Ultramid A3WG6: specs and equivalent grades
Ultramid A3WG6 is a PA66 GF30 from BASF. Published specs, grades from other producers to ask about, and how to buy it from one gaylord to a railcar.
Updated October 28, 2026
Request a QuoteThe short answer
Ultramid A3WG6 is a polyamide 66, 30% glass fiber (PA66-GF30), heat ageing resistant, from BASF. The data sheet lists viscosity number (dry) as 145 cm³/g (ISO 307, 1157, 1628). Density: 1.36 g/cm³ (1360 kg/m³). Grades from other producers to ask about include Vydyne R530H NAT. They are not identical, so compare the data sheets and run a trial before switching.
Buying Ultramid A3WG6: from one gaylord to a railcar · supplier COA on every prime lot · Ultramid A3WG6 or a qualified equivalent, named on your quote · a polymer chemist reviews every request · 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.
Ultramid A3WG6 specs from the data sheet
Typical values from the producer’s published data sheet (Ultramid A3WG6 (uncoloured; BASF does not use an NC010-style code)). 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) | BASF | Data sheet |
| Polymer | Polyamide 66, 30% glass fiber (PA66-GF30), heat ageing resistant | |
| Process | Injection molding | |
| Viscosity number (dry) | 145 cm³/g (US-unit sheet: 4010 in³/lb) | ISO 307, 1157, 1628 |
| Melt volume-flow rate (MVR) | 30 cm³/10 min at 275 °C / 5 kg (same units on the US-unit sheet) | ISO 1133 |
| Density | 1.36 g/cm³ (1360 kg/m³) | ISO 1183 |
| Tensile modulus, dry / conditioned | 10,000 / 7200 MPa (1.45 million / 1.04 million psi) | ISO 527 |
| Tensile stress at break, dry / conditioned | 190 / 130 MPa (27,600 / 18,900 psi) | ISO 527 |
| Flexural modulus, dry / conditioned | 8600 / 6500 MPa (about 1.25 million / 943,000 psi, converted; from the 04/2018 BASF sheet) | ISO 178 |
| Charpy notched impact, 23 °C, dry / conditioned | 12 / 19 kJ/m² (5.71 / 9.04 ft-lb/in²) | ISO 179/1eA |
| HDT at 1.8 MPa, dry | 250 °C (482 °F) | ISO 75-1/-2 |
| HDT at 0.45 MPa, dry | 250 °C (482 °F, converted; from the 04/2018 BASF sheet) | ISO 75-1/-2 |
| Melting temperature (10 °C/min) | 260 °C (500 °F) | ISO 11357-1/-3 |
| Flammability | HB at 1.5 mm nominal (1.47 mm / 0.0579 in tested) and at 0.7 mm (0.028 in), UL recognition listed as yes | UL 94 |
| Moisture state | Values given dry as molded / conditioned; humidity absorption 1.7 %, water absorption 5.5 % (saturation) | Similar to ISO 62 |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Grades to ask about instead of Ultramid A3WG6
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 Ultramid A3WG6, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Vydyne R530H NAT | Ascend Performance Materials | Not published (no MFR, MVR or viscosity number on the sheet) | 1.37 g/cm³ | Tensile modulus 10,000 / 7400 MPa (1.45 million / 1.07 million psi) dry / conditioned; HDT 1.8 MPa 250 °C (482 °F); Charpy notched 23 °C 11 / 13 kJ/m² | PA66 with 30% glass, heat stabilized and lubricated per Ascend, with similar published stiffness and HDT. Ascend lists its own OEM specs and agency ratings (including FDA 21 CFR 177.1500 and EU 10/2011), which differ from BASF's. Not a drop-in replacement; confirm approvals and run trials. |
From each producer’s published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Ultramid A3WG6
BASF describes A3WG6 as a glass fibre reinforced, heat ageing resistant injection molding grade for machinery components and housings that need high stiffness and dimensional stability, such as lamp socket housings, cooling fans, insulating profiles for aluminium window frames and various automotive powertrain parts. BASF notes that A3EG6 is its preferred grade for electrically insulating parts.
When PA66 GF30 is worth it over PA6 GF30
A3WG6 is the nylon 66 version. Nylon 66 melts at a higher temperature than nylon 6 (BASF lists 260 °C for A3WG6, against 220 °C for the nylon 6 grade B3WG6), so PA66 GF30 is usually the pick for parts near engines, motors and other sustained heat. If the part runs cooler and surface finish or easier molding matters more, a PA6 GF30 such as Ultramid B3WG6 may do the job. See PA66 GF30 properties.
What to check before you switch
- Check OEM material specifications and any UL file numbers on the print; approvals are grade and producer specific.
- Dry the resin to the producer's moisture limit before molding; glass-filled nylon properties and surface finish suffer if it is wet.
- Compare shrinkage and warpage on the real tool; glass orientation makes flow and cross-flow shrinkage differ between brands.
- Confirm color and code: this data is for uncoloured material, and black versions (for example BK00564) carry their own data.
- Ask about the heat stabilizer type and any lubricant; they affect long-term heat ageing, electrical use and color.
Buying Ultramid A3WG6 or an equivalent
Send us the grade name, your annual volume and ship-to location. A polymer chemist checks the data sheet and we quote Ultramid A3WG6 where we can source it, or a qualified equivalent, saying clearly which one you would get. Orders start at one gaylord. For background on this resin family see Glass-filled nylon grades and buying guide; 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
- BASF Ultramid A3WG6 data sheet, SI units (Material Data Center data created 2026-10-28, hosted by Albis)
- BASF Ultramid A3WG6 data sheet, US units (Material Data Center data, hosted by Albis)
- BASF SE Product Information, Ultramid A3WG6, 04/2018 (copy hosted by Picoplast; used for flexural modulus and HDT at 0.45 MPa)
- Celanese Zytel 70G30HSL NC010 TDS (SI)
- Celanese materials database (Chemille) record for Zytel 70G30HSL NC010, incl. regional status
- Ascend Vydyne R530H NAT record (SI units)
- Ascend Vydyne R530H NAT record (US units)
Common questions
What is Ultramid A3WG6?
Ultramid A3WG6 is BASF's 30% glass fiber reinforced, heat ageing resistant nylon 66 (PA66-GF30) for injection molding, used for stiff, dimensionally stable parts such as housings, fans and automotive powertrain parts.
What is the melt flow or viscosity of Ultramid A3WG6?
BASF data shows a viscosity number of 145 cm³/g (ISO 307) and an MVR of 30 cm³/10 min at 275 °C under 5 kg (ISO 1133). Nylon is usually specified by viscosity number rather than MFR.
What is equivalent to Ultramid A3WG6?
Grades with similar published specs include Ascend Vydyne R530H NAT, a heat stabilized PA66 with 30% glass. Celanese Zytel 70G30HSL is similar but is listed as discontinued in the Americas. Additive packages and approvals differ, so none is a drop-in replacement.
Is Ultramid A3WG6 food contact compliant or UL listed?
The BASF data does not state food contact status, so ask BASF. For flammability, it lists UL 94 HB at 1.5 mm nominal and at 0.7 mm, with UL recognition listed as yes.
Can ResinBridge quote Ultramid A3WG6?
Yes. Send the grade name and volume. A polymer chemist checks it and we quote the grade where we can source it, or a qualified equivalent, and say which. Orders start at one gaylord; U.S. and Canada only.
Need Ultramid A3WG6 or an equivalent?
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
Quote Ultramid A3WG6 or a qualified equivalent
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?
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