EN 1.5502 Steel vs. SAE-AISI 1055 Steel
Both EN 1.5502 steel and SAE-AISI 1055 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.5502 steel and the bottom bar is SAE-AISI 1055 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 120 to 160 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 20 | |
| 11 to 14 |
| Fatigue Strength, MPa | 190 to 290 | |
| 260 to 390 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 62 to 76 | |
| 34 to 45 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 280 to 330 | |
| 440 to 450 |
| Tensile Strength: Ultimate (UTS), MPa | 400 to 1380 | |
| 730 to 750 |
| Tensile Strength: Yield (Proof), MPa | 270 to 440 | |
| 400 to 630 |
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 | 52 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 18 |
| Embodied Water, L/kg | 47 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 41 to 210 | |
| 80 to 85 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 200 to 520 | |
| 440 to 1070 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 14 to 49 | |
| 26 |
| Strength to Weight: Bending, points | 15 to 35 | |
| 23 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 12 to 40 | |
| 23 to 24 |
Alloy Composition
| Boron (B), % | 0.00080 to 0.0050 | |
| 0 |
| Carbon (C), % | 0.15 to 0.2 | |
| 0.5 to 0.6 |
| Chromium (Cr), % | 0 to 0.3 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 98 to 99.249 | |
| 98.4 to 98.9 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 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 |