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R30556 Alloy vs. R30008 Cobalt

R30556 alloy belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have 74% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 45
1.1 to 73
Fatigue Strength, MPa 320
320 to 530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
83
Tensile Strength: Ultimate (UTS), MPa 780
950 to 1700
Tensile Strength: Yield (Proof), MPa 350
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1330
1330
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
95
Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.7
8.1
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 300
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 290
590 to 2720
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
31 to 56
Strength to Weight: Bending, points 22
25 to 37
Thermal Shock Resistance, points 18
25 to 44

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0 to 0.0010
Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 21 to 23
18.5 to 21.5
Cobalt (Co), % 16 to 21
39 to 42
Iron (Fe), % 20.4 to 38.2
7.6 to 20
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
1.0 to 2.0
Molybdenum (Mo), % 2.5 to 4.0
6.5 to 7.5
Nickel (Ni), % 19 to 22.5
15 to 18
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0.2 to 0.8
0 to 1.2
Sulfur (S), % 0 to 0.015
0 to 0.015
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0.0010 to 0.1
0