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AWS BAu-2 vs. EN 1.7729 Steel

AWS BAu-2 belongs to the otherwise unclassified metals classification, while EN 1.7729 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (20, 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 BAu-2 and the bottom bar is EN 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 36
73
Tensile Strength: Ultimate (UTS), MPa 150
910

Thermal Properties

Latent Heat of Fusion, J/g 92
250
Melting Completion (Liquidus), °C 890
1470
Melting Onset (Solidus), °C 890
1430
Specific Heat Capacity, J/kg-K 180
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Density, g/cm3 17
7.8

Common Calculations

Stiffness to Weight: Axial, points 3.3
13
Stiffness to Weight: Bending, points 9.1
24
Strength to Weight: Axial, points 2.4
32
Strength to Weight: Bending, points 3.6
27
Thermal Shock Resistance, points 7.1
27

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0
0.17 to 0.23
Chromium (Cr), % 0
0.9 to 1.2
Copper (Cu), % 19.4 to 20.5
0 to 0.2
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
94.8 to 97
Manganese (Mn), % 0
0.35 to 0.75
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Vanadium (V), % 0
0.6 to 0.8
Residuals, % 0 to 0.15
0