EN 1.1221 Steel vs. EN 1.7216 Steel
Both EN 1.1221 steel and EN 1.7216 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is EN 1.7216 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 250 | |
| 200 to 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 10 to 21 | |
| 12 to 23 |
| Fatigue Strength, MPa | 240 to 340 | |
| 290 to 440 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 450 to 520 | |
| 410 to 560 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 870 | |
| 650 to 930 |
| Tensile Strength: Yield (Proof), MPa | 390 to 550 | |
| 400 to 690 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 420 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 48 | |
| 46 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 2.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 20 |
| Embodied Water, L/kg | 47 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 67 to 130 | |
| 110 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 410 to 800 | |
| 430 to 1280 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 31 | |
| 23 to 33 |
| Strength to Weight: Bending, points | 23 to 26 | |
| 21 to 27 |
| Thermal Diffusivity, mm2/s | 13 | |
| 12 |
| Thermal Shock Resistance, points | 23 to 28 | |
| 19 to 27 |
Alloy Composition
| Carbon (C), % | 0.57 to 0.65 | |
| 0.27 to 0.34 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 97.1 to 98.8 | |
| 97.2 to 98.4 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0.35 to 0.6 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0.15 to 0.3 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.035 |