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ASTM F15 Fe-Ni-Co vs. ASTM A227 Spring Steel

Both ASTM F15 Fe-Ni-Co and ASTM A227 spring steel are iron alloys. They have 54% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 520 to 880
1720 to 2220

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 17
52
Thermal Expansion, µm/m-K 6.0
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 49
1.8
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 5.2
1.4
Embodied Energy, MJ/kg 71
19
Embodied Water, L/kg 190
46

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 17 to 29
61 to 79
Strength to Weight: Bending, points 17 to 24
41 to 48
Thermal Diffusivity, mm2/s 4.5
14
Thermal Shock Resistance, points 32 to 55
55 to 71

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0 to 0.040
0.45 to 0.85
Chromium (Cr), % 0 to 0.2
0
Cobalt (Co), % 16 to 18
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 50.3 to 56
97.4 to 99.1
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.3 to 1.3
Molybdenum (Mo), % 0 to 0.2
0
Nickel (Ni), % 28 to 30
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.1
0
Zirconium (Zr), % 0 to 0.1
0

Comparable Variants