AISI 309 Stainless Steel vs. AWS BNi-8

AISI 309 stainless steel belongs to the iron alloys classification, while AWS BNi-8 belongs to the nickel alloys. 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 AISI 309 stainless steel and the bottom bar is AWS BNi-8.

AISI 309 (S30900) Stainless Steel AWS BNi-8 (N99800) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.27
Poisson's Ratio		0.32

Shear Modulus, GPa		78
Shear Modulus, GPa		67

Tensile Strength: Ultimate (UTS), MPa		600 to 710
Tensile Strength: Ultimate (UTS), MPa		570

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		390

Melting Completion (Liquidus), °C		1450
Melting Completion (Liquidus), °C		1010

Melting Onset (Solidus), °C		1400
Melting Onset (Solidus), °C		980

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		19
Base Metal Price, % relative		46

Density, g/cm³		7.8
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		3.6
Embodied Carbon, kg CO₂/kg material		8.2

Embodied Energy, MJ/kg		51
Embodied Energy, MJ/kg		120

Embodied Water, L/kg		170
Embodied Water, L/kg		220

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		21 to 25
Strength to Weight: Axial, points		20

Strength to Weight: Bending, points		20 to 23
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		14 to 16
Thermal Shock Resistance, points		17

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.050

Carbon (C), %		0 to 0.2
Carbon (C), %		0 to 0.060

Chromium (Cr), %		22 to 24
Chromium (Cr), %		0

Cobalt (Co), %		0
Cobalt (Co), %		0 to 0.1

Copper (Cu), %		0
Copper (Cu), %		4.0 to 5.0

Iron (Fe), %		58 to 66
Iron (Fe), %		0

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		21.5 to 24.5

Nickel (Ni), %		12 to 15
Nickel (Ni), %		61.6 to 68.5

Phosphorus (P), %		0 to 0.045
Phosphorus (P), %		0 to 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		0 to 0.75
Silicon (Si), %		6.0 to 8.0

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.050

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5