SAE-AISI 81B45 Steel vs. C87400 Brass
SAE-AISI 81B45 steel belongs to the iron alloys classification, while C87400 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 81B45 steel and the bottom bar is C87400 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 12 to 24 | |
| 21 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 670 | |
| 390 |
| Tensile Strength: Yield (Proof), MPa | 350 to 560 | |
| 160 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 170 |
| Melting Completion (Liquidus), °C | 1460 | |
| 920 |
| Melting Onset (Solidus), °C | 1420 | |
| 820 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 400 |
| Thermal Conductivity, W/m-K | 40 | |
| 28 |
| Thermal Expansion, µm/m-K | 12 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 6.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 7.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 27 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 2.7 |
| Embodied Energy, MJ/kg | 20 | |
| 44 |
| Embodied Water, L/kg | 49 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 110 | |
| 65 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 320 to 840 | |
| 120 |
| Stiffness to Weight: Axial, points | 13 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 19 to 24 | |
| 13 |
| Strength to Weight: Bending, points | 19 to 22 | |
| 14 |
| Thermal Diffusivity, mm2/s | 11 | |
| 8.3 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.8 |
| Boron (B), % | 0.00050 to 0.0030 | |
| 0 |
| Carbon (C), % | 0.43 to 0.48 | |
| 0 |
| Chromium (Cr), % | 0.35 to 0.55 | |
| 0 |
| Copper (Cu), % | 0 | |
| 79 to 85.5 |
| Iron (Fe), % | 97 to 98 | |
| 0 |
| Lead (Pb), % | 0 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0.080 to 0.15 | |
| 0 |
| Nickel (Ni), % | 0.2 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 2.5 to 4.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 12 to 16 |
| Residuals, % | 0 | |
| 0 to 0.8 |