Impact-resistant polyamide Grodnamid PA6-L-U2 (GOST 11262-80)

Description

Grodnamid PA6-L-U2 is an injection-molding grade of impact-resistant polyamide 6 produced to Soviet/post-Soviet-era standards. Grade designation: L — injection-molding, U2 — level-2 impact modification. It is produced to GOST 11262-80 (mechanical properties) and OST 6-11-498-79 (glass-filled and modified polyamides), which makes the grade directly compatible with Soviet-style design documentation still in force at many machine-building, defense-industry and transport-sector enterprises in the CIS region.

Key niche: manufacturing products to legacy GOST/OST standards, where switching to EN/ISO alternatives would require recertification, strength recalculation and updates to drawings and design documentation. Manufacturers working with government defense orders, the railway industry and heavy machine building, where documentation references GOST 11262 or OST 6-11-498, can continue using Grodnamid PA6-L-U2 without changing their specifications.

Typical parameters (impact-resistant PA6 per GOST 11262): density 1.13 g/cm³, yield strength 50–60 MPa (dry specimen), elongation at break 50–150 %, notched impact strength 6–10 kJ/m² (per GOST 4647), Vicat softening temperature 195–210 °C, continuous service temperature up to 80 °C (dry). Water absorption typical for PA6 — ~9 % at saturation.

When to choose Grodnamid PA6-L-U2

• Current design documentation references GOST 11262-80 or OST 6-11-498-79 — there is no need or option to switch to an EN/ISO alternative
• Supplies for government and defense orders — where confirmation of origin and compliance with legacy standards is required
• Repair and servicing of Soviet/Russian-made equipment — parts made to the original documentation without changing the material
• Budget applications for serial injection-molded parts without critical requirements for moisture resistance, heat resistance or FR

Key characteristics

• Compliance with GOST 11262-80 (plastics — tensile test method) and OST 6-11-498-79 (modified polyamides)
• Stiffness, strength and impact strength within the standard-specified ranges
• Easy injection-molding processing on standard PA6 equipment
• Consistent batch quality (factory production)
• Available on request with QC inspection reports and certificates of conformity

Alternatives from the MW range (for new designs)

For new projects that can be designed to EN/ISO specifications, we recommend considering modern equivalents from our range with an extended set of properties and UL/IEC certifications:

• Examid® PA6 HI — impact-modified grade per EN/ISO, better stability over a wide temperature range
• Promyde® B33 P2 HI — extrusion high-impact grade with heat stabilization
• Promyde® B30 P MID — injection-molding PA6 with medium impact modification and a lubricant
• Examid® PA610 series — for applications with critical moisture-resistance requirements (half the water absorption vs PA6)

Application areas

• Machine building to legacy documentation: parts for heavy machine tools, metalworking lines and pumping equipment
• Transport and railways: non-structural parts of electrical equipment for railcars and locomotives, interior elements, cable insulators
• Defense industry and special equipment: housing parts, brackets, insulating elements for products under government defense orders with GOST documentation
• Agricultural machinery: parts for combines, tractors and trailed equipment — housings, bushings, brackets
• Repair of Soviet-made equipment: restoring machinery to working order using the original molding tooling and material specification

Grodnamid is a trademark of Grodno Azot OJSC (Belarus). Supply is possible either as the original grade or with substitution by an equivalent from the Material Wizard range, depending on customer requirements. The listed values are measured by in-house methods close to GOST 11262-80, OST 6-11-498-79 and ISO. This information is for reference only and is not an official batch data sheet. Please request the TDS and a certificate of conformity for a specific batch before industrial use.