Ultramid B3EG6: specs and equivalent grades
BASF 30% glass fiber reinforced polyamide 6 (nylon 6) for industrial and electrically insulating parts. Published data, grades from other producers to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Ultramid B3EG6 is BASF’s 30% glass fiber reinforced polyamide 6 (PA6-GF30) injection molding grade for industrial articles and electrically insulating parts. Published melt volume rate is 35 cm³/10 min, measured at 275°C / 527°F, 5 kg, ISO 1133, and density is 1.36 g/cm³ (ISO 1183), per BASF’s product information dated 09/2026. Tensile modulus is 9,500 MPa dry and 6,200 MPa conditioned (ISO 527), and HDT is 210°C / 410°F at 1.8 MPa (ISO 75). Grades from other producers to ask about include Durethan BKV30 and Vydyne B 30 GF NT KW2. They are not identical, so compare the data sheets and run a trial before switching.
Also written as: B3EG6, Ultramid B3 EG6, ULTRAMID® B3EG6. BASF also sells colored and special versions under longer codes. Quote the full code from your drawing or bag label; color and additive suffixes change the grade.
Buying Ultramid B3EG6: 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.
Ultramid B3EG6 specs from the data sheet
Typical values for uncolored product at 23°C from BASF’s product information for Ultramid B3EG6 (09/2026). Dry / conditioned values are shown where BASF gives both. 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 | BASF product information, 09/2026 |
| Polymer | Polyamide 6 (nylon 6), 30% glass fiber (PA6-GF30) | BASF polymer abbreviation |
| Process | Injection molding | |
| Melt flow | MVR 35 cm³/10 min | 275°C / 527°F, 5 kg, ISO 1133 |
| Viscosity number | 140 cm³/g | ISO 307, 1157, 1628 (0.5% in 96% sulfuric acid) |
| Density | 1.36 g/cm³ (1,360 kg/m³) | ISO 1183 |
| Tensile modulus, dry / conditioned | 9,500 / 6,200 MPa (1,380,000 / 899,000 psi) | ISO 527-1/-2 |
| Stress at break, dry / conditioned | 185 / 115 MPa (26,800 / 16,700 psi) | ISO 527-1/-2 |
| Strain at break, dry / conditioned | 3.5 / 8 % | ISO 527-1/-2 |
| Flexural modulus, dry / conditioned | 8,600 / 5,000 MPa | ISO 178 |
| Flexural strength, dry / conditioned | 270 / 180 MPa | ISO 178 |
| Notched Charpy impact, dry / conditioned | 23°C: 15 / 30 kJ/m²; −30°C: 11 kJ/m² dry | ISO 179/1eA |
| Notched Izod impact, 23°C, dry / conditioned | 15.5 / 20 kJ/m² (ISO 180/A); 150 / 300 J/m (ASTM D256) | ISO 180/A; ASTM D256 |
| HDT at 1.8 MPa / 0.45 MPa | 210°C / 410°F; 220°C / 428°F | ISO 75-1/-2 |
| Melting temperature | 220°C / 428°F | ISO 11357-1/-3, DSC |
| Temperature index (tensile strength, 50% loss) | 135°C / 275°F at 20,000 h; 165°C / 329°F at 5,000 h | IEC 60216 |
| Max. service temperature, short cycle | 200°C / 392°F | BASF |
| Mold shrinkage, parallel / normal | 0.25 % / 0.70 % | ISO 294-4 |
| Moisture absorption: 23°C / 50% RH; saturation in water | 1.9–2.3 %; 6.3–6.9 % | Similar to ISO 62 |
| Flammability | UL 94 HB at 1.57 mm (Yellow Card available) and at 3.05 mm; passes ISO 3795 / FMVSS 302 at 1 mm and up | IEC 60695-11-10 |
| Electrical | CTI 575 (conditioned, test liquid A); electric strength 39 / 35 kV/mm dry / conditioned | IEC 60112; IEC 60243-1 |
| Halogen content | < 50 mg/kg (uncolored; BASF notes colored versions may be higher) | Similar to DIN 51408-2 |
| Drying | 80°C / 176°F for 4 h (pre-drying) | BASF product information |
| Melt temperature | 270–290°C (518–554°F); recommended 280°C / 536°F | BASF product information |
| Mold temperature | 80–90°C (176–194°F); recommended 80°C / 176°F | BASF product information |
| Packaging forms | Bags and octagonal bulk containers (IBC) with liner; road or rail silo by agreement | BASF product information |
| Food contact | BASF’s product information makes no food-contact statement. Ask for the producer’s regulatory letter for the exact grade and color. |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
PA6-GF30 melts about 40°C lower than PA66-GF30 (220°C vs 260°C on BASF’s sheets) and its HDT at 1.8 MPa is lower (210°C for B3EG6 vs 250°C for Ultramid A3EG6). BASF’s heat aging stabilized PA6-GF30 is Ultramid B3WG6.
