SAE-AISI 4340M Steel vs. ASTM A414 Steel
Both SAE-AISI 4340M steel and ASTM A414 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is ASTM A414 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 110 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 15 to 26 |
| Fatigue Strength, MPa | 690 | |
| 140 to 260 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 1360 | |
| 230 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 360 to 590 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 190 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 400 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 49 to 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 7.2 to 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 8.3 to 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 2.2 |
| Density, g/cm3 | 7.8 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 26 | |
| 20 to 22 |
| Embodied Water, L/kg | 55 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 69 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 100 to 330 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 84 | |
| 13 to 21 |
| Strength to Weight: Bending, points | 51 | |
| 14 to 20 |
| Thermal Diffusivity, mm2/s | 10 | |
| 13 |
| Thermal Shock Resistance, points | 70 | |
| 11 to 17 |