ASTM A302 Alloy Steel vs. ASTM A285 Carbon Steel
Both ASTM A302 alloy steel and ASTM A285 carbon steel are iron alloys.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is ASTM A285 carbon steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 110 to 130 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 23 | |
| 30 to 34 |
| Fatigue Strength, MPa | 250 to 280 | |
| 150 to 180 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 370 to 390 | |
| 250 to 290 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 380 to 450 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 190 to 230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 to 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 53 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 8.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 1.8 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 1.4 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 18 |
| Embodied Water, L/kg | 48 to 50 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 94 to 150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 13 to 16 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 15 to 17 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 14 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 12 to 14 |