EN 1.8915 Steel vs. EN 1.8903 Steel
Both EN 1.8915 steel and EN 1.8903 steel are iron alloys. Both are furnished in the normalized condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.8915 steel and the bottom bar is EN 1.8903 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 | |
| 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 19 |
| Fatigue Strength, MPa | 340 | |
| 330 |
| Impact Strength: V-Notched Charpy, J | 79 | |
| 58 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 400 | |
| 390 |
| Tensile Strength: Ultimate (UTS), MPa | 640 | |
| 630 |
| Tensile Strength: Yield (Proof), MPa | 490 | |
| 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| 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 | 46 | |
| 46 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.5 | |
| 2.6 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 1.8 |
| Embodied Energy, MJ/kg | 24 | |
| 24 |
| Embodied Water, L/kg | 51 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 640 | |
| 620 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 | |
| 22 |
| Strength to Weight: Bending, points | 21 | |
| 21 |
| Thermal Diffusivity, mm2/s | 12 | |
| 12 |
| Thermal Shock Resistance, points | 19 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0.020 to 0.050 | |
| 0 to 0.015 |
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.22 |
| Chromium (Cr), % | 0 to 0.3 | |
| 0 to 0.35 |
| Copper (Cu), % | 0 to 0.7 | |
| 0 to 0.6 |
| Iron (Fe), % | 95.2 to 98.9 | |
| 95 to 99.05 |
| Manganese (Mn), % | 1.1 to 1.7 | |
| 1.0 to 1.8 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0 to 0.13 |
| Nickel (Ni), % | 0 to 0.8 | |
| 0 to 0.85 |
| Niobium (Nb), % | 0 to 0.050 | |
| 0 to 0.060 |
| Nitrogen (N), % | 0 to 0.025 | |
| 0 to 0.027 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.65 |
| Sulfur (S), % | 0 to 0.0080 | |
| 0 to 0.025 |
| Titanium (Ti), % | 0 to 0.030 | |
| 0 to 0.060 |
| Vanadium (V), % | 0 to 0.2 | |
| 0 to 0.22 |