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Grade 350 Maraging Steel vs. R31537 Cobalt

Grade 350 maraging steel belongs to the iron alloys classification, while R31537 cobalt belongs to the cobalt alloys. 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 350 maraging steel and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 4.1 to 18
14 to 23
Poisson's Ratio 0.3
0.29
Rockwell C Hardness 34 to 60
25 to 35
Shear Modulus, GPa 75
87
Tensile Strength: Ultimate (UTS), MPa 1140 to 2420
1000 to 1340
Tensile Strength: Yield (Proof), MPa 830 to 2300
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1420
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 5.6
8.1
Embodied Energy, MJ/kg 74
110
Embodied Water, L/kg 160
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 190
140 to 200
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 38 to 82
33 to 44
Strength to Weight: Bending, points 29 to 49
26 to 32
Thermal Shock Resistance, points 35 to 74
24 to 32

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 11.5 to 12.5
58.9 to 69
Iron (Fe), % 61.2 to 64.6
0 to 0.75
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 4.6 to 5.2
5.0 to 7.0
Nickel (Ni), % 18 to 19
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 1.3 to 1.6
0
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants