Valox 420: specs and equivalent grades
30% glass-filled PBT injection molding grade sold under the Valox name, now from NexPoint Materials in the Americas and Europe. Published data, grades from other producers to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Valox 420 is a 30% glass fiber reinforced polybutylene terephthalate (PBT GF30) for injection molding, described on its data sheet as strong, stiff and dimensionally stable with high heat resistance. In the Americas and Europe, Valox is now sold by NexPoint Materials, the former SABIC engineering thermoplastics business that Mutares bought in a deal that closed August 3, 2026; NexPoint says grades, plants and formulas stay the same. SABIC’s Americas data sheet lists specific gravity 1.53 (ASTM D792), melt flow 17 g/10 min at 250°C / 482°F, 2.16 kg (ISO 1133) and HDT 203°C / 397°F at 1.8 MPa (264 psi; ASTM D648, 3.2 mm). Grades from other producers to ask about include Crastin SK605 NC010, Ultradur B4300 G6 and Pocan B3235. They are not identical, so compare the data sheets and run a trial before switching.
Also written as: VALOX 420 resin; VALOX* 420 on older SABIC Innovative Plastics sheets. VALOX 420SE0 (flame retardant) and VALOX 420HP are separate grades with their own data sheets. Quote the full code from your drawing or bag label; color and additive suffixes change the grade.
Buying Valox 420: 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.
Valox 420 specs from the data sheet
Typical values from SABIC’s Americas data sheet for Valox 420 as published on UL Prospector (form TDS-4725, last updated March 5, 2013). UL Prospector still lists the Americas grade as Commercial: Active. Typical values are not specifications; 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) | NexPoint Materials in the Americas and Europe (the former SABIC engineering thermoplastics business, owned by Mutares). The data sheet is still SABIC-branded. | NexPoint transition hub; SABIC data sheet |
| Polymer | PBT, 30% glass fiber reinforced | Filler content 30%, ASTM D229 |
| Process | Injection molding | |
| Availability | North America and Latin America | UL Prospector listing (Americas grade) |
| Specific gravity | 1.53 | ASTM D792 |
| Melt flow | MFR 17 g/10 min; MVR 13.0 cm³/10 min | 250°C / 482°F, 2.16 kg, ISO 1133 |
| Tensile strength, yield and break | 120 MPa (17,400 psi) | ASTM D638, Type I, 5 mm/min |
| Tensile elongation at break | 2.7% | ASTM D638 |
| Tensile modulus | 9,300 MPa (1,350,000 psi) | ASTM D638, 5 mm/min |
| Flexural modulus | 7,580 MPa (1,100,000 psi) | ASTM D790, 50 mm span |
| Flexural strength at yield | 195 MPa (28,300 psi) | ASTM D790, 50 mm span |
| Notched Izod impact | 85 J/m (1.6 ft-lb/in) at 23°C / 73°F; 80 J/m (1.5 ft-lb/in) at -30°C / -22°F | ASTM D256 |
| HDT at 1.8 MPa (264 psi) | 203°C / 397°F (3.2 mm); 207°C / 405°F (6.4 mm) | ASTM D648, unannealed |
| HDT at 0.45 MPa (66 psi) | 220°C / 428°F (3.2 mm) | ASTM D648, unannealed |
| Rockwell hardness | R118 | ASTM D785 |
| Molding shrinkage | 0.3–0.7% in flow; 0.5–1.0% across flow | SABIC internal method, tensile bar |
| Water absorption, 24 h | 0.09% | ASTM D570 |
| Relative thermal index | 140°C / 284°F electrical, mechanical with impact and mechanical without impact | UL 746 |
| Flame rating | HB at 0.84 mm | UL 94 |
| Comparative tracking index | 300 V | IEC 60112 |
| Automotive specifications on the sheet | Chrysler MS-DB400 (CPN2512 black; CPN3199), Ford ESE-M4D341-A1, GM GMP.PBTP.010 | Data sheet (2013); confirm current listings with the producer |
| Drying | 121°C / 250°F for 3–4 h, 12 h maximum; 0.02% maximum moisture | Data sheet, injection section |
| Melt temperature | 249–266°C / 480–510°F | Data sheet, injection section |
| Mold temperature | 66–88°C / 150–190°F | Data sheet, injection section |
| Food contact | No food-contact statement on the data sheet | Ask for the producer’s regulatory letter |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Dry to the 0.02% maximum moisture on the sheet before molding. PBT hydrolyzes when it is molded wet, which costs strength.
