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S41041 Stainless Steel vs. R30155 Cobalt

Both S41041 stainless steel and R30155 cobalt are iron alloys. They have 44% of their average alloy composition in common. There are 32 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 S41041 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
220
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17
34
Fatigue Strength, MPa 350
310
Poisson's Ratio 0.28
0.29
Reduction in Area, % 56
34
Shear Modulus, GPa 76
81
Shear Strength, MPa 560
570
Tensile Strength: Ultimate (UTS), MPa 910
850
Tensile Strength: Yield (Proof), MPa 580
390

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 430
570
Maximum Temperature: Mechanical, °C 740
1100
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 29
12
Thermal Expansion, µm/m-K 10
14

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 2.2
9.7
Embodied Energy, MJ/kg 31
150
Embodied Water, L/kg 100
300

Common Calculations

PREN (Pitting Resistance) 13
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
230
Resilience: Unit (Modulus of Resilience), kJ/m3 860
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 32
28
Strength to Weight: Bending, points 27
24
Thermal Diffusivity, mm2/s 7.8
3.2
Thermal Shock Resistance, points 33
21

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Carbon (C), % 0.13 to 0.18
0.080 to 0.16
Chromium (Cr), % 11.5 to 13
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 84.5 to 87.8
24.3 to 36.2
Manganese (Mn), % 0.4 to 0.6
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.2
2.5 to 3.5
Nickel (Ni), % 0 to 0.5
19 to 21
Niobium (Nb), % 0.15 to 0.45
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 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0