EN 1.4421 Stainless Steel vs. ASTM A227 Spring Steel
Both EN 1.4421 stainless steel and ASTM A227 spring steel are iron alloys. They have 78% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 ASTM A227 spring steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 12 |
| Fatigue Strength, MPa | 380 to 520 | |
| 900 to 1160 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 880 to 1100 | |
| 1720 to 2220 |
| Tensile Strength: Yield (Proof), MPa | 620 to 950 | |
| 1430 to 1850 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 400 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1450 |
| Melting Onset (Solidus), °C | 1400 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 52 |
| Thermal Expansion, µm/m-K | 10 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 1.4 |
| Embodied Energy, MJ/kg | 36 | |
| 19 |
| Embodied Water, L/kg | 130 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 140 | |
| 200 to 260 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 39 | |
| 61 to 79 |
| Strength to Weight: Bending, points | 26 to 30 | |
| 41 to 48 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 14 |
| Thermal Shock Resistance, points | 31 to 39 | |
| 55 to 71 |
Alloy Composition
| Carbon (C), % | 0 to 0.060 | |
| 0.45 to 0.85 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 0 |
| Iron (Fe), % | 74.4 to 80.5 | |
| 97.4 to 99.1 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.3 to 1.3 |
| Molybdenum (Mo), % | 0 to 0.7 | |
| 0 |
| Nickel (Ni), % | 4.0 to 5.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.8 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.050 |