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Grade N7M Nickel vs. AWS BNi-1a

Both grade N7M nickel and AWS BNi-1a are nickel alloys. They have 68% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade N7M nickel and the bottom bar is AWS BNi-1a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
180
Poisson's Ratio 0.31
0.3
Shear Modulus, GPa 85
70
Tensile Strength: Ultimate (UTS), MPa 590
450

Thermal Properties

Latent Heat of Fusion, J/g 320
370
Melting Completion (Liquidus), °C 1650
1080
Melting Onset (Solidus), °C 1590
980
Specific Heat Capacity, J/kg-K 390
500
Thermal Expansion, µm/m-K 9.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
55
Density, g/cm3 9.3
8.0
Embodied Carbon, kg CO2/kg material 16
8.8
Embodied Energy, MJ/kg 200
120
Embodied Water, L/kg 270
240

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 18
16
Strength to Weight: Bending, points 17
16
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
2.8 to 3.5
Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 0 to 1.0
13 to 15
Cobalt (Co), % 0
0 to 0.1
Iron (Fe), % 0 to 3.0
4.0 to 5.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 30 to 33
0
Nickel (Ni), % 60.9 to 70
70.6 to 76.3
Phosphorus (P), % 0 to 0.040
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 1.0
4.0 to 5.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5