R05240 Alloy vs. SAE-AISI T8 Steel

R05240 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI T8 steel belongs to the iron alloys. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R05240 alloy and the bottom bar is SAE-AISI T8 steel.

UNS R05240 Tantalum-Niobium Alloy SAE-AISI T8 (T12008) Tungsten High-Speed Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		150
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.36
Poisson's Ratio		0.29

Shear Modulus, GPa		57
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		270
Tensile Strength: Ultimate (UTS), MPa		780 to 2140

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		250

Specific Heat Capacity, J/kg-K		190
Specific Heat Capacity, J/kg-K		420

Thermal Expansion, µm/m-K		6.8
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		14
Density, g/cm³		9.0

Embodied Water, L/kg		460
Embodied Water, L/kg		120

Common Calculations

Stiffness to Weight: Axial, points		6.3
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		5.4
Strength to Weight: Axial, points		24 to 66

Strength to Weight: Bending, points		6.8
Strength to Weight: Bending, points		21 to 41

Thermal Shock Resistance, points		18
Thermal Shock Resistance, points		24 to 66

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0.75 to 0.85

Chromium (Cr), %		0
Chromium (Cr), %		3.8 to 4.5

Cobalt (Co), %		0
Cobalt (Co), %		4.3 to 5.8

Copper (Cu), %		0
Copper (Cu), %		0 to 0.25

Hydrogen (H), %		0 to 0.0015
Hydrogen (H), %		0

Iron (Fe), %		0 to 0.010
Iron (Fe), %		69.3 to 75.4

Manganese (Mn), %		0
Manganese (Mn), %		0.2 to 0.4

Molybdenum (Mo), %		0 to 0.020
Molybdenum (Mo), %		0.4 to 1.0

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		0 to 0.3

Niobium (Nb), %		35 to 42
Niobium (Nb), %		0

Nitrogen (N), %		0 to 0.010
Nitrogen (N), %		0

Oxygen (O), %		0 to 0.020
Oxygen (O), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 0.0050
Silicon (Si), %		0.2 to 0.4

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

Tantalum (Ta), %		57.9 to 65
Tantalum (Ta), %		0

Titanium (Ti), %		0 to 0.010
Titanium (Ti), %		0

Tungsten (W), %		0 to 0.050
Tungsten (W), %		13.3 to 14.8

Vanadium (V), %		0
Vanadium (V), %		1.8 to 2.4