AISI 201 Stainless Steel vs. ASTM A369 Grade FP21
Both AISI 201 stainless steel and ASTM A369 grade FP21 are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is AISI 201 stainless steel and the bottom bar is ASTM A369 grade FP21.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 440 | |
| 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 4.6 to 51 | |
| 20 |
| Fatigue Strength, MPa | 280 to 600 | |
| 160 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 74 |
| Shear Strength, MPa | 450 to 840 | |
| 300 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 1450 | |
| 470 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1080 | |
| 240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 880 | |
| 470 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1470 |
| Melting Onset (Solidus), °C | 1370 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 41 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 4.0 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 38 | |
| 23 |
| Embodied Water, L/kg | 140 | |
| 61 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 6.2 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 61 to 340 | |
| 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 230 to 2970 | |
| 150 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 52 | |
| 17 |
| Strength to Weight: Bending, points | 22 to 37 | |
| 17 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 11 |
| Thermal Shock Resistance, points | 14 to 32 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 16 to 18 | |
| 2.7 to 3.4 |
| Iron (Fe), % | 67.5 to 75 | |
| 94.3 to 96.2 |
| Manganese (Mn), % | 5.5 to 7.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.8 to 1.1 |
| Nickel (Ni), % | 3.5 to 5.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.060 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |