SAE-AISI H12 Steel vs. SAE-AISI S7 Steel
Both SAE-AISI H12 steel and SAE-AISI S7 steel 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 SAE-AISI H12 steel and the bottom bar is SAE-AISI S7 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 | 75 | |
74 |
Tensile Strength: Ultimate (UTS), MPa | 690 to 1850 | |
670 to 2030 |
Thermal Properties
Latent Heat of Fusion, J/g | 270 | |
260 |
Melting Completion (Liquidus), °C | 1480 | |
1460 |
Melting Onset (Solidus), °C | 1440 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 36 | |
40 |
Thermal Expansion, µm/m-K | 12 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 8.3 | |
7.8 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 9.5 | |
9.0 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 9.0 | |
5.0 |
Density, g/cm3 | 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.9 | |
2.3 |
Embodied Energy, MJ/kg | 41 | |
31 |
Embodied Water, L/kg | 76 | |
65 |
Common Calculations
PREN (Pitting Resistance) | 12 | |
8.4 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 24 to 65 | |
24 to 72 |
Strength to Weight: Bending, points | 22 to 42 | |
22 to 46 |
Thermal Diffusivity, mm2/s | 9.8 | |
11 |
Thermal Shock Resistance, points | 22 to 60 | |
22 to 66 |
Alloy Composition
Carbon (C), % | 0.3 to 0.4 | |
0.45 to 0.55 |
Chromium (Cr), % | 4.8 to 5.5 | |
3.0 to 3.5 |
Copper (Cu), % | 0 to 0.25 | |
0 to 0.25 |
Iron (Fe), % | 87.8 to 91.7 | |
91.6 to 94.9 |
Manganese (Mn), % | 0.2 to 0.5 | |
0.2 to 0.9 |
Molybdenum (Mo), % | 1.3 to 1.8 | |
1.3 to 1.8 |
Nickel (Ni), % | 0 to 0.3 | |
0 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0.8 to 1.2 | |
0.2 to 1.0 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tungsten (W), % | 1.0 to 1.7 | |
0 |
Vanadium (V), % | 0 to 0.5 | |
0 to 0.3 |