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ACI-ASTM CN3MN Steel vs. SAE-AISI P20 Steel

Both ACI-ASTM CN3MN steel and SAE-AISI P20 steel are iron alloys. They have 49% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 620
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 310
260
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
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 33
2.8
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
1.6
Embodied Energy, MJ/kg 84
21
Embodied Water, L/kg 200
52

Common Calculations

PREN (Pitting Resistance) 46
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
19 to 37
Strength to Weight: Bending, points 20
19 to 29
Thermal Diffusivity, mm2/s 3.4
12
Thermal Shock Resistance, points 14
18 to 35

Alloy Composition

Carbon (C), % 0 to 0.030
0.28 to 0.4
Chromium (Cr), % 20 to 22
0.4 to 2.0
Copper (Cu), % 0 to 0.75
0 to 0.25
Iron (Fe), % 41.4 to 50.3
95.2 to 98.5
Manganese (Mn), % 0 to 2.0
0.35 to 0.71
Molybdenum (Mo), % 6.0 to 7.0
0.3 to 0.55
Nickel (Ni), % 23.5 to 25.5
0
Nitrogen (N), % 0.18 to 0.26
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.8
Sulfur (S), % 0 to 0.010
0 to 0.030