EN 1.5535 Steel vs. SAE-AISI 1144 Steel
Both EN 1.5535 steel and SAE-AISI 1144 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.5535 steel and the bottom bar is SAE-AISI 1144 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 130 to 180 | |
| 220 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 22 | |
| 11 to 17 |
| Fatigue Strength, MPa | 210 to 320 | |
| 280 to 430 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 62 to 72 | |
| 34 to 40 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 320 to 370 | |
| 460 to 510 |
| Tensile Strength: Ultimate (UTS), MPa | 450 to 1490 | |
| 750 to 840 |
| Tensile Strength: Yield (Proof), MPa | 300 to 500 | |
| 420 to 690 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 50 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 19 |
| Embodied Water, L/kg | 48 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 45 to 250 | |
| 91 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 240 to 680 | |
| 480 to 1290 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 53 | |
| 27 to 30 |
| Strength to Weight: Bending, points | 17 to 37 | |
| 23 to 25 |
| Thermal Diffusivity, mm2/s | 13 | |
| 14 |
| Thermal Shock Resistance, points | 13 to 44 | |
| 22 to 24 |
Alloy Composition
| Boron (B), % | 0.00080 to 0.0050 | |
| 0 |
| Carbon (C), % | 0.2 to 0.25 | |
| 0.4 to 0.48 |
| Chromium (Cr), % | 0 to 0.3 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 97.6 to 98.9 | |
| 97.5 to 98 |
| Manganese (Mn), % | 0.9 to 1.2 | |
| 1.4 to 1.7 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0.24 to 0.33 |