EN 1.1122 Steel vs. SAE-AISI 1049 Steel
Both EN 1.1122 steel and SAE-AISI 1049 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1122 steel and the bottom bar is SAE-AISI 1049 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 100 to 130 | |
| 200 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 21 | |
| 11 to 17 |
| Fatigue Strength, MPa | 170 to 260 | |
| 250 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 63 to 73 | |
| 34 to 46 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 240 to 290 | |
| 420 to 450 |
| Tensile Strength: Ultimate (UTS), MPa | 340 to 460 | |
| 680 to 750 |
| Tensile Strength: Yield (Proof), MPa | 240 to 370 | |
| 370 to 640 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 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 | 51 | |
| 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.0 | |
| 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 | 36 to 89 | |
| 75 to 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 to 360 | |
| 370 to 1090 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 12 to 16 | |
| 24 to 27 |
| Strength to Weight: Bending, points | 14 to 17 | |
| 22 to 23 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 11 to 15 | |
| 22 to 24 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.12 | |
| 0.46 to 0.53 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 98.7 to 99.62 | |
| 98.5 to 98.9 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.6 to 0.9 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.050 |