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R30155 Cobalt vs. ASTM A182 Grade F3VCb

Both R30155 cobalt and ASTM A182 grade F3VCb are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is ASTM A182 grade F3VCb.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
21
Fatigue Strength, MPa 310
320
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
50
Shear Modulus, GPa 81
74
Shear Strength, MPa 570
420
Tensile Strength: Ultimate (UTS), MPa 850
670
Tensile Strength: Yield (Proof), MPa 390
460

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
470
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
40
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
4.5
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
2.4
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 300
64

Common Calculations

PREN (Pitting Resistance) 37
6.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
570
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
24
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 21
19

Alloy Composition

Calcium (Ca), % 0
0.00050 to 0.015
Carbon (C), % 0.080 to 0.16
0.1 to 0.15
Chromium (Cr), % 20 to 22.5
2.7 to 3.3
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 36.2
93.8 to 95.8
Manganese (Mn), % 1.0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0.9 to 1.1
Nickel (Ni), % 19 to 21
0 to 0.25
Niobium (Nb), % 0.75 to 1.3
0.015 to 0.070
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 0.75 to 1.3
0
Titanium (Ti), % 0
0 to 0.015
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0.2 to 0.3