Fortron 1140L4: specs and equivalent grades
Celanese polyphenylene sulfide (PPS) with 40% glass fiber, for injection molding. Celanese calls it inherently flame retardant, with UL 94 V-0 down to 0.38 mm on the sheet. Published data, grades to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Fortron 1140L4 is Celanese’s 40% glass reinforced polyphenylene sulfide (PPS-GF40) for injection molding. Celanese describes it as the strongest and toughest grade in the range, with heat and chemical resistance, good electrical properties and inherent flame retardancy. It contains a release agent. Published values (ISO, revised 2026-09-08): density 1,650 kg/m³ (ISO 1183), tensile modulus 14,700 MPa and tensile stress at break 195 MPa (ISO 527), HDT 270°C / 518°F at 1.8 MPa (ISO 75), melting point 280°C, and UL 94 V-0 at 1.5 mm and 0.38 mm. Celanese recommends drying at 130°C, a 310–340°C melt and a 140–160°C mold. The sheet lists no melt flow. These are typical values; confirm them on the current producer data sheet. The closest grade from another producer to ask about is Syensqo’s Ryton R-4. None is a drop-in replacement.
Also written as: Fortron 1140 L4, Fortron 1140L4 PPS, PPS-GF40. Celanese also sells related versions such as 1140L4 HR (improved hydrolysis resistance) and 1140L4 DW (developed for drinking water). Quote the full grade and color code from your drawing or bag label.
Buying Fortron 1140L4: one gaylord to a railcar · supplier COA on every prime lot · ships from 22+ partner warehouse locations · a polymer chemist checks the grade code before we quote · we aim to quote within one to three business days
Have a part number or drawing callout?
Paste it as written. A polymer chemist will tell you which grade it calls for, suggest equivalents and quote it by email.
Fortron 1140L4 specs from the data sheet
Typical values from Celanese’s Fortron 1140L4 technical data sheet (SI units, revised 2026-09-08) and its injection molding data sheet. Values are ISO and for natural material. Typical values are not specifications. Confirm them on the current producer data sheet; the lot COA shows what you actually receive. Values only compare at the same test method and condition.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | Celanese | Fortron PPS is made by Fortron Industries, a 50/50 Celanese and Kureha venture |
| Polymer | PPS-GF40 (polyphenylene sulfide, 40% glass fiber) | ISO 1043. Celanese lists a release agent; flame retardant, heat stabilized and chemical resistant |
| Process and colors | Injection molding; Celanese lists natural and black as standard colors, with other colors available | Celanese Chemille grade page |
| Regional availability | Americas, EMEA and Asia Pacific: available | Celanese Chemille grade page, November 2026 |
| Density | 1,650 kg/m³ (1.65 g/cm³) | ISO 1183 |
| Molding shrinkage, parallel / normal | 0.3 % / 0.6 % | ISO 294-4, 2577 |
| Water absorption, 24 h immersion | 0.02 % | Similar to ISO 62 |
| Tensile modulus | 14,700 MPa | ISO 527-1/-2 |
| Tensile stress / strain at break, 5 mm/min | 195 MPa (28,300 psi) / 1.8 % | ISO 527-1/-2 |
| Flexural modulus / strength | 14,500 MPa / 280 MPa | ISO 178 |
| Compressive modulus / strength | 15,000 MPa / 265 MPa | ISO 604 |
| Charpy notched impact, 23°C / −30°C | 10 / 10 kJ/m² | ISO 179/1eA. Unnotched: 53 / 53 kJ/m² (ISO 179/1eU) |
| Izod notched impact, 23°C | 10 kJ/m² | ISO 180/1A. Unnotched: 34 kJ/m² (ISO 180/1U) |
| Rockwell hardness | M 100 | ISO 2039-2 |
| Melting point / glass transition | 280°C / 90°C | ISO 11357-1/-3, 10°C/min |
| HDT at 1.8 MPa / 8 MPa | 270°C (518°F) / 215°C (419°F) | ISO 75-1/-2 |
| Ball pressure test | 260°C | IEC 60695-10-2 |
| Thermal expansion (CLTE), parallel / normal | 16 / 42 × 10−6 /K | ISO 11359-1/-2 |
| Thermal conductivity, flow / crossflow / through plane | 0.47 / 0.41 / 0.39 W/(m K) | ISO 22007-2 |
| Flammability | V-0 at 1.5 mm and 0.38 mm; 5VA at 3 mm; UL recognition: yes | IEC 60695-11-10 and -11-20; UL 94 |
