PA66 GF30 is nylon 66 with 30% short glass fiber by weight. It is one of the most used engineering compounds in the world, found in engine covers, brackets, connectors and power tool housings. The glass roughly triples stiffness and lifts heat deflection above 230°C, close to the melting point of the base resin.
Typical PA66 GF30 properties
| Property | Typical value | US units | Test method |
|---|---|---|---|
| Density | 1.37–1.39 g/cm³ | 0.049–0.050 lb/in³ | ASTM D792 / ISO 1183 |
| Tensile strength | 170–200 MPa | 24,700–29,000 psi | ASTM D638 / ISO 527 |
| Flexural modulus | 8.5–10.0 GPa | 1,230,000–1,450,000 psi | ASTM D790 / ISO 178 |
| Notched Izod impact | 100–130 J/m | 1.9–2.4 ft·lb/in | ASTM D256 |
| Heat deflection, 1.8 MPa (264 psi) | 235–250°C | 455–482°F | ASTM D648 / ISO 75 |
| Water absorption, 24 h | 0.70–1.00% | ASTM D570 / ISO 62 | |
| Mold shrinkage | 0.5–1.1% | 0.005–0.011 in/in | ASTM D955 / ISO 294-4 |
Typical ranges for standard grades, dry as molded, from published data sheets. Your grade’s own data sheet and the lot COA are what count. Notched Izod uses 3.2 mm (1/8 in) bars.
Processing and drying
| Processing | Typical |
|---|---|
| Melt temperature | 536–581°F / 280–305°C |
| Mold temperature | 176–248°F / 80–120°C |
| Drying | 176–180°F / 80–82°C, 2–4 h, often longer |
| Target moisture | Below the unfilled target, scaled by resin share (see drying guide) |
| Max barrel residence | 10 min |
| General | Typical |
|---|---|
| Clarity | Opaque |
| Chemical resistance | Good: fuels, oils, greases, glycol |
Starting points only. See the full processing temperature chart and drying guide for every resin.
What changes these numbers
- Dry vs. conditioned. Data sheets list dry-as-molded values first. Once the part takes on moisture (about 50% relative humidity), tensile strength and stiffness drop by roughly a third. Design to the conditioned numbers.
- Glass level. GF30, GF33 and GF35 grades are close enough that many buyers treat them as one family. Check the exact percentage your print calls for.
- Additive package. Heat-stabilized, hydrolysis-resistant, impact-modified and flame-retardant grades change heat aging and impact more than the base numbers above.
- Flow direction. Shrinkage across the flow runs about twice the flow-direction value, which is why glass-filled nylon parts can warp.
Common PA66 GF30 grades
- GF15, GF25, GF30, GF33, GF35, GF43 and GF50
- Heat-stabilized grades for under-hood heat aging
- Hydrolysis-resistant grades for coolant and glycol contact
- Impact-modified glass-filled grades
- Flame-retardant grades
- Natural and black
Common questions
What is the density of PA66 GF30?
Typically about 1.37–1.39 g/cm³ (0.049–0.050 lb/in³), compared with about 1.14 g/cm³ for unfilled PA66.
What is the heat deflection temperature of PA66 GF30?
Typically about 235–250°C (455–482°F) at 1.8 MPa (264 psi). Unfilled PA66 is only about 70–90°C on the same test.
Does PA66 GF30 need drying?
Yes. Dry at about 80°C (176–180°F) for 2–4 hours in a dehumidifying dryer, often longer for filled grades. Wet nylon splays and loses strength, sometimes with no visible defect.
Need PA66 GF30, or something close?
A polymer chemist reviews every request, then matches your grade or finds a qualified equivalent and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province