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ACI-ASTM CD6MN Steel vs. SAE-AISI 5140 Steel

Both ACI-ASTM CD6MN steel and SAE-AISI 5140 steel are iron alloys. They have 68% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD6MN steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
12 to 29
Fatigue Strength, MPa 370
220 to 570
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 730
560 to 970
Tensile Strength: Yield (Proof), MPa 510
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
1.4
Embodied Energy, MJ/kg 48
19
Embodied Water, L/kg 170
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 650
220 to 1880
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
20 to 34
Strength to Weight: Bending, points 23
19 to 28
Thermal Diffusivity, mm2/s 4.4
12
Thermal Shock Resistance, points 20
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.060
0.38 to 0.43
Chromium (Cr), % 24 to 27
0.7 to 0.9
Iron (Fe), % 62.1 to 70.1
97.3 to 98.1
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0.15 to 0.25
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 0.040
0 to 0.040