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EN 1.1170 Steel vs. R30816 Cobalt

EN 1.1170 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.1170 steel and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
280
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 16 to 17
23
Fatigue Strength, MPa 220 to 330
250
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 640 to 730
1020
Tensile Strength: Yield (Proof), MPa 330 to 500
460

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 50
13
Thermal Expansion, µm/m-K 12
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

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 100
190
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 670
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 23 to 26
31
Strength to Weight: Bending, points 21 to 23
25
Thermal Diffusivity, mm2/s 13
3.3
Thermal Shock Resistance, points 20 to 23
28

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.32 to 0.42
Chromium (Cr), % 0 to 0.4
19 to 21
Cobalt (Co), % 0
40 to 49.8
Iron (Fe), % 96.7 to 98.5
0 to 5.0
Manganese (Mn), % 1.3 to 1.7
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.1
3.5 to 4.5
Nickel (Ni), % 0 to 0.4
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5