ASTM A369 Grade FPA vs. ASTM A372 Grade F Steel
Both ASTM A369 grade FPA and ASTM A372 grade F steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is ASTM A369 grade FPA and the bottom bar is ASTM A372 grade F steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 110 | |
200 to 280 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 27 | |
20 to 22 |
Fatigue Strength, MPa | 180 | |
310 to 380 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Shear Strength, MPa | 240 | |
410 to 570 |
Tensile Strength: Ultimate (UTS), MPa | 380 | |
650 to 910 |
Tensile Strength: Yield (Proof), MPa | 240 | |
430 to 550 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 400 | |
420 |
Melting Completion (Liquidus), °C | 1460 | |
1460 |
Melting Onset (Solidus), °C | 1420 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 52 | |
44 |
Thermal Expansion, µm/m-K | 12 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
7.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
8.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 1.8 | |
2.4 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.4 | |
1.5 |
Embodied Energy, MJ/kg | 18 | |
20 |
Embodied Water, L/kg | 46 | |
51 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 89 | |
130 to 160 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 | |
500 to 810 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 13 | |
23 to 32 |
Strength to Weight: Bending, points | 15 | |
21 to 27 |
Thermal Diffusivity, mm2/s | 14 | |
12 |
Thermal Shock Resistance, points | 12 | |
19 to 27 |
Alloy Composition
Carbon (C), % | 0 to 0.25 | |
0.3 to 0.4 |
Chromium (Cr), % | 0 | |
0.8 to 1.2 |
Iron (Fe), % | 98.3 to 99.63 | |
96.8 to 97.9 |
Manganese (Mn), % | 0.27 to 0.93 | |
0.7 to 1.0 |
Molybdenum (Mo), % | 0 | |
0.15 to 0.25 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.015 |
Silicon (Si), % | 0.1 to 0.5 | |
0.15 to 0.35 |
Sulfur (S), % | 0 to 0.035 | |
0 to 0.010 |