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AWS BNi-9 vs. ASTM A387 Grade 12 Steel

AWS BNi-9 belongs to the nickel alloys classification, while ASTM A387 grade 12 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-9 and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 580
470 to 520

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1060
1470
Melting Onset (Solidus), °C 1060
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
2.8
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 9.3
1.6
Embodied Energy, MJ/kg 130
21
Embodied Water, L/kg 260
51

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 19
16 to 18
Strength to Weight: Bending, points 18
17 to 18
Thermal Shock Resistance, points 19
14 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 3.3 to 4.0
0
Carbon (C), % 0 to 0.060
0.050 to 0.17
Chromium (Cr), % 13.5 to 16.5
0.8 to 1.2
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 1.5
97 to 98.2
Manganese (Mn), % 0
0.4 to 0.65
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 77.1 to 83.3
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0
0.15 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.025
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0