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SAE-AISI M6 Steel vs. ASTM B477 Au-Ni-Ag

SAE-AISI M6 steel belongs to the iron alloys classification, while ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (12, 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 M6 steel and the bottom bar is ASTM B477 Au-Ni-Ag.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
95
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 77
34
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
310 to 550

Thermal Properties

Latent Heat of Fusion, J/g 260
80
Melting Completion (Liquidus), °C 1560
1010
Melting Onset (Solidus), °C 1510
930
Specific Heat Capacity, J/kg-K 440
160
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Density, g/cm3 8.4
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.1
Stiffness to Weight: Bending, points 23
8.9
Strength to Weight: Axial, points 28 to 73
5.0 to 9.0
Strength to Weight: Bending, points 24 to 45
6.0 to 8.8
Thermal Shock Resistance, points 26 to 68
16 to 28

Alloy Composition

Carbon (C), % 0.75 to 0.85
0
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 11 to 13
0
Gold (Au), % 0
74.2 to 75.8
Iron (Fe), % 68.8 to 74.6
0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0
2.6 to 3.4
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0
Silver (Ag), % 0
21.4 to 22.6
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0
Residuals, % 0
0 to 0.3