MakeItFrom.com
Menu (ESC)

R30003 Cobalt vs. S15500 Stainless Steel

R30003 cobalt belongs to the cobalt alloys classification, while S15500 stainless steel belongs to the iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30003 cobalt and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 10 to 73
6.8 to 16
Fatigue Strength, MPa 320 to 560
350 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 83
75
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
890 to 1490
Tensile Strength: Yield (Proof), MPa 510 to 1090
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1440
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 95
13
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.7
Embodied Energy, MJ/kg 110
39
Embodied Water, L/kg 400
130

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
890 to 4460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32 to 57
32 to 53
Strength to Weight: Bending, points 26 to 38
26 to 37
Thermal Diffusivity, mm2/s 3.3
4.6
Thermal Shock Resistance, points 26 to 45
30 to 50

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0 to 0.070
Chromium (Cr), % 19 to 21
14 to 15.5
Cobalt (Co), % 39 to 41
0
Copper (Cu), % 0
2.5 to 4.5
Iron (Fe), % 10 to 20.5
71.9 to 79.9
Manganese (Mn), % 1.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030