SAE-AISI 9255 Steel vs. R04295 Alloy

SAE-AISI 9255 steel belongs to the iron alloys classification, while R04295 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9255 steel and the bottom bar is R04295 alloy.

SAE-AISI 9255 (G92550) Silicon Steel UNS R04295 Niobium-Hafnium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		21
Elongation at Break, %		22

Poisson's Ratio		0.29
Poisson's Ratio		0.38

Shear Modulus, GPa		72
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		680
Tensile Strength: Ultimate (UTS), MPa		410

Tensile Strength: Yield (Proof), MPa		390
Tensile Strength: Yield (Proof), MPa		300

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		300

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		260

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		7.2

Otherwise Unclassified Properties

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

Embodied Water, L/kg		46
Embodied Water, L/kg		950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		120
Resilience: Ultimate (Unit Rupture Work), MJ/m³		84

Resilience: Unit (Modulus of Resilience), kJ/m³		400
Resilience: Unit (Modulus of Resilience), kJ/m³		430

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

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

Strength to Weight: Axial, points		24
Strength to Weight: Axial, points		13

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		14

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		40

Alloy Composition

Carbon (C), %		0.51 to 0.59
Carbon (C), %		0 to 0.015

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

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

Iron (Fe), %		96.2 to 97
Iron (Fe), %		0

Manganese (Mn), %		0.7 to 1.0
Manganese (Mn), %		0

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

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

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

Phosphorus (P), %		0 to 0.035
Phosphorus (P), %		0

Silicon (Si), %		1.8 to 2.2
Silicon (Si), %		0

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0

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

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

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

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