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EN 1.3967 Stainless Steel vs. R30016 Cobalt

EN 1.3967 stainless steel belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.3967 stainless steel and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 22
8.4
Fatigue Strength, MPa 240
290
Impact Strength: V-Notched Charpy, J 74
8.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
85
Tensile Strength: Ultimate (UTS), MPa 690
1010
Tensile Strength: Yield (Proof), MPa 350
580

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1430
1360
Melting Onset (Solidus), °C 1380
1270
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.5
Embodied Carbon, kg CO2/kg material 4.8
7.7
Embodied Energy, MJ/kg 66
110
Embodied Water, L/kg 180
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
72
Resilience: Unit (Modulus of Resilience), kJ/m3 310
770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
33
Strength to Weight: Bending, points 22
26
Thermal Shock Resistance, points 15
24

Alloy Composition

Carbon (C), % 0 to 0.030
0.9 to 1.4
Chromium (Cr), % 20 to 21.5
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Iron (Fe), % 50.3 to 57.8
0 to 3.0
Manganese (Mn), % 4.0 to 6.0
0.5 to 2.0
Molybdenum (Mo), % 3.0 to 3.5
0 to 1.5
Nickel (Ni), % 15 to 17
0 to 3.0
Niobium (Nb), % 0 to 0.25
0
Nitrogen (N), % 0.2 to 0.35
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 1.0
0.2 to 2.0
Sulfur (S), % 0 to 0.010
0
Tungsten (W), % 0
3.5 to 5.5