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SAE-AISI H13 Steel vs. R30155 Cobalt

Both SAE-AISI H13 steel and R30155 cobalt are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H13 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 74
81
Tensile Strength: Ultimate (UTS), MPa 690 to 1820
850

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 29
12
Thermal Expansion, µm/m-K 10
14

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 4.3
9.7
Embodied Energy, MJ/kg 64
150
Embodied Water, L/kg 78
300

Common Calculations

PREN (Pitting Resistance) 9.9
37
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 25 to 65
28
Strength to Weight: Bending, points 22 to 43
24
Thermal Diffusivity, mm2/s 7.8
3.2
Thermal Shock Resistance, points 25 to 65
21

Alloy Composition

Carbon (C), % 0.32 to 0.45
0.080 to 0.16
Chromium (Cr), % 4.8 to 5.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.8 to 92
24.3 to 36.2
Manganese (Mn), % 0.2 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 1.1 to 1.8
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), % 0.8 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Vanadium (V), % 0.8 to 1.2
0