High-Strength, High-Temperature Fiberglass




General Information

MarkForged's High-Strength, High-Temperature Fiberglass (HSHT) is a material uniquely designed for users who need strong parts for applications in higher temperature environments, over 105°C.

An example of parts that would need HSHT fiberglass are prototypes that are used in under-hood automotive applications. The exception would be in the engine component itself where the temperature reaches much higher than 140°C.

The following is useful information regarding printing with HSHT Fiberglass:

  • Printing with HSHT Fiberglass is approximately 50% slower than printing with Standard Fiberglass.
  • If printing with Nylon, is is normal for a slight yellowing of the printed Nylon to occur when printing with HSHT Fiberglass.

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Material Specifications

The following chart outlines the product specifications for HSHT as well as Standard Fiberglass:

Property Test Standard HSHT
Tensile Strength (MPa) Fiber: ASTM D3039 600 590
Tensile Modulus (GPa) Fiber: ASTM D30309 21 21
Tensile Strain at Break (%) Fiber: ASTM D3039 3.9 3.8
Flexural Strength (MPa) ASTM D790* 420 210
Flexural Modulus (GPa) ASTM D790* 21 22
Flexural Strain at Break (%) ASTM D790* 2.2 1.1
Compressive Strength (MPa) ASTM D6641 192 140
Compressive Modulus (GPa) ASTM D6641 21 21
Compressive Strain at Break (%) ASTM D6641 N/A N/A
Heat Deflection Temperature (°Celcius) ASTM D648
Method B
150 105
Density (g/cm^3) N/A 1.6 1.6

*Measured by a method similar to ASTM D790

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