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SAE-AISI S7 Steel vs. ACI-ASTM CN3M Steel

Both SAE-AISI S7 steel and ACI-ASTM CN3M steel are iron alloys. They have 53% 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 SAE-AISI S7 steel and the bottom bar is ACI-ASTM CN3M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
80
Tensile Strength: Ultimate (UTS), MPa 670 to 2030
500

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
13
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
31
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.3
5.9
Embodied Energy, MJ/kg 31
80
Embodied Water, L/kg 65
200

Common Calculations

PREN (Pitting Resistance) 8.4
38
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 72
17
Strength to Weight: Bending, points 22 to 46
17
Thermal Diffusivity, mm2/s 11
3.4
Thermal Shock Resistance, points 22 to 66
11

Alloy Composition

Carbon (C), % 0.45 to 0.55
0 to 0.030
Chromium (Cr), % 3.0 to 3.5
20 to 22
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 91.6 to 94.9
42.4 to 52.5
Manganese (Mn), % 0.2 to 0.9
0 to 2.0
Molybdenum (Mo), % 1.3 to 1.8
4.5 to 5.5
Nickel (Ni), % 0
23 to 27
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0 to 0.3
0