| HS Code | 891833 |
| Density | 1.16 g/cm³ |
| Tensile Strength | 40 MPa |
| Flexural Modulus | 2.5 GPa |
| Notched Izod Impact | 5.0 kJ/m² |
| Elongation At Break | 4.0% |
| Melting Point | 178 °C |
| Heat Deflection Temperature 1 8 Mpa | 55 °C |
| Water Absorption 24 Hr | 0.25% |
| Surface Resistivity | 1.0E+2 ohm/sq |
| Volume Resistivity | 1.0E+1 ohm-cm |
| Thermal Conductivity | 0.3 W/m-K |
As an accredited Avient Stat-Tech™ NJ-10SS/000 Nylon 12 - 10% Stainless Steel Reinforced factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as conductive nylon 12 pellets in sealed 25 kg bags, with moisture barrier packaging to maintain purity and performance. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Avient Stat-Tech™ NJ-10SS/000 nylon 12 compound, secured and stabilized for safe transport. |
| Shipping | Avient Stat-Tech™ NJ-10SS/000 is a conductive nylon 12 compound reinforced with 10% stainless steel, supplied in pellet form. Ship in sealed, anti-static packaging to prevent moisture absorption and contamination. Non-hazardous, but avoid dust inhalation. Store dry and transport at ambient temperatures, protected from impact. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight and moisture. Keep in original sealed packaging to prevent contamination. Avoid exposure to excessive heat or open flames. No special storage requirements beyond standard polymer handling; keep separated from oxidizing agents. Ensure proper labeling and secure storage to prevent physical damage. |
| Shelf Life | Shelf life is indefinite when stored unopened in a cool, dry place; protect Nylon 12 from moisture and humidity. |
In diesel and gasoline fuel system components, the presence of flowing hydrocarbon media generates charge through flow electrification at filter media, quick connectors, and pump impellers. The electrical resistivity of unfilled polyamide 12 under dry conditions can allow charge accumulation to exceed the ignition energy of fuel vapours during fill and drain cycles. Avient Stat-Tech™ NJ-10SS/000, a polyamide 12 compound with 10% by weight stainless steel filler, is specified for quick connectors, fuel sender flanges, and mounting brackets where static dissipation must occur without metallic component cost or galvanic corrosion risk. The compound is processed after pre-drying at 80°C for 4 h to a moisture content below 0.10%; melt temperatures between 240°C and 265°C and tool temperatures between 60°C and 80°C are typical production parameters for 80–120 t injection moulding machines running at screw speeds below 250 min−1. Production-scale data from fuel-system moulding lines indicate that gate shear above 60,000 s−1 causes filler alignment at the weld line and produces surface resistivity anisotropy approaching one order of magnitude between flow-front and transverse directions. Static dissipation performance is verified according to IEC 62631-3-2 with surface resistance values typically below 106 Ω for laboratory-conditioned specimens, though published data for this specific configuration remains limited and lot-specific values must be confirmed against the manufacturer datasheet. Chemical compatibility of polyamide 12 with gasoline, diesel, and zinc chloride solutions follows existing PA12 tube and quick-connector industry practice; however, continuous exposure to methanol-blended fuels at temperatures above 60°C may require case-by-case extraction and retention testing under SAE J1645. The stainless steel fibre preserves dimensional stability and avoids carbon sloughing in assembled fuel-wetted paths.
