MakeItFrom.com
Menu (ESC)

ASTM B780 Alloy vs. R30012 Cobalt

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
220
Elongation at Break, % 1.1 to 9.1
1.0
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 30
86
Tensile Strength: Ultimate (UTS), MPa 330 to 590
830

Thermal Properties

Latent Heat of Fusion, J/g 140
320
Specific Heat Capacity, J/kg-K 270
440
Thermal Expansion, µm/m-K 18
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 70 to 76
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 62 to 68
1.8

Otherwise Unclassified Properties

Density, g/cm3 10
8.8

Common Calculations

Stiffness to Weight: Axial, points 4.5
14
Stiffness to Weight: Bending, points 14
23
Strength to Weight: Axial, points 9.1 to 16
26
Strength to Weight: Bending, points 11 to 15
22
Thermal Shock Resistance, points 16 to 29
23

Alloy Composition

Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 23.5 to 25.7
0
Iron (Fe), % 0 to 0.050
0 to 3.0
Lead (Pb), % 0 to 0.030
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0.35 to 0.65
0 to 3.0
Silicon (Si), % 0
0 to 2.0
Silver (Ag), % 74 to 76
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.060
0