ASTM A372 Grade M Steel vs. ASTM A369 Grade FP5
Both ASTM A372 grade M steel and ASTM A369 grade FP5 are iron alloys. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is ASTM A372 grade M steel and the bottom bar is ASTM A369 grade FP5.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 240 to 280 | |
140 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 18 to 21 | |
20 |
Fatigue Strength, MPa | 450 to 520 | |
160 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
74 |
Shear Strength, MPa | 510 to 570 | |
300 |
Tensile Strength: Ultimate (UTS), MPa | 810 to 910 | |
470 |
Tensile Strength: Yield (Proof), MPa | 660 to 770 | |
240 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
260 |
Maximum Temperature: Mechanical, °C | 450 | |
510 |
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 | 46 | |
40 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 8.0 | |
8.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
9.2 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 5.0 | |
4.3 |
Density, g/cm3 | 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.0 | |
1.7 |
Embodied Energy, MJ/kg | 27 | |
23 |
Embodied Water, L/kg | 61 | |
69 |
Common Calculations
PREN (Pitting Resistance) | 3.4 | |
6.8 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 | |
80 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1140 to 1580 | |
140 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 29 to 32 | |
17 |
Strength to Weight: Bending, points | 24 to 27 | |
17 |
Thermal Diffusivity, mm2/s | 12 | |
11 |
Thermal Shock Resistance, points | 24 to 27 | |
13 |
Alloy Composition
Carbon (C), % | 0 to 0.23 | |
0 to 0.15 |
Chromium (Cr), % | 1.5 to 2.0 | |
4.0 to 6.0 |
Iron (Fe), % | 92.5 to 95.1 | |
92.1 to 95.3 |
Manganese (Mn), % | 0.2 to 0.4 | |
0.3 to 0.6 |
Molybdenum (Mo), % | 0.4 to 0.6 | |
0.45 to 0.65 |
Nickel (Ni), % | 2.8 to 3.9 | |
0 |
Phosphorus (P), % | 0 to 0.015 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.3 | |
0 to 0.5 |
Sulfur (S), % | 0 to 0.010 | |
0 to 0.025 |
Vanadium (V), % | 0 to 0.080 | |
0 |