R04295 Alloy vs. SAE-AISI A7 Steel

R04295 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI A7 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 R04295 alloy and the bottom bar is SAE-AISI A7 steel.

UNS R04295 Niobium-Hafnium Alloy SAE-AISI A7 (T30107) Air-Hardening Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.38
Poisson's Ratio		0.29

Shear Modulus, GPa		37
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		410
Tensile Strength: Ultimate (UTS), MPa		800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		260

Specific Heat Capacity, J/kg-K		260
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		7.2
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		7.7

Embodied Water, L/kg		950
Embodied Water, L/kg		100

Common Calculations

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

Stiffness to Weight: Bending, points		17
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		13
Strength to Weight: Axial, points		29 to 77

Strength to Weight: Bending, points		14
Strength to Weight: Bending, points		25 to 48

Thermal Shock Resistance, points		40
Thermal Shock Resistance, points		27 to 72

Alloy Composition

Carbon (C), %		0 to 0.015
Carbon (C), %		2.0 to 2.9

Chromium (Cr), %		0
Chromium (Cr), %		5.0 to 5.8

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

Hafnium (Hf), %		9.0 to 11
Hafnium (Hf), %		0

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

Iron (Fe), %		0
Iron (Fe), %		81.4 to 87.7

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.8

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0.9 to 1.4

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

Niobium (Nb), %		85.9 to 90.3
Niobium (Nb), %		0

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

Oxygen (O), %		0 to 0.025
Oxygen (O), %		0

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

Silicon (Si), %		0
Silicon (Si), %		0 to 0.5

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

Tantalum (Ta), %		0 to 0.5
Tantalum (Ta), %		0

Titanium (Ti), %		0.7 to 1.3
Titanium (Ti), %		0

Tungsten (W), %		0 to 0.5
Tungsten (W), %		0.5 to 1.5

Vanadium (V), %		0
Vanadium (V), %		3.9 to 5.2

Zirconium (Zr), %		0 to 0.7
Zirconium (Zr), %		0