Static protection built into the material
Electronics enclosures, sensor housings, and fixtures that sit close to circuit boards need to bleed off static before it reaches a component. PA 830-ESD 12 does that on its own.
It is a Nylon 11 filled with graphite, so the static dissipative property is part of the powder rather than a coating added after printing. We are currently evaluating it with EOS on our own electronics enclosures. This page covers what the material is, what the datasheet says, and what we have seen so far.
Why built-in ESD beats a coating
When a printed part needs ESD protection today, the usual answer is to print it in a standard nylon and spray on a static dissipative coating. That works on day one. The problem is what happens after.
With PA 830-ESD 12, the graphite is distributed through the material itself, so the property reaches every surface the laser builds and stays there.
| Sprayed ESD coating | PA 830-ESD 12 | |
|---|---|---|
| Durability | Wears down with handling, cleaning and abrasion, usually with no visible sign | Part of the material, so it does not wear away with use |
| Coverage | Shadows in ports, channels and internal ribs, leaving recesses thinner or uncovered | Runs through the whole part, including every internal feature |
| Process | One more operation to control, inspect and requalify on every part | Comes out of the printer ESD capable |
What is PA 830-ESD 12?
PA 830-ESD 12 is made by ALM (Advanced Laser Materials), an EOS company, for EOS selective laser sintering (SLS) systems. The base polymer is Nylon 11 (polyamide 11), graphite gives it its electrostatic dissipative (ESD) behaviour, and it contains no carbon fibers. Parts come out black with fine silver flakes in the surface.
ALM lists good tensile strength and toughness, easy machining, low abrasiveness and an excellent surface finish among its highlights. Its intended applications are assembly fixtures for the semiconductor industry, electronic products, and any part that needs ESD capability.
Typical properties
| Base polymer | Nylon 11, graphite filled |
| Colour | Black with silver flakes |
| Sintered density (ASTM D792) | 1.1 g/cc |
| Bulk density (ASTM D1895) | 0.49 g/cc |
| Tensile strength (ASTM D638) | 29 MPa (4,200 psi) |
| Tensile modulus, XY (ASTM D638) | 2,944 MPa (427,000 psi) |
| Elongation at break, XY (ASTM D638) | 8% |
| Melt viscosity, virgin (ASTM D1238) | 25 g/10 min |
| Particle size D10 to D90 (D50) | 31 to 95 µm (55 µm) |
| Surface resistivity, top (ASTM D257) | 2.4 × 103 Ω/sq |
| Surface resistivity, bottom (ASTM D257) | 3.3 × 104 Ω/sq |
Source: ALM PA 830-ESD 12 datasheet. Reference values only, they vary with part geometry and process parameters.
Where the surface resistivity lands
The datasheet values sit right around the boundary between the conductive and dissipative ranges, lower than carbon fiber filled nylons, which land closer to the insulative side. Which end you want depends on the specification your part has to meet, so check the target range in your ESD control program before choosing a material.
Two details matter for qualification. Resistivity varies with build orientation, and the top facing surface measures lower than the bottom facing surface. Post processing can shift it too: in EOS testing, vapor smoothing raised surface resistivity on every sample, though by varying amounts. Qualify the part in its final, finished condition, measured on the surface that matters.
PA 830-ESD 12: 2.4 × 103 (top facing) to 3.3 × 104 Ω/sq (bottom facing)
Surface resistivity ranges as commonly used in ESD control programs. Material values from the ALM datasheet.
The applications we are testing
For IMTS 2026, we shared two of our existing electronics enclosures with EOS for printing in PA 830-ESD 12. Both are PCB housings, and both are the kind of part where additive manufacturing pays off: the number and position of ports can change between versions without retooling.
PCB enclosure
RIM card enclosure
Houses the interface board for our Robotic Interface Module (RIM). Cable routing and strain relief are printed into the base, and the lid carries heat set threaded inserts.
Sensor I/O
I/O block for vacuum sensors
Built around a connector board with three ports and a single cable gland. The housing is shaped to the board, so a version with a different port count is a file change rather than a new mold.
As-printed (left) and vapor smoothed (right) PA 830-ESD 12.
As-printed or vapor smoothed?
We vapor smooth almost every part we ship, so we tested both finishes. The vapor smoothed parts came out with the sealed, wipe down surface we expect from our vapor smoothing process. The as-printed surface was a pleasant surprise, because its texture helps hide the stepping that usually shows on shallow angles in SLS parts.
Because smoothing can raise resistivity, the finish on an ESD part is a design decision and not just a cosmetic one. Settle it before the part is qualified.
PA 830-ESD 12 vs carbon fiber nylon vs PA12
Carbon fiber filled nylons have been the usual route to ESD safe SLS parts. PA 830-ESD 12 offers a different balance, and EOS notes a cost advantage as well: each build needs about 60% new powder, compared with 80 to 100% for carbon fiber materials.
| PA 830-ESD 12 | Carbon fiber nylon | PA12 (PA2200) | |
|---|---|---|---|
| ESD behaviour | Conductive end of the dissipative range | Insulative end of the dissipative range | Insulative, not ESD safe |
| Filler | Graphite | Carbon fiber | None |
| Stiffness | Moderate, good toughness | Highest | Moderate, ductile |
| Machining | Easy, low abrasion | More abrasive | Easy |
| Best for | Enclosures and fixtures near electronics | Stiff, lightweight structural parts | General tooling and end use parts |
If your part needs the stiffness of carbon fiber, a carbon fiber nylon is still the better choice. If it needs ESD protection, good toughness and a clean finish without the abrasiveness of fiber, PA 830-ESD 12 is worth a look. For tooling with no ESD requirement, PA12 nylon remains our default, and our guide to choosing SLS materials covers the rest of the portfolio.
Is PA 830-ESD 12 right for your part?
It is a strong candidate for PCB and sensor enclosures, cable management parts that run near electronics, fixtures and nests for semiconductor and electronics assembly, and robot tooling that handles or sits beside static sensitive components. It is not the stiffest option in the SLS portfolio, and like any ESD material it needs to be checked against your own resistivity target.
We are still evaluating PA 830-ESD 12 as an addition to our portfolio. Send us the part file and your resistivity target, and our team will tell you whether this material fits and how to qualify it.
Frequently asked questions
Is PA 830-ESD 12 conductive or dissipative?
It is sold as an electrostatic dissipative material. The datasheet lists surface resistivity of 2.4 × 103 Ω/sq on the top facing surface and 3.3 × 104 Ω/sq on the bottom facing surface, which sits around the boundary between the conductive and dissipative ranges. Always compare these values with the range your specification requires.
Does PA 830-ESD 12 contain carbon fiber?
No. Its ESD behaviour comes from graphite, and the base polymer is Nylon 11.
Is the ESD property permanent?
Yes. The graphite is part of the material, so the property runs through the whole part and does not wear off the way a sprayed coating does.
Can PA 830-ESD 12 parts be vapor smoothed?
Yes, and they finish well. In EOS testing, smoothing raised surface resistivity, so ESD parts should be qualified in their final finished condition.
Request a quote
Send us the part file, the resistivity range you need, and how the part will be finished, and our team will tell you whether PA 830-ESD 12 fits and what qualification should look like.
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