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ACI-ASTM CB7Cu-2 Steel vs. SAE-AISI A2 Steel

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI A2 steel are iron alloys. They have 82% 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 ACI-ASTM CB7Cu-2 steel and the bottom bar is SAE-AISI A2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
74
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
710 to 2040

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
38
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
5.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 38
38
Embodied Water, L/kg 130
73

Common Calculations

PREN (Pitting Resistance) 15
8.9
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
25 to 73
Strength to Weight: Bending, points 28 to 35
23 to 46
Thermal Diffusivity, mm2/s 4.6
10
Thermal Shock Resistance, points 32 to 45
25 to 71

Alloy Composition

Carbon (C), % 0 to 0.070
1.0 to 1.1
Chromium (Cr), % 14 to 15.5
4.8 to 5.5
Copper (Cu), % 2.5 to 3.2
0 to 0.25
Iron (Fe), % 73.6 to 79
89.4 to 93.3
Manganese (Mn), % 0 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 4.5 to 5.5
0 to 0.3
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.15 to 0.5