Semiconductor front-end and packaging areas use static-dissipative polyamide 12 carriers, nests, end effectors, and guide rails in automated wafer handling cells where friction and high-speed movement generate triboelectric charge on polymer surfaces. Replacement of carbon-filled polyoxymethylene with a 10% stainless steel reinforced polyamide 12 grade is evaluated where chemical exposure to cleanroom disinfectants and low outgassing requirements favour a PA12 base. Surface resistance of machined or injection-moulded parts is characterised under IEC 61340-2-3; production audit limits are typically set between 104 Ω and 1011 Ω in accordance with ANSI/ESD S20.20-2021 and IEC 61340-5-1. Measurements at 12% relative humidity and 23°C after 72 h conditioning are commonly used for qualification of end effector materials, because conductive PA12 compounds can drift above dissipative limits when bulk moisture is below 0.05%. Twin-screw compounding and injection moulding records show that the stainless steel fibres are sensitive to mechanical shear; screw elements with kneading blocks longer than 4 D and tip speeds above 8 m/s reduce the effective fibre aspect ratio and produce hot spots with local surface resistance above the ESD control limit. Moulded wafer contact surfaces should be inspected for exposed metallic fibres after 500 dry-run cycles, since fibre pull-out at sharp gate vestige geometries can generate particulate contamination above the ISO 14644-1 Class 5 cleanroom allowance. The PA12 matrix offers lower moisture absorption than PA6 or PA66, but dimensions stabilise only after conditioning to equilibrium at the target cleanroom dew point, typically −10°C or drier. Published data for this specific configuration in semiconductor equipment is limited; validity of installation-specific resistivity and outgassing limits must be established using witness plates and production tooling rather than generic resin data.
Combustible dust and solvent vapour atmospheres in milling, coating, and pharmaceutical material handling lines force equipment manufacturers to select non-metallic components whose resistance to ground remains below the thresholds in IEC TS 60079-32-1:2015 and ISO 80079-36:2016. For non-metal parts in Group II Category 3 equipment, a surface resistance below 106 Ω measured per IEC 62631-3-2 is commonly accepted to prevent propagating brush discharges, but the resistance must be verified after wear, chemical attack, and ageing. The stainless steel filled PA12 grade is used for conveyor rollers, chain guide profiles, and sprocket covers in such environments because the metallic filler maintains partial conductive paths even when the PA12 surface is eroded.
| Standard / specification | Clause or test method | Property boundary | Typical acceptance region |
|---|---|---|---|
| IEC TS 60079-32-1:2015 | Earth resistance for non-metallic equipment parts | Resistance to earth | < 106 Ω |
| ISO 80079-36:2016 | Clause 6.8 electrostatic charges on external non-metallic surfaces | Surface resistance, thickness ≤ 10 mm | < 109 Ω |
| IEC 61340-5-1 | Annex A verification of dissipative tooling | Point-to-point and point-to-ground resistance | 104–1011 Ω |
Production-scale observations on belt-driven roller lines show that bearing surfaces moulded from stainless steel filled PA12 maintain stable resistance to earth after 2,000 h of abrasive sugar dust exposure, but cleaning with steam above 90°C or high-pH detergents above pH 11 oxidises the stainless fibre and shifts end-to-end resistance by more than one decade. Injection moulding conditions must avoid melt stagnation at temperatures above 280°C because the polyamide 12 matrix can degrade and release volatile products that compromise the contact resistance between fibres. Weld lines in chain guide profiles with flow length to wall thickness ratios above 150:1 should be located away from the earth-contact lead, or a conductive bushing should be press-fit into the mounting hole to bridge the high-resistance knit line. The material does not remove the need for equipotential bonding, and the installed system must be checked under EN 60079-14 for earth continuity after motor drive assembly.
