MakeItFrom.com
Menu (ESC)

R31538 Cobalt vs. ASTM A148 Cast Steel

R31538 cobalt belongs to the cobalt alloys classification, while ASTM A148 cast steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is ASTM A148 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 23
5.7 to 25
Fatigue Strength, MPa 310 to 480
280 to 670
Poisson's Ratio 0.29
0.29
Reduction in Area, % 13 to 22
13 to 45
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
630 to 1300
Tensile Strength: Yield (Proof), MPa 580 to 930
390 to 1160

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
37 to 47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3 to 7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.3 to 8.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.5 to 1.7
Embodied Energy, MJ/kg 110
20 to 22
Embodied Water, L/kg 530
48 to 53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
400 to 3570
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 34 to 45
22 to 46
Strength to Weight: Bending, points 27 to 32
21 to 34
Thermal Diffusivity, mm2/s 3.5
9.9 to 13
Thermal Shock Resistance, points 25 to 33
18 to 38

Comparable Variants