MakeItFrom.com
Menu (ESC)

R30155 Cobalt vs. S35125 Stainless Steel

Both R30155 cobalt and S35125 stainless steel are iron alloys. They have 76% of their average alloy composition in common. 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 S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
39
Fatigue Strength, MPa 310
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
78
Shear Strength, MPa 570
370
Tensile Strength: Ultimate (UTS), MPa 850
540
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
490
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 80
36
Density, g/cm3 8.5
8.1
Embodied Carbon, kg CO2/kg material 9.7
6.4
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 300
210

Common Calculations

PREN (Pitting Resistance) 37
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
170
Resilience: Unit (Modulus of Resilience), kJ/m3 370
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 3.2
3.1
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.1
Chromium (Cr), % 20 to 22.5
20 to 23
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
36.2 to 45.8
Manganese (Mn), % 1.0 to 2.0
1.0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
2.0 to 3.0
Nickel (Ni), % 19 to 21
31 to 35
Niobium (Nb), % 0.75 to 1.3
0.25 to 0.6
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0