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SAE-AISI 4340M Steel vs. AWS E3155

Both SAE-AISI 4340M steel and AWS E3155 are iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (12, 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 E3155.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 6.0
23
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
81
Tensile Strength: Ultimate (UTS), MPa 2340
770

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 38
13
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 1.9
7.7
Embodied Energy, MJ/kg 26
110
Embodied Water, L/kg 55
300

Common Calculations

PREN (Pitting Resistance) 2.2
35
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 84
26
Strength to Weight: Bending, points 51
22
Thermal Diffusivity, mm2/s 10
3.3
Thermal Shock Resistance, points 70
20

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.7 to 1.0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 93.3 to 94.8
23.3 to 36.3
Manganese (Mn), % 0.65 to 0.9
1.0 to 2.5
Molybdenum (Mo), % 0.35 to 0.45
2.5 to 3.5
Nickel (Ni), % 1.7 to 2.0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
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
Tungsten (W), % 0
2.0 to 3.0
Vanadium (V), % 0.050 to 0.1
0