Annealed (OS025) C66700 Brass
OS025 C66700 brass is C66700 brass in the OS025 (annealed to 0.025mm grain size) temper. It has the second lowest strength and second highest ductility compared to the other variants of C66700 brass. The graph bars on the material properties cards below compare OS025 C66700 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
110 GPa 16 x 106 psi
Elongation at Break
53 %
Poisson's Ratio
0.31
Rockwell F Hardness
77
Rockwell Superficial 30T Hardness
41
Shear Modulus
41 GPa 6.0 x 106 psi
Shear Strength
260 MPa 38 x 103 psi
Tensile Strength: Ultimate (UTS)
370 MPa 53 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 21 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
140 °C 290 °F
Melting Completion (Liquidus)
1090 °C 2000 °F
Melting Onset (Solidus)
1050 °C 1920 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
97 W/m-K 56 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
17 % IACS
Electrical Conductivity: Equal Weight (Specific)
19 % IACS
Otherwise Unclassified Properties
Base Metal Price
25 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
2.7 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)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
95 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
14 points
Thermal Diffusivity
30 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 68.5 to 71.5 | |
| Zn | 26.3 to 30.7 | |
| Mn | 0.8 to 1.5 | |
| Fe | 0 to 0.1 | |
| Pb | 0 to 0.070 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993