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AWS E209 vs. ACI-ASTM CN7MS Steel

Both AWS E209 and ACI-ASTM CN7MS steel are iron alloys. They have 83% of their average alloy composition in common. There are 21 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 AWS E209 and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
39
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 770
540

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 21
28
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.4
5.1
Embodied Energy, MJ/kg 63
71
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 33
28
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 24
19
Thermal Shock Resistance, points 19
13

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.070
Chromium (Cr), % 20.5 to 24
18 to 20
Copper (Cu), % 0 to 0.75
1.5 to 2.0
Iron (Fe), % 51.5 to 64.3
45.4 to 53.5
Manganese (Mn), % 4.0 to 7.0
0 to 1.0
Molybdenum (Mo), % 1.5 to 3.0
2.5 to 3.0
Nickel (Ni), % 9.5 to 12
22 to 25
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0