EN 1.7720 Steel vs. EN 1.5535 Steel
Both EN 1.7720 steel and EN 1.5535 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is EN 1.7720 steel and the bottom bar is EN 1.5535 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 | |
| 130 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 11 to 22 |
| Fatigue Strength, MPa | 230 | |
| 210 to 320 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 590 | |
| 450 to 1490 |
| Tensile Strength: Yield (Proof), MPa | 340 | |
| 300 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 40 | |
| 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 1.9 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 1.4 |
| Embodied Energy, MJ/kg | 30 | |
| 19 |
| Embodied Water, L/kg | 51 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 97 | |
| 45 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 300 | |
| 240 to 680 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 | |
| 16 to 53 |
| Strength to Weight: Bending, points | 20 | |
| 17 to 37 |
| Thermal Diffusivity, mm2/s | 11 | |
| 13 |
| Thermal Shock Resistance, points | 17 | |
| 13 to 44 |
Alloy Composition
| Boron (B), % | 0 | |
| 0.00080 to 0.0050 |
| Carbon (C), % | 0.1 to 0.15 | |
| 0.2 to 0.25 |
| Chromium (Cr), % | 0.3 to 0.5 | |
| 0 to 0.3 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 to 0.25 |
| Iron (Fe), % | 96.6 to 98.6 | |
| 97.6 to 98.9 |
| Manganese (Mn), % | 0.4 to 0.7 | |
| 0.9 to 1.2 |
| Molybdenum (Mo), % | 0.4 to 0.6 | |
| 0 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.45 | |
| 0 to 0.3 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.025 |
| Vanadium (V), % | 0.22 to 0.3 | |
| 0 |