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ACI-ASTM CH20 Steel vs. AWS ENiCrMo-4

ACI-ASTM CH20 steel belongs to the iron alloys classification, while AWS ENiCrMo-4 belongs to the nickel alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CH20 steel and the bottom bar is AWS ENiCrMo-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 38
28
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 610
790

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1410
1590
Melting Onset (Solidus), °C 1430
1530
Specific Heat Capacity, J/kg-K 480
410
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 20
70
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 3.7
13
Embodied Energy, MJ/kg 53
170
Embodied Water, L/kg 180
280

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 22
24
Strength to Weight: Bending, points 21
21
Thermal Shock Resistance, points 15
22

Alloy Composition


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Carbon (C), % 0 to 0.2
0 to 0.020
Chromium (Cr), % 22 to 26
14.5 to 16.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 54.7 to 66
4.0 to 7.0
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
15 to 17
Nickel (Ni), % 12 to 15
49.9 to 63.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 0.2
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
3.0 to 4.5
Vanadium (V), % 0
0 to 0.35
Residuals, % 0
0 to 0.5