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EN 1.4945 Stainless Steel vs. R30008 Cobalt

EN 1.4945 stainless steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have 48% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 19 to 34
1.1 to 73
Fatigue Strength, MPa 230 to 350
320 to 530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
83
Tensile Strength: Ultimate (UTS), MPa 640 to 740
950 to 1700
Tensile Strength: Yield (Proof), MPa 290 to 550
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1490
1400
Melting Onset (Solidus), °C 1440
1330
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 30
95
Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 5.0
8.1
Embodied Energy, MJ/kg 73
110
Embodied Water, L/kg 150
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
590 to 2720
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 25
31 to 56
Strength to Weight: Bending, points 20 to 22
25 to 37
Thermal Shock Resistance, points 14 to 16
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0.040 to 0.1
0 to 0.15
Chromium (Cr), % 15.5 to 17.5
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Iron (Fe), % 57.9 to 65.7
7.6 to 20
Manganese (Mn), % 0 to 1.5
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 15.5 to 17.5
15 to 18
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0.3 to 0.6
0 to 1.2
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 2.5 to 3.5
0