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ACI-ASTM CN3MN Steel vs. SAE-AISI 5140 Steel

Both ACI-ASTM CN3MN steel and SAE-AISI 5140 steel are iron alloys. They have 48% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN3MN steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170 to 290
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 39
12 to 29
Fatigue Strength, MPa 250
220 to 570
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 620
560 to 970
Tensile Strength: Yield (Proof), MPa 300
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 13
45
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 33
2.1
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
1.4
Embodied Energy, MJ/kg 84
19
Embodied Water, L/kg 200
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 210
220 to 1880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
20 to 34
Strength to Weight: Bending, points 20
19 to 28
Thermal Diffusivity, mm2/s 3.4
12
Thermal Shock Resistance, points 14
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 20 to 22
0.7 to 0.9
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 41.4 to 50.3
97.3 to 98.1
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 23.5 to 25.5
0
Nitrogen (N), % 0.18 to 0.26
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040