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ACI-ASTM CN7M Steel vs. AWS E320LR

Both ACI-ASTM CN7M steel and AWS E320LR are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 480
580

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1450
1360
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 15
14

Otherwise Unclassified Properties

Base Metal Price, % relative 32
36
Density, g/cm3 8.1
8.2
Embodied Carbon, kg CO2/kg material 5.6
6.2
Embodied Energy, MJ/kg 78
87
Embodied Water, L/kg 210
220

Common Calculations

PREN (Pitting Resistance) 29
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
20
Strength to Weight: Bending, points 17
19
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 19 to 22
19 to 21
Copper (Cu), % 3.0 to 4.0
3.0 to 4.0
Iron (Fe), % 37.4 to 48.5
32.7 to 42.5
Manganese (Mn), % 0 to 1.5
1.5 to 2.5
Molybdenum (Mo), % 2.0 to 3.0
2.0 to 3.0
Nickel (Ni), % 27.5 to 30.5
32 to 36
Niobium (Nb), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.5
0 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.015