SAE-AISI 5155 Steel vs. AWS BNi-8

SAE-AISI 5155 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 (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5155 steel and the bottom bar is AWS BNi-8.

SAE-AISI 5155 (G51550) Chromium Steel AWS BNi-8 (N99800) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.29
Poisson's Ratio		0.32

Shear Modulus, GPa		73
Shear Modulus, GPa		67

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		570

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		390

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

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		980

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		2.1
Base Metal Price, % relative		46

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

Embodied Carbon, kg CO₂/kg material		1.4
Embodied Carbon, kg CO₂/kg material		8.2

Embodied Energy, MJ/kg		19
Embodied Energy, MJ/kg		120

Embodied Water, L/kg		49
Embodied Water, L/kg		220

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		12

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		20

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		20
Thermal Shock Resistance, points		17

Alloy Composition

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

Carbon (C), %		0.51 to 0.59
Carbon (C), %		0 to 0.060

Chromium (Cr), %		0.7 to 0.9
Chromium (Cr), %		0

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

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

Iron (Fe), %		97.2 to 97.9
Iron (Fe), %		0

Manganese (Mn), %		0.7 to 0.9
Manganese (Mn), %		21.5 to 24.5

Nickel (Ni), %		0
Nickel (Ni), %		61.6 to 68.5

Phosphorus (P), %		0 to 0.035
Phosphorus (P), %		0 to 0.020

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

Silicon (Si), %		0.15 to 0.35
Silicon (Si), %		6.0 to 8.0

Sulfur (S), %		0 to 0.040
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