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R30006 Cobalt vs. Grade 250 Maraging Steel

R30006 cobalt belongs to the cobalt alloys classification, while grade 250 maraging steel belongs to the iron alloys. 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 R30006 cobalt and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1520
730 to 1660
Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
7.3 to 17
Poisson's Ratio 0.28
0.3
Rockwell C Hardness 40
30 to 53
Shear Modulus, GPa 85
75
Tensile Strength: Ultimate (UTS), MPa 900
970 to 1800
Tensile Strength: Yield (Proof), MPa 540
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1400
1480
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.2
Embodied Carbon, kg CO2/kg material 7.8
4.9
Embodied Energy, MJ/kg 110
65
Embodied Water, L/kg 500
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
130 to 150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 29
33 to 61
Strength to Weight: Bending, points 24
26 to 40
Thermal Shock Resistance, points 26
29 to 54

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0.9 to 1.4
0 to 0.030
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
7.0 to 8.5
Iron (Fe), % 0 to 3.0
66.3 to 71.1
Manganese (Mn), % 0
0 to 0.1
Molybdenum (Mo), % 0 to 1.0
4.6 to 5.2
Nickel (Ni), % 0 to 3.0
17 to 19
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 2.0
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Tungsten (W), % 4.0 to 6.0
0
Zirconium (Zr), % 0
0 to 0.020