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ASTM B817 Type II vs. R30003 Cobalt

ASTM B817 type II belongs to the titanium alloys classification, while R30003 cobalt belongs to the cobalt 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 ASTM B817 type II and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 3.0 to 13
10 to 73
Fatigue Strength, MPa 390 to 530
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 900 to 960
970 to 1720
Tensile Strength: Yield (Proof), MPa 780 to 900
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Melting Completion (Liquidus), °C 1580
1400
Melting Onset (Solidus), °C 1530
1440
Specific Heat Capacity, J/kg-K 550
450
Thermal Expansion, µm/m-K 9.9
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
95
Density, g/cm3 4.6
8.4
Embodied Carbon, kg CO2/kg material 40
8.0
Embodied Energy, MJ/kg 650
110
Embodied Water, L/kg 220
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
24
Strength to Weight: Axial, points 55 to 58
32 to 57
Strength to Weight: Bending, points 45 to 47
26 to 38
Thermal Shock Resistance, points 62 to 66
26 to 45

Alloy Composition

Aluminum (Al), % 5.0 to 6.0
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.1
0 to 0.15
Chlorine (Cl), % 0 to 0.2
0
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0.35 to 1.0
10 to 20.5
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
14 to 16
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 1.2
Sodium (Na), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0