M30 C67400 Bronze vs. M30 C69300 Brass
Both M30 C67400 bronze and M30 C69300 brass are copper alloys. Both are furnished in the M30 (as hot extruded) condition. They have 81% of their average alloy composition in common.
For each property being compared, the top bar is M30 C67400 bronze and the bottom bar is M30 C69300 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 26 | |
| 15 |
| Poisson's Ratio | 0.31 | |
| 0.32 |
| Rockwell B Hardness | 78 | |
| 84 |
| Shear Modulus, GPa | 41 | |
| 41 |
| Shear Strength, MPa | 350 | |
| 330 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 550 |
| Tensile Strength: Yield (Proof), MPa | 280 | |
| 300 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 160 |
| Melting Completion (Liquidus), °C | 890 | |
| 880 |
| Melting Onset (Solidus), °C | 870 | |
| 860 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 400 |
| Thermal Conductivity, W/m-K | 100 | |
| 38 |
| Thermal Expansion, µm/m-K | 21 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 23 | |
| 8.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 26 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 26 |
| Density, g/cm3 | 7.9 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.7 |
| Embodied Energy, MJ/kg | 48 | |
| 45 |
| Embodied Water, L/kg | 330 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 70 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 | |
| 400 |
| Stiffness to Weight: Axial, points | 7.5 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 20 | |
| 19 |
| Strength to Weight: Axial, points | 19 | |
| 19 |
| Strength to Weight: Bending, points | 19 | |
| 18 |
| Thermal Diffusivity, mm2/s | 32 | |
| 12 |
| Thermal Shock Resistance, points | 18 | |
| 19 |
Alloy Composition
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| Aluminum (Al), % | 0.5 to 2.0 | |
| 0 |
| Copper (Cu), % | 57 to 60 | |
| 73 to 77 |
| Iron (Fe), % | 0 to 0.35 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 to 0.5 | |
| 0 to 0.090 |
| Manganese (Mn), % | 2.0 to 3.5 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 to 0.25 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 | |
| 0.040 to 0.15 |
| Silicon (Si), % | 0.5 to 1.5 | |
| 2.7 to 3.4 |
| Tin (Sn), % | 0 to 0.3 | |
| 0 to 0.2 |
| Zinc (Zn), % | 31.1 to 40 | |
| 18.4 to 24.3 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |