C38500 Bronze vs. C69430 Brass
Both C38500 bronze and C69430 brass are copper alloys. They have 71% of their average alloy composition in common.
For each property being compared, the top bar is C38500 bronze and the bottom bar is C69430 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 17 | |
| 17 |
| Poisson's Ratio | 0.31 | |
| 0.33 |
| Shear Modulus, GPa | 37 | |
| 42 |
| Shear Strength, MPa | 230 | |
| 350 |
| Tensile Strength: Ultimate (UTS), MPa | 370 | |
| 570 |
| Tensile Strength: Yield (Proof), MPa | 130 | |
| 280 |
Thermal Properties
| Latent Heat of Fusion, J/g | 160 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 110 | |
| 170 |
| Melting Completion (Liquidus), °C | 890 | |
| 920 |
| Melting Onset (Solidus), °C | 880 | |
| 820 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 410 |
| Thermal Conductivity, W/m-K | 120 | |
| 26 |
| Thermal Expansion, µm/m-K | 21 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 6.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 31 | |
| 6.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 22 | |
| 27 |
| Density, g/cm3 | 8.1 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.7 |
| Embodied Energy, MJ/kg | 45 | |
| 44 |
| Embodied Water, L/kg | 320 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 48 | |
| 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 78 | |
| 340 |
| Stiffness to Weight: Axial, points | 7.0 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 19 | |
| 19 |
| Strength to Weight: Axial, points | 13 | |
| 19 |
| Strength to Weight: Bending, points | 14 | |
| 18 |
| Thermal Diffusivity, mm2/s | 40 | |
| 7.7 |
| Thermal Shock Resistance, points | 12 | |
| 20 |
Alloy Composition
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| Arsenic (As), % | 0 | |
| 0.030 to 0.060 |
| Copper (Cu), % | 55 to 59 | |
| 80 to 83 |
| Iron (Fe), % | 0 to 0.35 | |
| 0 to 0.2 |
| Lead (Pb), % | 2.5 to 3.5 | |
| 0 to 0.3 |
| Silicon (Si), % | 0 | |
| 3.5 to 4.5 |
| Zinc (Zn), % | 36.7 to 42.5 | |
| 11.4 to 16.5 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |