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ACI-ASTM CB7Cu-2 Steel vs. AWS BAu-2

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while AWS BAu-2 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ACI-ASTM CB7Cu-2 steel and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 75
36
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
150

Thermal Properties

Latent Heat of Fusion, J/g 280
92
Melting Completion (Liquidus), °C 1430
890
Melting Onset (Solidus), °C 1380
890
Specific Heat Capacity, J/kg-K 480
180
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 25
9.1
Strength to Weight: Axial, points 34 to 48
2.4
Strength to Weight: Bending, points 28 to 35
3.6
Thermal Shock Resistance, points 32 to 45
7.1

Alloy Composition

Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 3.2
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 73.6 to 79
0
Manganese (Mn), % 0 to 0.7
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
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.15