C69300 Brass vs. C28000 Muntz Metal
Both C69300 brass and C28000 Muntz Metal are copper alloys. They have 83% of their average alloy composition in common.
For each property being compared, the top bar is C69300 brass and the bottom bar is C28000 Muntz Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 100 |
| Elongation at Break, % | 8.5 to 15 | |
| 10 to 45 |
| Poisson's Ratio | 0.32 | |
| 0.31 |
| Rockwell B Hardness | 84 to 88 | |
| 55 to 78 |
| Shear Modulus, GPa | 41 | |
| 40 |
| Shear Strength, MPa | 330 to 370 | |
| 230 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 550 to 630 | |
| 330 to 610 |
| Tensile Strength: Yield (Proof), MPa | 300 to 390 | |
| 150 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 240 | |
| 170 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 120 |
| Melting Completion (Liquidus), °C | 880 | |
| 900 |
| Melting Onset (Solidus), °C | 860 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 390 |
| Thermal Conductivity, W/m-K | 38 | |
| 120 |
| Thermal Expansion, µm/m-K | 19 | |
| 21 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.0 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 31 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 23 |
| Density, g/cm3 | 8.2 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 2.7 |
| Embodied Energy, MJ/kg | 45 | |
| 46 |
| Embodied Water, L/kg | 310 | |
| 320 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 47 to 70 | |
| 27 to 240 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 to 700 | |
| 110 to 670 |
| Stiffness to Weight: Axial, points | 7.4 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 19 | |
| 20 |
| Strength to Weight: Axial, points | 19 to 21 | |
| 11 to 21 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 13 to 20 |
| Thermal Diffusivity, mm2/s | 12 | |
| 40 |
| Thermal Shock Resistance, points | 19 to 22 | |
| 11 to 20 |
Alloy Composition
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| Copper (Cu), % | 73 to 77 | |
| 59 to 63 |
| Iron (Fe), % | 0 to 0.1 | |
| 0 to 0.070 |
| Lead (Pb), % | 0 to 0.090 | |
| 0 to 0.3 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 |
| Nickel (Ni), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0.040 to 0.15 | |
| 0 |
| Silicon (Si), % | 2.7 to 3.4 | |
| 0 |
| Tin (Sn), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 18.4 to 24.3 | |
| 36.3 to 41 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.3 |