EN 1.5525 Steel vs. SAE-AISI 1021 Steel
Both EN 1.5525 steel and SAE-AISI 1021 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.5525 steel and the bottom bar is SAE-AISI 1021 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 130 to 180 | |
| 130 to 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 21 | |
| 17 to 27 |
| Fatigue Strength, MPa | 210 to 310 | |
| 190 to 300 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 62 to 73 | |
| 46 to 54 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 310 to 350 | |
| 310 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 440 to 1440 | |
| 480 to 530 |
| Tensile Strength: Yield (Proof), MPa | 300 to 490 | |
| 260 to 450 |
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 | 50 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 8.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 18 |
| Embodied Water, L/kg | 48 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 44 to 240 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 240 to 640 | |
| 180 to 530 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 51 | |
| 17 to 19 |
| Strength to Weight: Bending, points | 16 to 36 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 13 | |
| 14 |
| Thermal Shock Resistance, points | 13 to 42 | |
| 15 to 17 |
Alloy Composition
| Boron (B), % | 0.00080 to 0.0050 | |
| 0 |
| Carbon (C), % | 0.18 to 0.23 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 0 to 0.3 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 97.7 to 98.9 | |
| 98.8 to 99.22 |
| Manganese (Mn), % | 0.9 to 1.2 | |
| 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 |