ACI-ASTM CB30 Steel vs. R04295 Alloy

ACI-ASTM CB30 steel belongs to the iron alloys classification, while R04295 alloy belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CB30 steel and the bottom bar is R04295 alloy.

ACI-ASTM CB30 (J91803) Cast Stainless Steel UNS R04295 Niobium-Hafnium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		100

Poisson's Ratio		0.28
Poisson's Ratio		0.38

Shear Modulus, GPa		77
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		500
Tensile Strength: Ultimate (UTS), MPa		410

Tensile Strength: Yield (Proof), MPa		230
Tensile Strength: Yield (Proof), MPa		300

Thermal Properties

Latent Heat of Fusion, J/g		290
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		11
Thermal Expansion, µm/m-K		7.2

Otherwise Unclassified Properties

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

Embodied Water, L/kg		130
Embodied Water, L/kg		950

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		140
Resilience: Unit (Modulus of Resilience), kJ/m³		430

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

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

Strength to Weight: Axial, points		18
Strength to Weight: Axial, points		13

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		14

Thermal Shock Resistance, points		17
Thermal Shock Resistance, points		40

Alloy Composition

Carbon (C), %		0 to 0.3
Carbon (C), %		0 to 0.015

Chromium (Cr), %		18 to 21
Chromium (Cr), %		0

Copper (Cu), %		0 to 1.2
Copper (Cu), %		0

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

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

Iron (Fe), %		72.9 to 82
Iron (Fe), %		0

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

Nickel (Ni), %		0 to 2.0
Nickel (Ni), %		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 0.040
Phosphorus (P), %		0

Silicon (Si), %		0 to 1.5
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