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AWS BNi-1 vs. ASTM Grade HI Steel

AWS BNi-1 belongs to the nickel alloys classification, while ASTM grade HI steel belongs to the iron alloys. They have a modest 36% 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 AWS BNi-1 and the bottom bar is ASTM grade HI steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 70
79
Tensile Strength: Ultimate (UTS), MPa 450
550

Thermal Properties

Latent Heat of Fusion, J/g 360
310
Melting Completion (Liquidus), °C 1040
1400
Melting Onset (Solidus), °C 980
1350
Specific Heat Capacity, J/kg-K 500
490
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 55
23
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 8.8
4.1
Embodied Energy, MJ/kg 120
59
Embodied Water, L/kg 240
200

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16
20
Strength to Weight: Bending, points 16
19
Thermal Shock Resistance, points 15
12

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 2.8 to 3.5
0
Carbon (C), % 0.6 to 0.9
0.2 to 0.5
Chromium (Cr), % 13 to 15
26 to 30
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 4.0 to 5.0
46.9 to 59.8
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 69.8 to 75.7
14 to 18
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 4.0 to 5.0
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