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EN 1.4874 Stainless Steel vs. R30605 Cobalt

EN 1.4874 stainless steel belongs to the iron alloys classification, while R30605 cobalt belongs to the cobalt alloys. They have 56% of their average alloy composition in common. There are 23 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 EN 1.4874 stainless steel and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 6.7
34
Fatigue Strength, MPa 180
260 to 590
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
81
Tensile Strength: Ultimate (UTS), MPa 480
1130 to 1900
Tensile Strength: Yield (Proof), MPa 360
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1400
1330
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 13
9.6
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.6
Embodied Carbon, kg CO2/kg material 7.6
9.8
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 290
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 16
33 to 55
Strength to Weight: Bending, points 16
25 to 36
Thermal Diffusivity, mm2/s 3.3
2.5
Thermal Shock Resistance, points 11
31 to 52

Alloy Composition

Carbon (C), % 0.35 to 0.65
0.050 to 0.15
Chromium (Cr), % 19 to 22
19 to 21
Cobalt (Co), % 18.5 to 22
46.4 to 57
Iron (Fe), % 23 to 38.9
0 to 3.0
Manganese (Mn), % 0 to 2.0
1.0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 18 to 22
9.0 to 11
Niobium (Nb), % 0.75 to 1.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 2.0 to 3.0
14 to 16