GB 5237.1-2004 Aluminium alloy building profiles Part 1: Base materials

This part specifies the contract content, requirements, test methods, inspection rules, packaging, marking, transportation and storage of aluminum alloy building profiles without surface treatment. This part is applicable to 6061, 6063 and 6063A aluminum alloy hot extrusion profiles for the construction industry. Hot extrusion tubes with the same purpose or hot extrusion profiles for other industries can also refer to this part. GB 5237.1-2004 Aluminum alloy building profiles Part 1: Base material GB5237.1-2004 Standard download decompression password: www.bzxz.net

ICS77.150.10
National Standard of the People's Republic of China
GB5237.1-2004
Replaces GB/T5237.1—2000
Aluminium alloy profiles for architecture
Part 1: Base materials
Wrought aluminium alloy extruded profiles for architecture-Part 1:Untreated profiles
Promulgated on 2004-11-01
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on 2005-03-01
GB5237.1—2004
Clause 5.3, 5.4.1.5 and 5.5 of this part are mandatory, Table 2, Table 3, Table 4 and part of Table 10 are mandatory, and the remaining clauses are recommendatory.
GB5237 "Aluminum Alloy Building Profiles" is divided into six parts: - Part 1: Base Material
- Part 2: Anodized and Colored Profiles- Part 3: Electrophoretic Painted Profiles
- Part 4: Powder Sprayed Profiles
-- Part 5: Fluorocarbon Paint Sprayed Profiles
Part 6: Thermal Insulation Profiles
This part is the first part of GB5237. The products specified in this part cannot be used directly in buildings. This part is mainly used as the base material standard for GB5237.2, GB5237.3, GB5237.4, and GB5237.5. This part is a revision of GB/T5237.1-2000. This revision changes the nature of the standard from a recommended standard to a mandatory standard, and changes Article 5.4.1.5 to the minimum nominal wall thickness of door and window profiles should not be less than 1.20mm, and the minimum measured wall thickness of aluminum alloy profiles for external doors and windows should comply with the provisions of GB/T8478 and GB/T8479 respectively. The minimum measured wall thickness of aluminum alloy profiles for curtain walls should comply with the provisions of relevant national standards or industry standards for engineering construction. "Appendix A to this part is a normative appendix.
This part replaces GB/T5237.1-2000 from the date of implementation. This part is proposed by the China Nonferrous Metals Industry Association. This part is under the jurisdiction of the National Technical Committee for Standardization of Nonferrous Metals. The main drafting units of this part are: Northeast Light Alloy Co., Ltd., China Nonferrous Metals Industry South China Product Quality Supervision and Inspection Center, Guangdong Xingfa Group Co., Ltd., Guangdong Jianying Aluminum Profile Factory Co., Ltd., and Foshan Jinlan Aluminum Factory Co., Ltd. The main drafters of this part are: Zuo Hongqing, Lv Xinyu, Chen Shichang, Chen Hongzai, Wang Laiding, Lu Jiyan, Zhang Guibin, Wang Jurong, and Zhang Zhongxing. This part is interpreted by the National Technical Committee for Standardization of Nonferrous Metals. The previous versions of the standard are: GB/T5237-1985, GB/T5237-1993 (profiles without surface treatment), GB/T5237.1-2000. I
1 Scope
Aluminum alloy building profiles: Part 1: Base material GB5237.1-2004
This part specifies the contract content, requirements, test methods, inspection rules and packaging, marking, transportation and storage of aluminum alloy building profiles without surface treatment.
