SAE-AISI H21 Steel vs. ASTM A204 Steel
Both SAE-AISI H21 steel and ASTM A204 steel are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is ASTM A204 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 720 to 1790 | |
| 520 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Melting Completion (Liquidus), °C | 1630 | |
| 1470 |
| Melting Onset (Solidus), °C | 1580 | |
| 1420 to 1430 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 27 | |
| 52 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 2.4 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 4.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 68 | |
| 20 |
| Embodied Water, L/kg | 72 | |
| 47 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 58 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 21 to 38 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 7.1 | |
| 14 |
| Thermal Shock Resistance, points | 24 to 59 | |
| 15 to 17 |