Formlabs Nylon 12 GF Powder

Glass-Filled SLS for High-Stiffness, Thermally Stable Parts

Formlabs Nylon 12 GF Powder is a glass-filled Nylon 12 SLS material designed for applications where structural rigidity, dimensional stability, and thermal resistance are critical.

By incorporating glass filler into the Nylon 12 material, Nylon 12 GF provides significantly greater stiffness than standard Nylon 12 while maintaining the dimensional accuracy and environmental stability expected from Formlabs SLS printing. The material is particularly well suited for high-performance functional prototypes, manufacturing aids, rapid tooling, fixtures, enclosures, and end-use parts.

With a 2.8 GPa tensile modulus, 2.4 GPa flexural modulus, and 113°C heat deflection temperature at 1.8 MPa, Nylon 12 GF is designed for parts that need to remain rigid under sustained mechanical and thermal loads.

Key Benefits

• High stiffness: 2.8 GPa tensile modulus provides substantially greater rigidity than standard Nylon 12.

• Thermal resistance: 113°C HDT at 1.8 MPa and 170°C at 0.45 MPa.

• Excellent dimensional accuracy: Designed for precise parts with low warpage.

• Stable under sustained loads: Ideal for rigid fixtures, tooling, and structural components.

• Glass-filled reinforcement: Provides increased stiffness and dimensional stability.

• Environmental stability: Low moisture absorption and resistance to light, heat, and chemicals.

• Biocompatible: Formlabs lists the material for skin-contact and mucosal-membrane-contact applications.

• 50% refresh rate: Designed to reuse a substantial portion of previously used powder.

• Production capable: Suitable for prototypes, manufacturing aids, tooling, and end-use parts.

Recommended Applications

High-Stiffness Prototypes
Create functional prototypes that need to maintain their shape and rigidity under mechanical loads.

Jigs & Fixtures
Produce robust production fixtures that need to remain dimensionally stable under sustained loading.

Rapid Tooling
Create durable tooling and manufacturing aids without the lead time and cost associated with traditional machining.

Replacement Parts
Manufacture rigid replacement components for industrial equipment, machinery, and other demanding applications.

Small-Batch Enclosures
Produce rigid housings and enclosures with high-tolerance threads, sockets, mounting features, and moving elements.

Automotive & Aerospace Components
Nylon 12 GF is well suited for applications where structural rigidity, thermal stability, and low weight are important.

High-Temperature Applications
Produce components that need to maintain dimensional stability when exposed to elevated temperatures.

Material Specifications

These values reflect Formlabs' published material properties. Actual performance can vary depending on part geometry, orientation, processing, and manufacturing conditions.

High Stiffness Without Metal

Nylon 12 GF is designed for applications where standard Nylon 12 does not provide enough rigidity.

The glass filler increases the material's stiffness, allowing designers to create parts that resist bending and deformation under sustained loads. This makes it particularly useful for fixtures, brackets, housings, tooling, and structural components.

Compared with standard Nylon 12, Nylon 12 GF has a tensile modulus of 2.8 GPa versus 1.85 GPa, providing approximately 50% greater tensile stiffness.

Thermal Stability

Nylon 12 GF is also designed for applications where elevated temperatures can cause conventional thermoplastics to deform.

Its 113°C heat deflection temperature at 1.8 MPa provides significantly greater thermal resistance than standard Nylon 12, which has an 87°C HDT at the same load.

At 0.45 MPa, Nylon 12 GF reaches a heat deflection temperature of 170°C.

This makes the material particularly useful for:

• High-temperature fixtures

• Automotive components

• Electrical enclosures

• EV-related components

• Industrial equipment

• Production tooling

• Components exposed to elevated operating temperatures

Dimensional Accuracy

Nylon 12 GF is rated by Formlabs as having best-in-class dimensional accuracy within its SLS powder lineup.

Its dimensional stability makes it particularly useful for parts that need to maintain precise interfaces, mounting locations, threads, sockets, and other critical features.

Glass-Filled Material Considerations

The addition of glass filler increases stiffness, but it also makes Nylon 12 GF more brittle than standard Nylon 12.

Thin features are therefore more susceptible to breaking, and designs that rely on significant flexing or repeated deformation may be better suited to a more ductile material such as Nylon 12 Tough or Nylon 11.

The glass-filled powder also produces a rougher surface finish than standard Nylon 12. Secondary finishing such as sanding, machining, or other post-processing may be required when a smooth cosmetic surface is important.

Powder Efficiency

50% Refresh Rate

Nylon 12 GF uses a recommended 50% refresh rate, meaning each new build normally uses approximately 50% fresh powder and 50% recycled powder.

This provides an efficient material workflow while maintaining reliable print performance. Under specific Formlabs guidance, a 70% refresh rate may be used to troubleshoot certain part defects.

Printer Compatibility

Nylon 12 GF Powder is compatible with:

• Formlabs Fuse 1

• Formlabs Fuse 1+ 30W

Formlabs recommends printing Nylon 12 GF in an air atmosphere, rather than using nitrogen.

Preparing to Print

Before the first Nylon 12 GF build, Formlabs recommends aging a batch of fresh powder to create the recycled powder needed for the standard 50% refresh workflow.

On the Fuse 1+ 30W, Formlabs also recommends bed-temperature tuning before the first print. This tuning process is performed using aged powder refreshed with 50% fresh material and can help reduce surface defects caused by temperature variation.

Post-Processing

Nylon 12 GF parts are post-processed using the Fuse Sift powder recovery station and media blasting.

Because of the glass-filled composition, designers should consider the desired surface finish when planning the part. Parts requiring a smooth cosmetic surface may benefit from additional sanding, machining, or other secondary finishing operations.

Nylon 12 GF vs. Standard Nylon 12

The key tradeoff is simple: Nylon 12 GF provides substantially greater stiffness and improved thermal performance, while standard Nylon 12 provides greater elongation and a more forgiving, ductile material.

Why Choose Nylon 12 GF Powder?

Choose Formlabs Nylon 12 GF Powder when your application demands rigidity, dimensional stability, and thermal resistance.

Its glass-filled formulation makes it particularly valuable for high-stiffness fixtures, tooling, replacement parts, equipment enclosures, automotive components, and other parts that need to remain stable under sustained mechanical or thermal loads.

For customers moving beyond basic prototyping, Nylon 12 GF provides a practical way to produce strong, rigid, production-ready SLS parts without the tooling requirements of traditional manufacturing.

If standard Nylon 12 is the all-around SLS workhorse, Nylon 12 GF is the choice when the job calls for more stiffness and thermal stability.