SAE-AISI 8620 Steel vs. ASTM A387 Grade 2 Steel
Both SAE-AISI 8620 steel and ASTM A387 grade 2 steel are iron alloys. Their average alloy composition is basically identical. 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 SAE-AISI 8620 steel and the bottom bar is ASTM A387 grade 2 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 210 | |
| 140 to 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 13 to 31 | |
| 25 |
| Fatigue Strength, MPa | 270 to 360 | |
| 190 to 250 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 340 to 420 | |
| 300 to 350 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 690 | |
| 470 to 550 |
| Tensile Strength: Yield (Proof), MPa | 360 to 570 | |
| 260 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 420 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 45 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 2.6 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.6 |
| Embodied Energy, MJ/kg | 20 | |
| 20 |
| Embodied Water, L/kg | 50 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 86 to 150 | |
| 98 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 340 to 880 | |
| 180 to 320 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 24 | |
| 16 to 20 |
| Strength to Weight: Bending, points | 18 to 22 | |
| 17 to 19 |
| Thermal Diffusivity, mm2/s | 10 | |
| 12 |
| Thermal Shock Resistance, points | 15 to 20 | |
| 14 to 16 |
Alloy Composition
| Carbon (C), % | 0.18 to 0.23 | |
| 0.050 to 0.21 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0.5 to 0.8 |
| Iron (Fe), % | 96.9 to 98 | |
| 97.1 to 98.3 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0.55 to 0.8 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0.45 to 0.6 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.15 to 0.4 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.025 |