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EN 1.3967 Stainless Steel vs. R30155 Cobalt

Both EN 1.3967 stainless steel and R30155 cobalt are iron alloys. They have 72% of their average alloy composition in common. There are 28 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 1.3967 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
220
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 22
34
Fatigue Strength, MPa 240
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 690
850
Tensile Strength: Yield (Proof), MPa 350
390

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 440
570
Maximum Temperature: Mechanical, °C 1070
1100
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 25
80
Density, g/cm3 7.9
8.5
Embodied Carbon, kg CO2/kg material 4.8
9.7
Embodied Energy, MJ/kg 66
150
Embodied Water, L/kg 180
300

Common Calculations

PREN (Pitting Resistance) 36
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
230
Resilience: Unit (Modulus of Resilience), kJ/m3 310
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24
28
Strength to Weight: Bending, points 22
24
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0 to 0.030
0.080 to 0.16
Chromium (Cr), % 20 to 21.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 50.3 to 57.8
24.3 to 36.2
Manganese (Mn), % 4.0 to 6.0
1.0 to 2.0
Molybdenum (Mo), % 3.0 to 3.5
2.5 to 3.5
Nickel (Ni), % 15 to 17
19 to 21
Niobium (Nb), % 0 to 0.25
0.75 to 1.3
Nitrogen (N), % 0.2 to 0.35
0 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0