Template For ENG STDS
WORLDWIDE
ENGINEERING
STANDARDS
CG757
Material Specification
GMW3029
Polyamide 6 - Glass Fiber Reinforced, Heat Stabilized
1 Scope
Note: Nothing in this standard supercedes applicable laws and regulations.
Note: In the event of conflict between the English and domestic language, the English language shall take
precedence.
1.1 Purpose/Material Description. This specification describes material types of glass fiber reinforced, heat
stabilized Polyamide 6 (nylon 6), which are used in injected or extruded form for molded components.
1.2 Symbols. The symbol, per ISO 11469, shall be completed by the supplier according to the glass fiber content
of the material. The material abbreviations according to ISO 11469 are shown in Table 1 and Table 2.
1.3 Applicability. Painted Wheel Covers, Pedals, Gears, Spacers, Relays, Brackets, Fans.
1.4 Remarks. Not applicable.
2 References
Note: Only the latest approved standards are applicable unless otherwise specified.
2.1 External Standards/Specifications.
ISO 75-2
ISO 179-1/1eA
ISO 188
ISO 294-1
ISO 527-1/2
ISO 1183-1
ISO 1183-2
ISO 3146
ISO 3451-1
ISO 3451-4
ISO 3795
ISO 11357-3
ISO 11469
ISO 15512
ISO 16396-2
GMW14444
GMW14797
GMW15634
GMW16172
GMW16853
2.2 GM Standards/Specifications.
GMW3013
GMW3059
GMW3205
GMW3221
GMW3232
GMW3235
GMW14270
GMW14335
2.3 Additional References.
•
Plastic Submission Template.
3 Requirements
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3.1 Requirements on Test Specimens. Materials approved to this specification shall meet the requirements of
GMW3013.
Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 294-1 with the
conditions for injection molding from ISO 16396-2. Test methods and specimen dimensions are also to be in
accordance with ISO 16396-2.
All values indicated herein are based on material considered to be in the dry-as-molded state with moisture
content of 0.2% maximum (ISO 15512 Method A or Method B, or GMW14335). Immediately after molding, per
ISO 16396-2, specimens shall be sealed in moisture-proof containers and stored at (23 ± 2) °C for at least 24 h.
All tests shall be performed on unannealed specimens immediately after their removal from the containers in a
controlled atmosphere per GMW3221, Code A, unless otherwise specified. In addition, tests specified at
temperatures below or above (23 ± 2) °C shall be conducted at the specified temperature using specimens
conditioned at the specified temperature for 4 h minimum.
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GM WORLDWIDE ENGINEERING STANDARDS
Template For ENG STDS
GMW3029
The values specified in Table 1 shall be met by test specimens in natural, black or in a standard sampled color
if natural or black are not available. See the Polyamide tab on the Plastics Submission Template and GMW3013
for test details and parameters.
3.2 Requirements on Delivery. Important physical, mechanical, and thermal properties that characterize the
material are summarized in Table 1. The color shall be specified on drawings, in material specifications and
otherwise.
3.3 Compound Properties (Natural and Black). The following are also required for full approval. The minimum
number of lots per test required is one unless otherwise specified. See the Polyamide tab on the Plastics
Submission Template and GMW3013 for test details and parameters.
•
Poisson’s Ratio
•
Stress/strain data points and curves at the following temperatures:
-30 °C, +23 °C, +85 °C, +110 °C, +125 °C, +150 °C.
Note: See GM Material Property Database (GMMPD) tab on Plastics Submission Template for test details
(contact specification owning group named in Section 6 for access).
•
Coefficient of Linear Thermal Expansion (CLTE) data.
Note: See GMMPD tab on Plastics Submission Template for test details (contact specification owning group
named in Section 6 for access).
•
Differential Scanning Calorimetry (DSC) curve.
•
Fourier Transform Infrared (FTIR) spectroscopy curve.
• Mold shrinkage.
3.4 Initial Source Approval. No shipments shall be made by any supplier until representative initial production
samples have been approved by the appropriate Materials Engineering department(s) as meeting the
requirements of this specification.
3.5 Requirements on Parts. Parts of this material type shall have a water content at delivery, when tested per
GMW14335 or ISO 15512, Method A or Method B, of at least:
1.5% by mass for material types reinforced up to 20% by mass.
• 1.0% by mass for material types reinforced over 20% by mass.
Deviations from this shall be specifically indicated on the part drawings.
3.6 Performance Requirements. Performance requirements shall be specified on part drawings or in
component specifications. All parts manufactured from these materials shall be resistant to the media contacted
at the place of use, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases, and alcohols.
