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S64512 Stainless Steel vs. R30075 Cobalt

S64512 stainless steel belongs to the iron alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S64512 stainless steel and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210 to 250
Elongation at Break, % 17
12
Fatigue Strength, MPa 540
250 to 840
Poisson's Ratio 0.28
0.29
Reduction in Area, % 34
20
Shear Modulus, GPa 76
82 to 98
Tensile Strength: Ultimate (UTS), MPa 1140
780 to 1280
Tensile Strength: Yield (Proof), MPa 890
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 28
13
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 3.3
8.1
Embodied Energy, MJ/kg 47
110
Embodied Water, L/kg 110
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 2020
560 to 1410
Stiffness to Weight: Axial, points 14
14 to 17
Stiffness to Weight: Bending, points 25
24 to 25
Strength to Weight: Axial, points 40
26 to 42
Strength to Weight: Bending, points 31
22 to 31
Thermal Diffusivity, mm2/s 7.5
3.5
Thermal Shock Resistance, points 42
21 to 29

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0.080 to 0.15
0 to 0.35
Chromium (Cr), % 11 to 12.5
27 to 30
Cobalt (Co), % 0
58.7 to 68
Iron (Fe), % 80.6 to 84.7
0 to 0.75
Manganese (Mn), % 0.5 to 0.9
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
5.0 to 7.0
Nickel (Ni), % 2.0 to 3.0
0 to 0.5
Nitrogen (N), % 0.010 to 0.050
0 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 0
0 to 0.2
Vanadium (V), % 0.25 to 0.4
0