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ASTM F15 Fe-Ni-Co vs. S33550 Stainless Steel

Both ASTM F15 Fe-Ni-Co and S33550 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 23 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 ASTM F15 Fe-Ni-Co and the bottom bar is S33550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 520 to 880
680

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1450
1360
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 6.0
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 49
24
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 5.2
4.3
Embodied Energy, MJ/kg 71
61
Embodied Water, L/kg 190
190

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 17 to 29
24
Strength to Weight: Bending, points 17 to 24
22
Thermal Diffusivity, mm2/s 4.5
3.9
Thermal Shock Resistance, points 32 to 55
15

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0 to 0.040
0.040 to 0.1
Cerium (Ce), % 0
0.025 to 0.070
Chromium (Cr), % 0 to 0.2
25 to 28
Cobalt (Co), % 16 to 18
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 50.3 to 56
48.8 to 58.2
Lanthanum (La), % 0
0.025 to 0.070
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.2
0
Nickel (Ni), % 28 to 30
16.5 to 20
Niobium (Nb), % 0
0.050 to 0.15
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zirconium (Zr), % 0 to 0.1
0