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SAE-AISI 4340M Steel vs. AWS E2594

Both SAE-AISI 4340M steel and AWS E2594 are iron alloys. They have 63% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is AWS E2594.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 6.0
17
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
81
Tensile Strength: Ultimate (UTS), MPa 2340
850

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
4.3
Embodied Energy, MJ/kg 26
60
Embodied Water, L/kg 55
190

Common Calculations

PREN (Pitting Resistance) 2.2
43
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
30
Strength to Weight: Bending, points 51
25
Thermal Diffusivity, mm2/s 10
4.3
Thermal Shock Resistance, points 70
21

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.040
Chromium (Cr), % 0.7 to 1.0
24 to 27
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 93.3 to 94.8
53.8 to 63.8
Manganese (Mn), % 0.65 to 0.9
0.5 to 2.0
Molybdenum (Mo), % 0.35 to 0.45
3.5 to 4.5
Nickel (Ni), % 1.7 to 2.0
8.0 to 10.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.012
0 to 0.040
Silicon (Si), % 1.5 to 1.8
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0