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R30605 Cobalt vs. EN 1.4525 Stainless Steel

R30605 cobalt belongs to the cobalt alloys classification, while EN 1.4525 stainless steel belongs to the iron alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
5.6 to 13
Fatigue Strength, MPa 260 to 590
480 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
1030 to 1250
Tensile Strength: Yield (Proof), MPa 470 to 1600
840 to 1120

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 9.6
18
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.6

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
2.8
Embodied Energy, MJ/kg 140
39
Embodied Water, L/kg 450
130

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
36 to 45
Strength to Weight: Bending, points 25 to 36
29 to 33
Thermal Diffusivity, mm2/s 2.5
4.7
Thermal Shock Resistance, points 31 to 52
34 to 41

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.070
Chromium (Cr), % 19 to 21
15 to 17
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
2.5 to 4.0
Iron (Fe), % 0 to 3.0
70.4 to 79
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.8
Nickel (Ni), % 9.0 to 11
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 14 to 16
0

Comparable Variants