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VW_50134_11_EN

PA6 for Finished Parts Outside the Vehicle Interior Material Requirements

Scope

This Standard defines the material requirements for glass fiber-reinforced and/or mineral-reinforced PA6 in the engine, chassis, gearbox, and body areas (without paint).Description

The description consists of the following elements:

PA6 as per VW 50134 + >grade< + >area of application<

If none of the areas of application in Section 6 apply, only the grade is specified.

Example for a part made of polyamide 6 with 30% glass fiber for use as an intake manifold:

PA6 as per VW 50134 – PA6-6-A – intake

Requirements General requirements

Approval of first supply and changes as per Volkswagen Standard VW 01155.Avoidance of hazardous substances as per VW 91101.

The tests must be carried out on finished part specimens. Depending on the geometry, at least 5 parts are required for complete testing. If, due to the geometry, the tests cannot be performed on the component, data sheets or measurements performed on test panels may be referenced.Appearance

The finished parts must be free of flaws and processing defects (voids, cracks, joining seams, etc.)on the surface and in the loaded and functionally relevant area. If voids or other processing defects

3 3.1

3.2

Group Standard

VW 50134

Issue 2011-05

Class. No.:55121

Descriptors:

PA6, polyamide 6, glass fiber-reinforced, mineral-reinforced, engine compartment, chassis, body

Verify that you have the latest issue of the Standard before relying on it.

This electronically generated Standard is authentic and valid without signature.

The English translation is believed to be accurate. In case of discrepancies, the German version is alone authoritative and controlling.

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This Standard is available to contracting parties solely via the B2B supplier platform https://www.wendangku.net/doc/8e9729425.html,.

? Volkswagen Aktiengesellschaft

VWNORM-2011-08c

are present in loaded and functionally relevant areas, the supplier must demonstrate their dimensional stability under all critical load conditions. Maximum deviation samples must be coordinated with the appropriate department.

The parts must enable proper installation. There must not be any functional risks and/or risks of injury for assembly workers due to burrs and/or residual foreign matter becoming loose.Manufacturing method

The materials are intended for injection molding and blow molding processes.Conditioning

A distinction is made between the "dry " and "conditioned " conditioning states.

Specimens from components in the "dry " state have been dried until their weight remains constant (see Section 7.2) and stored in a dry atmosphere without interruption before testing.

Specimens from components in the "conditioned " state are specimens in the "dry" state that are aged in a water-tight bag filled with water at 70 °C until the equilibrium state in Table 1 and Table 2 is reached. Deviating from this procedure, specimens may also undergo accelerated conditioning as per DIN EN ISO 1110.Evaluating the measurement results

The required numerical values apply to each individual measurement.Material requirements

Special material requirements (e.g., lightfastness, flammability, emissions) must be obtained from the drawing.Processing quality

See Section 7.1.

There must not be any cracks, or damage that puts the functionality at risk, on the components.Moisture content

See Section 7.2.

It must be ensured that the parts are delivered to the plants that will be using them with a minimum moisture content of > 0,7 weight percent H 2O.Melting temperature

See Section 7.3.

The melting temperature must be higher than 215 °C.

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3.4

3.5

4.1

4.2

4.3

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Elevated-temperature behavior

The parts must not exhibit any change in shape or surface after undergoing heat aging and being cooled down subsequently; see Section 7.4. The dimensional change in length and width must not exceed 0,5%.Low-temperature behavior

The finished parts must be fully functional at low temperatures; see Section 7.5. They must remain free of cracks and other damage after being subsequently heated up to room temperature.

4.4 4.5

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M a t e r i a l r e q u i r e m e n t s

T h e r e q u i r e d p r o p e r t i e s a s a f u n c t i o n o f t h e f i l l e r m u s t b e o b t a i n e d f r o m T a b l e 1 a n d T a b l e 2.

T a b l e 1

5 P a g e 4V W 50134: 2011-05

T a b l e 2

P a g e 5V W 50134: 2011-05

P a g e 6V W 50134: 2011-05

Requirements dependent on the place of use

For some places of use, additional requirements must be met; see Table 3 to Table 5.

Table 3 – Oil

Normally, heat aging must be performed at 150 °C for the intake area of application. A different temperature may be required as per a pertinent drawing entry (see Table 4).

