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R30006 Cobalt vs. EN 1.4057 Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.4057 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.4057 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
11 to 17
Fatigue Strength, MPa 260
320 to 430
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 900
840 to 980
Tensile Strength: Yield (Proof), MPa 540
530 to 790

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1290
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 7.8
2.2
Embodied Energy, MJ/kg 110
32
Embodied Water, L/kg 500
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
96 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 670
700 to 1610
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
30 to 35
Strength to Weight: Bending, points 24
26 to 28
Thermal Diffusivity, mm2/s 3.9
6.7
Thermal Shock Resistance, points 26
30 to 35

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.12 to 0.22
Chromium (Cr), % 27 to 32
15 to 17
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
77.7 to 83.4
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
1.5 to 2.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 4.0 to 6.0
0