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