ACI-ASTM CB7Cu-1 Steel vs. SAE-AISI 8645 Steel
Both ACI-ASTM CB7Cu-1 steel and SAE-AISI 8645 steel are iron alloys. They have 77% of their average alloy composition in common. There are 29 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 ACI-ASTM CB7Cu-1 steel and the bottom bar is SAE-AISI 8645 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 300 to 420 | |
180 to 200 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 5.7 to 11 | |
12 to 23 |
Fatigue Strength, MPa | 420 to 590 | |
280 to 350 |
Poisson's Ratio | 0.28 | |
0.29 |
Shear Modulus, GPa | 76 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 960 to 1350 | |
600 to 670 |
Tensile Strength: Yield (Proof), MPa | 760 to 1180 | |
390 to 560 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
250 |
Melting Completion (Liquidus), °C | 1430 | |
1460 |
Melting Onset (Solidus), °C | 1500 | |
1420 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 17 | |
39 |
Thermal Expansion, µm/m-K | 11 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
7.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
8.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 13 | |
2.6 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.6 | |
1.5 |
Embodied Energy, MJ/kg | 38 | |
20 |
Embodied Water, L/kg | 130 | |
50 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
77 to 120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1500 to 3590 | |
420 to 840 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
24 |
Strength to Weight: Axial, points | 34 to 48 | |
21 to 24 |
Strength to Weight: Bending, points | 28 to 35 | |
20 to 22 |
Thermal Diffusivity, mm2/s | 4.6 | |
10 |
Thermal Shock Resistance, points | 32 to 45 | |
18 to 20 |
Alloy Composition
Carbon (C), % | 0 to 0.070 | |
0.43 to 0.48 |
Chromium (Cr), % | 15.5 to 17.7 | |
0.4 to 0.6 |
Copper (Cu), % | 2.5 to 3.2 | |
0 |
Iron (Fe), % | 72.3 to 78.4 | |
96.5 to 97.7 |
Manganese (Mn), % | 0 to 0.7 | |
0.75 to 1.0 |
Molybdenum (Mo), % | 0 | |
0.15 to 0.25 |
Nickel (Ni), % | 3.6 to 4.6 | |
0.4 to 0.7 |
Niobium (Nb), % | 0 to 0.35 | |
0 |
Nitrogen (N), % | 0 to 0.050 | |
0 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.035 |
Silicon (Si), % | 0 to 1.0 | |
0.15 to 0.35 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.040 |