SAE-AISI M3 Class 2 Steel vs. ASTM A302 Alloy Steel
Both SAE-AISI M3 class 2 steel and ASTM A302 alloy 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 M3 class 2 steel and the bottom bar is ASTM A302 alloy 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 | 77 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 2210 | |
| 590 to 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Melting Completion (Liquidus), °C | 1620 | |
| 1460 |
| Melting Onset (Solidus), °C | 1570 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 39 to 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 25 | |
| 2.4 to 3.0 |
| Density, g/cm3 | 8.3 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 12 | |
| 1.5 to 1.6 |
| Embodied Energy, MJ/kg | 180 | |
| 20 to 21 |
| Embodied Water, L/kg | 110 | |
| 48 to 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 74 | |
| 21 to 22 |
| Strength to Weight: Bending, points | 22 to 45 | |
| 20 to 21 |
| Thermal Diffusivity, mm2/s | 7.2 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 24 to 69 | |
| 17 to 18 |