PA612 FR (Flame retardant, UL 94 V-0)
Flame-retardant grade
Compounded (usually GF-reinforced) FR grade for connectors and cable accessories requiring V-0 at 1.5 mm.
Values for the FR condition
Other PA612 grades and fills
PA612 is listed in 12 conditions; see the grade overview at PA612.
Compare all 12 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Impact-modified / super-tough | Elastomer-toughened compound for cold-impact fuel/air lines and clips that must survive −40 °C hits. | 42 | 45 | 300 | 70 Shore D |
Unfilled natural, conditioned (50 % RH / equilibrium) | Use for real service conditions: ~1.0–1.3 % absorbed water softens and toughens the part; stiffness drop is far smaller than for PA6/PA66. | 45 | 48 | 250 | 75 Shore D |
Internally lubricated (PTFE / MoS2 / oil), bearing grade | For unlubricated gears, bushings and slides — lowers friction and PV wear at some cost in strength. | 50 | 52 | 40 | 77 Shore D |
ESD / antistatic | Choose for fuel-line and fuel-handling parts needing static dissipation to avoid spark risk. | 53 | 55 | 25 | 80 Shore D |
High-viscosity extrusion grade | High molecular weight for melt strength in tube/filament extrusion and machinable rod & plate; higher toughness, slower cycle. | 53 | 55 | 250 | 78 Shore D |
Heat-stabilised | Copper-halide or organic heat-stabiliser package for long-term 120–140 °C air/oil exposure in fuel and brake lines. | 55 | 57 | 200 | 78 Shore D |
NAT-DAMDefault Unfilled natural, dry-as-moulded | Baseline injection/extrusion grade evaluated dry — use these numbers for short-term stiffness, tolerances and electrical design. | 58 | 60 | 120 | 79 Shore D |
Mineral-filled | Pick when low warpage and isotropic shrinkage matter more than peak strength (covers, trim, painted parts). | 62 | 65 | 12 | 82 Shore D |
15 % glass-fibre reinforced | Moderate stiffness/creep upgrade while keeping useful ductility and a smooth surface. | — | 105 | 6 | — |
FRThis page Flame retardant, UL 94 V-0 | Compounded (usually GF-reinforced) FR grade for connectors and cable accessories requiring V-0 at 1.5 mm. | 118 | 120 | 2.5 | 86 Shore D |
30 % glass-fibre reinforced | Workhorse structural grade for gears, housings and quick-connectors needing high stiffness with low moisture drift. | — | 155 | 3.5 | 92 HRM |
50 % glass-fibre reinforced | Maximum stiffness/creep resistance for metal-replacement brackets; brittle and abrasive to tooling. | — | 195 | 2.5 | — |
What is PA612 FR?
PA612 FR is PA612 in the FR grade — compounded (usually GF-reinforced) FR grade for connectors and cable accessories requiring V-0 at 1.5 mm. PA612 FR has a yield strength of 118 MPa (17.1 ksi) and a tensile strength of 120 MPa (17.4 ksi) — stronger than 99% of polymer grades. Elongation at break is 2.5% and the elastic modulus is 8 GPa (1.16 Msi). PA612 FR has a density of 1.4 g/cm³ (0.0506 lb/in³), heavier than 79% of polymer grades. Its glass-transition temperature is 48°C (118 °F). NAT-DAM is the default condition FabDigit quotes; FR is available on request or by drawing note.
Advantages
- High strength — 118 MPa (17.1 ksi), better than 99% of polymer grades
- Stiff — 8 GPa (1.16 Msi), better than 91% of polymer grades
- Conducts heat well — 0.35 W/m·K (0.202 BTU/hr·ft·°F), better than 91% of polymer grades
- Low, predictable mold shrinkage — 0.4%, better than 82% of polymer grades
Limitations
- Limited ductility — 2.5%, worse than 89% of polymer grades
- Limited formability — 10/100, worse than 87% of polymer grades
- Difficult to machine — 40/100, worse than 82% of polymer grades
- Heavy — 1.4 g/cm³ (0.0506 lb/in³), worse than 79% of polymer grades
- High embodied carbon — 7.5 kg CO₂/kg, worse than 79% of polymer grades
PA612 FR properties
Typical room-temperature values for PA612 FR; 27 are specific to this condition. Other listed values are PA612 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical6
PA612 FR has a density of 1.4 g/cm³ (0.0506 lb/in³), heavier than 79% of polymer grades. Its glass-transition temperature is 48°C (118 °F).
Mechanical16
PA612 FR has a yield strength of 118 MPa (17.1 ksi) and a tensile strength of 120 MPa (17.4 ksi) — stronger than 99% of polymer grades. Elongation at break is 2.5% and the elastic modulus is 8 GPa (1.16 Msi).
