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SAE-AISI F1 Steel vs. SAE-AISI A4 Steel

Both SAE-AISI F1 steel and SAE-AISI A4 steel are iron alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI F1 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 72
73
Tensile Strength: Ultimate (UTS), MPa 620 to 2320
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
3.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.8
Embodied Energy, MJ/kg 24
24
Embodied Water, L/kg 46
59

Common Calculations

PREN (Pitting Resistance) 2.3
5.3
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 82
25 to 73
Strength to Weight: Bending, points 20 to 49
23 to 46
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 19 to 70
23 to 67

Alloy Composition

Carbon (C), % 1.0 to 1.3
1.0 to 1.1
Chromium (Cr), % 0
0.9 to 2.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.9 to 98
92 to 95.5
Manganese (Mn), % 0 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), % 1.0 to 1.8
0

Comparable Variants