WORLDWIDE ENGINEERING STANDARDS
Material Specification Plastics
GMW15581
Acrylonitrile Butadiene Styrene and Polycarbonate Blend, Unfilled
1 Scope
GMW3001 GMW3013 GMW3059 GMW3221 GMW3232
GMW14162 GMW14444 GMW14650 GMW14651 GMW14668
1.1 Material Description. This specification describes material types of unfilled acrylonitrile butadiene styrene and polycarbonate blends, which are used in injection components. Code letters, in addition to GMW3013 guidelines that apply to this specific are listed below.
3 Requirements
Note: Additional Note: Additional characteristics characteristics will be indicated by code letters according to the respective specification number. Code letters that may apply to this specification are defined in GMW3013.
3.1 Material Requirements. Materials approved to this standard shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plastics.
1.1.1 Paintability. Approved paint systems that can be used on this material are listed e.g. in the GM Approved Paint on Parts Systems (GM APOPS) database. database.
3.2 Requirements on Delivery. Important physical, mechanical and thermal properties that characterize the material are summarized in Table 1 and Table 2.
1.1.2 Types. The classification into groups is according to the different properties as described in Table 1, 2, and 3.
Note: Note: For each product the requirements to Table 1 and Table 2 shall be documented documen ted by Certification Statement according to GMW3013. The color shall be specified on drawings, in material specifications and otherwise.
1.2 Symbols. The material abbreviation according to ISO 11469 is >ABS+PC<. 1.3 Typical Applications. Typical applications include exterior and interior substrates that require high temperature stability and low temperature ductility.
2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D955 ASTM D3763 ASTM E831 ISO 75-1 ISO 75-2 ISO 178 ISO 179-1 ISO 294-3 ISO 294-4 ISO 306
ISO 527-1 ISO 527-2 ISO 1133 ISO 1183 ISO 2580-2 ISO 3167 ISO 6603-2 ISO 11359-2 ISO 11469 SAE J1885
2.2 GM Standards/Specifications. GM9538P
GMW3235
3.3 Requirements on Test Specimens. 3.3.1 Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 2580-2. 3.3.2 Test methods and specimen dimensions are also to be in accordance with ISO 2580-2 with the following additions: use ISO 3167, Type 1A, thickness 4 mm, for tensile and flexural properties. 3.3.3 All tests shall be performed on specimen 40 h minimum mi nimum after molding and immediately i mmediately following a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. unannealed 3.3.4 All tests shall be performed on unannealed specimen. 3.3.5 The values specified in Table 1 shall be met by test specimen in natural or black. 3.3.6 The 3.3.6 The values specified in Table 2 shall be met by integrally colored test specimen. 3.3.7 For integrally colored grades where other additive systems (e.g., stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value.
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Originating Department: North American Engineering Standards
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GMW15581
GM WORLDWIDE ENGINEERING STANDARDS
parts 3.3.8 Chemical Requirements. All manufactured from molding compounds shall be resistant to the media they contact at their place of use.
3.4.2 See the styrenic certification template for the test procedures. 3.5 Performance Requirements. 3.5.1 Performance requirements e.g., flammability, fogging or resistance to odor, shall be specified on part drawings or in component specifications.
3.4 Compound Properties. For Compound Property requirements natural, black and intergrally colored see Table 1 and 2. The following are also required for full specification approval.
3.5.2 All finished parts for Interior applications shall meet the requirements according to GMW14444 and GMW14651. This shall be noted on the Certification Statement with Code Letter U.
3.4.1 The minimum number of lots per test required is one in natural: Poisson’s Ratio, Stress Strain Curve at +23°C, +85°C, -30°C; Differential Scanning Calorimeter (DSC) Curve; Multiaxial Impact Curve, and Infrared Spectroscopy Curve.
3.5.3 All finished parts for exterior applications shall meet the requirements according to GMW14650. This shall be noted on the Certification Statement with Code Letter L.
