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ACI-ASTM CN7M Steel vs. AWS E240

Both ACI-ASTM CN7M steel and AWS E240 are iron alloys. They have 68% of their average alloy composition in common. There are 23 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 ACI-ASTM CN7M steel and the bottom bar is AWS E240.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 480
770

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1410
1390
Melting Onset (Solidus), °C 1450
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 32
14
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 5.6
3.0
Embodied Energy, MJ/kg 78
42
Embodied Water, L/kg 210
160

Common Calculations

PREN (Pitting Resistance) 29
22
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
28
Strength to Weight: Bending, points 17
24
Thermal Diffusivity, mm2/s 5.6
3.9
Thermal Shock Resistance, points 12
19

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 19 to 22
17 to 19
Copper (Cu), % 3.0 to 4.0
0 to 0.75
Iron (Fe), % 37.4 to 48.5
58.6 to 68.4
Manganese (Mn), % 0 to 1.5
10.5 to 13.5
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.75
Nickel (Ni), % 27.5 to 30.5
4.0 to 6.0
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030