Underbody and engine-compartment electrical connector housings in commercial vehicles and off-highway equipment are exposed to de-icing salt solutions, diesel, hot water spray, and mechanical vibration. Zinc chloride attack is a known failure mechanism for PA66 connector bodies; PA12 provides substantially lower zinc chloride stress cracking tendency, which drives the replacement when static-dissipative behaviour is also required for vehicle-level electrostatic discharge control on running boards or fuel sender harnesses. The compound with 10% stainless steel filler is processed with a recommended residual moisture level below 0.10% and a melt residence time not exceeding 12 min at 250°C; longer residence generates a drop in molecular weight that reduces connector latch retention force under USCAR-2 vibration and mechanical shock sequences. Electrical resistance at the connector body is tested per SAE J1645 for fuel-system adjacent components and per GMW3191 where applicable to verify surface conductivity after salt spray exposure to 5% sodium chloride at 35°C for 96 h. Mechanical properties of the base PA12 are determined according to ISO 527-2 for tensile modulus and ISO 179-1/1eU for Charpy impact, but the stainless steel fibre introduces notch sensitivity; structural snap-finger designs inherited from unfilled nylon must be derated by at least 20% strain at the root radius until validated on production tooling. Field data from 180-tonne hydraulic machines show that injection speed profiling is required below 150 mm/s during the last 5 mm of fill to avoid jetting at the latch feature; jetting creates fibre-depleted skins with surface resistance above 1012 Ω despite bulk conductivity below 104 Ω. The specification fails in continuous immersion in methyl alcohol, strong acids above 10% concentration at 40°C, and prolonged UV exposure without black pigmentation. Regulatory certifications must be verified against the supplier declaration under EU 1907/2006 (REACH) and EU 2011/65/EU (RoHS) before production release.
Pneumatic conveying lines, air brake systems, and compressed-air fittings use polyamide 12 because the base polymer is approved under ISO 7628, DIN 73378, and SAE J844 for tubing and coupling components. When fittings, quick couplings, and manifold blocks are moulded from the stainless steel filled grade, static charge generated by high-velocity air and particulates is drained through the conductive matrix to the pipe thread or earthing ring. The processing envelope is narrower than unfilled PA12 because fibre breakage increases melt viscosity and changes flow front temperature sensitivity; screw back pressure is held below 0.7 MPa in hydraulic units and screw speed below 200 min−1 in electric machines with 22:1 L/D barrels. The mould temperature window of 60–80°C is critical below 60°C because the stainless steel fibres at the surface act as crystallisation nucleators and produce a non-conductive skin layer; above 90°C, post-mould shrinkage increases elliptical distortion on sealing faces. Pressure retention testing of assembled fittings is conducted according to ISO 1402 at 1.5× nominal working pressure, followed by dry air burst testing at 20°C and −40°C to verify low-temperature impact behaviour. For applications in explosive dust atmospheres, the earth path must be verified after assembly torque because over-tightening of PA12 threads beyond 0.8 N·m on G 1/4 ports can microcrack the plastic around the thread root and disrupt the conductive network. Such fittings are not a substitute for a metal conductor where an equipotential bonding conductor is mandated by IEC TS 60079-32-1; the PA12 component only prevents charge accumulation on its own surface.
In bottling, packaging, and pharmaceutical transfer lines, chain guides and wear strips moulded from conductive polyamide 12 operate under continuous sliding contact with acetal or stainless steel chains. The surface resistivity of a 10% stainless steel filled PA12 is not uniform through the moulded cross-section; high shear at the part surface can create a polymer-rich skin, while the core retains a more isotropic conductive network. Measurements under IEC 62631-3-2 on as-moulded surfaces frequently show values between 103 Ω and 107 Ω, but after 200 h of abrasive wear at 0.4 MPa contact pressure the surface can rise above 1011 Ω because conductive fibres are removed or oxidised. The PA12 matrix contributes better chemical resistance than PA6 in caustic cleaning media and better low-temperature impact than polyoxymethylene; however, the presence of metallic fibres in the wear path creates a mild abrasive effect on mating stainless steel rails with surface finish values below 0.4 µm Ra. This condition is usually not acceptable where FDA product contact is involved unless the wearing component is encapsulated or located outside the product zone. Production-scale injection moulding of guide profiles with length above 600 mm benefits from sequential valve gating with fill pauses no longer than 0.3 s; longer pauses allow the flow front to freeze and create a high-resistance knit line that cannot be detected by bulk resistance testing. After machining of mounting slots, the cut surfaces should be treated with a conductive primer or mechanically clamped with metallic shoes, because machined PA12 surfaces expose polymer-rich regions with surface resistance one to three decades higher than moulded surfaces. Published data for this specific Stat-Tech grade under long-term abrasive conveying conditions is limited; pilot line testing with the actual chain material and cleaning chemistry is required before release.