This part is applicable to 6061, 6063 and 6063A aluminum alloy hot extruded profiles for the construction industry. Hot extruded pipes with the same purpose or hot extruded profiles for other industries can also refer to the adoption This part applies. 2 Normative references
The clauses in the following documents become the clauses of this part through reference in this part. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, all parties that have reached an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part. GB/T228 Room temperature tensile test method for metallic materials GB/T3190 Chemical composition of deformed aluminium and aluminium alloys GB/T3199
GB/T4340
Packaging, marking, transportation and storage of aluminium and aluminium alloy processed products Metal Vickers hardness test Test
GB/T6987 (all parts) Chemical analysis methods for aluminum and aluminum alloys GB/T8478
Aluminum alloy doors
GB/T8479
Aluminum alloy windows
Specimens for tensile testing of deformed aluminum, magnesium and their alloy products GB/T16865
Sampling methods for chemical composition analysis of deformed aluminum and aluminum alloys GB/T17432
YS/T67 LD30, LD31 round ingots for aluminum alloy extrusion YS/T420 Webster hardness test method for aluminum alloy YS/T436
3 Definitions
Aluminum alloy building profiles drawings
Substrate untreated profiles
Substrate refers to aluminum alloy building profiles without surface treatment. 3.2
Exposedsurfaces
Decorative surface refers to the surface that can still be seen after the profile is processed into doors, windows and walls. It includes the visible surface of openable windows, vents, doors or panels when they are in the open and closed state. 4 Contents of purchase order (or contract)
The purchase order (or contract) for the materials listed in this standard shall include the following contents: a) Product name:
b) Brand, statebzxZ.net
c) Specifications;
d) Accuracy level of dimensional tolerance;
GB5237.1—2004
e) Number of this standard;
f) Other special requirements.
5 Requirements
5.1 Product classification
5.1.1 Brand, state
The brand and state of the product shall comply with the provisions of Table 1. Alloy brand
6063, 6063A
Note: When ordering with other brands and states, the supplier and the buyer shall negotiate and indicate it in the contract. 5.1.2 Specifications
Supply state
T4, T6
T5, T6
The cross-sectional specifications of building profiles shall comply with the provisions of YS/T436 or be determined by the technical drawings signed by the supplier and the buyer, and shall be named by the supplier; the length of the building profiles shall be agreed upon by the supplier and the buyer and indicated in the contract. 5.1.3 Marking example
The marking of the product shall be indicated in the order of product name, alloy brand, supply state, specification (consisting of the profile code and the fixed length) and standard number. The marking example is as follows: Aluminum profile for exterior windows made of 6063 alloy, with supply state T5, profile code 421001, and fixed length of 6000mm, is marked as:
Exterior window profile 6063-T5421001×6000GB5237.1—20045.2 Ingot quality
The quality of the ingot used for extruded profiles shall comply with the provisions of YS/T67 on "homogenized state" ingots. 5.3 Chemical composition
The chemical composition of 6061, 6063, and 6063A profiles shall comply with the provisions of GB/T3190. 5.4 Dimensional tolerance
5.4.1 Permissible deviation of the cross-sectional dimensions of profiles5.4.1.1 The permissible deviation of the cross-sectional dimensions of profiles is divided into ordinary grade, high-precision grade and ultra-high-precision grade, which shall comply with the provisions of Table 2, Table 3, and Table 4 respectively. For instructions on the use of Table 2, Table 3, and Table 4, see Appendix A. 5.4.1.2 The allowable deviation level of the cross-sectional dimensions of the profile shall be agreed upon by the supply and demand parties. However, for the profiles of 6063 and 6063A aluminum alloys, the allowable deviation of the dimensions that have assembly relationships shall be selected from the high-precision or ultra-high-precision grades. 5.4.1.3 When the allowable deviation of the dimensions is high-precision or ultra-high-precision, the allowable deviation value shall be indicated in the product drawing. If the allowable deviation value is not indicated in the drawing but the dimensions of the parts that can be directly measured are implemented according to the ordinary grade. 5.4.1.4 The wall thickness difference of each surface with the same nominal wall thickness dimension and allowable deviation in the cross section shall not be greater than half of the corresponding wall thickness tolerance. 5.4.1.5 The minimum nominal wall thickness of door and window profiles shall not be less than 1.20mm. The minimum measured wall thickness of aluminum alloy profiles for external doors and external windows shall comply with the provisions of GB/T8478 and GB/T8479 respectively. The minimum measured wall thickness of aluminum alloy profiles for curtain walls shall comply with the provisions of relevant national standards or industry standards for engineering construction.
5.4.1.6 Upon agreement between the supplier and the buyer, some profiles with dimensional accuracy higher than ultra-high precision may be provided, and their allowable deviations shall be indicated in the contract or drawings.
