EN 1.4021 Stainless Steel vs. K1A Magnesium
EN 1.4021 stainless steel belongs to the iron alloys classification, while K1A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is K1A magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 43 |
| Elongation at Break, % | 11 to 17 | |
| 13 |
| Fatigue Strength, MPa | 240 to 380 | |
| 39 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 17 |
| Shear Strength, MPa | 390 to 530 | |
| 55 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 880 | |
| 180 |
| Tensile Strength: Yield (Proof), MPa | 390 to 670 | |
| 51 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 350 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 120 |
| Melting Completion (Liquidus), °C | 1440 | |
| 650 |
| Melting Onset (Solidus), °C | 1400 | |
| 650 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 1000 |
| Thermal Conductivity, W/m-K | 30 | |
| 120 |
| Thermal Expansion, µm/m-K | 11 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 170 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 13 |
| Density, g/cm3 | 7.7 | |
| 1.6 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 24 |
| Embodied Energy, MJ/kg | 27 | |
| 170 |
| Embodied Water, L/kg | 100 | |
| 970 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 110 | |
| 17 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 to 1160 | |
| 30 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 73 |
| Strength to Weight: Axial, points | 23 to 31 | |
| 31 |
| Strength to Weight: Bending, points | 21 to 26 | |
| 43 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 75 |
| Thermal Shock Resistance, points | 22 to 31 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0.16 to 0.25 | |
| 0 |
| Chromium (Cr), % | 12 to 14 | |
| 0 |
| Iron (Fe), % | 83.2 to 87.8 | |
| 0 |
| Magnesium (Mg), % | 0 | |
| 98.7 to 99.6 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0.4 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |