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N08330 Stainless Steel vs. R30155 Cobalt

Both N08330 stainless steel and R30155 cobalt are iron alloys. They have 70% of their average alloy composition in common. There are 31 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 N08330 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
220
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
34
Fatigue Strength, MPa 190
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Shear Strength, MPa 360
570
Tensile Strength: Ultimate (UTS), MPa 550
850
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 420
570
Maximum Temperature: Mechanical, °C 1050
1100
Melting Completion (Liquidus), °C 1390
1470
Melting Onset (Solidus), °C 1340
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 32
80
Density, g/cm3 8.0
8.5
Embodied Carbon, kg CO2/kg material 5.4
9.7
Embodied Energy, MJ/kg 77
150
Embodied Water, L/kg 190
300

Common Calculations

PREN (Pitting Resistance) 19
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
230
Resilience: Unit (Modulus of Resilience), kJ/m3 140
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
28
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 3.1
3.2
Thermal Shock Resistance, points 13
21

Alloy Composition

Carbon (C), % 0 to 0.080
0.080 to 0.16
Chromium (Cr), % 17 to 20
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 38.3 to 48.3
24.3 to 36.2
Lead (Pb), % 0 to 0.0050
0
Manganese (Mn), % 0 to 2.0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 34 to 37
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.75 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tin (Sn), % 0 to 0.025
0
Tungsten (W), % 0
2.0 to 3.0