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SAE-AISI 4340M Steel vs. AWS E312

Both SAE-AISI 4340M steel and AWS E312 are iron alloys. They have 62% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (14, 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 E312.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
25
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 2340
740

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
20
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
3.6
Embodied Energy, MJ/kg 26
52
Embodied Water, L/kg 55
200

Common Calculations

PREN (Pitting Resistance) 2.2
31
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
27
Strength to Weight: Bending, points 51
24
Thermal Shock Resistance, points 70
18

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.15
Chromium (Cr), % 0.7 to 1.0
28 to 32
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 93.3 to 94.8
52.3 to 63.5
Manganese (Mn), % 0.65 to 0.9
0.5 to 2.5
Molybdenum (Mo), % 0.35 to 0.45
0 to 0.75
Nickel (Ni), % 1.7 to 2.0
8.0 to 10.5
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