3.7 Emissions Testing of Interior Materials and Parts. For all Code E designated parts per GMW14444,
reference GMW16853 for emissions testing of interior materials and parts.
3.8 Paintability. Plastics used for painted applications are required to meet Paint Performance Requirements
for New Plastic Materials per GMW16172. Additionally, painted plastic parts are required to meet Painted Plastic
Parts Performance Requirements per GMW14797.
3.9 All materials supplied to this standard shall comply with GMW3059, Restricted and Reportable Substances.
For raw materials, non-dimensional materials (e.g., fluids, greases) and/or bulk materials that require approval
into the GM Materials Approved Source List (GMMASL), an International Material Data System (IMDS)
submission shall be made by the material supplier as a material Material Data Sheet (mMDS). After the mMDS
is approved by the GM IMDS team, the materials supplier is to provide a “Header only report” to the responsible
GM Materials Engineer. Further guidance can be found in the GM-specific instructions on the IMDS website.
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•
GM WORLDWIDE ENGINEERING STANDARDS
GMW3029
Template For ENG STDS
Nominal Glass Fiber Reinforcement Percentage
10%
15%
20%
25%
Range
Range
Range
Range
Standard
Unit
5%
Range
International
Organization
for
Standardization
(ISO) Symbol
ISO 11469
-
>PA6GF5<
>PA6GF10<
>PA6GF15<
>PA6GF20<
>PA6GF25<
>PA6GF30<
Ash
ISO 3451-1
ISO 3451-4
%
4 to 7
8 to 12
13 to 17
18 to 22
22 to 28
27 to 33
Density
ISO 1183-1
ISO 1183-2
g/cm3
Target
Range
1.13 to
1.20
Target
Range
1.18 to
1.23
Target
Range
1.20 to
1.26
Target
Range
1.22 to
1.28
Target
Range
1.28 to
1.34
Target
Range
1.33 to
1.39
5750 to
7250
7250 to
8750
8500 to
10 900
Property
Note 1
Moisture
Content
Tensile
Modulus
Tensile Stress
at Yield
Tensile
Elongation at
Yield
Tensile Stress
at Break
Tensile
Elongation at
Break
Tensile Stress
at Break after
Heat
Aging Note 2
Notched
Charpy Impact
Strength
at +23 °C
at -30 °C
Notched
Charpy Impact
Strength after
Heat
Aging Note 2
Melting
Temperature
Heat Deflection
Temperature
under Load,
1.8 MPa
ISO 15512
Method A
or B, or
GMW14335
ISO 5271/2
ISO 5271/2
ISO 5271/2
MPa
30%
Range
≤ 0.2
%
Report
data
Report
data
4000 to
5200
≥ 95
N/A
%
Report
data
≥ 3.0
N/A
ISO 5271/2
MPa
Report
data
≥ 85
≥ 110
≥ 125
≥ 149
≥ 155
ISO 5271/2
%
Report
data
≥ 4.0
≥ 2.5
≥ 2.0
≥ 2.0
≥ 2.0
ISO 188
ISO 5271/2
1000 h at
+140 °C
%
Retention
ISO 1791/1eA
kJ/m2
MPa
ISO 188
ISO 1791/1eA
1000 h at
+140 °C
ISO 3146
or
ISO 113573
≥ 80
Report
data
≥3
≥1
%
Retention
ISO 75-2
5000 to
6500
≥ 90
≥4
≥3
≥4
≥3
≥5
≥4
≥ 80
≥6
≥5
≥ 85
°C
Target
Range
211 to
225
Target
Range
211 to
225
Target
Range
211 to
225
Target
Range
211 to
225
Target
Range
211 to
225
Target
Range
211 to
225
°C
≥ 120
≥ 145
≥ 185
≥ 190
≥ 198
≥ 197
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Table 1: Compound Properties (Natural and Black)
Glass Fiber Reinforcement, 5% through 30%
GM WORLDWIDE ENGINEERING STANDARDS
Property Note 1
Standard
Unit
5%
Range
Template For ENG STDS
GMW3029
Nominal Glass Fiber Reinforcement Percentage
10%
15%
20%
25%
Range
Range
Range
Range
30%
Range
GMW3232
or
ISO 3795
Flammability
Emission
Testing of
Interior
Materials: For
initial approval
test 1 lot in
black
-Odor
-Fogging
-Emissions
All reporting
shall be in
accordance
with
GMW3232
mm/minute
Self-Extinguishing (SE) or ≤ 100
GMW16853
-
-
Rating
≥6
mg
Requirements see GMW16853
μg/g
μg/g
Requirements see GMW16853
Requirements see GMW16853
GMW3205B3
GMW3235B-Y2-T2
GMW15634
Volatile
Organic
Compound
(VOC)
value
Semi
Volatile
Organic
Compound
(SVOC)
value
Note 1: These values shall be determined in dry as molded condition. The mechanical properties of types conditioned to equilibrium at room
temperature and 50% relative humidity have significantly altered values.
