EN 1.7366 +A Steel vs. EN 1.7362 +I Steel
Both EN 1.7366 +A steel and EN 1.7362 +I steel are iron alloys. Both are furnished in the annealed condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.7366 +A steel and the bottom bar is EN 1.7362 +I steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 | |
| 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 22 |
| Fatigue Strength, MPa | 160 | |
| 140 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 38 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 74 |
| Shear Strength, MPa | 290 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 460 | |
| 510 |
| Tensile Strength: Yield (Proof), MPa | 230 | |
| 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 510 | |
| 510 |
| 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 | 40 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.1 | |
| 8.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.3 | |
| 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.3 | |
| 4.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 1.8 |
| Embodied Energy, MJ/kg | 23 | |
| 23 |
| Embodied Water, L/kg | 69 | |
| 69 |
Common Calculations
| PREN (Pitting Resistance) | 6.8 | |
| 6.9 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 74 | |
| 90 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 | |
| 100 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 16 | |
| 18 |
| Strength to Weight: Bending, points | 17 | |
| 18 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 13 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0 to 0.18 | |
| 0.1 to 0.15 |
| Chromium (Cr), % | 4.0 to 6.0 | |
| 4.0 to 6.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 91.9 to 95.3 | |
| 91.5 to 95.2 |
| Manganese (Mn), % | 0.3 to 0.8 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.45 to 0.65 | |
| 0.45 to 0.65 |
| Nickel (Ni), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.0050 |