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AWS BVAu-7 vs. SAE-AISI 8740 Steel

AWS BVAu-7 belongs to the otherwise unclassified metals classification, while SAE-AISI 8740 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is AWS BVAu-7 and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
190
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 45
73
Tensile Strength: Ultimate (UTS), MPa 200
580 to 670

Thermal Properties

Latent Heat of Fusion, J/g 140
250
Melting Completion (Liquidus), °C 1120
1460
Melting Onset (Solidus), °C 1100
1420
Specific Heat Capacity, J/kg-K 240
470
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Density, g/cm3 15
7.8

Common Calculations

Stiffness to Weight: Axial, points 4.7
13
Stiffness to Weight: Bending, points 11
24
Strength to Weight: Axial, points 3.7
20 to 24
Strength to Weight: Bending, points 5.1
20 to 22
Thermal Shock Resistance, points 8.9
17 to 20

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0.38 to 0.43
Chromium (Cr), % 0
0.4 to 0.6
Cobalt (Co), % 0 to 0.060
0
Gold (Au), % 49.5 to 50.5
0
Iron (Fe), % 0
96.5 to 97.7
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
0.75 to 1.0
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 24.5 to 25.5
0.4 to 0.7
Palladium (Pd), % 23.9 to 26
0
Phosphorus (P), % 0 to 0.0020
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.0010
0