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ACI-ASTM CH20 Steel vs. AWS BNi-7

ACI-ASTM CH20 steel belongs to the iron alloys classification, while AWS BNi-7 belongs to the nickel alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (14, 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 BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
170
Poisson's Ratio 0.27
0.3
Shear Modulus, GPa 78
67
Tensile Strength: Ultimate (UTS), MPa 610
550

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1410
890
Melting Onset (Solidus), °C 1430
890
Specific Heat Capacity, J/kg-K 480
490
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 20
55
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.7
8.8
Embodied Energy, MJ/kg 53
120
Embodied Water, L/kg 180
240

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 22
19
Strength to Weight: Bending, points 21
19
Thermal Shock Resistance, points 15
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0 to 0.010
Carbon (C), % 0 to 0.2
0 to 0.060
Chromium (Cr), % 22 to 26
13 to 15
Cobalt (Co), % 0
0 to 0.1
Iron (Fe), % 54.7 to 66
0 to 0.2
Manganese (Mn), % 0 to 1.5
0 to 0.040
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
73.3 to 77.3
Phosphorus (P), % 0 to 0.040
9.7 to 10.5
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 2.0
0 to 0.1
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5