At what point does carbon fiber melt?

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Best answer yet. The epoxies and resin will melt or fail before the actual carbon fiber does.

Hmm - someone should test how long a PRI carbon fiber free float tube will last under extreme conditions.

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Another engineer weighs in: I design and sell repair solutions for heavy industry, primarily utilizing composites like carbon fiber. The carbon fiber material can withstand remarkably high temperatures, but the weak point lies in the epoxies.

Ambient-cured epoxies typically begin to decompose at temperatures around 180-200°F. However, we offer one ambient cure that can withstand up to 300°F, and heat-cured epoxies that can endure temperatures as high as 500°F. As the temperature ratings increase, handling, installation, and curing of the epoxies become more complex.

It is common to observe discoloration in the epoxies once the temperature exceeds their glass transition temperature (Tg). This discoloration indicates a loss of integrity in the material.

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