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SAE-AISI H19 Steel vs. R30155 Cobalt

Both SAE-AISI H19 steel and R30155 cobalt are iron alloys. They have 43% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H19 steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
81
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
850

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1540
1470
Melting Onset (Solidus), °C 1490
1420
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 29
12
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 22
80
Density, g/cm3 8.2
8.5
Embodied Carbon, kg CO2/kg material 7.5
9.7
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 110
300

Common Calculations

PREN (Pitting Resistance) 13
37
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 24 to 68
28
Strength to Weight: Bending, points 22 to 43
24
Thermal Diffusivity, mm2/s 7.9
3.2
Thermal Shock Resistance, points 21 to 59
21

Alloy Composition

Carbon (C), % 0.32 to 0.45
0.080 to 0.16
Chromium (Cr), % 4.0 to 4.8
20 to 22.5
Cobalt (Co), % 4.0 to 4.5
18.5 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 85.5
24.3 to 36.2
Manganese (Mn), % 0.2 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 0.3 to 0.55
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 3.8 to 4.5
2.0 to 3.0
Vanadium (V), % 1.8 to 2.2
0