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Borosilicate Glass vs. Type 1 Magnetic Alloy

Borosilicate glass and Type 1 magnetic alloy belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while Type 1 magnetic alloy is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (30, 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 Type 1 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
190
Poisson's Ratio 0.21
0.3
Tensile Strength: Ultimate (UTS), MPa 280
500 to 830

Thermal Properties

Melting Onset (Solidus), °C 560
1370
Specific Heat Capacity, J/kg-K 830
460
Thermal Expansion, µm/m-K 3.3 to 5.1
12

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
8.3

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
12
Stiffness to Weight: Bending, points 55 to 61
23
Strength to Weight: Axial, points 30 to 35
17 to 28
Strength to Weight: Bending, points 36 to 43
17 to 24
Thermal Shock Resistance, points 50 to 91
16 to 26