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ASTM B780 Alloy vs. Grade 364 Molybdenum

Both ASTM B780 alloy and grade 364 molybdenum are otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is grade 364 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
310
Elongation at Break, % 1.1 to 9.1
6.2 to 11
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 30
120
Tensile Strength: Ultimate (UTS), MPa 330 to 590
580 to 720

Thermal Properties

Latent Heat of Fusion, J/g 140
370
Specific Heat Capacity, J/kg-K 270
250
Thermal Expansion, µm/m-K 18
7.0

Otherwise Unclassified Properties

Density, g/cm3 10
10

Common Calculations

Stiffness to Weight: Axial, points 4.5
17
Stiffness to Weight: Bending, points 14
22
Strength to Weight: Axial, points 9.1 to 16
16 to 20
Strength to Weight: Bending, points 11 to 15
15 to 17
Thermal Shock Resistance, points 16 to 29
19 to 24

Alloy Composition

Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0.010 to 0.040
Copper (Cu), % 23.5 to 25.7
0
Iron (Fe), % 0 to 0.050
0 to 0.010
Lead (Pb), % 0 to 0.030
0
Molybdenum (Mo), % 0
99.2 to 99.5
Nickel (Ni), % 0.35 to 0.65
0 to 0.0050
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 74 to 76
0
Titanium (Ti), % 0
0.4 to 0.55
Zinc (Zn), % 0 to 0.060
0
Zirconium (Zr), % 0
0.060 to 0.12