MakeItFrom.com
Menu (ESC)

R31233 Cobalt vs. EN 1.7725 Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.7725 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 17
14
Fatigue Strength, MPa 220
390 to 550
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1020
830 to 1000
Tensile Strength: Yield (Proof), MPa 420
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 12
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 8.4
1.8
Embodied Energy, MJ/kg 110
24
Embodied Water, L/kg 480
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 410
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
29 to 35
Strength to Weight: Bending, points 26
25 to 28
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 25
24 to 29

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.27 to 0.34
Chromium (Cr), % 23.5 to 27.5
1.3 to 1.7
Cobalt (Co), % 44.7 to 63.3
0
Iron (Fe), % 1.0 to 5.0
95.7 to 97.5
Manganese (Mn), % 0.1 to 1.5
0.6 to 1.0
Molybdenum (Mo), % 4.0 to 6.0
0.3 to 0.5
Nickel (Ni), % 7.0 to 11
0
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.050 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 1.0 to 3.0
0
Vanadium (V), % 0
0.050 to 0.15