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SAE-AISI A3 Steel vs. SAE-AISI 5140 Steel

Both SAE-AISI A3 steel and SAE-AISI 5140 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A3 steel and the bottom bar is SAE-AISI 5140 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 700 to 2150
560 to 970

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
45
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
1.4
Embodied Energy, MJ/kg 67
19
Embodied Water, L/kg 78
49

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 77
20 to 34
Strength to Weight: Bending, points 23 to 48
19 to 28
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 23 to 70
16 to 29

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.38 to 0.43
Chromium (Cr), % 4.8 to 5.5
0.7 to 0.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.7 to 92
97.3 to 98.1
Manganese (Mn), % 0.4 to 0.6
0.7 to 0.9
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.8 to 1.4
0

Comparable Variants