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R30075 Cobalt vs. Grade 300 Maraging Steel

R30075 cobalt belongs to the cobalt alloys classification, while grade 300 maraging steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is grade 300 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
6.5 to 18
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 82 to 98
75
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
1030 to 2030
Tensile Strength: Yield (Proof), MPa 480 to 840
760 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1480
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 8.1
5.1
Embodied Energy, MJ/kg 110
68
Embodied Water, L/kg 530
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
130 to 170
Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
23
Strength to Weight: Axial, points 26 to 42
35 to 68
Strength to Weight: Bending, points 22 to 31
28 to 43
Thermal Shock Resistance, points 21 to 29
31 to 62

Alloy Composition

Aluminum (Al), % 0 to 0.1
0.050 to 0.15
Boron (B), % 0 to 0.010
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0 to 0.35
0 to 0.030
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
8.5 to 9.5
Iron (Fe), % 0 to 0.75
65 to 68.4
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 5.0 to 7.0
4.6 to 5.2
Nickel (Ni), % 0 to 0.5
18 to 19
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0 to 0.1
0.5 to 0.8
Tungsten (W), % 0 to 0.2
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants