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Borosilicate Glass vs. 7049A Aluminum

Borosilicate glass and 7049A aluminum belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while 7049A aluminum 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 (28, in this case) are not shown.

For each property being compared, the top bar is borosilicate glass and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
71
Poisson's Ratio 0.21
0.32
Tensile Strength: Ultimate (UTS), MPa 280
580 to 590

Thermal Properties

Maximum Temperature: Mechanical, °C 360
200
Melting Onset (Solidus), °C 560
430
Specific Heat Capacity, J/kg-K 830
850
Thermal Conductivity, W/m-K 1.2
130
Thermal Expansion, µm/m-K 3.3 to 5.1
24

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
3.1

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
13
Stiffness to Weight: Bending, points 55 to 61
44
Strength to Weight: Axial, points 30 to 35
52 to 53
Strength to Weight: Bending, points 36 to 43
50 to 51
Thermal Diffusivity, mm2/s 0.54 to 0.63
50
Thermal Shock Resistance, points 50 to 91
25