SAE-AISI O7 Steel vs. SAE-AISI S4 Steel
Both SAE-AISI O7 steel and SAE-AISI S4 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is SAE-AISI S4 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 | |
72 |
Tensile Strength: Ultimate (UTS), MPa | 680 to 2110 | |
670 to 2140 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
280 |
Melting Completion (Liquidus), °C | 1480 | |
1430 |
Melting Onset (Solidus), °C | 1430 | |
1390 |
Specific Heat Capacity, J/kg-K | 470 | |
480 |
Thermal Conductivity, W/m-K | 41 | |
44 |
Thermal Expansion, µm/m-K | 12 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
7.4 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
8.7 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 6.0 | |
2.2 |
Density, g/cm3 | 7.9 | |
7.7 |
Embodied Carbon, kg CO2/kg material | 2.3 | |
2.0 |
Embodied Energy, MJ/kg | 33 | |
29 |
Embodied Water, L/kg | 52 | |
48 |
Common Calculations
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 24 to 74 | |
24 to 77 |
Strength to Weight: Bending, points | 22 to 46 | |
22 to 48 |
Thermal Diffusivity, mm2/s | 11 | |
12 |
Thermal Shock Resistance, points | 23 to 70 | |
20 to 65 |
Alloy Composition
Carbon (C), % | 1.1 to 1.3 | |
0.5 to 0.65 |
Chromium (Cr), % | 0.35 to 0.85 | |
0.1 to 0.5 |
Copper (Cu), % | 0 to 0.25 | |
0 |
Iron (Fe), % | 92.9 to 97.6 | |
95.2 to 96.9 |
Manganese (Mn), % | 0 to 1.0 | |
0.6 to 1.0 |
Molybdenum (Mo), % | 0 to 0.3 | |
0 |
Nickel (Ni), % | 0 to 0.3 | |
0 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0 to 0.6 | |
1.8 to 2.3 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tungsten (W), % | 1.0 to 2.0 | |
0 |
Vanadium (V), % | 0 to 0.4 | |
0.15 to 0.35 |