ASTM A302 Alloy Steel vs. ASTM A204 Steel
Both ASTM A302 alloy steel and ASTM A204 steel are iron alloys.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is ASTM A204 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 23 | |
| 18 to 22 |
| Fatigue Strength, MPa | 250 to 280 | |
| 200 to 220 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 370 to 390 | |
| 330 to 360 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 520 to 590 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 290 to 330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 410 |
| 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 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 2.4 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 1.5 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 20 |
| Embodied Water, L/kg | 48 to 50 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 90 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 220 to 290 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 14 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 15 to 17 |