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ASTM F15 Fe-Ni-Co vs. ASTM Grade HI Steel

Both ASTM F15 Fe-Ni-Co and ASTM grade HI steel are iron alloys. They have 70% of their average alloy composition in common. There are 23 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 ASTM F15 Fe-Ni-Co and the bottom bar is ASTM grade HI 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
550

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1450
1350
Specific Heat Capacity, J/kg-K 460
490
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 6.0
17

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
23
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 5.2
4.1
Embodied Energy, MJ/kg 71
59
Embodied Water, L/kg 190
200

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 17 to 29
20
Strength to Weight: Bending, points 17 to 24
19
Thermal Diffusivity, mm2/s 4.5
3.9
Thermal Shock Resistance, points 32 to 55
12

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0 to 0.040
0.2 to 0.5
Chromium (Cr), % 0 to 0.2
26 to 30
Cobalt (Co), % 16 to 18
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 50.3 to 56
46.9 to 59.8
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.2
0 to 0.5
Nickel (Ni), % 28 to 30
14 to 18
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.1
0
Zirconium (Zr), % 0 to 0.1
0