ASTM A302 Alloy Steel vs. AISI 422 Stainless Steel
Both ASTM A302 alloy steel and AISI 422 stainless steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is AISI 422 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 260 to 330 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 20 to 23 | |
| 15 to 17 |
| Fatigue Strength, MPa | 250 to 280 | |
| 410 to 500 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Shear Strength, MPa | 370 to 390 | |
| 560 to 660 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 910 to 1080 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 670 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 650 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1420 | |
| 1470 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 24 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 4.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 5.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 11 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 3.1 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 44 |
| Embodied Water, L/kg | 48 to 50 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 1140 to 1910 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 32 to 38 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 26 to 30 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 6.4 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 33 to 39 |