| HS Code | 817011 |
| Density Laser Sintered | 0.93 g/cm³ |
| Tensile Modulus | 1700 MPa |
| Tensile Strength | 48 MPa |
| Elongation At Break | 18% |
| Flexural Modulus | 1500 MPa |
| Charpy Impact Notched | 4.5 kJ/m² |
| Charpy Impact Unnotched | 50 kJ/m² |
| Shore D Hardness | 75 |
| Melting Temperature | 172-180 °C |
| Particle Size Average | 56 µm |
| Bulk Density Powder | 0.43-0.50 g/cm³ |
| Water Absorption | 0.9% (24h) |
As an accredited EOS PA 2201 Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EOS PA 2201 Nylon 12 powder is supplied in a sealed, moisture-proof cardboard box containing 10 kg, ready for 3D printing. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with palletized EOS PA 2201 Nylon 12 powder, secured, sealed, and ventilated to prevent moisture damage. |
| Shipping | EOS PA 2201 Nylon 12 ships as non-hazardous polymer powder in sealed, moisture-proof containers. Keep dry, away from ignition sources, and avoid static buildup. Transport at ambient temperature in standard packaging; protect from impact and humidity. No special hazardous-materials documentation is required for standard ground or air freight. |
| Storage | Store EOS PA 2201 Nylon 12 powder in its original, tightly sealed container in a cool, dry environment below 40°C. Protect from moisture, direct sunlight, and heat sources. After use, reseal immediately, preferably with desiccant. Proper storage ensures optimal flow, processing performance, and material properties for laser sintering. |
| Shelf Life | Shelf life is 12 months when stored unopened, dry, and at room temperature in its original sealed container. |
In automotive underhood fluid handling, PA 2201 powder is processed on CO₂ laser sintering systems with layer thickness set between 0.10 mm and 0.12 mm; the build chamber is held in the 168–174°C range under nitrogen with oxygen concentration maintained below 5.5% to limit oxidative yellowing. The polyamide 12 backbone provides tensile strength of 48 MPa and tensile modulus of 1650 MPa when tested per DIN EN ISO 527-2, while the low saturated moisture uptake of PA12—typically 0.6–0.8% at 23°C/50% RH—is decisive in tight-tolerance brake vacuum line connectors and fuel tank vent valve retaining clips, where dimensional change versus PA6 grades would exceed the acceptable clearance. A minimum wall thickness of 1.0 mm is maintained for pressure-containing sections, and a fresh powder fraction of at least 40–50% is used for leak-tight parts because recycled powder with elevated fines content produces higher porosity and lower interlayer fusion. Batch acceptance includes tensile testing per DIN EN ISO 527-2 on XY-oriented specimens and density measurement per ISO 1183-1 with a target of 0.93 g/cm3. Terminal products include auxiliary coolant port housings, EV battery cooling line brackets, and low-volume fuel vapor purge valve covers.
When a manufacturing cell replaces machined acetal fixtures with laser-sintered PA 2201, the economic threshold is not driven by raw material price but by the elimination of CAM programming and chip evacuation on complex vacuum channels. The tooling insert is built with contoured internal channels at 1.5 mm diameter, using a 60 W CO₂ laser and a layer thickness of 0.12 mm; unsintered powder is removed through ports designed into the CAD model to avoid secondary drilling. PA 2201 powder blends for tooling typically tolerate a 50% virgin / 50% once-used mixture when dimensional tolerance is not tighter than ±0.3%, because the recycled fraction reduces melt flow under ISO 1133-1 and may increase porosity. For EOAT gripping fingers on automated transfer lines, Shore D hardness of 75 per ISO 868 limits indentation damage to aluminum pressed surfaces, while non-abrasive contact preserves part finish. Terminal products—assembly jigs, CMM holding fixtures, and pick-and-place end effectors—are often coated with a polyurethane sealant when oil mist exposure exceeds 72 h per week. The powder is supplied with REACH and RoHS declarations for general industrial use; verification against the latest SVHC candidate list remains a site-level requirement.
