ASTM A225 Steel vs. ASTM A203 Steel
Both ASTM A225 steel and ASTM A203 steel are iron alloys.
For each property being compared, the top bar is ASTM A225 steel and the bottom bar is ASTM A203 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 250 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 21 to 23 | |
| 22 to 26 |
| Fatigue Strength, MPa | 330 to 390 | |
| 210 to 280 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 390 to 520 | |
| 330 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 830 | |
| 520 to 590 |
| Tensile Strength: Yield (Proof), MPa | 460 to 550 | |
| 290 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| 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 | 52 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.4 to 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.5 to 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 3.2 to 4.0 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.6 to 1.7 |
| Embodied Energy, MJ/kg | 24 to 25 | |
| 21 to 23 |
| Embodied Water, L/kg | 48 | |
| 50 to 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 170 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 to 820 | |
| 230 to 410 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 29 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 21 to 25 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 18 to 24 | |
| 15 to 17 |