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EN 1.4034 Stainless Steel vs. R30008 Cobalt

EN 1.4034 stainless steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4034 stainless steel and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 11 to 14
1.1 to 73
Fatigue Strength, MPa 230 to 400
320 to 530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
83
Tensile Strength: Ultimate (UTS), MPa 690 to 900
950 to 1700
Tensile Strength: Yield (Proof), MPa 390 to 730
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1390
1330
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
95
Density, g/cm3 7.7
8.4
Embodied Carbon, kg CO2/kg material 2.0
8.1
Embodied Energy, MJ/kg 27
110
Embodied Water, L/kg 100
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1370
590 to 2720
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 32
31 to 56
Strength to Weight: Bending, points 22 to 27
25 to 37
Thermal Shock Resistance, points 24 to 32
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0.43 to 0.5
0 to 0.15
Chromium (Cr), % 12.5 to 14.5
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Iron (Fe), % 83 to 87.1
7.6 to 20
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0 to 0.015
0 to 0.015

Comparable Variants