SAE-AISI 8640 Steel vs. ACI-ASTM CA15M Steel
Both SAE-AISI 8640 steel and ACI-ASTM CA15M steel are iron alloys. They have 87% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8640 steel and the bottom bar is ACI-ASTM CA15M steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 170 | |
210 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
200 |
Elongation at Break, % | 23 | |
20 |
Fatigue Strength, MPa | 270 | |
330 |
Poisson's Ratio | 0.29 | |
0.28 |
Shear Modulus, GPa | 73 | |
76 |
Tensile Strength: Ultimate (UTS), MPa | 570 | |
690 |
Tensile Strength: Yield (Proof), MPa | 380 | |
510 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
270 |
Maximum Temperature: Mechanical, °C | 410 | |
760 |
Melting Completion (Liquidus), °C | 1460 | |
1450 |
Melting Onset (Solidus), °C | 1420 | |
1410 |
Specific Heat Capacity, J/kg-K | 470 | |
480 |
Thermal Conductivity, W/m-K | 39 | |
27 |
Thermal Expansion, µm/m-K | 13 | |
10 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
3.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
3.5 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.6 | |
7.5 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
2.1 |
Embodied Energy, MJ/kg | 20 | |
29 |
Embodied Water, L/kg | 50 | |
100 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
130 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 | |
670 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 20 | |
25 |
Strength to Weight: Bending, points | 20 | |
22 |
Thermal Diffusivity, mm2/s | 10 | |
7.2 |
Thermal Shock Resistance, points | 17 | |
25 |
Alloy Composition
Carbon (C), % | 0.38 to 0.43 | |
0 to 0.15 |
Chromium (Cr), % | 0.4 to 0.6 | |
11.5 to 14 |
Iron (Fe), % | 96.6 to 97.8 | |
82.1 to 88.4 |
Manganese (Mn), % | 0.75 to 1.0 | |
0 to 1.0 |
Molybdenum (Mo), % | 0.15 to 0.25 | |
0.15 to 1.0 |
Nickel (Ni), % | 0.4 to 0.7 | |
0 to 1.0 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.040 |
Silicon (Si), % | 0.15 to 0.35 | |
0 to 0.65 |
Sulfur (S), % | 0 to 0.040 | |
0 to 0.040 |