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EN 1.4923 Stainless Steel vs. R30021 Cobalt

EN 1.4923 stainless steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt 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 EN 1.4923 stainless steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 12 to 21
9.0
Fatigue Strength, MPa 300 to 440
250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 870 to 980
700
Tensile Strength: Yield (Proof), MPa 470 to 780
500

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1450
1350
Melting Onset (Solidus), °C 1410
1190
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 24
15
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.9
8.0
Embodied Energy, MJ/kg 41
110
Embodied Water, L/kg 100
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 150
57
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 1580
570
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 35
23
Strength to Weight: Bending, points 26 to 28
21
Thermal Diffusivity, mm2/s 6.5
3.8
Thermal Shock Resistance, points 30 to 34
21

Alloy Composition

Carbon (C), % 0.18 to 0.24
0.2 to 0.35
Chromium (Cr), % 11 to 12.5
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Iron (Fe), % 83.5 to 87.1
0 to 3.0
Manganese (Mn), % 0.4 to 0.9
0
Molybdenum (Mo), % 0.8 to 1.2
4.5 to 6.0
Nickel (Ni), % 0.3 to 0.8
2.0 to 3.0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.015
0
Vanadium (V), % 0.25 to 0.35
0