SAE-AISI 8740 Steel vs. C71580 Copper-nickel
SAE-AISI 8740 steel belongs to the iron alloys classification, while C71580 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is C71580 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 200 | |
| 75 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 140 |
| Elongation at Break, % | 11 to 23 | |
| 40 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 51 |
| Shear Strength, MPa | 370 to 400 | |
| 230 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 670 | |
| 330 |
| Tensile Strength: Yield (Proof), MPa | 380 to 570 | |
| 110 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 230 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1180 |
| Melting Onset (Solidus), °C | 1420 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 400 |
| Thermal Conductivity, W/m-K | 39 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 4.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 4.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 41 |
| Density, g/cm3 | 7.8 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 5.1 |
| Embodied Energy, MJ/kg | 20 | |
| 74 |
| Embodied Water, L/kg | 50 | |
| 280 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 to 850 | |
| 47 |
| Stiffness to Weight: Axial, points | 13 | |
| 8.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 10 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 12 |
| Thermal Diffusivity, mm2/s | 10 | |
| 11 |
| Thermal Shock Resistance, points | 17 to 20 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.070 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 |
| Copper (Cu), % | 0 | |
| 65.5 to 71 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 29 to 33 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.050 |
| Residuals, % | 0 | |
| 0 to 0.5 |