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EN 1.4313 Stainless Steel vs. R30155 Cobalt

Both EN 1.4313 stainless steel and R30155 cobalt are iron alloys. They have 49% of their average alloy composition in common. There are 30 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 EN 1.4313 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 12 to 17
34
Fatigue Strength, MPa 340 to 510
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Shear Strength, MPa 460 to 600
570
Tensile Strength: Ultimate (UTS), MPa 750 to 1000
850
Tensile Strength: Yield (Proof), MPa 580 to 910
390

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
570
Maximum Temperature: Mechanical, °C 780
1100
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 10
14

Otherwise Unclassified Properties

Base Metal Price, % relative 10
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 2.4
9.7
Embodied Energy, MJ/kg 34
150
Embodied Water, L/kg 110
300

Common Calculations

PREN (Pitting Resistance) 15
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 150
230
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 2100
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 27 to 36
28
Strength to Weight: Bending, points 23 to 28
24
Thermal Diffusivity, mm2/s 6.7
3.2
Thermal Shock Resistance, points 27 to 36
21

Alloy Composition

Carbon (C), % 0 to 0.050
0.080 to 0.16
Chromium (Cr), % 12 to 14
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 78.5 to 84.2
24.3 to 36.2
Manganese (Mn), % 0 to 1.5
1.0 to 2.0
Molybdenum (Mo), % 0.3 to 0.7
2.5 to 3.5
Nickel (Ni), % 3.5 to 4.5
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0 to 0.020
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0