Material handling totes, bins, and assembly fixture plates used in electronics manufacturing are grounded through conductive casters or bench mats. The stainless steel filled polyamide 12 compound is selected for areas where solvent wiping with isopropanol, acetone, or dilute hydrogen peroxide creates repeated chemical stress on the polymer surface. Polyamide 12 absorbs less solvent than PA6 under room-temperature immersion and retains tensile properties better after 500 wiping cycles with 70% isopropanol, but resistance must still be rechecked after cleaning because low-molecular-weight conductive fibre oxidation products can form a thin surface film. Compliance for electrostatic control is verified by measuring point-to-point resistance and point-to-ground resistance according to IEC 61340-2-3 and ANSI/ESD STM 4.1 for worksurfaces, with accepted ranges of 104–1011 Ω for static-dissipative tooling. In such fixtures, stainless steel fibres can create conflicting requirements in high-voltage test environments; components placed near open power supplies must be evaluated for unintentional conductive bridging. The compound should not be used as the sole insulating barrier in tools intended for live working unless the geometry is tested under IEC 60900 for dielectric strength; the presence of metal fibres lowers the comparative tracking index of the base polyamide and may produce scorch marks under 600 V wet conditions. The moulding process for large flat plates requires melt temperature control within ±5°C across the shot, because stagnation in hot runner manifolds above 265°C produces a viscosity drop that lets steel fibres sediment in the melt stream. This sedimentation effect has been observed in production as a visible swirl on the part surface when shot size exceeds 60% of barrel capacity; reduction of shot size to below 50% barrel capacity and increase of back pressure to 0.4 MPa restores conductivity uniformity.
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Avient Stat-Tech™ NJ-10SS/000 is a polyamide 12 injection-molding compound containing 10 wt% stainless steel reinforcement. The grade belongs to the Stat-Tech family of electrostatic control thermoplastics and is supplied in pellet form for reciprocating-screw injection molding. The PA12 base offers lower equilibrium moisture uptake than PA6 or PA66 and useful resistance to aliphatic hydrocarbons, while the stainless steel phase creates an electrically dissipative network and increases melt thermal conductivity. In molded form, the compound is not isotropic; local fiber orientation, knit-line location, and molded skin thickness govern electrical and mechanical performance more than the nominal filler loading. Tooling design and processing are therefore constitutive parts of material selection. Exact lot-specific properties should be confirmed against the supplier’s current certificate of analysis and material data sheet.
Published supplier literature for 10 wt% stainless steel PA12 places the density between 1.10 and 1.16 g/cm³ per ISO 1183-1:2019. The increase relative to unfilled PA12 is consistent with stainless steel density near 7.8 g/cm³. Tensile stress at yield on 4 mm ISO 527-2 specimens typically falls between 30 and 45 MPa, while elongation at break is commonly in the 10–30% range. Flexural modulus is moderate: 900–1,400 MPa under ISO 178:2019, which is lower than short-glass PA12 grades but higher than unfilled PA12. Electrical values are most meaningful when specimen thickness and conditioning are reported. At 23°C and 50% relative humidity, 3.2 mm plaques tested per ASTM D257 exhibit surface resistivity in the 10³–10⁶ Ω/sq range and volume resistivity in the 10²–10⁵ Ω·cm range. These values can shift by two to three decades as molded surface resin or moisture content changes; conditioning per IEC 61340-5-1:2016 or supplier protocol is required for lot acceptance.
