HP MJF PA12 Glass Filled is a glass bead filled nylon, 3D printed by HP Multi Jet Fusion (MJF), for parts that must stay stiff and hold their shape. It is about a third stiffer than standard HP PA12, warps little and holds tight tolerances, and it stays rigid under load at higher temperatures than unfilled nylon. Parts build without supports, so complex shapes and combined assemblies print in one piece. Choose it for housings and enclosures, fixtures and robot mount plates, brackets and covers for warm vehicle zones, and UAV brackets and avionics housings.
How HP MJF PA12 Glass Filled is manufactured
HP MJF PA12 Glass Filled is manufactured using HP Multi Jet Fusion (MJF), a powder-bed process with voxel-level thermal control that applies fusing and detailing agents at 1200 dpi for sharp edges and fine features. A balanced heating system with integrated cooling keeps tensile strength the same in every build direction, and thermal imaging monitors each layer so quality stays consistent across the entire build volume.
Upload CAD files to Forge Labs Steam for instant HP MJF PA12 Glass Filled pricing and live manufacturability feedback, and fix issues before production.
Upload CAD files to Forge Labs Steam for instant HP MJF PA12 Glass Filled pricing and live manufacturability feedback, and fix issues before production.
MJF parts have a smooth, matte surface with a slightly grainy texture due to the powder-based printing process. Unlike FDM, MJF does not produce visible layer lines, resulting in a more uniform and professional appearance straight from the printer. At Forge Labs, bead blasting is performed as a standard post-processing step to remove excess powder and refine the surface texture.
MJF parts are delivered with a standard bead-blasted finish in natural grey. This process removes excess powder and slightly smooths the surface while maintaining the material's natural matte texture.
Specialized dye bath creates deep, uniform black color that chemically bonds with the nylon material. Unlike painted finishes, the dye fully penetrates the surface and won't chip or wear off over time.
Advanced chemical smoothing technique that enhances surface quality by slightly melting and redistributing the surface material, eliminating grainy texture and sealing porous areas.
Automotive-grade coating that enhances aesthetics and durability. Hand-finished for smooth surfaces with professional-grade equipment. Custom color matching available for precise branding needs.
HP MJF PA12 Glass Filled pairs the stiffness of glass bead reinforcement with excellent dimensional stability and low warpage. From rapid prototyping to production runs, teams rely on it to maintain tight tolerances while reducing assembly complexity through consolidated part designs.
It brings Multi Jet Fusion's production advantages to structural parts, which come out about 1.3 to 1.4 times stiffer than standard HP PA12. Parts keep MJF's detail and dimensional accuracy, and the glass beads add the rigidity and repeatability that structural applications require.
Glass bead reinforcement transforms PA12's mechanical profile, so loaded brackets, covers and frames keep their shape in warm equipment enclosures.
MJF's support-free manufacturing enables complex internal structures and consolidated assemblies that would require multiple operations in traditional manufacturing. With no tooling or minimum order, the same file moves from the first prototype to production lots.
Industrial Design
Rigid housings and mechanisms that print with moving parts in place and fit as drawn.
Manufacturing & Robotics
Stiff fixtures, mount plates and covers that bend less under load, with pins and inserts installed.
Automotive
Stiff brackets and covers for warm vehicle zones, in a material entered in IMDS.
Aerospace
Stiff, topology-optimised brackets and avionics housings for UAS and aerospace programs.
Clean Tech & Electrical
Rigid insulating enclosures, connector housings and covers with UL glow-wire ratings.
Industrial Design
Product teams choose the glass bead grade for housings, frames and mechanisms that must stay rigid where standard PA12 would flex. Moving parts print together with clearances as tight as 0.5 mm, and heat-set inserts and post-machining give production-ready fastening, so pilot-run assemblies fit together as drawn.
Manufacturing & Robotics
Manufacturing and robotics teams use the glass bead grade for locating fixtures, robot mount plates and machine covers, because broad faces and mounting points bend less under the same load and keep parts located during assembly and test. Pins, bushings and threaded inserts install into the print, and a revised fixture goes into the next lot without retooling.
