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EN 1.4901 Stainless Steel vs. R30816 Cobalt

EN 1.4901 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.4901 stainless steel and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 19
23
Fatigue Strength, MPa 310
250
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 740
1020
Tensile Strength: Yield (Proof), MPa 490
460

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1490
1540
Melting Onset (Solidus), °C 1450
1460
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 26
13
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 7.9
9.1
Embodied Carbon, kg CO2/kg material 2.8
20
Embodied Energy, MJ/kg 40
320
Embodied Water, L/kg 89
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 620
510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 26
31
Strength to Weight: Bending, points 23
25
Thermal Diffusivity, mm2/s 6.9
3.3
Thermal Shock Resistance, points 23
28

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
0.32 to 0.42
Chromium (Cr), % 8.5 to 9.5
19 to 21
Cobalt (Co), % 0
40 to 49.8
Iron (Fe), % 85.8 to 89.1
0 to 5.0
Manganese (Mn), % 0.3 to 0.6
1.0 to 2.0
Molybdenum (Mo), % 0.3 to 0.6
3.5 to 4.5
Nickel (Ni), % 0 to 0.4
19 to 21
Niobium (Nb), % 0.040 to 0.090
3.5 to 4.5
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.0
3.5 to 4.5
Vanadium (V), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0