MakeItFrom.com
Menu (ESC)

ASTM Grade LC9 Steel vs. R30021 Cobalt

ASTM grade LC9 steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 25 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 ASTM grade LC9 steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 22
9.0
Fatigue Strength, MPa 420
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
86
Tensile Strength: Ultimate (UTS), MPa 660
700
Tensile Strength: Yield (Proof), MPa 590
500

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Melting Completion (Liquidus), °C 1450
1350
Melting Onset (Solidus), °C 1410
1190
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 2.3
8.0
Embodied Energy, MJ/kg 31
110
Embodied Water, L/kg 65
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
57
Resilience: Unit (Modulus of Resilience), kJ/m3 920
570
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
23
Strength to Weight: Bending, points 21
21
Thermal Shock Resistance, points 20
21

Alloy Composition

Carbon (C), % 0 to 0.13
0.2 to 0.35
Chromium (Cr), % 0 to 0.5
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.4 to 91.5
0 to 3.0
Manganese (Mn), % 0 to 0.9
0
Molybdenum (Mo), % 0 to 0.2
4.5 to 6.0
Nickel (Ni), % 8.5 to 10
2.0 to 3.0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.45
0 to 1.5
Sulfur (S), % 0 to 0.045
0
Vanadium (V), % 0 to 0.030
0