| Oxygen index | 47 % | ISO 4589-1/-2 |
| Glow wire | GWFI 960°C at 0.4 mm; GWIT 825°C at 0.4 and 0.75 mm | IEC 60695-2-12 / -13. Celanese marks these “one time tested” |
| FMVSS 302 | SE | ISO 3795 (FMVSS 302) |
| Relative permittivity / dissipation factor, 1 MHz | 4.1 / 20 × 10−4 | IEC 62631-2-1 |
| Volume resistivity | 1E15 Ohm.m | IEC 62631-3-1. One time tested |
| Electric strength | 31 kV/mm | IEC 60243-1 |
| Comparative tracking index | 125 | IEC 60112 |
| Arc resistance | 134 s | UL 746B, as listed on the sheet |
| Melt flow | Not listed on the sheet | |
| Drying | 130°C, 2–4 h in a dehumidified dryer; max moisture 0.02 % | Celanese also states 130–140°C for 3–4 h and a dew point of −30°C or lower |
| Melt temperature | 310–340°C (590–644°F); optimum 330°C | Celanese injection data sheet |
| Mold temperature | 140–160°C (284–320°F); optimum 150°C | Celanese recommends at least 135°C for full crystallinity |
| Residence time | Optimum 5–10 min; maximum 20 min | Celanese injection data sheet |
| Automotive approvals listed | BMW GS93016; Ford WSL-M4D807-A; GM GMW17521P-PPS-GF40; Mercedes-Benz DBL5420; Stellantis MS.50152; Stellantis-Chrysler MS-DB-570 (CPN-3502 black, CPN-4241 natural); also Bosch, Dongfeng, Hyundai (tentative), Nissan, Renault and VW entries | As listed on the sheet; approvals are color specific |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Mold temperatures of 140–160°C need oil or electric mold heating rather than water. Check your press and tool before planning a trial.
Celanese’s Chemille record for 1140L4 lists drinking water approvals (NSF 61, WRAS, KTW, EN 16421), and Celanese also sells 1140L4 DW, developed for drinking water. Ask for the certificate for your exact grade and color.
Grades to ask about instead of Fortron 1140L4
The closest option from another producer is Syensqo’s Ryton R-4, another 40% glass fiber PPS. Celanese also makes 1140L4 variants with the same glass level. Neither Celanese nor Syensqo publishes melt flow for these grades, so flow cannot be compared from the sheets. None is a drop-in replacement. If your part, drawing or customer approval names Fortron 1140L4, any change needs that approval and a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Ryton R-4 | Syensqo | Not published on the sheet | Specific gravity 1.69 (ASTM D792) | Tensile strength 150 MPa (ISO 527-2); flexural modulus 14,000 MPa (ISO 178); HDT 265°C at 1.8 MPa (ASTM D648, unannealed); UL 94 V-0 and 5VA at 1.6 mm | Ask about. Same polymer and glass level. Lower tensile and flexural strength on the ISO rows, slightly higher density. The Ryton sheet is mostly ASTM and lists no processing data. Syensqo’s R-4 data sheet lists North America, but its current R-4 product page lists Asia Pacific as the only region, so confirm the regional version and supply first. See our Ryton R-4 page. Quote this alternative › |
| Fortron 1140L4 HR | Celanese | Not published on the sheet | 1.65 g/cm³ (ISO 1183) | Tensile modulus 15,600 MPa; tensile stress at break 200 MPa (ISO 527); notched Izod 8.5 kJ/m² (ISO 180/1A); HDT 270°C at 1.8 MPa; V-0 at 0.38 mm | Check. Same producer and glass level, with improved hydrolysis resistance (worth asking about if parts see hot water or coolant). Slightly stiffer, slightly lower notched Izod. Listed as a new product, so confirm supply and approvals. Quote this alternative › |
| Fortron 1140L4 DW | Celanese | Not published on the sheet | 1.65 g/cm³ (ISO 1183) | Tensile modulus 14,700 MPa; tensile stress at break 195 MPa; HDT 270°C at 1.8 MPa; V-0 at 0.38 and 1.5 mm, 5VA at 3 mm | Check. Same published mechanical values as 1140L4; Celanese says it was developed for drinking water applications. Ask for the drinking water certificate for your color. Quote this alternative › |
From each producer’s published data; typical values, confirm on the current producer data sheet. Brand owners and grade names change.