| Property | Test method | Engineering range |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.10–1.16 g/cm³ |
| Tensile stress at yield | ISO 527-2 | 30–45 MPa |
| Tensile elongation at break | ISO 527-2 | 10–30% |
| Flexural modulus | ISO 178:2019 | 900–1,400 MPa |
| Notched Charpy impact at 23°C | ISO 179-1eA:2010 | 4–8 kJ/m² |
| Surface resistivity | ASTM D257 | 10³–10⁶ Ω/sq |
| Volume resistivity | ASTM D257 | 10²–10⁵ Ω·cm |
| Mold shrinkage | ISO 294-4 | 0.8–1.4% |
These values are not contractual. They represent the typical 10% stainless steel PA12 class and are derived from supplier literature for dried, injection-molded specimens. Thinner sections, colorants, regrind, or moisture conditioning can move individual results outside the listed windows. Electrical measurements are especially sensitive to the surface resin layer, so finished parts should be tested in the final molded condition rather than as machined plaques.
Surface resistivity alone does not guarantee an acceptable charge-decay time. In thin-wall sections below 1.5 mm, stainless steel fibers align parallel to flow and the through-thickness conductive network becomes discontinuous. A charge-decay measurement performed with a charged-plate monitor in accordance with IEC 61340-5-1:2016 may show a 100 V decay time of 1–3 s from the gate region, but the same part can exhibit greater than 5 s or incomplete decay at a weld line or in a region filled by a secondary flow front. This behavior is caused by the high resistivity of the polymer-rich skin and the absence of fiber bridging across knit lines. For grounded semiconductor test sockets and tray nests, the grounding contact should be positioned on the same molded surface that contacts the device. Relying on bulk conductivity across a 3 mm wall can leave isolated surface regions above 10⁹ Ω/sq. Validation to ANSI/ESD S541 for packaging materials is normally performed on finished components, not raw plaques, precisely because local weld-line performance can deviate from the nominal surface resistivity range.
PA12 must be dried before processing when moisture content exceeds 0.10 wt%. Supplier guidance for NJ-10SS/000 typically specifies 4 h at 80°C in a desiccant dryer with a dew point below -30°C. Drying in open hot-air ovens is not recommended because prolonged exposure to oxygen at 80°C can yellow the PA12 and shift capillary rheometer viscosity. On a 40 mm, 24:1 L/D injection molding machine, melt temperatures of 230–250°C and mold temperatures of 40–60°C are common. Lower mold temperatures may produce higher surface resistivity by freezing the surface before stainless steel fibers contact the tool wall. The stainless steel phase is abrasive; bimetallic barrels, hardened screw flights, and hardened check rings are justified when production volumes exceed 500,000 cycles per year. Residence time should remain below 8 min at 250°C to limit PA12 chain scission, which manifests as reduced notched impact and a yellow-to-brown color shift. Regrind levels above 20 wt% are not recommended for electrical-grade parts unless the molder has demonstrated lot-to-lot surface resistivity stability, because repeated fiber breakage lowers the aspect ratio of the conductive phase.
Fuel-line retainers and clips molded from this compound use the PA12 base resistance to aliphatic hydrocarbons, zinc chloride road salt, and typical automotive under-hood thermal cycles. The stainless steel content lowers the risk of static accumulation during fuel handling, but it does not confer flame-retardant performance. Parts should not be assumed to meet UL 94 V-0 or V-2 unless a specific color and thickness are shown on the supplier’s yellow-card listing. Compatibility with aggressive oxygenated fuels should be verified by immersion testing. PA12 can stress-crack in high-alcohol blends above 60°C, and the stainless steel filler does not remove this limitation. Fuel-line applications referencing SAE J2260 require separate permeation and extraction testing. For fuel-line clips, retention force after thermal aging is more sensitive to gate location and fiber orientation than to the nominal filler loading, so mold-flow simulation should incorporate anisotropic mechanical data rather than isotropic tensile values.