Note 2: Specimens tested for stress at break to ISO 527-1/2 and notched Charpy impact strength to ISO 179-1/1eA at (+23 ± 3) °C after
heat aging (1000 ± 5) h at (+140 ± 5) °C according to ISO 188, Method A (air oven method), shall have the minimum retention indicated in
the table relative to unaged specimens tested concurrently. Charpy impact specimens shall be notched prior to aging.
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GM WORLDWIDE ENGINEERING STANDARDS
GMW3029
Template For ENG STDS
Table 2: Compound Properties (Natural and Black)
Glass Fiber Reinforcement, 35% through 60%
Standard
International
Organization
for
Standardization
(ISO) Symbol
ISO 11469
Ash
ISO 3451-1
ISO 3451-4
Density
Moisture
Content
Tensile
Modulus
Tensile Stress
at Break
Tensile
Elongation at
Break
Tensile Stress
at Break after
Heat
Aging Note 2
Notched
Charpy Impact
Strength
at +23 °C
at -30 °C
Notched
Charpy Impact
Strength after
Heat
Aging Note 2
Melting
Temperature
Heat Deflection
Temperature
under Load,
1.8 MPa
Unit
35%
Range
Nominal Glass Fiber Reinforcement Percentage
40%
45%
50%
60%
Range
Range
Range
Range
>PA6GF35<
>PA6GF40<
>PA6GF45<
>PA6GF50<
>PA6GF60<
%
32 to 38
37 to 43
42 to 48
47 to 53
57 to 63
ISO 1183-1
ISO 1183-2
g/cm3
Target
Range
1.37 to 1.43
Target
Range
1.42 to 1.48
Target
Range
1.47 to 1.53
Target
Range
1.54 to 1.60
Target
Range
1.68 to 1.76
ISO 15512
Method A or
B, or
GMW14335
%
ISO 527-1/2
MPa
9500 to
12 500
10 700 to
14 300
Report data
14 400 to
18 600
17 400 to
24 000
ISO 527-1/2
MPa
≥ 175
≥ 175
≥ 170
≥ 180
≥ 200
ISO 527-1/2
%
≥ 2.0
≥ 1.0
≥ 1.0
≥ 1.0
≥ 1.0
ISO 188
ISO 527-1/2
1000 h at
+140 °C
%
Retention
ISO 1791/1eA
kJ/m2
≥ 10
≥8
≥ 12
≥8
ISO 188
ISO 1791/1eA
1000 h at
+140 °C
%
Retention
ISO 3146 or
ISO 11357-3
°C
Target
Range
211 to 225
Target
Range
211 to 225
Target
Range
211 to 225
Target
Range
211 to 225
Target
Range
210 to 225
ISO 75-2
°C
≥ 200
≥ 200
≥ 200
≥ 205
≥ 210
≤ 0.2
≥ 90
≥7
≥6
≥8
≥7
≥8
≥7
≥ 85
GMW3232 or
ISO 3795
Flammability
All reporting
shall be in
accordance
with
GMW3232
mm/minute
Self-Extinguishing (SE) or ≤ 100
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Property
Note 1
GM WORLDWIDE ENGINEERING STANDARDS
35%
Range
Template For ENG STDS
Nominal Glass Fiber Reinforcement Percentage
40%
45%
50%
60%
Range
Range
Range
Range
Property Note 1
Standard
Unit
Emission
Testing of
Interior
Materials: For
initial approval
test 1 lot in
black
GMW16853
-
-
Rating
≥6
mg
Requirements see GMW16853
μg/g
μg/g
Requirements see GMW16853
Requirements see GMW16853
-Odor
-Fogging
-Emissions
GMW3205B3
GMW3235-BY2-T2
GMW15634
VOC value
SVOC value
GMW3029
Note 1: These values shall be determined in dry as molded condition. The mechanical properties of types conditioned to equilibrium at room
temperature and 50% relative humidity have significantly altered values.
Note 2: Specimens tested for stress at break to ISO 527-1/2 and notched Charpy impact strength to ISO 179-1/1eA at (+23 ± 3) °C after
heat aging (1000 ± 5) h at (+140 ± 5) °C according to ISO 188, Method A (air oven method), shall have the minimum retention indicated in
the table relative to unaged specimens tested concurrently. Charpy impact specimens shall be notched prior to aging.