Specified part dimensions/
>1. 00~2.00
>2.00~3.00
>3.00~4.00
>4.00~6.00
>6.00~12.00
>12.00~19.00
>19.00~25.00
>25.00~38.00
>38.00~50.00
>50.00~100.00
>100.00~150.00
>150.00~200.00
>200.00~250.00
The part where the metal entity is not less than 75%
Dimensions
All dimensions outside the 3 columns
Allowable deviation (±)/mm
GB5237.12004
Dimensions of all parts where the space is greater than 25%, i.e. the solid body is less than
Hollow profiles? The distance between the measuring point and the reference edge when the enclosed
area is not less than 70mm2
The deviation requirements for the thickness of the profiles with the specified part size of 1.20mm~2.00mm in the table are mandatory. >60~
Unless otherwise specified, the hollow profiles mentioned in this standard include profiles whose through holes are not completely closed and the area of ​​the hollow part is greater than 2 times the square of the opening width. Table 3
Allowable deviation (soil)/mm
Metal entity shall not be less than 75%
Specified part size/
>1.00~2.00
>2.00~3.00
>3.00~4.00
>4.00~5.00
>6.00~12.00
>12.00~19.00
Part size||tt
All dimensions outside the 3 columns
Wall thickness when the area surrounded by the hollow profile is not less than 70mm
Space is greater than 25%, that is, the metal entity is less than
75% of all parts dimensions
Distance L between the measuring point and the reference edge
GB5237.1—2004
Specified part dimensions/
>19.00~25.00||tt ||>25.00~38.00
>38.00~50.00
>50.00~100.00
>100.00~150.00
>150.00~200.00
>200.00~250.00
Table 3 (continued)
Allowable deviation (±)/mm
Metallic entity is not less than 75%
Part size
All sizes outside the 3rd column
Hollow profiles?Wall thickness
When the enclosed
rainfall is not less than 70mm2
space is greater than 25%, that is, the metal entity is less than
75% of all part sizes
The distance L between the measuring point and the reference edge
Note: The wall thickness deviation requirements for profiles with specified part sizes of 1.20mm2.00mm in the table are mandatory. >60~
Unless otherwise specified, the hollow profiles mentioned in this standard include profiles whose through holes are not completely closed and the area of ​​the hollow part is greater than 2 times the square of the opening width. Table 4
Allowable deviation (soil)/mm
Metal entity is not less than 75%
Specified part size/
>1,00~2,00
>2.00~3.00
>3.00~4.00
>4.00~6.00
>6.00~12.00
>12.00~19.00
>19.00~25.00
>25.00~38.00
>38.00~50.00
>50.00~100.00
> 100.c0~150.00
>150.00~200.00
>200.00~250.00
All dimensions
outside the 3 columns
Hollow profiles?Wall friction
space is greater than 25% when the enclosed
area is not less than 70mm
, that is, the metal entity is less than
75% of all dimensions
The distance L between the measuring point and the reference edge
Note: The wall thickness deviation requirements for profiles with designated dimensions of 1.20
~2.00mm in the table are mandatory. 0mm~
Unless otherwise specified, the hollow profiles mentioned in this standard include profiles whose through holes are not completely closed and the area of ​​the hollow part is greater than 2 times the square of the opening width. 4
5.4.2 Permissible deviation of profile angle
GB5237.1—2004
Permissible deviation of profile angle shall comply with the provisions of Table 5 and be indicated in the drawing or contract. If not indicated, 6061 alloy shall be implemented as general precision grade, and 6063 and 6063A alloys shall be implemented as high precision grade. Table 5
Plain precision grade
High precision grade
Ultra-high precision grade
Note: When the permissible deviation requires (+) or (-), the deviation shall be determined by negotiation between the supply and demand parties. 5.4.3 Plane gap
Permissible deviation
Put a ruler horizontally on the profile plane, as shown in Figure 1, and the gap between the profile plane and the ruler shall comply with the provisions of Table 6. If the grade is not indicated, 6061 alloy shall be implemented as general precision grade, and 6063 and 6063A alloys shall be implemented as high precision grade. Table 6
Profile width B
General precision grade
Any 25mm width
Note 1: B is the width of the measured surface.
