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AWS BVAu-2 vs. ACI-ASTM CK3MCuN Steel

AWS BVAu-2 belongs to the otherwise unclassified metals classification, while ACI-ASTM CK3MCuN steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (18, 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 AWS BVAu-2 and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Poisson's Ratio 0.4
0.28
Shear Modulus, GPa 36
80
Tensile Strength: Ultimate (UTS), MPa 150
620

Thermal Properties

Latent Heat of Fusion, J/g 92
300
Melting Completion (Liquidus), °C 890
1460
Melting Onset (Solidus), °C 890
1350
Specific Heat Capacity, J/kg-K 180
460
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Density, g/cm3 17
8.0

Common Calculations

Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 9.1
24
Strength to Weight: Axial, points 2.4
21
Strength to Weight: Bending, points 3.6
20
Thermal Shock Resistance, points 7.1
14

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0 to 0.025
Chromium (Cr), % 0
19.5 to 20.5
Copper (Cu), % 19.5 to 20.5
0.5 to 1.0
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
49.5 to 56.3
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.0020
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0 to 0.0010
0