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EN 1.4525 Stainless Steel vs. R30155 Cobalt

Both EN 1.4525 stainless steel and R30155 cobalt are iron alloys. They have 52% of their average alloy composition in common. There are 29 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 1.4525 stainless steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 5.6 to 13
34
Fatigue Strength, MPa 480 to 540
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 1030 to 1250
850
Tensile Strength: Yield (Proof), MPa 840 to 1120
390

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 430
570
Maximum Temperature: Mechanical, °C 860
1100
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 18
12
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 13
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 2.8
9.7
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
300

Common Calculations

PREN (Pitting Resistance) 18
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 130
230
Resilience: Unit (Modulus of Resilience), kJ/m3 1820 to 3230
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 36 to 45
28
Strength to Weight: Bending, points 29 to 33
24
Thermal Diffusivity, mm2/s 4.7
3.2
Thermal Shock Resistance, points 34 to 41
21

Alloy Composition

Carbon (C), % 0 to 0.070
0.080 to 0.16
Chromium (Cr), % 15 to 17
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 2.5 to 4.0
0
Iron (Fe), % 70.4 to 79
24.3 to 36.2
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.8
2.5 to 3.5
Nickel (Ni), % 3.5 to 5.5
19 to 21
Niobium (Nb), % 0 to 0.35
0.75 to 1.3
Nitrogen (N), % 0 to 0.050
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0