ASTM A732 Cast Steel vs. ASTM A387 Grade 21 Steel
Both ASTM A732 cast steel and ASTM A387 grade 21 steel are iron alloys. There are 30 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 ASTM A732 cast steel and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 440 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 4.0 to 25 | |
| 21 |
| Fatigue Strength, MPa | 230 to 750 | |
| 160 to 250 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 to 73 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 1470 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 310 to 1340 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 to 260 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 400 to 430 | |
| 480 |
| Melting Completion (Liquidus), °C | 1440 to 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 to 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 to 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 to 50 | |
| 41 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 to 7.7 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.9 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.0 to 3.8 | |
| 4.1 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 to 1.7 | |
| 1.8 |
| Embodied Energy, MJ/kg | 19 to 24 | |
| 23 |
| Embodied Water, L/kg | 47 to 54 | |
| 62 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 45 to 130 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 4770 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 52 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 17 to 37 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 11 |
| Thermal Shock Resistance, points | 14 to 43 | |
| 14 to 17 |