ASTM A27 Cast Steel vs. SAE-AISI 4340 Steel
Both ASTM A27 cast steel and SAE-AISI 4340 steel are iron alloys. There are 29 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 ASTM A27 cast steel and the bottom bar is SAE-AISI 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 to 27 | |
| 12 to 22 |
| Fatigue Strength, MPa | 170 to 230 | |
| 330 to 740 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 550 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 230 to 310 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 430 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 52 | |
| 44 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 to 7.1 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 3.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.7 |
| Embodied Energy, MJ/kg | 18 | |
| 22 |
| Embodied Water, L/kg | 45 to 46 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 96 to 120 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 260 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 20 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 14 | |
| 12 |
| Thermal Shock Resistance, points | 15 to 18 | |
| 20 to 38 |