C28500 Muntz Metal vs. C69300 Brass
Both C28500 Muntz Metal and C69300 brass are copper alloys. They have 80% of their average alloy composition in common.
For each property being compared, the top bar is C28500 Muntz Metal and the bottom bar is C69300 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 20 | |
| 8.5 to 15 |
| Poisson's Ratio | 0.3 | |
| 0.32 |
| Rockwell B Hardness | 150 | |
| 84 to 88 |
| Shear Modulus, GPa | 40 | |
| 41 |
| Shear Strength, MPa | 320 | |
| 330 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 520 | |
| 550 to 630 |
| Tensile Strength: Yield (Proof), MPa | 380 | |
| 300 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 170 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 110 | |
| 160 |
| Melting Completion (Liquidus), °C | 900 | |
| 880 |
| Melting Onset (Solidus), °C | 890 | |
| 860 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 400 |
| Thermal Conductivity, W/m-K | 100 | |
| 38 |
| Thermal Expansion, µm/m-K | 21 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 29 | |
| 8.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 33 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 22 | |
| 26 |
| Density, g/cm3 | 7.9 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 2.7 |
| Embodied Energy, MJ/kg | 46 | |
| 45 |
| Embodied Water, L/kg | 320 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 94 | |
| 47 to 70 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 700 | |
| 400 to 700 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 20 | |
| 19 |
| Strength to Weight: Axial, points | 18 | |
| 19 to 21 |
| Strength to Weight: Bending, points | 18 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 33 | |
| 12 |
| Thermal Shock Resistance, points | 17 | |
| 19 to 22 |
Alloy Composition
| Copper (Cu), % | 57 to 59 | |
| 73 to 77 |
| Iron (Fe), % | 0 to 0.35 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 to 0.25 | |
| 0 to 0.090 |
| Manganese (Mn), % | 0 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 | |
| 0.040 to 0.15 |
| Silicon (Si), % | 0 | |
| 2.7 to 3.4 |
| Tin (Sn), % | 0 | |
| 0 to 0.2 |
| Zinc (Zn), % | 39.5 to 43 | |
| 18.4 to 24.3 |
| Residuals, % | 0 | |
| 0 to 0.5 |