AWS E308H vs. ASTM A302 Alloy Steel
Both AWS E308H and ASTM A302 alloy steel are iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is AWS E308H and the bottom bar is ASTM A302 alloy steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 40 | |
| 20 to 23 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 620 | |
| 590 to 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 39 to 51 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.2 to 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 8.2 to 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 2.4 to 3.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 46 | |
| 20 to 21 |
| Embodied Water, L/kg | 150 | |
| 48 to 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 22 | |
| 21 to 22 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 21 |
| Thermal Diffusivity, mm2/s | 4.2 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 16 | |
| 17 to 18 |