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Class 4 Tungsten vs. AWS E307

Class 4 tungsten belongs to the otherwise unclassified metals classification, while AWS E307 belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is class 4 tungsten and the bottom bar is AWS E307.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
200
Elongation at Break, % 2.3
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 110
78
Tensile Strength: Ultimate (UTS), MPa 790
660

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Specific Heat Capacity, J/kg-K 130
480
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 4.5
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
2.4

Otherwise Unclassified Properties

Density, g/cm3 16
7.8
Embodied Carbon, kg CO2/kg material 24
3.5
Embodied Energy, MJ/kg 360
49
Embodied Water, L/kg 150
160

Common Calculations

Stiffness to Weight: Axial, points 9.6
14
Stiffness to Weight: Bending, points 14
25
Strength to Weight: Axial, points 14
24
Strength to Weight: Bending, points 12
22
Thermal Diffusivity, mm2/s 15
4.1
Thermal Shock Resistance, points 46
17

Alloy Composition

Carbon (C), % 0
0.040 to 0.14
Chromium (Cr), % 0
18 to 21.5
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0
59.6 to 69.2
Manganese (Mn), % 0
3.3 to 4.8
Molybdenum (Mo), % 0
0.5 to 1.5
Nickel (Ni), % 0
9.0 to 10.7
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 97
0
Residuals, % 3.0
0