EN 1.4421 Stainless Steel vs. EN 1.7221 Steel
Both EN 1.4421 stainless steel and EN 1.7221 steel are iron alloys. They have 80% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is EN 1.4421 stainless steel and the bottom bar is EN 1.7221 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
190 |
Elongation at Break, % | 11 to 17 | |
11 to 17 |
Fatigue Strength, MPa | 380 to 520 | |
290 to 390 |
Impact Strength: V-Notched Charpy, J | 30 to 67 | |
20 to 38 |
Poisson's Ratio | 0.28 | |
0.29 |
Shear Modulus, GPa | 77 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 880 to 1100 | |
650 to 780 |
Tensile Strength: Yield (Proof), MPa | 620 to 950 | |
430 to 630 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
250 |
Maximum Temperature: Mechanical, °C | 870 | |
420 |
Melting Completion (Liquidus), °C | 1440 | |
1460 |
Melting Onset (Solidus), °C | 1400 | |
1420 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 16 | |
44 |
Thermal Expansion, µm/m-K | 10 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
7.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
8.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 12 | |
2.4 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.6 | |
1.5 |
Embodied Energy, MJ/kg | 36 | |
20 |
Embodied Water, L/kg | 130 | |
51 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 140 | |
83 to 98 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 960 to 2270 | |
490 to 1050 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
24 |
Strength to Weight: Axial, points | 31 to 39 | |
23 to 27 |
Strength to Weight: Bending, points | 26 to 30 | |
21 to 24 |
Thermal Diffusivity, mm2/s | 4.4 | |
12 |
Thermal Shock Resistance, points | 31 to 39 | |
19 to 23 |
Alloy Composition
Carbon (C), % | 0 to 0.060 | |
0.22 to 0.29 |
Chromium (Cr), % | 15.5 to 17.5 | |
0.8 to 1.2 |
Iron (Fe), % | 74.4 to 80.5 | |
96.8 to 98.3 |
Manganese (Mn), % | 0 to 1.0 | |
0.5 to 0.8 |
Molybdenum (Mo), % | 0 to 0.7 | |
0.15 to 0.3 |
Nickel (Ni), % | 4.0 to 5.5 | |
0 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.8 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.020 | |
0 to 0.030 |