ASTM A387 Grade 21 Steel vs. ASTM A588 Steel
Both ASTM A387 grade 21 steel and ASTM A588 steel are iron alloys. There are 31 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 ASTM A387 grade 21 steel and the bottom bar is ASTM A588 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 21 | |
| 22 |
| Fatigue Strength, MPa | 160 to 250 | |
| 270 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 73 |
| Shear Strength, MPa | 310 to 370 | |
| 350 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 590 | |
| 550 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 to 260 |
| Maximum Temperature: Mechanical, °C | 480 | |
| 410 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1430 | |
| 1410 to 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 41 | |
| 43 to 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.1 | |
| 2.3 to 2.5 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 23 | |
| 20 to 22 |
| Embodied Water, L/kg | 62 | |
| 50 to 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 110 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 320 | |
| 400 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 20 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 19 |
| Thermal Diffusivity, mm2/s | 11 | |
| 12 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 16 |