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EN 1.4749 Stainless Steel vs. R30155 Cobalt

Both EN 1.4749 stainless steel and R30155 cobalt are iron alloys. They have 53% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4749 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
220
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 16
34
Fatigue Strength, MPa 190
310
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
81
Shear Strength, MPa 370
570
Tensile Strength: Ultimate (UTS), MPa 600
850
Tensile Strength: Yield (Proof), MPa 320
390

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
570
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 490
450
Thermal Conductivity, W/m-K 17
12
Thermal Expansion, µm/m-K 9.6
14

Otherwise Unclassified Properties

Base Metal Price, % relative 13
80
Density, g/cm3 7.6
8.5
Embodied Carbon, kg CO2/kg material 2.5
9.7
Embodied Energy, MJ/kg 36
150
Embodied Water, L/kg 160
300

Common Calculations

PREN (Pitting Resistance) 31
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
230
Resilience: Unit (Modulus of Resilience), kJ/m3 250
370
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
23
Strength to Weight: Axial, points 22
28
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.6
3.2
Thermal Shock Resistance, points 22
21

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.080 to 0.16
Chromium (Cr), % 26 to 29
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 68.5 to 73.7
24.3 to 36.2
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0.15 to 0.25
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
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