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Grade 250 Maraging Steel vs. R30035 Cobalt

Grade 250 maraging steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220 to 230
Elongation at Break, % 7.3 to 17
9.0 to 46
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
84 to 89
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
900 to 1900
Tensile Strength: Yield (Proof), MPa 660 to 1740
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1430
1320
Specific Heat Capacity, J/kg-K 450
440
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
100
Density, g/cm3 8.2
8.7
Embodied Carbon, kg CO2/kg material 4.9
10
Embodied Energy, MJ/kg 65
140
Embodied Water, L/kg 140
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
160 to 320
Stiffness to Weight: Axial, points 13
14 to 15
Stiffness to Weight: Bending, points 23
23 to 24
Strength to Weight: Axial, points 33 to 61
29 to 61
Strength to Weight: Bending, points 26 to 40
24 to 39
Thermal Shock Resistance, points 29 to 54
23 to 46

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0 to 0.015
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 7.0 to 8.5
29.1 to 39
Iron (Fe), % 66.3 to 71.1
0 to 1.0
Manganese (Mn), % 0 to 0.1
0 to 0.15
Molybdenum (Mo), % 4.6 to 5.2
9.0 to 10.5
Nickel (Ni), % 17 to 19
33 to 37
Phosphorus (P), % 0 to 0.010
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.15
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.3 to 0.5
0 to 1.0
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants