MakeItFrom.com
Menu (ESC)

Grey Cast Iron vs. R30008 Cobalt

Grey cast iron belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 23 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 grey cast iron and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 9.6
1.1 to 73
Fatigue Strength, MPa 69 to 170
320 to 530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 69
83
Tensile Strength: Ultimate (UTS), MPa 160 to 450
950 to 1700
Tensile Strength: Yield (Proof), MPa 98 to 290
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1180
1330
Specific Heat Capacity, J/kg-K 490
450
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
95
Density, g/cm3 7.5
8.4
Embodied Carbon, kg CO2/kg material 1.5
8.1
Embodied Energy, MJ/kg 21
110
Embodied Water, L/kg 44
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 240
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.8 to 17
31 to 56
Strength to Weight: Bending, points 8.7 to 17
25 to 37
Thermal Shock Resistance, points 6.0 to 17
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 3.1 to 3.4
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Iron (Fe), % 92.1 to 93.9
7.6 to 20
Manganese (Mn), % 0.5 to 0.7
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Phosphorus (P), % 0 to 0.9
0 to 0.015
Silicon (Si), % 2.5 to 2.8
0 to 1.2
Sulfur (S), % 0 to 0.15
0 to 0.015