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EN 1.4874 Stainless Steel vs. R30006 Cobalt

EN 1.4874 stainless steel belongs to the iron alloys classification, while R30006 cobalt belongs to the cobalt alloys. They have 48% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 6.7
1.0
Fatigue Strength, MPa 180
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
85
Tensile Strength: Ultimate (UTS), MPa 480
900
Tensile Strength: Yield (Proof), MPa 360
540

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 7.6
7.8
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 290
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 310
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 16
29
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 3.3
3.9
Thermal Shock Resistance, points 11
26

Alloy Composition

Carbon (C), % 0.35 to 0.65
0.9 to 1.4
Chromium (Cr), % 19 to 22
27 to 32
Cobalt (Co), % 18.5 to 22
48.6 to 68.1
Iron (Fe), % 23 to 38.9
0 to 3.0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 2.5 to 3.0
0 to 1.0
Nickel (Ni), % 18 to 22
0 to 3.0
Niobium (Nb), % 0.75 to 1.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 2.0 to 3.0
4.0 to 6.0