ASTM A302 Alloy Steel vs. ASTM A225 Steel
Both ASTM A302 alloy steel and ASTM A225 steel are iron alloys.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is ASTM A225 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 190 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 23 | |
| 21 to 23 |
| Fatigue Strength, MPa | 250 to 280 | |
| 330 to 390 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 370 to 390 | |
| 390 to 520 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 620 to 830 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 460 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 2.3 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 24 to 25 |
| Embodied Water, L/kg | 48 to 50 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 120 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 580 to 820 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 22 to 29 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 21 to 25 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 14 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 18 to 24 |