4 Manufacturing Process
Not applicable.
5 Rules and Regulations
5.1 Legal Regulations. All materials shall satisfy applicable laws, rules, regulations and recommendations.
5.2 Language. In the event of conflict between the English and domestic language, the English language shall
take precedence.
5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification
shall be tested for conformity with the requirements of this material specification and approved by the responsible
Engineering department prior to commencement of delivery of bulk supplies.
A new approval shall be received for any changes, e.g., properties, manufacturing process, location of
manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release shall
be completed.
It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include
documentation of all modifications of materials and/or processes and to apply for a new release.
5.4 Safety Data Sheets. Safety Data Sheets (SDS) for chemicals supplied to GM for internal production
processes, shall be submitted to GM Manufacturing in compliance with the Globally Harmonized System of
Classification and Labeling of Chemicals (GHS) requirements or other country-specific SDS requirements.
6 Approved Sources
Materials supplied to this specification shall be approved by GM Materials Engineering.
A list of approved materials can be found in the GM Materials Approved Source List (GMMASL). To access this
list, reference GMW14270 for latest location. This GM material file is provided to third parties to reduce redundant
testing of materials. If an approved material is used, the part supplier can use the GM material file reference for
Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved
material, contact (GM Material Engineering) for details on the approval process. The material approval process
shall be completed prior to PPAP start date of the part supplied to GM.
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GM WORLDWIDE ENGINEERING STANDARDS
Template For ENG STDS
GMW3029
7 Notes
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7.1 Glossary. Not applicable.
7.2 Acronyms, Abbreviations, and Symbols.
CLTE
Coefficient of Linear Thermal Expansion
DSC
Digital Scanning Calorimetry
FTIR
Fourier Transform Infrared
GHS
Globally Harmonized System
GMMASL GM Materials Approved Source List
GMMPD
GM Material Property Data
GSSLT
Global Subsystem Leadership Team
IMDS
International Material Data System
ISO
International Organization for Standardization
mMDS
material Material Data Sheet
PPAP
Production Part Approval Process
SDS
Safety Data Sheet
SE
Self-Extinguishing
SVOC
Semi-Volatile Organic Compound
VOC
Volatile Organic Compound
8 Coding System
8.1 This standard shall be referenced in other documents, drawings, etc., as follows:
GMW3029P-PA6-GFXXH
Where:
GMW
=
Validation Area (GM Worldwide)
3029
=
Sequential number
P
=
Material Type - Plastics
PA6
=
Plastic Type
GFXX
=
Glass Fiber Content, percent by Mass
H
=
Heat Stabilized
For example: GMW3029P-PA6-GF30H is a heat stabilized, Polyamide 6 with 30% glass fiber reinforcement.
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GM WORLDWIDE ENGINEERING STANDARDS
Template For ENG STDS
GMW3029
9 Release and Revisions
This standard was originated in January 1998. It was first approved in July 1998. It was first published in March
1999.
Issue
Publication Date
Description (Organization)
1
MAR 1999
Initial publication.
2
OCT 2000
Conversion to SGML and editorial changes (GME Specification Center)
3
OCT 2010
5 Year Refresh – inserted into 2010 template. (Global Plastics Team)
4
NOV 2014
Complete revision to remove the following code letters: Elastomer Modified (E),
Flame Retardant (F), Exterior Weatherable (L), Polymer Modified (P), Silicone
Lubricated (S), Interior UV Stabilized (U); Removed flexural modulus, unnotched
Charpy impact, added interior emissions. (Materials - Plastics GSSLT)
5
NOV 2015
Addition of 60% glass fiber reinforcement grade. (Materials – Plastics Global
Subsystem Leadership Team)
6
OCT 2020
Refresh. (Materials – Plastics Global Subsystem Leadership Team (GSSLT))
7
MAR 2022
Added 10% glass fiber. (Materials – Plastics Global Subsystem Leadership
Team (GSSLT))
Cross Reference of Replaced Specifications
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GMW3029
Replaced Specifications
GMW3029P-PA6-GF20H
QK 002717H (GME)
GMW3029P-PA6-GF25H
GMP.PA6.004 (GMNA), QK 002712H (GME)
GMW3029P-PA6-GF30H
GMP.PA6.054 (GMNA), QK 002713 (GME)
GMW3029P-PA6-GF35H
QK 002714H (GME)
GMW3029P-PA6-GF40H
QK 002716H (GME)
GMW3029P-PA6-GF45H
GMP.PA6.015 (GMNA)
GMW3029P-PA6-GF50H
QK 002715H (GME)
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