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R30155 Cobalt vs. EN 1.4057 Stainless Steel

Both R30155 cobalt and EN 1.4057 stainless steel are iron alloys. They have 50% 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 R30155 cobalt and the bottom bar is EN 1.4057 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
11 to 17
Fatigue Strength, MPa 310
320 to 430
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 570
520 to 580
Tensile Strength: Ultimate (UTS), MPa 850
840 to 980
Tensile Strength: Yield (Proof), MPa 390
530 to 790

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 570
400
Maximum Temperature: Mechanical, °C 1100
850
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
25
Thermal Expansion, µm/m-K 14
10

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.5
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 9.7
2.2
Embodied Energy, MJ/kg 150
32
Embodied Water, L/kg 300
120

Common Calculations

PREN (Pitting Resistance) 37
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
96 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 370
700 to 1610
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
30 to 35
Strength to Weight: Bending, points 24
26 to 28
Thermal Diffusivity, mm2/s 3.2
6.7
Thermal Shock Resistance, points 21
30 to 35

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.12 to 0.22
Chromium (Cr), % 20 to 22.5
15 to 17
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
77.7 to 83.4
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
1.5 to 2.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0