Typical uses for Fortron 1140L4
Celanese names these uses for Fortron 1140L4:
- Electrical and electronic parts such as bobbins, lamp housings and brush holders
- Automotive heaters, pumps, valves and fuel rails
- Microwave oven rings
- Distillation column packings and other parts that need strength with resistance to aggressive chemicals
What to check before you switch
- Owner check: Fortron is a Celanese brand, made by Fortron Industries (Celanese and Kureha). Kureha’s own PPS compounds are sold by Daicel as Durafide. See the brand ownership tracker.
- Compare like with like. Celanese data is ISO; Syensqo’s Ryton R-4 sheet is mostly ASTM. Compare ISO rows only, and do not compare ISO 75 HDT with ASTM D648 HDT.
- Pick the right version. 1140L4, 1140L4 HR and 1140L4 DW are separate grades. Approvals, drinking water certificates and UL files follow the exact grade and color.
- Hot molds. Celanese asks for a 140–160°C mold and at least 135°C for full crystallinity. Colder molds can leave parts that keep changing size in service. See the PPS buying guide.
- Dry it. Celanese asks for 130°C and 0.02% maximum moisture in a dehumidified dryer, and says to keep it in the dryer until use, for no more than 60 h. See our resin drying guide.
- Flash. PPS melt is very thin. Tools and vents need to be sized for it, especially when you move from another PPS grade.
- UL listing. Ask for the yellow card for your color and wall thickness. See UL 94 flame ratings.
- Run a trial lot and check fill, flash, shrinkage, weld lines and dimensions before you switch production. See PPS GF40 properties for typical ranges.
Need a second source for Fortron 1140L4?
Tell us why. A polymer chemist will reply with one to three alternatives, what differs, and what to test before you switch. Free.
Watch Fortron 1140L4
Get a short email only if Fortron 1140L4 changes owner, is renamed or discontinued, goes on allocation, gets a price increase, or when a matching surplus lot comes in. Free. Add your other grades too.
Buying Fortron 1140L4: price, lead time and lot size
- Lot size. From one gaylord to a railcar. See gaylord, LTL and truckload for typical weights per box.
- Where it ships from. 22+ partner warehouse locations. Lead time is confirmed with your quote. Material already in a partner warehouse usually moves sooner than a grade that has to come from the producer.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, color code, which 1140L4 version you need, ship-to region, and whether you need Fortron 1140L4 itself or can accept a matched alternative. See how resin is priced and the monthly market update.
- Paperwork. Supplier COA on every prime lot (what a COA shows). Ask for the producer’s UL file, drinking water certificate or compliance letters if your part needs them. Payment terms are confirmed with your quote.
- Trying an alternative? Samples (~50 lb) are available upon credit approval, or start with one gaylord as a trial lot. Custom compounding and color matching are available.
