AWS E312 vs. Type 3 Niobium

AWS E312 belongs to the iron alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 15 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 AWS E312 and the bottom bar is Type 3 niobium.

AWS E312 (W31310) Weld Metal Type 3 (Alloyed Reactor Grade, R04251) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		25
Elongation at Break, %		23

Poisson's Ratio		0.27
Poisson's Ratio		0.4

Shear Modulus, GPa		80
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		740
Tensile Strength: Ultimate (UTS), MPa		220

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		310

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		7.7
Density, g/cm³		8.6

Embodied Water, L/kg		200
Embodied Water, L/kg		160

Common Calculations

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		27
Strength to Weight: Axial, points		7.2

Strength to Weight: Bending, points		24
Strength to Weight: Bending, points		9.5

Thermal Shock Resistance, points		18
Thermal Shock Resistance, points		21

Alloy Composition

Carbon (C), %		0 to 0.15
Carbon (C), %		0 to 0.010

Chromium (Cr), %		28 to 32
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.75
Copper (Cu), %		0

Hafnium (Hf), %		0
Hafnium (Hf), %		0 to 0.020

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

Iron (Fe), %		52.3 to 63.5
Iron (Fe), %		0 to 0.0050

Manganese (Mn), %		0.5 to 2.5
Manganese (Mn), %		0

Molybdenum (Mo), %		0 to 0.75
Molybdenum (Mo), %		0 to 0.010

Nickel (Ni), %		8.0 to 10.5
Nickel (Ni), %		0 to 0.0050

Niobium (Nb), %		0
Niobium (Nb), %		98.6 to 99.2

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.015

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.0050

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

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.1

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.020

Tungsten (W), %		0
Tungsten (W), %		0 to 0.030

Zirconium (Zr), %		0
Zirconium (Zr), %		0.8 to 1.2