≤0.8%×B
Plane gap
High precision grade
≤0.6%×B
Unit: mm
Super commercial precision grade
≤0.4%×B
Note 2: Not applicable to profile planes including openings. If it is required to combine the two sides of the opening as a complete plane, it should be indicated in the drawing.
5.4.4 Profile curved surface gap
Place the standard sample closely on the curved surface of the profile, as shown in Figure 2. The maximum allowable gap between the profile curved surface and the standard sample is no more than 0.13mm for every 25mm chord length, and the part less than 25mm is calculated as 25mm. When the center angle of the arc part of the cross section is greater than 90°, it should be determined by the chord length of the 90° center angle plus the chord length of the rest of the center angle. Profiles that require inspection of curved surface clearance should be indicated in the drawings or contracts. The standard sample for inspecting curved surface clearance shall be provided by the purchaser. Plane Same Alcohol
Human Team
5.4.5 Curvature of Profiles
The curvature of the profile is the maximum gap (h.) between the bottom of the profile and the platform measured along the length direction of the profile when the profile is placed on the platform and the bending is stabilized by its own weight, or the maximum value (h,) of the gap measured by using a 300mm long ruler against the surface of the profile along the length direction of the profile, as shown in Figure 3. In the figure, L is the fixed length. The curvature of the profile shall comply with the provisions of Table 7. The accuracy level of curvature shall be indicated in the contract. If not indicated, 6060T5 and 6063AT5 profiles shall be implemented as high-precision grades. The rest shall be implemented as general precision grades. 5
GB5237.1-2004
Circumscribed circle
Minimum wall thickness
Measuring platform
General precision grade
Any 300mm
length h,
Twist degree of profile
Total length L meter
Bending degree, not more than
High precision grade
Any 300mm
Length h,
Total length L meter
Unit is meter
Ultra-high precision grade
Any 300mm
Length h
Total length L meter
The measurement method of twist degree is: put the profile on the platform, when it reaches stability by its own weight, measure the maximum distance N between the bottom surface of the profile and the platform along the length direction of the profile,As shown in Figure 4. The degree of twist is obtained by deducting the bending value at this point from the N value. The degree of twist is divided into grades according to the diameter of the circumscribed circle of the profile, and is expressed in the number of millimeters of twist allowed per millimeter of width of the profile. Profiles with a nominal length of less than or equal to 6m shall comply with the provisions of Table 8. When it is greater than 6m, the two parties shall negotiate. The degree of twist accuracy must be indicated in the contract. If not specified, 6060T5 and 6063AT5 profiles shall be implemented as high-precision grades, and the rest shall be implemented as general precision grades. Figure 4
Circumscribed circle diameter/
General precision grade
Per meter length
>12.5~40
>40~80
>80~250
on total length
twist degree/(mm/millimeter width), not more than high-precision grade
on each meter length
on total length
ultra-high-precision grade
on each meter length
on total length
GB5237.1—2004
Example: For profiles requiring high-precision twist, the circumscribed circle diameter is 120mm and the width is 81mm. The N value measured on a length of 1m is 2mm, and the bending value is 1mm. The twist value is 1mm, and the twist value per millimeter width of the profile is 1/81=0.0123. Looking up Table 8, the allowable twist value is 0.017, that is, the actual twist degree is less than the allowable twist degree, which is qualified. 5.4.7 Allowable deviation of fillet radius
The fillet of the profile is shown in Figure 5. If the purchaser requires a deviation, it shall be noted in the drawing. The allowable deviation shall refer to the provisions of Table 9. Table 9
Fillet radius
Transition fillet radius r.
Note: When the allowable deviation only requires (+) or (-), it shall be determined by negotiation between the supply and demand parties. 5.4.8 Allowable deviation of profile length
Allowable deviation
Unit is in units
5.4.8.1 When the profile requires a fixed length, it shall be noted in the contract. When the nominal length is less than or equal to 6m, the allowable deviation is +15mm. When the length is greater than 6m, the allowable deviation shall be determined by negotiation between the two parties. 5.4.8.2 For profiles delivered in multiple lengths, the allowable deviation of the total length is +20mm. When sawing allowance is required, it shall be noted in the contract. 5.4.8.3 The delivery length of unfixed-length profiles is 1m~6m. 5.4.9 Allowable deviation of end bevel
The bevel of the profile end should not exceed 2°.
