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ACI-ASTM CE3MN Steel vs. SAE-AISI 4340M Steel

Both ACI-ASTM CE3MN steel and SAE-AISI 4340M steel are iron alloys. They have 66% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CE3MN steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 20
6.0
Fatigue Strength, MPa 380
690
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 770
2340
Tensile Strength: Yield (Proof), MPa 590
1240

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
38
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 21
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.2
1.9
Embodied Energy, MJ/kg 58
26
Embodied Water, L/kg 180
55

Common Calculations

PREN (Pitting Resistance) 43
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
120
Resilience: Unit (Modulus of Resilience), kJ/m3 840
4120
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
84
Strength to Weight: Bending, points 24
51
Thermal Diffusivity, mm2/s 4.1
10
Thermal Shock Resistance, points 21
70

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 24 to 26
0.7 to 1.0
Iron (Fe), % 58.1 to 65.9
93.3 to 94.8
Manganese (Mn), % 0 to 1.5
0.65 to 0.9
Molybdenum (Mo), % 4.0 to 5.0
0.35 to 0.45
Nickel (Ni), % 6.0 to 8.0
1.7 to 2.0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.012
Silicon (Si), % 0 to 1.0
1.5 to 1.8
Sulfur (S), % 0 to 0.040
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1