120 °C 250 °F
Melting Completion (Liquidus)
910 °C 1670 °F
Melting Onset (Solidus)
890 °C 1630 °F
Specific Heat Capacity
380 J/kg-K 0.091 BTU/lb-°F
Thermal Conductivity
120 W/m-K 67 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
26 % IACS
Electrical Conductivity: Equal Weight (Specific)
29 % IACS
Otherwise Unclassified Properties
Base Metal Price
24 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
45 MJ/kg 19 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
75 MJ/m3
Resilience: Unit (Modulus of Resilience)
69 kJ/m3
Stiffness to Weight: Axial
7.1 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
13 points
Thermal Diffusivity
37 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
| Cu | 62 to 65 | |
| Zn | 32 to 36.5 | |
| Pb | 1.5 to 2.5 | |
| Fe | 0 to 0.15 | |
| res. | 0 to 0.4 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B453: Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Rod, Bar, and Shapes
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001