Directly after depowdering, consumer drone airframe components printed from PA 2201 exhibit a dry tensile elongation at break of 18% per DIN EN ISO 527-2, which allows snap-fit assembly of motor housings without helical inserts. The unfilled PA12 grade is preferred over glass-bead-filled grades in this segment because the lower modulus of 1650 MPa reduces crack propagation during ground impact; however, build orientation must be controlled because z-axis tensile strength in unfilled SLS PA12 is commonly 20–30% lower than XY-oriented specimens under the same standard. A 50% fresh powder fraction is maintained for impact-critical airframe parts, while recycled powder is reserved for non-impact brackets and internal cable clips. Wall thickness for camera gimbal brackets is limited to 0.8 mm minimum in the XY plane; bosses for threaded inserts require a minimum diameter of 2.0 mm and are post-heat-set. UV exposure is managed with a clear acrylic or polyurethane coating because unfilled PA12 without carbon black is prone to surface chalking; published data for this specific grade under long-term QUV aging is limited, so validation per ASTM G154 on coated specimens is required before outdoor deployment. Terminal products include aerial photography gimbal brackets, LiDAR sensor mounts, and FPV drone arm clamps.
| Application zone | Layer thickness | Fresh powder fraction | Primary standards | Process boundary |
|---|---|---|---|---|
| Automotive fluid connectors | 0.12 mm | 40–50% | DIN EN ISO 527-2; ISO 1183-1 | Leak-tight walls ≥1.0 mm; chamber O₂ < 5.5% |
| Industrial tooling | 0.12 mm | 50% | ISO 868; ISO 1133-1 | Dimension tolerance not tighter than ±0.3% |
| Drone airframe | 0.10 mm | 50% | DIN EN ISO 527-2; ASTM G154 | Z-axis tensile strength drop 20–30% |
| Skin-contact orthoses | 0.10 mm | ≤50% recovered | ISO 10993-5; ISO 10993-10 | Batch-level cytotoxicity and sensitization required |
| Subsea cable clamps | 0.12 mm | 50% | ISO 175 | Polar fluid immersion verification required |
Patient-specific orthoses produced in hospital additive manufacturing hubs require a different acceptance chain than automotive parts. PA 2201 parts for skin-contact orthotic shells are typically built at 0.10 mm layer thickness to minimise staircase effect on the shell inner surface, then wet-tumbled with ceramic media until surface pores are closed before a vapour-smoothing step; surface roughness after post-processing is relevant because bacterial retention on untreated SLS surfaces has been documented in orthotic and dental device literature. The powder supplier’s certificate for PA 2201 must be checked for cytotoxicological endpoints under ISO 10993-5 and sensitisation under ISO 10993-10 when the device contacts intact skin for prolonged periods; published data for this specific powder grade in final orthotic devices is limited, so batch-level testing under the intended clinical use remains the responsibility of the medical device manufacturer. No more than 50% recovered powder is used in orthotic builds unless the blend passes melt flow and particle size distribution checks per the powder supplier’s internal procedure. Terminal products are ankle-foot orthosis shells, helmet liner inserts, and trial prosthetic sockets used for fitting before a carbon-fiber definitive device.
Although PA 2201 has lower continuous service temperature than glass-filled PA12, its strain-at-break and resistance to aliphatic hydrocarbons make it a candidate for protective clamp bodies in non-pressure service on ROV tooling and subsea cable routing. The material is not qualified for sour gas or pressure-retaining components; compatibility with methanol, corrosion inhibitors, and ester-based hydraulic fluids must be evaluated under ISO 175 immersion protocols before deployment, because PA12 stress cracking resistance varies with temperature and additive package. For subsea cable saddle clamps, a 50% fresh powder fraction is specified to maintain the highest lot-to-lot ductility, and build orientation places the clamp’s flexural load path in the XY plane to avoid the z-axis strength penalty. Terminal products are corrosion-retrofit cable separators, ROV sensor guard housings, and seabed template connector covers; these parts are post-sealed with a two-component polyurethane coating when water absorption beyond 0.8% at saturation would alter fit-up clearance.
Repeated flexure in electrical enclosure wire management is governed less by tensile modulus than by plastic strain hardening at snap-fit and hinge features. When PA 2201 replaces glass-filled PA12 in this application, living hinge cable guides printed at 0.10 mm layer thickness exhibit fatigue cracking along scan lines if the hinge line runs perpendicular to the laser vector; therefore, the hinge axis is oriented parallel to the scan direction and limited to 0.6 mm thickness. Insert force for snap hooks is controlled by cut-outs in the CAD model rather than material modulus, and the dry tensile elongation of 18% per DIN EN ISO 527-2 permits deflection without fracture. A 30–50% recovered powder blend is accepted for noncritical wire guides if dimensional tolerance is not tight, while snap-fit clips and hinge elements use 50% virgin powder to maintain resilience. UL 94 HB flammability for unfilled PA2201 restricts unfiltered use near high-energy ignition sources, so secondary flame-retardant coating or material substitution is required where UL 94 V-2 or V-0 applies. Terminal products are DIN-rail wire guides, cable chain links, and snap-in terminal block retainers.
