R05240 Alloy vs. SAE-AISI M44 Steel

R05240 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI M44 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 M44 steel.

UNS R05240 Tantalum-Niobium Alloy SAE-AISI M44 (T11344) Cobalt 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		870 to 2290

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		270

Specific Heat Capacity, J/kg-K		190
Specific Heat Capacity, J/kg-K		440

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

Otherwise Unclassified Properties

Density, g/cm³		14
Density, g/cm³		8.4

Embodied Water, L/kg		460
Embodied Water, L/kg		170

Common Calculations

Stiffness to Weight: Axial, points		6.3
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		5.4
Strength to Weight: Axial, points		28 to 75

Strength to Weight: Bending, points		6.8
Strength to Weight: Bending, points		24 to 46

Thermal Shock Resistance, points		18
Thermal Shock Resistance, points		27 to 70

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		1.1 to 1.2

Chromium (Cr), %		0
Chromium (Cr), %		4.0 to 4.8

Cobalt (Co), %		0
Cobalt (Co), %		11 to 12.3

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), %		65.3 to 70.6

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

Molybdenum (Mo), %		0 to 0.020
Molybdenum (Mo), %		6.0 to 7.0

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), %		0.3 to 0.55

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), %		5.0 to 5.8

Vanadium (V), %		0
Vanadium (V), %		1.9 to 2.2