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ACI-ASTM CB7Cu-2 Steel vs. SAE-AISI 1140 Steel

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI 1140 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-2 steel and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 11
14 to 18
Fatigue Strength, MPa 420 to 590
230 to 370
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
600 to 700
Tensile Strength: Yield (Proof), MPa 760 to 1180
340 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
51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.4
Embodied Energy, MJ/kg 38
18
Embodied Water, L/kg 130
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
310 to 870
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 34 to 48
21 to 25
Strength to Weight: Bending, points 28 to 35
20 to 22
Thermal Diffusivity, mm2/s 4.6
14
Thermal Shock Resistance, points 32 to 45
18 to 21

Alloy Composition

Carbon (C), % 0 to 0.070
0.37 to 0.44
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 73.6 to 79
98.4 to 98.9
Manganese (Mn), % 0 to 0.7
0.7 to 1.0
Nickel (Ni), % 4.5 to 5.5
0
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0.080 to 0.13