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AISI 304L Stainless Steel vs. AWS BAu-4

AISI 304L stainless steel belongs to the iron alloys classification, while AWS BAu-4 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (21, 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 AISI 304L stainless steel and the bottom bar is AWS BAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.28
0.4
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 540 to 1160
200

Thermal Properties

Latent Heat of Fusion, J/g 290
100
Melting Completion (Liquidus), °C 1450
950
Melting Onset (Solidus), °C 1400
950
Specific Heat Capacity, J/kg-K 480
190
Thermal Expansion, µm/m-K 17
14

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Stiffness to Weight: Axial, points 14
3.6
Stiffness to Weight: Bending, points 25
9.3
Strength to Weight: Axial, points 19 to 41
3.2
Strength to Weight: Bending, points 19 to 31
4.4
Thermal Shock Resistance, points 12 to 25
9.2

Alloy Composition


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Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 18 to 20
0
Gold (Au), % 0
81.5 to 82.5
Iron (Fe), % 65 to 74
0
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 8.0 to 12
17.4 to 18.5
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.15