ASTM A369 Grade FP21 vs. AISI 410 Stainless Steel
Both ASTM A369 grade FP21 and AISI 410 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 32 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 ASTM A369 grade FP21 and the bottom bar is AISI 410 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 | |
| 190 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 16 to 22 |
| Fatigue Strength, MPa | 160 | |
| 190 to 350 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 74 | |
| 76 |
| Shear Strength, MPa | 300 | |
| 330 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 470 | |
| 520 to 770 |
| Tensile Strength: Yield (Proof), MPa | 240 | |
| 290 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 710 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1530 |
| Melting Onset (Solidus), °C | 1430 | |
| 1480 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 41 | |
| 30 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 7.0 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.9 |
| Embodied Energy, MJ/kg | 23 | |
| 27 |
| Embodied Water, L/kg | 61 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 6.2 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 80 | |
| 97 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 | |
| 210 to 860 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 17 | |
| 19 to 28 |
| Strength to Weight: Bending, points | 17 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 8.1 |
| Thermal Shock Resistance, points | 14 | |
| 18 to 26 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 2.7 to 3.4 | |
| 11.5 to 13.5 |
| Iron (Fe), % | 94.3 to 96.2 | |
| 83.5 to 88.4 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.8 to 1.1 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.75 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |