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SAE-AISI A7 Steel vs. ACI-ASTM CD3MCuN Steel

Both SAE-AISI A7 steel and ACI-ASTM CD3MCuN steel are iron alloys. They have 70% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is ACI-ASTM CD3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
790

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 10
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 13
3.9
Embodied Energy, MJ/kg 200
54
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 11
41
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
28
Strength to Weight: Bending, points 25 to 48
24
Thermal Diffusivity, mm2/s 10
4.1
Thermal Shock Resistance, points 27 to 72
22

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.030
Chromium (Cr), % 5.0 to 5.8
24 to 26.7
Copper (Cu), % 0 to 0.25
1.4 to 1.9
Iron (Fe), % 81.4 to 87.7
58.2 to 65.9
Manganese (Mn), % 0 to 0.8
0 to 1.2
Molybdenum (Mo), % 0.9 to 1.4
2.9 to 3.8
Nickel (Ni), % 0 to 0.3
5.6 to 6.7
Nitrogen (N), % 0
0.22 to 0.33
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.1
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0