Grades to ask about instead of Valox 420
These grades from other producers have similar published specs. None is a drop-in replacement: additive packages, flow at molding shear rates, color and approvals differ. If your part, drawing or customer approval names Valox 420, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Crastin SK605 NC010 | Celanese | MFR 10 g/10 min; MVR 7 cm³/10 min (250°C / 482°F, 2.16 kg, ISO 1133) | 1.53 g/cm³ (ISO 1183) | HDT 205°C / 401°F at 1.8 MPa (ISO 75); tensile modulus 10,000 MPa; stress at break 140 MPa (ISO 527) | Close match. Same glass level and density, lubricated with a release agent. Lower flow at the same condition (MFR 10 vs 17 g/10 min). RTI 130°C vs 140°C for Valox 420; CTI 400 vs 300. Celanese data is ISO and the Valox sheet is mostly ASTM, so strength and modulus do not compare directly. Quote this alternative › |
| Ultradur B4300 G6 | BASF | MVR 11 cm³/10 min (250°C / 482°F, 2.16 kg, ISO 1133) | 1.53 g/cm³ (ISO 1183) | HDT 205°C at 1.8 MPa (ISO 75); tensile modulus 9,800 MPa; notched Izod 100 J/m (ASTM D256) | Close match. Standard PBT GF30 from BASF, offered natural and black, with slightly lower flow than Valox 420 (MVR 11 vs 13 at the same condition). BASF lists a 60–100°C mold and up to 0.04% moisture, looser than SABIC’s 0.02%. Quote this alternative › |
| Pocan B3235 | Envalior | MVR 17 cm³/10 min (260°C / 500°F, 2.16 kg, ISO 1133) | 1.53 g/cm³ (ISO 1183) | HDT 210°C / 410°F at 1.8 MPa (ISO 75); tensile modulus 9,800 MPa; stress at break 145 MPa | Partial match. General-purpose PBT GF30 from Envalior. Flow is measured at 260°C, not 250°C, so the MVR does not compare directly. Envalior recommends an 80–100°C mold and drying at 120°C for 4–8 h. Quote this alternative › |
From each producer’s published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Valox 420
From SABIC’s Valox 420 data sheet:
- Appliance handles and other appliance components
- Spotlights
- Electric motors
- Connectors
What to check before you switch
- Confirm who supplies your Valox 420 now. In the Americas and Europe it comes from NexPoint Materials; older approvals, COAs and UL files may still say SABIC or SABIC Innovative Plastics. Ask for the current data sheet and Yellow Card with your quote.
- Valox 420 is rated UL 94 HB at 0.84 mm. If the part needs a V rating, ask about the flame-retardant 420SE0, which is a different grade.
- The Americas sheet lists Chrysler, Ford and GM material specifications. If your part is on one of them, an alternative needs its own listing or the OEM’s approval.
- Compare melt flow at the same condition: Crastin and Ultradur report MVR at 250°C / 2.16 kg, Pocan at 260°C.
- Glass-filled PBT shrinks less along flow than across it (0.3–0.7% vs 0.5–1.0% on the Valox sheet). Check warp and critical dimensions on first articles from any alternative.
- Ask for the producer’s food-contact or regulatory letter for the exact grade if the part needs one.
- Run a trial lot and check shrinkage, cycle time and appearance before you switch production.
Buying Valox 420: 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. Material already in a partner warehouse usually moves sooner than a grade that has to come from the producer; your quote says which applies.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, color, ship-to region, and whether you need Valox 420 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 regulatory letter or UL file if your part needs them.
- Trying an alternative? Start with one gaylord as a trial lot, molded and checked before you commit a full release.
- If Valox 420 itself is not available. Some branded grades are sold only through the producer’s own channels or go on allocation. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade code, your annual volume and ship-to location. A polymer chemist checks it before we quote; we have been in the resin business for 30+ years. 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 October 2026.
Sources
- SABIC VALOX 420 Americas technical data sheet, UL Prospector form TDS-4725 (PDF)
- UL Prospector listing: VALOX Resin 420, Americas (status and availability)
- NexPoint Materials transition hub
- Celanese Crastin SK605 NC010 data sheet, revised July 13, 2024 (PDF copy)
- BASF Ultradur B 4300 G6 product information, 09/2026 (PDF)
- Envalior Pocan B3235 data sheet from Material Data Center (PDF)
Common questions
What is Valox 420?
Valox 420 is a 30% glass fiber reinforced PBT for injection molding. In the Americas and Europe it is now sold by NexPoint Materials, the former SABIC engineering thermoplastics business; the data sheets are still SABIC-branded.
What is the HDT of Valox 420?
203°C / 397°F at 1.8 MPa (264 psi) on a 3.2 mm bar, unannealed, ASTM D648, per SABIC’s Americas data sheet. At 0.45 MPa (66 psi) it is 220°C / 428°F.
What is equivalent to Valox 420?
Grades from other producers to ask about include Crastin SK605 NC010, Ultradur B4300 G6 and Pocan B3235. None is identical; compare data sheets and run a trial, and get approval if your part names Valox 420.
How do you dry Valox 420?
SABIC’s data sheet gives 121°C / 250°F for 3–4 hours, 12 hours maximum, to 0.02% moisture or less.
Can ResinBridge supply Valox 420?
We quote Valox 420 when our supply partners can source it. If they cannot, we say so up front and quote a matched alternative, named on the quote with its data sheet, so you can decide whether to trial it.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
Need Valox 420 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 Valox 420 or a matched alternative
A polymer chemist checks the data sheet and tells you exactly what you would get before you order.
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