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Grade 300 Maraging Steel vs. R30008 Cobalt

Grade 300 maraging steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have 44% of their average alloy composition in common. There are 21 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 grade 300 maraging 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, % 6.5 to 18
1.1 to 73
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
83
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
950 to 1700
Tensile Strength: Yield (Proof), MPa 760 to 1990
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1480
1400
Melting Onset (Solidus), °C 1430
1330
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 34
95
Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 5.1
8.1
Embodied Energy, MJ/kg 68
110
Embodied Water, L/kg 150
400

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 35 to 68
31 to 56
Strength to Weight: Bending, points 28 to 43
25 to 37
Thermal Shock Resistance, points 31 to 62
25 to 44

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0 to 0.0010
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 8.5 to 9.5
39 to 42
Iron (Fe), % 65 to 68.4
7.6 to 20
Manganese (Mn), % 0 to 0.1
1.0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
6.5 to 7.5
Nickel (Ni), % 18 to 19
15 to 18
Phosphorus (P), % 0 to 0.010
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 1.2
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0.5 to 0.8
0
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants