ASTM A369 Grade FP21 vs. SAE-AISI 1065 Steel
Both ASTM A369 grade FP21 and SAE-AISI 1065 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is ASTM A369 grade FP21 and the bottom bar is SAE-AISI 1065 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 | |
| 210 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 11 to 14 |
| Fatigue Strength, MPa | 160 | |
| 270 to 340 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 72 |
| Shear Strength, MPa | 300 | |
| 430 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 470 | |
| 710 to 780 |
| Tensile Strength: Yield (Proof), MPa | 240 | |
| 430 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 400 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 41 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.4 |
| Embodied Energy, MJ/kg | 23 | |
| 19 |
| Embodied Water, L/kg | 61 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 80 | |
| 74 to 90 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 | |
| 490 to 820 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 | |
| 25 to 28 |
| Strength to Weight: Bending, points | 17 | |
| 23 to 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 14 |
| Thermal Shock Resistance, points | 14 | |
| 25 to 27 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0.6 to 0.7 |
| Chromium (Cr), % | 2.7 to 3.4 | |
| 0 |
| Iron (Fe), % | 94.3 to 96.2 | |
| 98.3 to 98.8 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 0.8 to 1.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.050 |