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EN 1.4542 Stainless Steel vs. R30012 Cobalt

EN 1.4542 stainless steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4542 stainless steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 5.7 to 20
1.0
Fatigue Strength, MPa 370 to 640
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 880 to 1470
830
Tensile Strength: Yield (Proof), MPa 580 to 1300
650

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1280
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 2.7
8.3
Embodied Energy, MJ/kg 39
120
Embodied Water, L/kg 130
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 62 to 160
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4360
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 31 to 52
26
Strength to Weight: Bending, points 26 to 37
22
Thermal Diffusivity, mm2/s 4.3
3.8
Thermal Shock Resistance, points 29 to 49
23

Alloy Composition

Carbon (C), % 0 to 0.070
1.4 to 2.0
Chromium (Cr), % 15 to 17
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 69.6 to 79
0 to 3.0
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.6
0 to 1.0
Nickel (Ni), % 3.0 to 5.0
0 to 3.0
Niobium (Nb), % 0 to 0.45
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.7
0 to 2.0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 0
7.5 to 9.5