SAE-AISI O7 Steel vs. SAE-AISI P4 Steel
Both SAE-AISI O7 steel and SAE-AISI P4 steel are iron alloys. They have a very high 95% of their average alloy composition in common.
For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is SAE-AISI P4 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
74 |
Tensile Strength: Ultimate (UTS), MPa | 680 to 2110 | |
390 to 1980 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
260 |
Melting Completion (Liquidus), °C | 1480 | |
1460 |
Melting Onset (Solidus), °C | 1430 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 41 | |
41 |
Thermal Expansion, µm/m-K | 12 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
8.1 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
9.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 6.0 | |
4.4 |
Density, g/cm3 | 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.3 | |
1.8 |
Embodied Energy, MJ/kg | 33 | |
23 |
Embodied Water, L/kg | 52 | |
68 |
Common Calculations
PREN (Pitting Resistance) | 3.6 | |
7.0 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 24 to 74 | |
14 to 70 |
Strength to Weight: Bending, points | 22 to 46 | |
15 to 45 |
Thermal Diffusivity, mm2/s | 11 | |
11 |
Thermal Shock Resistance, points | 23 to 70 | |
13 to 64 |
Alloy Composition
Carbon (C), % | 1.1 to 1.3 | |
0 to 0.12 |
Chromium (Cr), % | 0.35 to 0.85 | |
4.0 to 5.3 |
Copper (Cu), % | 0 to 0.25 | |
0 to 0.25 |
Iron (Fe), % | 92.9 to 97.6 | |
92.3 to 95.3 |
Manganese (Mn), % | 0 to 1.0 | |
0.2 to 0.6 |
Molybdenum (Mo), % | 0 to 0.3 | |
0.4 to 1.0 |
Nickel (Ni), % | 0 to 0.3 | |
0 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0 to 0.6 | |
0.1 to 0.4 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tungsten (W), % | 1.0 to 2.0 | |
0 |
Vanadium (V), % | 0 to 0.4 | |
0 |