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Grade 200 Maraging Steel vs. R30021 Cobalt

Grade 200 maraging steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade 200 maraging steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 730 to 1260
1300
Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 9.1 to 18
9.0
Poisson's Ratio 0.3
0.29
Rockwell C Hardness 29 to 45
32
Shear Modulus, GPa 74
86
Tensile Strength: Ultimate (UTS), MPa 970 to 1500
700
Tensile Strength: Yield (Proof), MPa 690 to 1490
500

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1420
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 4.5
8.0
Embodied Energy, MJ/kg 59
110
Embodied Water, L/kg 140
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1240 to 5740
570
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33 to 51
23
Strength to Weight: Bending, points 27 to 35
21
Thermal Shock Resistance, points 29 to 45
21

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
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 8.0 to 9.0
61.7 to 67.3
Iron (Fe), % 67.8 to 71.8
0 to 3.0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 3.0 to 3.5
4.5 to 6.0
Nickel (Ni), % 17 to 19
2.0 to 3.0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 1.5
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.020
0