- If Fortron 1140L4 itself is not available. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade and color code, your annual volume and ship-to location. A polymer chemist reviews every request before we quote. For several grades at once, use the resin RFQ template.
Trade names belong to their owners. ResinBridge is not affiliated with these producers; grade names are used only to identify the material. Data reflects published sheets as of November 2026.
Sources
- Celanese Fortron 1140L4 technical data sheet (SI units), revised 2026-09-08 (PDF)
- Celanese Fortron 1140L4 technical data sheet (U.S. units), revised 2026-09-08 (PDF)
- Celanese Fortron 1140L4 injection molding data sheet, revised 2026-09-08 (PDF)
- Celanese Chemille grade page for Fortron 1140L4: description, colors, regions, certifications
- Celanese Fortron 1140L4 HR technical data sheet (SI), revised 2026-09-08 (PDF)
- Celanese Chemille grade page for Fortron 1140L4 HR (regional status: new product)
- Celanese Fortron 1140L4 DW technical data sheet (SI), revised 2026-09-08 (PDF)
- Syensqo Ryton R-4 technical data sheet, revised 9/29/2023 (PDF linked from Syensqo’s R-4 product page)
- Syensqo Ryton R-4 product page: region of availability
Common questions
What is Fortron 1140L4?
Fortron 1140L4 is Celanese’s polyphenylene sulfide (PPS) with 40% glass fiber, for injection molding. Celanese describes it as the strongest and toughest grade in the range, with heat and chemical resistance, good electrical properties and inherent flame retardancy. It contains a release agent.
Who makes Fortron 1140L4?
Celanese. Fortron PPS is made by Fortron Industries, a 50/50 venture of Celanese and Kureha, and sold by Celanese.
What is the heat deflection temperature of Fortron 1140L4?
270°C / 518°F at 1.8 MPa and 215°C at 8 MPa (ISO 75). The melting point is 280°C and the glass transition is 90°C (ISO 11357). These are typical values; confirm them on the current producer data sheet.
What is the UL 94 rating of Fortron 1140L4?
The sheet lists V-0 at 1.5 mm and at 0.38 mm, and 5VA at 3 mm, with UL recognition. Oxygen index is 47%. Ask for the yellow card for your exact color and thickness before you order.
How do you process Fortron 1140L4?
Celanese recommends drying at 130°C for 2–4 h in a dehumidified dryer to 0.02% maximum moisture, a melt of 310–340°C (optimum 330°C), and a mold of 140–160°C (optimum 150°C). Celanese asks for at least 135°C at the mold for full crystallinity.
What is the density of Fortron 1140L4?
1,650 kg/m³ (1.65 g/cm³, ISO 1183). Syensqo’s Ryton R-4, another 40% glass PPS, lists a specific gravity of 1.69 (ASTM D792).
What is equivalent to Fortron 1140L4?
No grade is a drop-in replacement. The closest grade from another producer to ask about is Syensqo’s Ryton R-4, also a 40% glass PPS, which shows lower tensile strength on the ISO test (150 vs 195 MPa) and slightly higher density. Celanese’s own 1140L4 HR and 1140L4 DW are closer, but each is a separate grade with its own approvals. Compare data sheets, run a trial and get approval if your part names Fortron 1140L4.
Can ResinBridge quote Fortron 1140L4?
Yes. Send the grade, color code and volume. A polymer chemist reviews every request. We quote Fortron 1140L4 where our supply partners can source it, or a matched alternative, and say which one. Orders start at one gaylord; U.S. and Canada only.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
Need Fortron 1140L4 or an equivalent?
A polymer chemist reviews every request, then matches your grade or finds a matched alternative 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
Quote Fortron 1140L4 or a matched alternative
A polymer chemist checks the data sheet and tells you exactly what you would get before you order.
Request a QuoteNot sure which grade fits your part?
Send the grade you run now, or describe the part.