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ASTM B522 Class II vs. R30035 Cobalt

ASTM B522 class II belongs to the otherwise unclassified metals classification, while R30035 cobalt belongs to the cobalt alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM B522 class II and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 96
220 to 230
Elongation at Break, % 1.1 to 28
9.0 to 46
Poisson's Ratio 0.41
0.29
Shear Modulus, GPa 34
84 to 89
Tensile Strength: Ultimate (UTS), MPa 280 to 490
900 to 1900
Tensile Strength: Yield (Proof), MPa 120 to 210
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 77
320
Melting Completion (Liquidus), °C 1030
1440
Melting Onset (Solidus), °C 1030
1320
Specific Heat Capacity, J/kg-K 160
440
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 5.7
1.8

Otherwise Unclassified Properties

Density, g/cm3 17
8.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 63
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 75 to 230
210 to 5920
Stiffness to Weight: Axial, points 3.1
14 to 15
Stiffness to Weight: Bending, points 8.9
23 to 24
Strength to Weight: Axial, points 4.4 to 7.8
29 to 61
Strength to Weight: Bending, points 5.5 to 8.0
24 to 39
Thermal Shock Resistance, points 13 to 24
23 to 46

Alloy Composition


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Boron (B), % 0
0 to 0.015
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Gold (Au), % 68.5 to 69.5
0
Iron (Fe), % 0
0 to 1.0
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0
0 to 0.015
Platinum (Pt), % 5.5 to 6.5
0
Silicon (Si), % 0
0 to 0.15
Silver (Ag), % 24.5 to 25.5
0
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Residuals, % 0 to 0.26
0

Comparable Variants