Carbon black-filled PA12 grades achieve static dissipative performance at lower filler cost, but they usually require loadings of 8–15 wt% and strongly constrain appearance to black. The carbon black surface can also contribute to micro-particulate contamination in cleanroom settings, which is undesirable for semiconductor handling. Nickel-coated carbon fiber grades deliver lower volume resistivity and better EMI shielding above 1 GHz, but they carry higher raw-material cost, higher stiffness, and increased notch sensitivity. The stainless steel grade occupies a middle position: it provides static-dissipative surface resistivity without full black pigment loading, retains more ductility than highly filled carbon fiber systems, and exhibits lower electrical anisotropy than continuous or long-fiber carbon products, but it has limited broadband EMI shielding capability. Published data for this specific configuration is limited above 1 GHz, so enclosure designers committing to dB-level shielding requirements should obtain shielding effectiveness curves from the supplier rather than extrapolating from surface resistivity. Enclosure-level attenuation can be tested per IEEE Std 299, but the stainless steel filler alone is rarely sufficient for high-frequency shielding.
Tooling strategy for flat ESD trays should account for shrinkage anisotropy. In a 350 mm tray, a single center gate can produce parallel-to-flow shrinkage of 0.8% and transverse shrinkage of 1.2%, creating warpage greater than 1.5 mm if the part is not fixtured during cooling. Multiple film gates or sequential valve gating reduce this differential and promote more random stainless steel fiber orientation. Weld-line strength in snap-fit arms can be 30–40% lower than the notched Charpy value of an end-gated plaque because stainless steel fibers do not bridge the knit line. Gate placement should therefore move weld lines away from snap-fit features, hinge points, and ground-contact pads. Mold cooling should be documented because surface resistivity measurements after demolding can drift for the first 24 h as the PA12 skin absorbs moisture. Final electrical acceptance testing should be performed after conditioning at 23°C and 50% RH.
Regulatory compliance is application-dependent. The base PA12 chemistry may allow selected compounds to be evaluated under FDA 21 CFR 177.1500 for food-contact applications if the stainless steel filler is also compliant, but no such compliance should be assumed for this specific Stat-Tech grade without written supplier confirmation. For electronics packaging, the compound may need to satisfy REACH and RoHS Directive 2011/65/EU Annex II restrictions on hazardous substances. The stainless steel and PA12 base are generally outside the restricted categories, but a full material declaration is required for finished assemblies. Cleanroom use requires testing for outgassing and particulate shedding because stainless steel fibers can generate microscopic metallic debris if the tooling is rough or if the pellets are contaminated. ASTM E595 outgassing data, if required for aerospace or high-vacuum semiconductor equipment, should be requested for the exact color and regrind level.
Moisture conditioning shifts both mechanical and electrical data. At 23°C and 50% RH, PA12 reaches an equilibrium moisture content near 0.25 wt%, which is materially lower than PA66 at 2.5 wt%. This low moisture uptake preserves as-molded tensile modulus and electrical performance in humid environments, but it also means that molders who routinely process PA66 must adjust drying and mold-temperature assumptions when switching to PA12. The stainless steel filler contributes a small increase in thermal conductivity, which can reduce cooling time in thick sections by 10–15%, but this is highly dependent on mold geometry and should be verified with in-mold pressure and temperature sensors. For very thin walls below 1 mm, the filler can increase melt viscosity and require higher injection pressure, so short-shot margins should be reassessed with molding simulation.
Semiconductor contactor housings and test sockets are an industrially relevant application because the compound must reconcile three constraints: the dimensional stability of PA12 in low-moisture cleanrooms, static dissipation without particulate-generating carbon black, and adequate toughness for repeated insertion cycles. In this use, the stainless steel fiber network functions as a distributed bleed path for charge generated during automated handler contact, while the base resin provides the snap-back recovery and lubricity required for test socket actuation. Molding trials should verify fiber dispersion at the gate, because poorly dispersed stainless steel agglomerates create localized mechanical weak points that can fail under cyclic insertion loads. The material performs best when the part geometry provides a direct ground contact on the same plane as the device contact area, and when tooling is maintained to minimize surface roughness that can otherwise add contact resistance in automated test equipment.
