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ACI-ASTM CD4MCuN Steel vs. SAE-AISI O7 Steel

Both ACI-ASTM CD4MCuN steel and SAE-AISI O7 steel are iron alloys. They have 65% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD4MCuN steel and the bottom bar is SAE-AISI O7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 770
680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1420
1480
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
41
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 18
6.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.5
2.3
Embodied Energy, MJ/kg 49
33
Embodied Water, L/kg 180
52

Common Calculations

PREN (Pitting Resistance) 35
3.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
24 to 74
Strength to Weight: Bending, points 24
22 to 46
Thermal Diffusivity, mm2/s 4.5
11
Thermal Shock Resistance, points 21
23 to 70

Alloy Composition

Carbon (C), % 0 to 0.040
1.1 to 1.3
Chromium (Cr), % 24.5 to 26.5
0.35 to 0.85
Copper (Cu), % 2.7 to 3.3
0 to 0.25
Iron (Fe), % 59.5 to 66.3
92.9 to 97.6
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.7 to 2.3
0 to 0.3
Nickel (Ni), % 4.7 to 6.0
0 to 0.3
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
1.0 to 2.0
Vanadium (V), % 0
0 to 0.4