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R30008 Cobalt vs. K93603 Alloy

R30008 cobalt belongs to the cobalt alloys classification, while K93603 alloy belongs to the iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30008 cobalt and the bottom bar is K93603 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 83
72
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
490 to 810

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1330
1380
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 95
25
Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 8.1
4.8
Embodied Energy, MJ/kg 110
66
Embodied Water, L/kg 400
120

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 31 to 56
17 to 27
Strength to Weight: Bending, points 25 to 37
17 to 24
Thermal Shock Resistance, points 25 to 44
15 to 25

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0 to 0.050
Chromium (Cr), % 18.5 to 21.5
0 to 0.25
Cobalt (Co), % 39 to 42
0 to 0.5
Iron (Fe), % 7.6 to 20
61.8 to 64
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 1.0 to 2.0
0 to 0.6
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
36
Phosphorus (P), % 0 to 0.015
0 to 0.015
Silicon (Si), % 0 to 1.2
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0 to 0.1
Zirconium (Zr), % 0
0 to 0.1

Comparable Variants