5.5 Mechanical properties
The room temperature mechanical properties of 6063-T5, 6063-T6, 6063A-T5, 6063A-T6, 6061-T4 and 6061-T6 profiles shall comply with the requirements of Table 10.
Tensile test
Tensile strength,
Specified non-proportional elongation
Stress, Rm.2
Note 1: When the measured wall thickness of the profile sampling part is less than 1.2mm, the elongation shall not be measured. Elongation/%
Not less than
Thickness of specimen/
Hardness test
Vickers hardness
Webster hardness
Note 2: The room temperature mechanical properties of the profiles after natural aging are the values ​​of aging at room temperature for one month. When the tensile test is carried out after aging at room temperature for less than one month, the specimen shall be subjected to rapid aging treatment, and its room temperature longitudinal mechanical properties shall comply with the provisions of Table 10. Note 3: Only one of the Vickers hardness, Webster hardness and tensile test shall be carried out, and the arbitration test shall be the tensile test. Note 4: The tensile test requirements in the table are mandatory. 7
GB5237.1—2004
5.6 Appearance quality
5.6.1 The surface of the profile shall be clean and tidy, and defects such as cracks, peeling, corrosion and bubbles are not allowed. 5.6.2 Slight pits, dents and scratches are allowed on the surface of the profile. The allowable depth is shown in Table 11; the depth of the die extrusion mark is shown in Table 12. The decorative surface should be indicated in the drawing. If not indicated, it shall be implemented as the non-decorative surface. Table 11
T4, T6
Decorative surface
Defect allowable depth/mm, not more than
Non-decorative surface
Die extrusion decay depth/mm, not more than
5.6.3 The end of the profile is allowed to have local deformation caused by sawing, and its longitudinal length should not exceed 20mm. 6 Test
6.1 Chemical composition analysis method
Chemical composition arbitration analysis shall be carried out in accordance with the method specified in GB/T6987, and the sampling method for chemical composition analysis shall comply with the provisions of GB/T17432.
6.2 Room temperature mechanical properties test method
The tensile test of the profile shall be carried out in accordance with the provisions of GB/T228. The sample is prepared according to the provisions of GB/T16865. The Vickers hardness test of the profile is carried out according to the provisions of GB/T4340, and the Webster hardness test is measured by a clamp hardness tester according to YS/T420. 6.3 Dimension measurement method
The dimensions of the profile are measured by calipers, micrometers, R gauges, feeler gauges, steel tape measures and other tools of corresponding accuracy. 6.4 Appearance quality inspection method
Use normal vision and check under natural scattered light conditions without using a magnifier. When the depth of the defect cannot be determined, the grinding method can be used for measurement.
7 Inspection rules
7.1 Inspection and acceptance
7.1.1 The profile shall be inspected and accepted by the supplier's technical supervision department to ensure that the quality of the profile meets the requirements of this standard (or contract) and fill in the quality certificate.
7.1.2 The purchaser may re-test the received products according to the provisions of this standard. If the re-test results do not conform to the provisions of this standard or the contract, the purchaser shall submit the re-test results to the supplier according to the relevant provisions of this standard and the two parties shall negotiate to resolve the issue. Objections to appearance quality and dimensional deviation shall be raised within one month from the date of receipt of the product, and objections to other performances may be raised within three months from the date of receipt of the product. If arbitration is required, the arbitration sampling shall be conducted by the purchaser and the two parties jointly.
