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ACI-ASTM CB7Cu-2 Steel vs. SAE-AISI 8620 Steel

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI 8620 steel are iron alloys. They have 78% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CB7Cu-2 steel and the bottom bar is SAE-AISI 8620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 11
13 to 31
Fatigue Strength, MPa 420 to 590
270 to 360
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
520 to 690
Tensile Strength: Yield (Proof), MPa 760 to 1180
360 to 570

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
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 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

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
86 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
340 to 880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 34 to 48
18 to 24
Strength to Weight: Bending, points 28 to 35
18 to 22
Thermal Diffusivity, mm2/s 4.6
10
Thermal Shock Resistance, points 32 to 45
15 to 20

Alloy Composition

Carbon (C), % 0 to 0.070
0.18 to 0.23
Chromium (Cr), % 14 to 15.5
0.4 to 0.6
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 73.6 to 79
96.9 to 98
Manganese (Mn), % 0 to 0.7
0.7 to 0.9
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 4.5 to 5.5
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