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Borosilicate Glass vs. AWS ERTi-2

Borosilicate glass and AWS ERTi-2 belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while AWS ERTi-2 is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (27, 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 borosilicate glass and the bottom bar is AWS ERTi-2.

Borosilicate GlassAWS ERTi-2 Weld Metal
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
110
Poisson's Ratio 0.21
0.32
Tensile Strength: Ultimate (UTS), MPa 280
340

Thermal Properties

Maximum Temperature: Mechanical, °C 360
320
Melting Onset (Solidus), °C 560
1620
Specific Heat Capacity, J/kg-K 830
540
Thermal Conductivity, W/m-K 1.2
21
Thermal Expansion, µm/m-K 3.3 to 5.1
8.7

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
4.5

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
13
Stiffness to Weight: Bending, points 55 to 61
35
Strength to Weight: Axial, points 30 to 35
21
Strength to Weight: Bending, points 36 to 43
24
Thermal Diffusivity, mm2/s 0.54 to 0.63
8.7
Thermal Shock Resistance, points 50 to 91
27