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EN 1.4874 Stainless Steel vs. R30012 Cobalt

EN 1.4874 stainless steel belongs to the iron alloys classification, while R30012 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 (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 R30012 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
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
86
Tensile Strength: Ultimate (UTS), MPa 480
830
Tensile Strength: Yield (Proof), MPa 360
650

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1280
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.8
Embodied Carbon, kg CO2/kg material 7.6
8.3
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 290
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 310
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 16
26
Strength to Weight: Bending, points 16
22
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 11
23

Alloy Composition

Carbon (C), % 0.35 to 0.65
1.4 to 2.0
Chromium (Cr), % 19 to 22
27 to 32
Cobalt (Co), % 18.5 to 22
47.5 to 64.1
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
7.5 to 9.5