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AWS BNi-4 vs. ACI-ASTM CH20 Steel

AWS BNi-4 belongs to the nickel alloys classification, while ACI-ASTM CH20 steel belongs to the iron alloys. 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 AWS BNi-4 and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Poisson's Ratio 0.31
0.27
Shear Modulus, GPa 67
78
Tensile Strength: Ultimate (UTS), MPa 430
610

Thermal Properties

Latent Heat of Fusion, J/g 340
310
Melting Completion (Liquidus), °C 1070
1410
Melting Onset (Solidus), °C 980
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Base Metal Price, % relative 60
20
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 10
3.7
Embodied Energy, MJ/kg 140
53
Embodied Water, L/kg 220
180

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 14
22
Strength to Weight: Bending, points 15
21
Thermal Shock Resistance, points 16
15

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 1.5 to 2.2
0
Carbon (C), % 0 to 0.060
0 to 0.2
Chromium (Cr), % 0
22 to 26
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 1.5
54.7 to 66
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 91.4 to 95.5
12 to 15
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0