EN 1.5521 Steel vs. EN 1.5503 Steel
Both EN 1.5521 steel and EN 1.5503 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.5521 steel and the bottom bar is EN 1.5503 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 130 to 180 | |
| 120 to 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 21 | |
| 12 to 17 |
| Fatigue Strength, MPa | 210 to 310 | |
| 180 to 280 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 59 to 72 | |
| 63 to 72 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 310 to 360 | |
| 270 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 430 to 1390 | |
| 400 to 520 |
| Tensile Strength: Yield (Proof), MPa | 300 to 490 | |
| 270 to 430 |
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 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.1 |
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 | 44 to 230 | |
| 41 to 81 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 250 to 630 | |
| 200 to 490 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 15 to 49 | |
| 14 to 19 |
| Strength to Weight: Bending, points | 16 to 35 | |
| 15 to 18 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 13 to 41 | |
| 12 to 15 |
Alloy Composition
| Boron (B), % | 0.00080 to 0.0050 | |
| 0.00080 to 0.0050 |
| Carbon (C), % | 0.16 to 0.2 | |
| 0.16 to 0.2 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.25 |
| Iron (Fe), % | 98 to 98.9 | |
| 98.4 to 99.239 |
| Manganese (Mn), % | 0.9 to 1.2 | |
| 0.6 to 0.8 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.3 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.025 |