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R31233 Cobalt vs. ASTM B817 Type II

R31233 cobalt belongs to the cobalt alloys classification, while ASTM B817 type II belongs to the titanium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is ASTM B817 type II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Elongation at Break, % 17
3.0 to 13
Fatigue Strength, MPa 220
390 to 530
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 85
40
Tensile Strength: Ultimate (UTS), MPa 1020
900 to 960
Tensile Strength: Yield (Proof), MPa 420
780 to 900

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1350
1580
Melting Onset (Solidus), °C 1330
1530
Specific Heat Capacity, J/kg-K 440
550
Thermal Expansion, µm/m-K 13
9.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
4.6
Embodied Carbon, kg CO2/kg material 8.4
40
Embodied Energy, MJ/kg 110
650
Embodied Water, L/kg 480
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
26 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 410
2890 to 3890
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
34
Strength to Weight: Axial, points 33
55 to 58
Strength to Weight: Bending, points 26
45 to 47
Thermal Shock Resistance, points 25
62 to 66

Alloy Composition

Aluminum (Al), % 0
5.0 to 6.0
Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 23.5 to 27.5
0
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 1.0 to 5.0
0.35 to 1.0
Manganese (Mn), % 0.1 to 1.5
0
Molybdenum (Mo), % 4.0 to 6.0
0
Nickel (Ni), % 7.0 to 11
0
Nitrogen (N), % 0.030 to 0.12
0 to 0.040
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.050 to 1.0
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
82.1 to 87.8
Tungsten (W), % 1.0 to 3.0
0
Vanadium (V), % 0
5.0 to 6.0
Residuals, % 0
0 to 0.4