EN 1.5502 Steel vs. SAE-AISI 1137 Steel
Both EN 1.5502 steel and SAE-AISI 1137 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.5502 steel and the bottom bar is SAE-AISI 1137 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 120 to 160 | |
| 200 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 20 | |
| 11 to 17 |
| Fatigue Strength, MPa | 190 to 290 | |
| 250 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 62 to 76 | |
| 34 to 39 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 280 to 330 | |
| 430 to 460 |
| Tensile Strength: Ultimate (UTS), MPa | 400 to 1380 | |
| 700 to 760 |
| Tensile Strength: Yield (Proof), MPa | 270 to 440 | |
| 370 to 650 |
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 | 52 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 10 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 12 |
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 | 47 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 41 to 210 | |
| 81 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 200 to 520 | |
| 360 to 1130 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 14 to 49 | |
| 25 to 27 |
| Strength to Weight: Bending, points | 15 to 35 | |
| 22 to 24 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 12 to 40 | |
| 21 to 23 |
Alloy Composition
| Boron (B), % | 0.00080 to 0.0050 | |
| 0 |
| Carbon (C), % | 0.15 to 0.2 | |
| 0.32 to 0.39 |
| Chromium (Cr), % | 0 to 0.3 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 98 to 99.249 | |
| 97.8 to 98.3 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 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 | |
| 0.080 to 0.13 |