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SAE-AISI T5 Steel vs. R30003 Cobalt

SAE-AISI T5 steel belongs to the iron alloys classification, while R30003 cobalt belongs to the cobalt alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T5 steel and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
83
Tensile Strength: Ultimate (UTS), MPa 860 to 2140
970 to 1720

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1810
1400
Melting Onset (Solidus), °C 1750
1440
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 21
13
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
95
Density, g/cm3 9.4
8.4
Embodied Carbon, kg CO2/kg material 11
8.0
Embodied Energy, MJ/kg 170
110
Embodied Water, L/kg 140
400

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 25 to 63
32 to 57
Strength to Weight: Bending, points 21 to 39
26 to 38
Thermal Diffusivity, mm2/s 5.5
3.3
Thermal Shock Resistance, points 26 to 66
26 to 45

Alloy Composition

Boron (B), % 0
0 to 0.1
Carbon (C), % 0.75 to 0.85
0 to 0.15
Chromium (Cr), % 3.8 to 5.0
19 to 21
Cobalt (Co), % 7.0 to 9.5
39 to 41
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 60.6 to 68.3
10 to 20.5
Manganese (Mn), % 0.2 to 0.4
1.5 to 2.5
Molybdenum (Mo), % 0.5 to 1.3
6.0 to 8.0
Nickel (Ni), % 0 to 0.3
14 to 16
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.2 to 0.4
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.8 to 2.4
0

Comparable Variants