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Annealed ASTM B541 vs. Annealed SAE-AISI M50

Annealed ASTM B541 belongs to the otherwise unclassified metals classification, while annealed SAE-AISI M50 belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (15, 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 annealed ASTM B541 and the bottom bar is annealed SAE-AISI M50.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 38
75
Tensile Strength: Ultimate (UTS), MPa 670
720

Thermal Properties

Latent Heat of Fusion, J/g 90
260
Melting Completion (Liquidus), °C 1110
1480
Melting Onset (Solidus), °C 930
1440
Specific Heat Capacity, J/kg-K 170
470
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
10

Otherwise Unclassified Properties

Density, g/cm3 17
7.9

Common Calculations

Stiffness to Weight: Axial, points 3.4
14
Stiffness to Weight: Bending, points 9.0
25
Strength to Weight: Axial, points 11
26
Strength to Weight: Bending, points 9.8
23
Thermal Shock Resistance, points 36
21

Alloy Composition

Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 13.5 to 15.5
0 to 0.25
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
87 to 90.4
Manganese (Mn), % 0
0.15 to 0.45
Molybdenum (Mo), % 0
3.9 to 4.8
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Platinum (Pt), % 8.0 to 9.0
0
Silicon (Si), % 0
0.2 to 0.6
Silver (Ag), % 4.0 to 5.0
0
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.8 to 1.3
Zinc (Zn), % 0.7 to 1.3
0
Residuals, % 0 to 0.4
0