Grades to ask about instead of Ultramid B3EG6
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 B3EG6, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Durethan BKV30 | Envalior (former LANXESS line) | MVR 14 cm³/10 min (260°C / 500°F, 5 kg, ISO 1133); VN 140 cm³/g | 1.36 g/cm³ (ISO 1183) | Tensile modulus 9,800 / 6,100 MPa dry / conditioned (ISO 527); stress at break 170 / 105 MPa; HDT 200°C at 1.8 MPa (ISO 75); CTI 600 | Close match. 30% glass PA6 for injection molding with the same density and viscosity number. MVR is measured at 260°C, not 275°C, so the numbers do not compare directly. Slightly lower strength and HDT on its sheet. Values from Envalior data hosted by Albis (Material Data Center). Quote this alternative › |
| Vydyne B 30 GF NT KW2 | Ascend Performance Materials | Not published | 1.35 g/cm³ (ISO 1183) | Tensile modulus 9,500 MPa dry (ISO 527-2); stress at break 180 MPa dry; HDT 210°C at 1.8 MPa (ISO 75-2/A); CTI 600; no conditioned values published | Partial match. Standard-flow, organic heat stabilized, lubricated PA6 with 30% glass. Dry stiffness and HDT match B3EG6, but it adds a heat stabilizer that B3EG6’s sheet does not describe, and Ascend publishes no conditioned data. Quote this alternative › |
From each producer’s published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Ultramid B3EG6
From BASF’s product information for Ultramid B3EG6:
- Industrial articles (injection-molded technical parts)
- Electrically insulating parts
- BASF says B3EG6 can also be supplied as mass-balance versions (BMBcert and CCycled) with unchanged properties
What to check before you switch
- Check nylon type on the drawing. B3EG6 is PA6; A3EG6 is PA66 with a higher melting point and HDT. Do not swap PA6 and PA66 without approval.
- Heat aging: B3EG6 is not described as heat stabilized. For continuous heat, ask about BASF’s B3WG6 or a heat-stabilized alternative such as Vydyne B 30 GF NT KW2.
- Durethan BKV30 lists MVR at 260°C / 5 kg; BASF lists B3EG6 at 275°C / 5 kg. Compare flow by trial, not by the two numbers.
- For electrical parts, compare CTI and UL 94 at your wall thickness on the current Yellow Card for the exact color code.
- Name the full code on the RFQ. LS, EQ and SI versions and black color codes are separate grades.
- Dry before molding (BASF lists 80°C for 4 h). See the resin drying guide.
- Run a trial lot and check shrinkage, warpage, cycle time and surface finish before you switch production.
Buying Ultramid B3EG6: 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 Ultramid B3EG6 itself or can accept a matched alternative. See how resin is priced, nylon price per pound 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 Ultramid B3EG6 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
- BASF Ultramid B3EG6 product information, 09/2026 (PDF)
- Envalior Durethan BKV30 data sheet, Material Data Center via Albis (PDF)
- Ascend Vydyne B 30 GF NT KW2 product record (SI units)
Common questions
What is Ultramid B3EG6?
Ultramid B3EG6 is BASF’s 30% glass fiber reinforced polyamide 6 (PA6-GF30) injection molding grade for industrial articles and electrically insulating parts.
What is the melt flow of Ultramid B3EG6?
MVR 35 cm³/10 min, measured at 275°C / 527°F, 5 kg, ISO 1133, per BASF’s product information (09/2026). The viscosity number is 140 cm³/g (ISO 307).
What is equivalent to Ultramid B3EG6?
Grades from other producers to ask about include Durethan BKV30 and Vydyne B 30 GF NT KW2. None is identical; compare data sheets and run a trial, and get approval if your part names Ultramid B3EG6.
What is the difference between Ultramid B3EG6 and A3EG6?
Both are BASF 30% glass nylons with density 1.36 g/cm³. B3EG6 is PA6 (melting point 220°C, HDT 210°C at 1.8 MPa); A3EG6 is PA66 (melting point 260°C, HDT 250°C).
Can ResinBridge supply Ultramid B3EG6?
We quote Ultramid B3EG6 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 Ultramid B3EG6 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 Ultramid B3EG6 or a matched alternative
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