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SAE-AISI A7 Steel vs. AWS BVAu-8

SAE-AISI A7 steel belongs to the iron alloys classification, while AWS BVAu-8 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (8, 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 SAE-AISI A7 steel and the bottom bar is AWS BVAu-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Poisson's Ratio 0.29
0.42
Shear Modulus, GPa 72
36
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
140

Thermal Properties

Latent Heat of Fusion, J/g 260
71
Melting Completion (Liquidus), °C 1470
1240
Melting Onset (Solidus), °C 1430
1200
Specific Heat Capacity, J/kg-K 470
140
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 7.7
19

Common Calculations

Stiffness to Weight: Axial, points 13
3.0
Stiffness to Weight: Bending, points 25
8.3
Strength to Weight: Axial, points 29 to 77
2.1
Strength to Weight: Bending, points 25 to 48
3.2
Thermal Shock Resistance, points 27 to 72
7.1

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 2.0 to 2.9
0 to 0.0050
Chromium (Cr), % 5.0 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Gold (Au), % 0
91 to 93
Iron (Fe), % 81.4 to 87.7
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 0 to 0.8
0
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
0
Palladium (Pd), % 0
7.0 to 9.0
Phosphorus (P), % 0 to 0.030
0 to 0.0020
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0
Zinc (Zn), % 0
0 to 0.0010