7.2 Batches
Profiles shall be submitted for acceptance in batches, and each batch shall consist of profiles of the same brand, state, and specification, with no limit on batch weight. 7.3 Inspection items
Each batch of profiles shall be inspected for chemical composition, size, mechanical properties, and appearance quality. 8
7.4 Sampling
The sampling location and sampling quantity of profiles shall comply with the provisions of Table 13. Table 13
Test items
Chemical classification
Mechanical properties
Dimensional deviation
Appearance quality
Sampling position
Comply with the provisions of GB/T17432
Comply with the provisions of GB/T16865
Any part
Any part
7.5 Determination and processing of test results||t t||Number of samples
Not less than 1 piece per melting or batch (per 1000kg of product)
2 pieces per batch (furnace), 1 piece per piece
1% per batch, not less than 10 pieces
GB5237.1—2004
Section number of inspection
Section number of requirements
7.5.1 If the chemical composition is unqualified, the whole batch shall be judged unqualified. If the size and appearance quality are unqualified, it is a single piece unqualified. It is allowed to inspect each piece one by one, and the qualified ones shall be delivered.
7.5.2 If one of the mechanical properties is unqualified, 4 more samples shall be taken from the batch (furnace) for re-inspection (including the original unqualified profiles). If one sample is still unqualified after the re-inspection, the whole batch shall be judged unqualified. The supplier may also inspect each piece one by one, or repeat the heat treatment and re-sample. 8 Marking, packaging, transportation, storage
8.1 Packing box marking
The profile packing box marking shall comply with the provisions of GB/T3199. 8.2 Packing, transportation, storage
Profiles are not oiled, and their packaging, transportation and storage shall comply with GB/T3199. The packaging method shall be specified in the contract. 8.3 Quality certificate
Each batch of profiles shall be accompanied by a quality certificate that complies with the requirements of this standard, which shall indicate: a)
Name of supplier;
Product name;
Alloy grade and state
Specification:
Weight or number of pieces;
Batch number:
Mechanical property test results;
Number of this standard;
Stamp of the supplier's technical supervision department;
Packing date,
Number and validity period of the production license.
GB5237.1—2004
Appendix A
(Normative Appendix)
Instructions for use of the table of allowable deviations of cross-sectional dimensionsA.1 The division of columns 2 to 9 in the table is shown in Figure A.1. 4 columns
4 columns~9 rotten
A.2 When a dimension is composed of two or more sub-dimensions, the allowable deviation of the dimension is the sum of the allowable deviations of the sub-dimensions. A.3 Figure A.In Figure A.2, X is the dimension including space. When the solid metal part of the dimension is not less than 75%, the allowable deviation is in column 2. When the solid metal part of the dimension is less than 75%, the allowable deviation is in column 4. In Figure A.2, Y is the solid metal dimension, and its allowable deviation is in column 2. The width B and height H of the hollow profile shown in Figure A.3 should be determined by the following method: the allowable deviation of the width B dimension is in column 4 relative to the height H; conversely, the allowable deviation of the height H dimension is in column 4 relative to the width B. However, when these values ​​are less than the corresponding values ​​in column 2, column 2 is used. For example: the width B of 6063 high-precision hollow profile is 60mm and the height H is 30mm. The allowable deviation of the width (B is 60mm) is the corresponding data of the height (H is 30mm) in column 4 of Table 3, which is ±0.53mm. However, since the corresponding value of the width B itself in column 2 is ±0.61mm, the allowable deviation of the width B is determined to be ±0.61mm. Similarly, the permissible deviation of height H is ±0.86mm, which is the value corresponding to width B in column 4 of Table 3. The value corresponding to height H in column 2 of Table 3 is ±0.30mm. Therefore, the permissible deviation of height H is determined to be ±0.86mm. Figure A.2
A.4 For hollow profiles, when the enclosed hollow area is less than 70mm2, the permissible deviation of wall thickness is in column 2, and when the enclosed hollow area is not less than 70mm2, the permissible deviation of wall thickness is in column 3. If the wall thicknesses on both sides are not equal, the average value of the wall thicknesses on both sides shall be used as the specified dimension in column 1, and the value in column 2 or column 3 shall be taken as the permissible deviation of the wall thicknesses on both sides. A.5 For the profiles shown in Figures A.4 and A5, even if the metal solid part dimension Y is not less than 75% of X, the permissible deviation of X or Z shall not be in column 2, but shall be determined according to columns 4 to 9 based on the L dimension. A.6 For the profiles shown in Figures A.6 to A.12, the allowable deviation of the size of the opening part A is determined by columns 4 to 9 corresponding to the L dimension. Dimension A is not suitable as a reference dimension.
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