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SAE-AISI 4340M Steel vs. AWS E307

Both SAE-AISI 4340M steel and AWS E307 are iron alloys. They have 69% 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 E307.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
78
Tensile Strength: Ultimate (UTS), MPa 2340
660

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
3.5
Embodied Energy, MJ/kg 26
49
Embodied Water, L/kg 55
160

Common Calculations

PREN (Pitting Resistance) 2.2
23
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
24
Strength to Weight: Bending, points 51
22
Thermal Diffusivity, mm2/s 10
4.1
Thermal Shock Resistance, points 70
17

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.040 to 0.14
Chromium (Cr), % 0.7 to 1.0
18 to 21.5
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 93.3 to 94.8
59.6 to 69.2
Manganese (Mn), % 0.65 to 0.9
3.3 to 4.8
Molybdenum (Mo), % 0.35 to 0.45
0.5 to 1.5
Nickel (Ni), % 1.7 to 2.0
9.0 to 10.7
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