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SAE-AISI A8 Steel vs. ACI-ASTM CB7Cu-2 Steel

Both SAE-AISI A8 steel and ACI-ASTM CB7Cu-2 steel are iron alloys. They have 83% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is ACI-ASTM CB7Cu-2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
960 to 1350

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37
17
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
13
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.6
Embodied Energy, MJ/kg 31
38
Embodied Water, L/kg 73
130

Common Calculations

PREN (Pitting Resistance) 12
15
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 68
34 to 48
Strength to Weight: Bending, points 22 to 44
28 to 35
Thermal Diffusivity, mm2/s 9.9
4.6
Thermal Shock Resistance, points 22 to 62
32 to 45

Alloy Composition

Carbon (C), % 0.5 to 0.6
0 to 0.070
Chromium (Cr), % 4.8 to 5.5
14 to 15.5
Copper (Cu), % 0 to 0.25
2.5 to 3.2
Iron (Fe), % 88.5 to 91.9
73.6 to 79
Manganese (Mn), % 0 to 0.5
0 to 0.7
Molybdenum (Mo), % 1.2 to 1.7
0
Nickel (Ni), % 0 to 0.3
4.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.75 to 1.1
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 1.5
0