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AWS BNi-7 vs. S17700 Stainless Steel

AWS BNi-7 belongs to the nickel alloys classification, while S17700 stainless steel belongs to the iron alloys. They have a modest 21% 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 (16, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-7 and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
200
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 67
76
Tensile Strength: Ultimate (UTS), MPa 550
1180 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 890
1440
Melting Onset (Solidus), °C 890
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 55
13
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 8.8
2.8
Embodied Energy, MJ/kg 120
40
Embodied Water, L/kg 240
150

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 19
42 to 59
Strength to Weight: Bending, points 19
32 to 40
Thermal Shock Resistance, points 21
39 to 54

Alloy Composition

Aluminum (Al), % 0 to 0.050
0.75 to 1.5
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.060
0 to 0.090
Chromium (Cr), % 13 to 15
16 to 18
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 0.2
70.5 to 76.8
Manganese (Mn), % 0 to 0.040
0 to 1.0
Nickel (Ni), % 73.3 to 77.3
6.5 to 7.8
Phosphorus (P), % 9.7 to 10.5
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0