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EN 1.7272 Steel vs. R30816 Cobalt

EN 1.7272 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.7272 steel and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 490 to 1650
1020

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1460
1540
Melting Onset (Solidus), °C 1420
1460
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 45
13
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 7.8
9.1
Embodied Carbon, kg CO2/kg material 1.5
20
Embodied Energy, MJ/kg 19
320
Embodied Water, L/kg 49
440

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 17 to 59
31
Strength to Weight: Bending, points 18 to 40
25
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 14 to 48
28

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.28 to 0.33
0.32 to 0.42
Chromium (Cr), % 0.4 to 0.55
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 97.2 to 98.3
0 to 5.0
Manganese (Mn), % 0.9 to 1.2
1.0 to 2.0
Molybdenum (Mo), % 0.1 to 0.15
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5