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SAE-AISI F2 Steel vs. SAE-AISI A4 Steel

Both SAE-AISI F2 steel and SAE-AISI A4 steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI F2 steel and the bottom bar is SAE-AISI A4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 710 to 2360
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1520
1450
Melting Onset (Solidus), °C 1470
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 42
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.9
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 32
24
Embodied Water, L/kg 50
59

Common Calculations

PREN (Pitting Resistance) 6.5
5.3
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 81
25 to 73
Strength to Weight: Bending, points 22 to 49
23 to 46
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 21 to 71
23 to 67

Alloy Composition

Carbon (C), % 1.2 to 1.4
1.0 to 1.1
Chromium (Cr), % 0.2 to 0.4
0.9 to 2.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 92.6 to 95.4
92 to 95.5
Manganese (Mn), % 0.1 to 0.5
1.8 to 2.2
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.1 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 3.0 to 4.5
0

Comparable Variants