Table 1: Compound Property Requirements (Natural and Black) Standard
Units
T1
T2
T3
T4
T5
T6
T7
Property
Note 1
Tensile Modulus
ISO 527-1, ISO 527-2
MPa
≥1700
≥1800
≥1900
≥1700
≥1800
≥1900
≥1700
Tensile Strength @ Yield
I ISO 527-1, ISO 527-2
MPa
≥40
≥45
≥50
≥40
≥45
≥49
≥40
Flexural Modulus
ISO 178
MPa
≥1700
≥1900
≥1900
≥1700
≥1800
≥1900
≥1700
Charpy Notched Impact Strength @ +23°C
ISO 179-1eA
kJ/m
2
≥20
≥35
≥35
≥20
≥25
≥30
≥ 20
Charpy Notched Impact Strength @ 30°C
ISO 179-1eA
kJ/m
2
≥10
≥10
≥15
≥10
≥10
≥12
≥ 10
Density
ISO 1183/A
g/cm3
1.11 ± 0.04
1.12 ± 0.04
1.15 ± 0.04
1.11 ± 0.04
1.12 ± 0.04
1.15 ± 0.04
1.12 ± 0.06
Melt Flow Rate
3
ISO 1133
cm /10 minutes
Not Applicable
Not Applicable
Not Applicable
>12
>12
>12
Not Applicable
Mold Shrink – Flow Direction (information only)
ISO 294-3, ISO 294-4 or ASTM D955
%
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
Mold Shrink – Cross Flow Direction (information only)
ISO 294-3, ISO 294-4 or ASTM D955
%
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
0.4 to 0.7
HDT – 0.45 MPa
ISO 75-1, ISO 75-2
°C
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
HDT – 1.8 MPa
ISO 75-1, ISO 75-2
°C
≥80
≥90
≥100
≥80
≥90
≥100
≥85
Vicat
ISO 306
°C
≥100
≥110
≥120
≥100
≥110
≥120
≥105
260°C/5kg
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March 2008
` , , ` , ` , , ` , , ` ` , , ` ` ` ` , , ` , , , , ` , ` , , , ` ` ` ` , , ` ` ` -
GM WORLDWIDE ENGINEERING STANDARDS
Standard
` ` ` , , ` ` ` ` , , , ` , ` , , , , ` , , ` ` ` ` , , ` ` , , ` , , ` , ` , , ` -
Property
Note 1
CLTE – Flow Direction (information only)
ASTM E831 or
CLTE – Cross Flow Direction (information only)
ASTM E831 or
Multiaxial Impact Strength @ +23°C & 6.6m/s
ASTM D3763, specimen C, 6.6m/s impact velocity
Multiaxial Impact Strength @ 30°C & 6.6m/s
Multiaxial Impact @ +22°C (information only)
Chrome Plated Properties
ISO 11359-2
Units
10-6 mm/(mm*K)
10
T1
70 to 90
T2
70 to 90
GMW15581
T3
T4
70 to 90
T5
70 to 90
T6
70 to 90
T7
70 to 90
70 to 90
-6
70 to 90
70 to 90
70 to 90
70 to 90
J at maximum force
≥ 30 (information only)
≥ 30 (information only)
≥ 30
≥ 30 (information only)
≥ 30 (information only)
ASTM D3763, specimen C, 6.6m/s impact velocity
J at maximum force
≥30 (information only)
≥30 (information only)
≥30
Must be 90% ductile
≥30 (information only)
≥30 (information only)
≥30
Must be 90% ductile
≥30 (information only)
ISO 66032/40/20/C/4.4
J at maximum force
≥ 30 (information only)
≥ 30 (information only)
>30 Must be 90% ductile
≥30 (information only)
≥30 (information only)
>30 Must be 90% ductile
≥30 (information only)
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
GMW14668
ISO 11359-2
GMW14668
mm/(mm*K)
Not Applicable
70 to 90
70 to 90
70 to 90
≥ 30 (information only)
> 30
Note 1: Standard test specimen and test setup should follow GMW3013.
