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R30155 Cobalt vs. ASTM A182 Grade F6b

Both R30155 cobalt and ASTM A182 grade F6b are iron alloys. They have 46% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 F6b.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
260
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
18
Fatigue Strength, MPa 310
440
Poisson's Ratio 0.29
0.28
Reduction in Area, % 34
51
Shear Modulus, GPa 81
76
Shear Strength, MPa 570
530
Tensile Strength: Ultimate (UTS), MPa 850
850
Tensile Strength: Yield (Proof), MPa 390
710

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
390
Maximum Temperature: Mechanical, °C 1100
750
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
25
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 80
8.0
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
2.2
Embodied Energy, MJ/kg 150
30
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 37
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
140
Resilience: Unit (Modulus of Resilience), kJ/m3 370
1280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
30
Strength to Weight: Bending, points 24
26
Thermal Diffusivity, mm2/s 3.2
6.7
Thermal Shock Resistance, points 21
31

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.15
Chromium (Cr), % 20 to 22.5
11.5 to 13.5
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 24.3 to 36.2
81.2 to 87.1
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0.4 to 0.6
Nickel (Ni), % 19 to 21
1.0 to 2.0
Niobium (Nb), % 0.75 to 1.3
0
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 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0