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R60705 Alloy vs. R30008 Cobalt

R60705 alloy belongs to the otherwise unclassified metals classification, while R30008 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R60705 alloy and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
210
Elongation at Break, % 18
1.1 to 73
Fatigue Strength, MPa 290
320 to 530
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 37
83
Tensile Strength: Ultimate (UTS), MPa 540
950 to 1700
Tensile Strength: Yield (Proof), MPa 430
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Specific Heat Capacity, J/kg-K 270
450
Thermal Expansion, µm/m-K 6.3
13

Otherwise Unclassified Properties

Density, g/cm3 6.7
8.4
Embodied Water, L/kg 450
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 950
590 to 2720
Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 22
31 to 56
Strength to Weight: Bending, points 22
25 to 37
Thermal Shock Resistance, points 63
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0 to 0.050
0 to 0.15
Chromium (Cr), % 0 to 0.2
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.2
7.6 to 20
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Niobium (Nb), % 2.0 to 3.0
0
Nitrogen (N), % 0 to 0.025
0
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Zirconium (Zr), % 91 to 98
0