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Borosilicate Glass vs. Nickel 685

Borosilicate glass and nickel 685 belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while nickel 685 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. 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 nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
200
Poisson's Ratio 0.21
0.29
Tensile Strength: Ultimate (UTS), MPa 280
1250

Thermal Properties

Maximum Temperature: Mechanical, °C 360
1000
Melting Onset (Solidus), °C 560
1330
Specific Heat Capacity, J/kg-K 830
460
Thermal Conductivity, W/m-K 1.2
13
Thermal Expansion, µm/m-K 3.3 to 5.1
12

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
8.4

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
13
Stiffness to Weight: Bending, points 55 to 61
23
Strength to Weight: Axial, points 30 to 35
42
Strength to Weight: Bending, points 36 to 43
31
Thermal Diffusivity, mm2/s 0.54 to 0.63
3.3
Thermal Shock Resistance, points 50 to 91
37