MakeItFrom.com
Menu (ESC)

R30021 Cobalt vs. EN 1.5525 Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.5525 steel belongs to the iron alloys. There are 27 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 R30021 cobalt and the bottom bar is EN 1.5525 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 9.0
11 to 21
Fatigue Strength, MPa 250
210 to 310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 700
440 to 1440
Tensile Strength: Yield (Proof), MPa 500
300 to 490

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1190
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
50
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 520
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
44 to 240
Resilience: Unit (Modulus of Resilience), kJ/m3 570
240 to 640
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
16 to 51
Strength to Weight: Bending, points 21
16 to 36
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 21
13 to 42

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.2 to 0.35
0.18 to 0.23
Chromium (Cr), % 26 to 29
0 to 0.3
Cobalt (Co), % 61.7 to 67.3
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
97.7 to 98.9
Manganese (Mn), % 0
0.9 to 1.2
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 1.5
0 to 0.3
Sulfur (S), % 0
0 to 0.025