EN 1.4107 Stainless Steel vs. ASTM A387 Grade 21 Steel
Both EN 1.4107 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 90% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is EN 1.4107 stainless steel and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 18 to 21 | |
| 21 |
| Fatigue Strength, MPa | 260 to 350 | |
| 160 to 250 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 700 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 400 to 570 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 740 | |
| 480 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1470 |
| Melting Onset (Solidus), °C | 1410 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 27 | |
| 41 |
| Thermal Expansion, µm/m-K | 10 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 4.1 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 1.8 |
| Embodied Energy, MJ/kg | 30 | |
| 23 |
| Embodied Water, L/kg | 100 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 to 840 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 21 to 22 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 7.2 | |
| 11 |
| Thermal Shock Resistance, points | 22 to 25 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.1 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 11.5 to 12.5 | |
| 2.8 to 3.3 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 83.8 to 87.2 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0.5 to 0.8 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0.8 to 1.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.025 |
| Vanadium (V), % | 0 to 0.080 | |
| 0 |