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ACI-ASTM CG6MMN Steel vs. AWS BAu-2

ACI-ASTM CG6MMN 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 (14, 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 CG6MMN steel and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 79
36
Tensile Strength: Ultimate (UTS), MPa 670
150

Thermal Properties

Latent Heat of Fusion, J/g 300
92
Melting Completion (Liquidus), °C 1420
890
Melting Onset (Solidus), °C 1380
890
Specific Heat Capacity, J/kg-K 480
180
Thermal Expansion, µm/m-K 17
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 24
2.4
Strength to Weight: Bending, points 22
3.6
Thermal Shock Resistance, points 14
7.1

Alloy Composition

Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 51.9 to 62.1
0
Manganese (Mn), % 4.0 to 6.0
0
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.1 to 0.3
0
Residuals, % 0
0 to 0.15