What's the strongest 3D printer filament?

In the realm of 3D printing, the strength of the final product is heavily influenced by the filament used. Among the strongest options is carbon fiber nylon (PA12 CF), a composite material known for its high tensile strength of 70 megapascals (MPa) or approximately 10,152 pounds per square inch (PSI). This material combines the durability of nylon with the lightweight and toughness of carbon fiber. However, its abrasive nature can cause wear on printers, and its stiffness makes it brittle, limiting its use in applications requiring impact resistance or flexibility.

Polycarbonate filament, with a tensile strength of around 67 MPa (9,800 PSI), is another strong contender. It offers high impact resistance and durability, maintaining its shape at temperatures up to 300 degrees Fahrenheit. This filament requires higher printing temperatures, necessitating printers capable of nozzle temperatures from 500 to 572 Fahrenheit and heated bed temperatures between 176 and 230 Fahrenheit. Polycarbonate's slight flexibility makes it less brittle than carbon fiber nylon, though it is limited in color options and is better suited for simple shapes rather than intricate designs.

Polycarbonate is ideal for practical parts such as hinges, components, molds, and housings. In contrast, carbon fiber nylon is suitable for modular parts like camera mounts and spool rollers. While other 3D printer filaments exist, none match the strength of carbon fiber or polycarbonate.

Strength in 3D printing filaments can refer to various attributes, such as resistance to physical pressure, impacts, or high temperatures. For flexibility, thermoplastic polyurethane (TPU) is preferred. TPU offers tensile strength between 20 and 100 MPa and is highly flexible, making it suitable for apparel, accessories, and small tools. It prints at lower temperatures and speeds, compatible with most printers.

Proper care and storage of filaments like carbon fiber nylon and TPU are crucial for successful 3D printing. Using high-quality sources and following best practices ensures optimal results.