Thermal11
PA612 FR is rated for continuous service to 120°C (248 °F). It conducts heat at 0.35 W/m·K (0.202 BTU/hr·ft·°F), better than 91% of polymer grades. Thermal expansion is 100 µm/m·K (55.6 µin/in·°F).
Electrical7
PA612 FR is an electrical insulator with a dielectric strength of 28 kV/mm (711.2 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (74/100), worse than 68% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of PA612 FR takes about 130 MJ of energy and emits 7.5 kg of CO₂ — more than 77% of polymer grades. Typical recycled content is 0%.
Manufacturability7
PA612 FR's machinability is fair (40/100, worse than 82% of polymer grades); weldability poor (20/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PA612 FR
Is PA612 easy to machine?
Machines easily with sharp positive-rake tools, high speed and light feed; anneal stress-relieve and allow for post-machining moisture pickup, though drift is ~1/3 of PA6.
Can PA612 be welded?
Hot-plate, ultrasonic, vibration, IR and laser welding all work on dry material; dry to <0.1 % moisture before welding or moulding to avoid bubbles and MW loss.
Can PA612 be formed, bent or molded?
Dry 4 h at 80 °C, mould at 250–285 °C melt and 60–100 °C tool; shrinkage 1.0–1.8 % unfilled (anisotropic 0.3–0.7 % in GF grades) — gate thick sections to control voids.
What surface finishes work on PA612?
Takes textured tool finishes, pad printing and laser marking well; paint/adhesive bonding needs plasma or flame pretreatment, and unstabilised natural colour yellows outdoors.
PA612 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| hexamethylenediamine (HMDA) unit1,6-hexanediamine residue | 32 – 35 | 33.5 |
| heat/UV stabiliser & lubricant packagegrade dependent | 0.1 – 2 | 0.5 |
| glass fiber0 for the unfilled default; 15/30/50 % in GF variants | 0 – 50 | 0 |
| dodecanedioic acid (DDDA) unitC12 diacid residue; PA612 repeat unit -[NH(CH2)6NHCO(CH2)10CO]- | ≥ 65 (balance) | — |
PA612 FR — frequently asked
What is PA612 FR used for?
PA612 FR is typically used for electrical connectors, automotive fuel system components, flexible tubing and monofilaments. In short: low-moisture-absorption nylon; dimensionally stable PA6 substitute; broad filled grade range.
What is the yield strength of PA612 FR?
PA612 FR has a typical yield strength of 118 MPa (17.1 ksi) and a tensile strength of 120 MPa (17.4 ksi) — stronger than 99% of polymer grades. Strength varies by condition: see the 12 listed tempers.
Is PA612 FR easy to machine?
Not especially — machinability is rated fair (40/100, worse than 82% of polymer grades). Machines easily with sharp positive-rake tools, high speed and light feed; anneal stress-relieve and allow for post-machining moisture pickup, though drift is ~1/3 of PA6.
Can PA612 FR be welded?
Not readily — weldability is rated poor (20/100). Hot-plate, ultrasonic, vibration, IR and laser welding all work on dry material; dry to <0.1 % moisture before welding or moulding to avoid bubbles and MW loss.
What surface finishes work on PA612 FR?
Takes textured tool finishes, pad printing and laser marking well; paint/adhesive bonding needs plasma or flame pretreatment, and unstabilised natural colour yellows outdoors.
Can PA612 FR be formed, bent or molded?
Dry 4 h at 80 °C, mould at 250–285 °C melt and 60–100 °C tool; shrinkage 1.0–1.8 % unfilled (anisotropic 0.3–0.7 % in GF grades) — gate thick sections to control voids.
What is the maximum service temperature of PA612 FR?
PA612 FR is rated for continuous use to about 120°C (248 °F), and briefly to 160°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between PA612 NAT-DAM and PA612 FR?
NAT-DAM is the default condition — baseline injection/extrusion grade evaluated dry — use these numbers for short-term stiffness, tolerances and electrical design. FR: compounded (usually GF-reinforced) FR grade for connectors and cable accessories requiring V-0 at 1.5 mm. Yield strength is 58 MPa in NAT-DAM versus 118 MPa in FR.
Sources
- VESTAMID D (PA612) product range data — Evonik (2022)
- Zytel 151 / PA612 resin datasheets — DuPont / Celanese (2021)
- CAMPUS plastics database, PA612 entries (ISO 10350) — CWFG (2023)
- Engineered Materials Handbook Vol.2: Engineering Plastics — ASM International (1988)
- ISO 1874-1/-2 Plastics — Polyamide (PA) moulding and extrusion materials — ISO (2010)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.