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EN 1.4710 Stainless Steel vs. R30816 Cobalt

EN 1.4710 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is EN 1.4710 stainless steel and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
280
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20
23
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 74
81

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Melting Completion (Liquidus), °C 1430
1540
Melting Onset (Solidus), °C 1390
1460
Specific Heat Capacity, J/kg-K 480
420
Thermal Conductivity, W/m-K 24
13
Thermal Expansion, µm/m-K 9.9
12

Otherwise Unclassified Properties

Density, g/cm3 7.7
9.1
Embodied Carbon, kg CO2/kg material 1.8
20
Embodied Energy, MJ/kg 24
320
Embodied Water, L/kg 76
440

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 6.5
3.3

Alloy Composition

Carbon (C), % 0.2 to 0.35
0.32 to 0.42
Chromium (Cr), % 6.0 to 8.0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Iron (Fe), % 87.4 to 92.3
0 to 5.0
Manganese (Mn), % 0.5 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.15
3.5 to 4.5
Nickel (Ni), % 0 to 0.5
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5