K93500 Alloy vs. R05240 Alloy

K93500 alloy 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 (9, in this case) are not shown.

For each property being compared, the top bar is K93500 alloy and the bottom bar is R05240 alloy.

UNS K93500 Low Expansion Alloy UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		150

Poisson's Ratio		0.3
Poisson's Ratio		0.36

Shear Modulus, GPa		72
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		490 to 810
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		460
Specific Heat Capacity, J/kg-K		190

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

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		14

Embodied Water, L/kg		130
Embodied Water, L/kg		460

Common Calculations

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

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

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		17 to 23
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		15 to 25
Thermal Shock Resistance, points		18

Alloy Composition

Aluminum (Al), %		0 to 0.1
Aluminum (Al), %		0

Carbon (C), %		0 to 0.050
Carbon (C), %		0 to 0.010

Chromium (Cr), %		0 to 0.25
Chromium (Cr), %		0

Cobalt (Co), %		5.0
Cobalt (Co), %		0

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

Iron (Fe), %		61.4 to 63
Iron (Fe), %		0 to 0.010

Magnesium (Mg), %		0 to 0.1
Magnesium (Mg), %		0

Manganese (Mn), %		0 to 0.6
Manganese (Mn), %		0

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

Nickel (Ni), %		32
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 0.015
Phosphorus (P), %		0

Silicon (Si), %		0 to 0.25
Silicon (Si), %		0 to 0.0050

Sulfur (S), %		0 to 0.015
Sulfur (S), %		0

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

Titanium (Ti), %		0 to 0.1
Titanium (Ti), %		0 to 0.010

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

Zirconium (Zr), %		0 to 0.1
Zirconium (Zr), %		0