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R30155 Cobalt vs. SAE-AISI 1070 Steel

Both R30155 cobalt and SAE-AISI 1070 steel are iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is SAE-AISI 1070 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
190 to 230
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
10 to 13
Fatigue Strength, MPa 310
270 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
34 to 51
Shear Modulus, GPa 81
72
Shear Strength, MPa 570
380 to 460
Tensile Strength: Ultimate (UTS), MPa 850
640 to 760
Tensile Strength: Yield (Proof), MPa 390
420 to 560

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
50
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
1.8
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 300
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
59 to 86
Resilience: Unit (Modulus of Resilience), kJ/m3 370
470 to 850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
23 to 27
Strength to Weight: Bending, points 24
21 to 24
Thermal Diffusivity, mm2/s 3.2
14
Thermal Shock Resistance, points 21
21 to 25

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.65 to 0.75
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
98.3 to 98.8
Manganese (Mn), % 1.0 to 2.0
0.6 to 0.9
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0