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EOS PA 2201 Nylon 12 is an unfilled polyamide 12 powder for selective laser sintering. The powder is supplied in a natural white color with a typical average particle size near 56 µm and an apparent bulk density of approximately 0.45 g/cm³. Under standard process conditions, sintered parts reach a part density of roughly 0.93 g/cm³. Manufacturer-documented mechanical values from XY-orientation specimens include tensile modulus of 1700 MPa and tensile strength of 48 MPa under ISO 527-1/-2, elongation at break of 18% under the same method, and flexural modulus of 1500 MPa under ISO 178. The material is processed with CO₂ laser energy at 10.6 µm, using layer thicknesses of 0.10 mm or 0.12 mm. Because the formulation contains no glass fiber or mineral reinforcement, the mechanical response remains close to the base polyamide 12 matrix.
The product occupies the unfilled polyamide 12 class within the EOS powder portfolio. Published datasheet values for PA 2201 and PA 2200 overlap for monotonic tensile properties, with both listing tensile modulus of 1700 MPa and tensile strength of 48 MPa. The practical distinction between the two is not primarily detectable in bulk polymer chemistry; it appears in powder-lot particle size distribution, recyclability response, and finished-surface behavior. Published peer-reviewed data specific to PA 2201 is limited, so serial-production qualification requires lot-specific test reports rather than reference to generic polyamide 12 data.
Glass-filled PA 3200 GF represents a separate stiffness class within the same laser sintering material family. Published values for PA 3200 GF list tensile modulus of 3200 MPa, tensile strength of 51 MPa, elongation at break of 9%, and flexural modulus of 3000 MPa under ISO 527-1/-2 and ISO 178. PA 2201 therefore provides lower stiffness but higher elongation at break. When a part is converted from PA 3200 GF to PA 2201, elastic deflection under an identical tensile load increases by approximately 1.9 times because elastic deflection scales inversely with tensile modulus. Conversely, unfilled PA 2201 is less brittle and is better suited to snap-fit and clip features where the lower elongation of a glass-filled grade would limit function.
| Property | PA 2201 | PA 3200 GF | Method |
|---|---|---|---|
| Tensile modulus | 1700 MPa | 3200 MPa | ISO 527-1/-2 |
| Tensile strength | 48 MPa | 51 MPa | ISO 527-1/-2 |
| Elongation at break | 18% | 9% | ISO 527-1/-2 |
| Flexural modulus | 1500 MPa | 3000 MPa | ISO 178 |
These values are representative datasheet figures, not guaranteed minima. Build orientation, powder age, refresh fraction, and build chamber thermal control shift the measured values. Because laser-sintered parts are anisotropic, Z-direction tensile elongation in unfilled polyamide 12 is lower than XY-direction elongation. For PA 2200-class powders, Z-direction elongation is often reported in the 4% to 6% range, and the same orientation sensitivity should be assumed for PA 2201 unless lot-specific data confirms otherwise.
Production laser sintering of PA 2201 is performed on industrial systems such as the EOS P396 fitted with a 70 W CO₂ laser or the smaller FORMIGA P 110 fitted with a 30 W CO₂ laser. Build chamber temperature is held in the 168°C to 172°C range, with polyamide 12 melting onset near 176°C under ISO 11357. The process operates in a narrow thermal window. A build chamber temperature more than 2°C below the optimized setpoint can produce elevated porosity and reduced tensile strength. A temperature approaching the melting onset too closely causes powder caking, binds parts to the surrounding powder bed, and increases post-processing labor.
Layer thickness is fixed at 0.12 mm for balanced production, with 0.10 mm used when finer feature resolution is required. The operator-set laser power, scan speed, and hatch distance are normally supplied as a machine-specific material profile. Manual modification without a validated parameter set is not recommended because the rapid crystallization kinetics of polyamide 12 leave limited tolerance for parameter drift. An inert nitrogen atmosphere is maintained in the process chamber to limit oxidative yellowing. Measured oxygen concentration above approximately 1.0% to 1.5% can discolor powder and may alter melt behavior.
