EN 1.0303 Steel vs. SAE-AISI 1039 Steel
Both EN 1.0303 steel and SAE-AISI 1039 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.0303 steel and the bottom bar is SAE-AISI 1039 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 84 to 120 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 25 | |
| 14 to 18 |
| Fatigue Strength, MPa | 150 to 230 | |
| 230 to 370 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 75 to 86 | |
| 40 to 45 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 220 to 260 | |
| 380 to 420 |
| Tensile Strength: Ultimate (UTS), MPa | 290 to 410 | |
| 610 to 690 |
| Tensile Strength: Yield (Proof), MPa | 200 to 320 | |
| 340 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 53 | |
| 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 6.9 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.9 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 1.8 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 18 | |
| 18 |
| Embodied Water, L/kg | 46 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 30 to 94 | |
| 88 to 94 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 110 to 270 | |
| 310 to 890 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 10 to 15 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 12 to 16 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 9.2 to 13 | |
| 19 to 22 |
Alloy Composition
| Aluminum (Al), % | 0.020 to 0.060 | |
| 0 |
| Carbon (C), % | 0.020 to 0.060 | |
| 0.37 to 0.44 |
| Iron (Fe), % | 99.335 to 99.71 | |
| 98.5 to 98.9 |
| Manganese (Mn), % | 0.25 to 0.4 | |
| 0.7 to 1.0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.050 |