EN 1.7003 Steel vs. EN 1.7321 Steel
Both EN 1.7003 steel and EN 1.7321 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.7003 steel and the bottom bar is EN 1.7321 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 200 | |
| 150 to 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 1780 | |
| 490 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 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 | 46 | |
| 45 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.0 | |
| 2.5 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 20 |
| Embodied Water, L/kg | 48 | |
| 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 63 | |
| 17 to 52 |
| Strength to Weight: Bending, points | 18 to 42 | |
| 18 to 36 |
| Thermal Diffusivity, mm2/s | 12 | |
| 12 |
| Thermal Shock Resistance, points | 15 to 53 | |
| 14 to 43 |
Alloy Composition
| Carbon (C), % | 0.35 to 0.42 | |
| 0.17 to 0.23 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0.3 to 0.6 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 97.7 to 98.8 | |
| 97.1 to 98.4 |
| Manganese (Mn), % | 0.5 to 0.8 | |
| 0.7 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.4 to 0.5 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.3 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.025 |