Table 2: Compound Property Requirements (Integrally Colored) Property Charpy Notched Impact Strength @ +23°C
Standard
Units
T1
T2
T3
T4
T5
T6
ISO 1791eA
kJ/m2
≥15
≥30
≥30
≥15
≥20
≥25
Delta E
≤3.0 No objectionable defects allowed
No specification requirement
No specification requirement
≤3.0 No objectionable defects allowed
No specification requirement
No specification requirement
Delta E
Not Applicable
≤3.0 No objectionable defects allowed
≤3.0 No objectionable defects allowed
No specification requirement
≤3.0 No objectionable defects allowed
≤3.0 No objectionable defects allowed
Delta E
≤3.0 No objectionable defects allowed
No specification requirement
No specification requirement
≤3.0 No objectionable defects allowed
No specification requirement
No specification requirement
Note 1
Colorfastness to Light, Natural Weathering
GM9538P U/G-TSTL50 000 TNR Langleys at +93°C
Colorfastness to Light, Natural Weathering
GM9538P U/G-TSTL10 000 TNR Langleys at +85°C
GMNA/ PATAC only: Colorfastness to Light, Accelerated 263 kJ/m
SAE J1885
2
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GMW15581 GMNA/PATAC only: Colorfastness to Light, Accelerated
GM WORLDWIDE ENGINEERING STANDARDS
≤3.0 No objectionable defects allowed
≤3.0 No objectionable defects allowed
≤3.0 No objectionable defects allowed
No specification requirement
≤3.0 No objectionable defects allowed
SAE J1885
Delta E
Not Applicable
GMW14162 /B/28 MJ/m²
Rating
Rating 4 minimum (Also, there shall be no more than a noticeable change in hue or chroma, and no objectionable tackiness, blotchiness, loss of grain, wrinkling, or other undesirable effects.)
GMW3235Bcondensable constituents
mg
≤2.0
≤2.0
≤2.0
≤2.0
≤2.0
≤2.0
GMW3232
mm/minute
≤100
≤100
≤100
≤100
≤100
≤100
75 kJ/m2 GME only: Colorfastness to Artificial Light Fogging
Flammability
Note 1: Standard test specimen and test setup should follow GMW3013.
Table 3: Properties Assigned to Type
7 Notes
Property
Type
Low PC
T1
7.2 Acronyms, Abbreviations, and Symbols.
Medium PC
T2
ABS
Acrylonitrile Butadiene Styrene
High PC
T3
APOPS
Approved Paint and Parts Systems
Low PC High Flow
T4
Medium PC High Flow
7.1 Glossary. Not applicable.
CLTE
Coefficient Expansion
T5
DSC
Differential Scanning Calorimeter
High PC High Flow
T6
HDT
Heat Deflection Temperature
Chrome Plateable
T7
GME
General Motors Europe
GMNA
General Motors North America
PATAC
Pan Asia Technical Automotive Center
PC
Polycarbonate
4 Manufacturing Process Not applicable.
5 Rules and Regulations. 5.1 All materials supplied to this standard must comply with the requirements of GMW3001, Rules and Regulations for Material Specifications. 5.2 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts.
6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File (i.e., GM Supply Power) under this standard number have been qualified by engineering as meeting the requirements of this standard. For other GM locations, the responsible engineering group should be contacted to obtain the approved source in that individual country.
of
Linear
Thermal
8 Coding System This standard shall be referenced documents, drawings, etc., as follows:
in
other
Material per GMW15581P-ABS+PC-T1Z Where: GMW
=
GM Worldwide
15581
=
Sequential number
P
=
Plastics
ABS+PC
=
Acrylonitrile Butadiene Styrene Polycarbonate
T1
=
Type defined in Table 1
Z
=
Code(s) defined per GMW3013
9 Release and Revisions 9.1 Release. This standard 2007, replacing EDS-M-4641, M-4643, EDS-M-4644, GMP.ABS+PC.003,
originated in April EDS-M-4642, EDSGMP.ABS+PC.002, GMP.ABS+PC.009,
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+
GM WORLDWIDE ENGINEERING STANDARDS
GMW15581
GMP.ABS+PC.012, GMP.ABS+PC.017, HN1598, QK002400, QK002411, QK002412, QK002413, QK002421, QK002422, QK002423, and QK002431. It was first approved by the Global Plastics Team in October 2007. It was first published in March 2008. Cross-Reference of Replaced Specifications GMWP-ABS+PC
Type
GMP.ABS+PC.003, GMP.ABS+PC.017, QK002411
T1
GMP.ABS+PC.009, QK002412, HN1598 Type 1, EDS-M-4643 Type 2, EDS-M-4641 Group 2 Type 1
T2
GMP.ABS+PC.002, QK002413, HN1598 Type 4, EDS-M-4644 Type 1 & 2, EDS-M4643 Type 1, EDS-M-4641 Group 3 Type 1
T3
GMP.ABS+PC.003, QK002421
T4
GMP.ABS+PC.009, QK002422
T5
GMP.ABS+PC.002, QK002423, EDS-M4641 Group 1 Type 1
T6
EDS-M-4642 Type 1, GMP.ABS+PC.012, QK002431, HN1598 Type 2
T7
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