SAE-AISI 8740 Steel vs. EN 1.7386 Steel
Both SAE-AISI 8740 steel and EN 1.7386 steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is EN 1.7386 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 200 | |
| 170 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 23 | |
| 18 to 21 |
| Fatigue Strength, MPa | 270 to 350 | |
| 170 to 290 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Shear Strength, MPa | 370 to 400 | |
| 340 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 670 | |
| 550 to 670 |
| Tensile Strength: Yield (Proof), MPa | 380 to 570 | |
| 240 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 600 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 39 | |
| 26 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 2.0 |
| Embodied Energy, MJ/kg | 20 | |
| 28 |
| Embodied Water, L/kg | 50 | |
| 88 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 92 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 to 850 | |
| 150 to 490 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 20 to 24 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 10 | |
| 6.9 |
| Thermal Shock Resistance, points | 17 to 20 | |
| 15 to 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.040 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 8.0 to 10 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 86.8 to 90.5 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.25 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.010 |