SAE-AISI M47 Steel vs. R05240 Alloy

SAE-AISI M47 steel belongs to the iron alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. 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 SAE-AISI M47 steel and the bottom bar is R05240 alloy.

SAE-AISI M47 (T11347) Molybdenum High-Speed Steel UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.36

Shear Modulus, GPa		77
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		810 to 2310
Tensile Strength: Ultimate (UTS), MPa		270

Thermal Properties

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

Specific Heat Capacity, J/kg-K		450
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.1
Density, g/cm³		14

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

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		13

Strength to Weight: Axial, points		28 to 79
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		24 to 48
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		27 to 77
Thermal Shock Resistance, points		18

Alloy Composition

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

Chromium (Cr), %		3.5 to 4.0
Chromium (Cr), %		0

Cobalt (Co), %		4.8 to 5.3
Cobalt (Co), %		0

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

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

Iron (Fe), %		78.7 to 85
Iron (Fe), %		0 to 0.010

Manganese (Mn), %		0.15 to 0.4
Manganese (Mn), %		0

Molybdenum (Mo), %		9.3 to 10
Molybdenum (Mo), %		0 to 0.020

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

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

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

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

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

Silicon (Si), %		0.2 to 0.45
Silicon (Si), %		0 to 0.0050

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

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

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

Tungsten (W), %		1.3 to 1.8
Tungsten (W), %		0 to 0.050

Vanadium (V), %		1.2 to 1.4
Vanadium (V), %		0