OS025 C33200 Brass vs. OS025 C66700 Brass
Both OS025 C33200 brass and OS025 C66700 brass are copper alloys. Both are furnished in the OS025 (annealed to 0.025mm grain size) temper. They have a very high 95% of their average alloy composition in common.
For each property being compared, the top bar is OS025 C33200 brass and the bottom bar is OS025 C66700 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 50 | |
| 53 |
| Poisson's Ratio | 0.31 | |
| 0.31 |
| Rockwell F Hardness | 75 | |
| 77 |
| Rockwell Superficial 30T Hardness | 37 | |
| 41 |
| Shear Modulus, GPa | 40 | |
| 41 |
| Shear Strength, MPa | 260 | |
| 260 |
| Tensile Strength: Ultimate (UTS), MPa | 360 | |
| 370 |
| Tensile Strength: Yield (Proof), MPa | 150 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 170 | |
| 180 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 140 |
| Melting Completion (Liquidus), °C | 930 | |
| 1090 |
| Melting Onset (Solidus), °C | 900 | |
| 1050 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 390 |
| Thermal Conductivity, W/m-K | 120 | |
| 97 |
| Thermal Expansion, µm/m-K | 20 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 26 | |
| 17 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 28 | |
| 19 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 24 | |
| 25 |
| Density, g/cm3 | 8.2 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.7 |
| Embodied Energy, MJ/kg | 44 | |
| 45 |
| Embodied Water, L/kg | 320 | |
| 320 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 110 | |
| 95 |
| Stiffness to Weight: Axial, points | 7.1 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 19 | |
| 19 |
| Strength to Weight: Axial, points | 12 | |
| 12 |
| Strength to Weight: Bending, points | 14 | |
| 14 |
| Thermal Diffusivity, mm2/s | 37 | |
| 30 |
| Thermal Shock Resistance, points | 12 | |
| 12 |
Alloy Composition
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| Copper (Cu), % | 65 to 68 | |
| 68.5 to 71.5 |
| Iron (Fe), % | 0 to 0.070 | |
| 0 to 0.1 |
| Lead (Pb), % | 1.5 to 2.5 | |
| 0 to 0.070 |
| Manganese (Mn), % | 0 | |
| 0.8 to 1.5 |
| Zinc (Zn), % | 29 to 33.5 | |
| 26.3 to 30.7 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.5 |