On a production line equipped with a 70 W CO₂ laser and a 0.12 mm layer thickness, the cooling stage often becomes the throughput bottleneck. Unfilled PA 12 parts are frequently left in the build cake for 6 h to 12 h after sintering to allow a controlled decline from build temperature to below 80°C before extraction. Premature removal of large flat panels produces edge curl and dimensional drift that cannot be corrected downstream by machining. Dimensional accuracy also requires machine-specific shrinkage calibration. Typical SLS polyamide 12 linear shrinkage is 2.5% to 3.5% in the XY plane and 1.5% to 2.5% in the Z direction, but compensation factors must be derived from calibrated build artefacts on the target machine.
As-built surface roughness for SLS polyamide 12 is commonly reported as Ra 8 µm to 12 µm. Bead blasting reduces the surface to approximately Ra 6 µm to 8 µm. Vibratory finishing can reduce roughness further but alters edge definition and small feature geometry. These finishing steps are part of the final dimensioned article and must be included in any measurement study using ISO 4287 or equivalent surface texture methods.
Polyamide 12 absorbs less water than PA 6 or PA 66, but it is not hydrophobic. Under ISO 62, equilibrium moisture uptake for PA 12 at 23°C and 50% relative humidity is approximately 1.1% to 1.5% by mass, with water saturation near 1.4% to 1.8%. This level provides better dimensional stability than short-chain nylons, but moisture remains a process variable. If powder is stored in relative humidity above 60%, pre-drying at 80°C for 4 h to 8 h is required before sintering. Moisture not removed from the powder can generate microvoids, increase part porosity, and lower tensile strength.
Powder recycling is standard in SLS production. Unfilled PA 12 powders are commonly refreshed with virgin material at rates of 30% to 50% for many applications. For PA 2201, serial production requires melt flow rate testing under ISO 1133-1:2022 and part density verification to confirm that aged powder has not shifted processing behavior. Powder held above 170°C for extended periods may contain degraded fines that reduce recoater flow and alter surface roughness. A high fines fraction below 20 µm can produce streak defects in the powder bed and batch-to-batch variability in part quality.
Applications for PA 2201 concentrate in functional prototypes, production aids, jigs, fixtures, low- to medium-volume end-use parts, and components with snap-fit or clip geometry. In automotive and industrial equipment, the material is evaluated by short-term tensile and impact testing under ISO 527-1/-2 and ISO 179-1/1eA. Because unfilled PA 12 has a heat deflection temperature near 85°C under ISO 75, PA 2201 is not selected for continuous load-bearing service above that range. Chemical exposure to dilute acids, alkalis, oils, and aliphatic hydrocarbons is generally tolerated at ambient temperature. Strong oxidizing acids and polar solvents at elevated temperature can embrittle or dissolve the polymer.
For medical device prototype work, PA 2201 must be treated as an engineering powder rather than a finished medical device. Compliance with ISO 10993-1 depends on the entire production route, including post-process cleaning, sterilization method, and lot traceability. For food-contact uses, nylon 12 may fall under FDA 21 CFR 177.1500, but migration testing on the sintered article is required before a compliance statement can be made. The same principle applies to REACH and RoHS: material certification must be drawn from the specific powder lot and the final article, not assumed from generic powder type.
| Compliance area | Applicable method or standard | PA 2201 position |
|---|---|---|
| Tensile modulus | ISO 527-1/-2 | 1700 MPa representative XY |
| Heat deflection temperature | ISO 75 | Near 85°C for unfilled PA 12 |
| Water absorption | ISO 62 | 1.1% to 1.5% at 50% RH |
| Flame class | UL 94 | HB |
| Biocompatibility | ISO 10993-1 | Final article dependent |
| Food contact | FDA 21 CFR 177.1500 | Migration testing required |
| RoHS | IEC 63000 | Lot certificate dependent |
Unfilled polyamide 12 is not inherently flame retardant. Typical SLS specimens are rated HB under UL 94, not V-0. If a flame-retardant requirement is present, a filled or modified grade must be qualified. Electrical surface resistivity and dielectric strength are also moisture dependent. Measurements under IEC 62631-3-1 or ASTM D257 obtained at 50% RH differ from those at 80% RH because absorbed water increases surface conductivity. These operational boundaries, not the raw tensile datasheet, define where PA 2201 remains suitable in production.
