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ASTM F15 Fe-Ni-Co vs. SAE-AISI H21 Steel

Both ASTM F15 Fe-Ni-Co and SAE-AISI H21 steel are iron alloys. They have 54% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (4, 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 SAE-AISI H21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 520 to 880
720 to 1790

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1410
1630
Melting Onset (Solidus), °C 1450
1580
Specific Heat Capacity, J/kg-K 460
440
Thermal Conductivity, W/m-K 17
27
Thermal Expansion, µm/m-K 6.0
11

Otherwise Unclassified Properties

Base Metal Price, % relative 49
23
Density, g/cm3 8.3
8.5
Embodied Carbon, kg CO2/kg material 5.2
4.5
Embodied Energy, MJ/kg 71
68
Embodied Water, L/kg 190
72

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 17 to 29
23 to 58
Strength to Weight: Bending, points 17 to 24
21 to 38
Thermal Diffusivity, mm2/s 4.5
7.1
Thermal Shock Resistance, points 32 to 55
24 to 59

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0 to 0.040
0.28 to 0.36
Chromium (Cr), % 0 to 0.2
3.0 to 3.8
Cobalt (Co), % 16 to 18
0
Copper (Cu), % 0 to 0.2
0 to 0.25
Iron (Fe), % 50.3 to 56
87.6 to 93.8
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.2
0
Nickel (Ni), % 28 to 30
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0.15 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
8.5 to 10
Vanadium (V), % 0
0.3 to 0.6
Zirconium (Zr), % 0 to 0.1
0

Comparable Variants