SAE-AISI 5140 Steel vs. AWS BCo-1

SAE-AISI 5140 steel belongs to the iron alloys classification, while AWS BCo-1 belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is AWS BCo-1.

SAE-AISI 5140 (SCr440, G51400) Chromium Steel AWS BCo-1 (R39001) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.29
Poisson's Ratio		0.3

Shear Modulus, GPa		73
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		560 to 970
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		420

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1150

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1120

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

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

Otherwise Unclassified Properties

Density, g/cm³		7.8
Density, g/cm³		8.1

Embodied Carbon, kg CO₂/kg material		1.4
Embodied Carbon, kg CO₂/kg material		8.0

Embodied Energy, MJ/kg		19
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		49
Embodied Water, L/kg		430

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

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

Strength to Weight: Axial, points		20 to 34
Strength to Weight: Axial, points		24

Strength to Weight: Bending, points		19 to 28
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		16 to 29
Thermal Shock Resistance, points		21

Alloy Composition

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

Boron (B), %		0
Boron (B), %		0.7 to 0.9

Carbon (C), %		0.38 to 0.43
Carbon (C), %		0.35 to 0.45

Chromium (Cr), %		0.7 to 0.9
Chromium (Cr), %		18 to 20

Cobalt (Co), %		0
Cobalt (Co), %		46 to 54

Iron (Fe), %		97.3 to 98.1
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0.7 to 0.9
Manganese (Mn), %		0

Nickel (Ni), %		0
Nickel (Ni), %		16 to 18

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), %		7.5 to 8.5

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.020

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

Tungsten (W), %		0
Tungsten (W), %		3.5 to 4.5

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

Residuals, %		0
Residuals, %		0 to 0.5