Table 4 – Intake

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Table 5 – Fan wheel

Notes on testing Processing quality

At least 3 whole finished parts are aged in a stress-relieving medium [e.g., 35% ZnCl 2 solution (sol‐dering fluid)] for 48 h at room temperature. After being aged in the medium, the specimens must be rinsed with tap water and then dried for 24 h at 70 °C. They are then evaluated.Moisture content

The moisture content is determined by drying the specimens in the (vacuum) oven. At least 3 spec‐imens must be taken from 3 parts; these specimens are weighed with an accuracy of 0,01 g and are then dried at 80 °C until a constant weight is obtained. The specimens must be cooled down to (23 ± 2) °C — which is necessary for the second weighing procedure — in a desiccator.The moisture content may also be determined with commercial moisture meters.Melting temperature

The melting temperature must be determined by means of DSC (differential scanning calorimetry) as per DIN EN ISO 11357-1.

7 7.1

7.2

7.3

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Elevated-temperature behavior

Heat-aging test as per DIN 53497, method B, to be performed on at least one complete finished part.The aging time is (22 ± 2) h, the aging temperature is (150 ± 5) °C unless otherwise specified in the drawing or release.Low-temperature behavior

At least 2 finished parts that have been conditioned in a standard climate must be aged at (-40 ± 1) °C for (22 ± 2) h.Notched impact strength

The notched bar impact bending test (impact on narrow side) as per DIN EN ISO 179-1/1eA must be performed. If it is not possible to prepare a specimen with the correct size from the component, a specimen with the following specifications may be used instead: length: (50 ± 1) mm; width:

(10 ± 0,2) mm; thickness according to product thickness (up to a max. of 4 mm); distance between supports (support width): 40 mm; test apparatus: pendulum impact tester 4J.Tensile test

The yield stress and the elongation at break must be determined with a tensile test as per DIN EN ISO 527-1 and DIN EN ISO 527-2, specimen 5A; test rate: 50 mm/min.Weld line strength

Specimens are taken from the component's weld line area and are tested with a tensile test

(Section 7.7) and notched bar impact test (Section 7.6). The weld line must be perpendicular to the force/impact.Heat aging

For heat aging, 1 complete finished part and specimens (at least 3 each for the subsequent tensile test and notched bar impact test) must be aged in a forced air oven at the required temperature for 1 000 h as per DIN 53497. After being aged, the specimens must be stored in a desiccator unless they are subjected to the mechanical tests immediately afterwards.Oil immersion aging

Before the oil immersion aging process starts, the specimens (at least 3 each for the subsequent tensile test and notched bar impact test) must be weighed with an accuracy of 0,01 g. These speci‐mens must then be aged in the defined oil at 130 °C for 504 h. A second set of specimens must be aged in the corresponding oil for 96 h at 150 °C. After being removed from the oil, the specimens must be dried with a cloth, weighed again, and then subjected to the mechanical tests.Other applicable documents

The following documents cited in this Standard are necessary to its application.

Some of the cited documents are translations from the German original. The translations of German terms in such documents may differ from those used in this Standard, resulting in terminological inconsistency.

7.4 7.5

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Standards whose titles are given in German may be available only in German. Editions in other languages may be available from the institution issuing the standard.

PV 3936Polymer Materials; Testing the Resistance to Components of Blowby Gas‐

TL 52185Reference Engine Oil SAE 5W-30 for Testing of Compatibility with Respect

to Elastomer Materials; Lubricant Requirements

VW 01155Vehicle Supply Parts; Approval of First Supply and Changes

VW 91101Environmental Standard for Vehicles; Vehicle Parts, Materials, Operating

Fluids; Avoidance of Hazardous Substances

DIN 53497Testing of Plastics; Hot Storage Test on Mouldings Made of Thermoplastic

Moulding Materials without External Mechanical Stressing

DIN EN ISO 1110Plastics - Polyamides - Accelerated conditioning of test specimens

DIN EN ISO 11357-1Plastics - Differential scanning calorimetry (DSC) - Part 1: General princi‐

ples

DIN EN ISO 1172Textile-glass-reinforced plastics - Prepregs, moulding compounds and

laminates - Determination of the textile-glass and mineral-filler content;

calcination methods

DIN EN ISO 1183-1Plastics - Methods for determining the density of non-cellular plastics - Part

1: Immersion method, liquid pyknometer method and titration method DIN EN ISO 179-1Plastics - Determination of Charpy impact properties - Part 1: Non-instru‐

mented impact test

DIN EN ISO 527-1Plastics - Determination of tensile properties - Part 1: General principles DIN EN ISO 527-2Plastics - Determination of tensile properties - Part 2: Test conditions for

moulding and extrusion plastics

ISO 554Standard atmospheres for conditioning and/or testing; Specifications VDA 260Components of motor vehicles; marking of material