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AISI 321 Stainless Steel vs. AWS BNi-11

AISI 321 stainless steel belongs to the iron alloys classification, while AWS BNi-11 belongs to the nickel alloys. They have a modest 25% 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 (15, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is AWS BNi-11.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 590 to 690
600

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Melting Completion (Liquidus), °C 1430
1100
Melting Onset (Solidus), °C 1400
970
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 17
11

Otherwise Unclassified Properties

Base Metal Price, % relative 16
75
Density, g/cm3 7.8
9.1
Embodied Carbon, kg CO2/kg material 3.2
11
Embodied Energy, MJ/kg 45
160
Embodied Water, L/kg 140
230

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 21 to 25
18
Strength to Weight: Bending, points 20 to 22
17
Thermal Shock Resistance, points 13 to 15
20

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
2.2 to 3.1
Carbon (C), % 0 to 0.080
0.3 to 0.5
Chromium (Cr), % 17 to 19
9.0 to 11.8
Cobalt (Co), % 0
0 to 0.1
Iron (Fe), % 65.3 to 74
2.5 to 4.0
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 9.0 to 12
62.9 to 71.2
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.75
3.4 to 4.3
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0 to 0.7
0 to 0.050
Tungsten (W), % 0
11.5 to 12.8
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5