Automotive
Vehicle makers and suppliers use the glass bead grade for brackets, covers and air-handling housings that sit in warm zones of the vehicle. Under a 1.82 MPa load it deflects at 114 to 120 °C, higher than standard HP PA12, so stiff mounts keep their position near motors and blowers. No GADSL substances are intentionally added and the material is entered in IMDS, which simplifies supplier declarations.
Aerospace
UAS and aerospace teams use the glass bead grade for structural brackets, mounting hardware, avionics enclosures and UAV frame components where stiffness sets the design. Topology-optimised brackets with open lattice forms and integrated mounting points come straight from the model. At 1.3 g/cm³ the material is less than half the density of aluminium, which keeps weight down on lightly loaded brackets and housings.
Clean Tech & Electrical
Charger, converter and electrical equipment makers use the glass bead grade for enclosures, connector housings and covers, because rigid walls hold connectors and mounting features in position. It insulates at 10¹⁴ Ω·cm and holds UL glow-wire ratings of 650 to 725 °C, depending on thickness and orientation.
Values from the HP 3D High Reusability PA 12 Glass Beads datasheet and HP's UL certification, tested to the standard listed with each property.
Mechanical performance
HP MJF PA12 Glass Filled delivers dependable stiffness for structural brackets, housings, fixtures and mounting systems, helping teams move from prototype to production with confidence. Glass bead reinforcement raises modulus well above unfilled PA12, so parts resist bending and hold critical geometries under load.
HP reports X/Y and Z values separately: tensile strength and elongation are the same in both directions, and stiffness is slightly higher in Z. Impact strength is lower than unfilled PA12 and elongation is lower in the X/Y direction, so design for rigidity rather than flex and choose HP PA12 for living hinges and deep snap-fits.
Material makeup
Consistent density and surface quality keep critical features in tolerance and downstream finishing predictable. The glass beads make parts denser and harder at the surface than unfilled PA12, and parts come off the build platform ready to assemble without secondary rework.
Parts print in natural grey. Particle size and bulk density describe the powder each layer is built from, not the finished part. In HP's accelerated weathering test, 1,000 hours of xenon-arc exposure left the tensile modulus unchanged while tensile strength and elongation fell, so paint or coat parts that will spend their service life outdoors.
Heat performance
HP MJF PA12 Glass Filled maintains dimensional stability through temperature swings and repeated thermal cycling. Read heat deflection at both loads: at the lower load it matches unfilled PA12, while at the higher load the glass beads keep parts rigid to a higher temperature, the figure that matters for brackets and covers carrying load near heat sources.
The ball pressure result from UL shows the material keeps its shape under a heated indenter, which is how electrical standards judge parts that hold live components in place.
Functional performance
Volume resistivity places HP MJF PA12 Glass Filled in the insulating range, suited to enclosures, connector housings and insulating features. Dielectric strength depends on the print orientation, so specify the build direction on the drawing for thin insulating walls.
Compliance
HP holds a UL Blue Card for UL 94 HB at 0.75 mm and UL 746A short-term electrical properties, and a UL White Card for glow-wire and ball pressure, so electrical equipment reviews can start from supplier data.
HP tested printed parts for RoHS substances and PAHs, and states that no SVHC or GADSL substances are intentionally added. It is not flame retardant, and HP publishes no food-contact or biocompatibility approval for it.
Datasheets, design guidance and supplier documentation for HP MJF PA12 Glass Filled.
Access the most recent datasheet and supporting documentation maintained by our engineering team.
HP MJF PA12 Glass Filled datasheetExplore printable geometry recommendations, wall thickness tips, and finishing playbooks for MJF.
View MJF design guideSupplier declarations and test statements for this material.
HP MJF PA12 Glass Filled is manufactured using Multi Jet Fusion (MJF) technology, combining speed and consistency for production applications. HP's thermal inkjet process delivers a smooth surface finish and rapid cycle times from one batch to the next.
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