M20 C21000 Brass vs. M20 C28000 Muntz Metal
Both M20 C21000 brass and M20 C28000 Muntz Metal are copper alloys. Both are furnished in the M20 (as hot rolled) condition. They have 66% of their average alloy composition in common.
For each property being compared, the top bar is M20 C21000 brass and the bottom bar is M20 C28000 Muntz Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 100 |
| Elongation at Break, % | 50 | |
| 45 |
| Poisson's Ratio | 0.34 | |
| 0.31 |
| Shear Modulus, GPa | 43 | |
| 40 |
| Shear Strength, MPa | 180 | |
| 230 |
| Tensile Strength: Ultimate (UTS), MPa | 260 | |
| 330 |
| Tensile Strength: Yield (Proof), MPa | 84 | |
| 150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 200 | |
| 170 |
| Maximum Temperature: Mechanical, °C | 190 | |
| 120 |
| Melting Completion (Liquidus), °C | 1070 | |
| 900 |
| Melting Onset (Solidus), °C | 1050 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 390 |
| Thermal Conductivity, W/m-K | 230 | |
| 120 |
| Thermal Expansion, µm/m-K | 18 | |
| 21 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 56 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 57 | |
| 31 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 30 | |
| 23 |
| Density, g/cm3 | 8.8 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.7 |
| Embodied Energy, MJ/kg | 42 | |
| 46 |
| Embodied Water, L/kg | 310 | |
| 320 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 31 | |
| 110 |
| Stiffness to Weight: Axial, points | 7.2 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 18 | |
| 20 |
| Strength to Weight: Axial, points | 8.0 | |
| 11 |
| Strength to Weight: Bending, points | 10 | |
| 13 |
| Thermal Diffusivity, mm2/s | 69 | |
| 40 |
| Thermal Shock Resistance, points | 8.8 | |
| 11 |
Alloy Composition
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| Copper (Cu), % | 94 to 96 | |
| 59 to 63 |
| Iron (Fe), % | 0 to 0.050 | |
| 0 to 0.070 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 to 0.3 |
| Zinc (Zn), % | 3.7 to 6.0 | |
| 36.3 to 41 |
| Residuals, % | 0 to 0.2 | |
| 0 to 0.3 |