EN 1.5521 Steel vs. EN 1.8550 Steel
Both EN 1.5521 steel and EN 1.8550 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is EN 1.5521 steel and the bottom bar is EN 1.8550 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 130 to 180 | |
| 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 21 | |
| 11 |
| Fatigue Strength, MPa | 210 to 310 | |
| 470 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 310 to 360 | |
| 600 |
| Tensile Strength: Ultimate (UTS), MPa | 430 to 1390 | |
| 1000 |
| Tensile Strength: Yield (Proof), MPa | 300 to 490 | |
| 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 440 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 51 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 3.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.7 |
| Embodied Energy, MJ/kg | 19 | |
| 23 |
| Embodied Water, L/kg | 47 | |
| 67 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 44 to 230 | |
| 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 250 to 630 | |
| 1550 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 15 to 49 | |
| 36 |
| Strength to Weight: Bending, points | 16 to 35 | |
| 29 |
| Thermal Diffusivity, mm2/s | 14 | |
| 11 |
| Thermal Shock Resistance, points | 13 to 41 | |
| 29 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.8 to 1.2 |
| Boron (B), % | 0.00080 to 0.0050 | |
| 0 |
| Carbon (C), % | 0.16 to 0.2 | |
| 0.3 to 0.37 |
| Chromium (Cr), % | 0 | |
| 1.5 to 1.8 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 98 to 98.9 | |
| 94.4 to 96.3 |
| Manganese (Mn), % | 0.9 to 1.2 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 | |
| 0.85 to 1.2 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.035 |