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GB/T 5237 consists of the following six parts under the general title Wrought aluminium alloy extruded profiles for architecture:
——Part 1: Mill finish profiles;
——Part 2: Anodized profiles;
——Part 3: Electrodeposition coating profiles;
——Part 4: Powder coating profiles;
——Part 5: Paint coating profiles;
——Part 6: Thermal barrier profiles.
This is Part 1 of GB/T 5237.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB 5237.1-2008 Wrought aluminium alloy extruded profiles for architecture - Part 1: Mill finish profiles. In addition to a number of editorial changes, the following technical changes have been made with respect to GB/T 5237.1-2008:
——statement of "4.3 and 4.4.1.1.2 in this part are compulsory; the requirements for wall thickness deviation of profiles with nominal wall thickness not greater than 1.50mm in Table 3 and those for tensile property in 4.5 are compulsory, and the remaining are voluntary" in the Foreword is deleted (see the Foreword in Edition 2008);
——statement of "the design unit and use unit shall select the wall thickness dimension of profiles correctly based on the technical demands and technical specification of local architecture when purchasing door and window profiles according to this part" in the Foreword is deleted (see the Foreword in Edition 2008);
——statement of "the aluminum and aluminum alloy profiles not included in this part may be in accordance with GB/T 6892-2006 Wrought aluminium and aluminium alloys extruded profiles for general engineering" in the Foreword is deleted (see the Foreword in Edition 2008);
——the applicable "scope" of this part is modified (see Clause 1; Clause 1 in Edition 2008);
——guide language for normative references is modified (see Clause 2; Clause 2 in Edition 2008);
——normative reference GB/T 228-2002 is deleted (see Clause 2 and 5.2 in Edition 2008);
——normative reference YS/T 436 is deleted (see Clause 2 and 4.1.2 in Edition 2008);
——normative reference GB/T 7999 is added (see Clause 2 and 5.1.1);
——normative reference GB/T 8005.1 is added (see Clauses 2 and 3);
——normative reference GB/T 8170 is added (see Clause 2 and 5.1.3);
——guide language for terms and definitions are added (see Clause 3);
——term and definition of "mill finish profiles" is deleted (see 3.1 in Edition 2008);
——the definition of "exposed surfaces" is modified (see 3.1; 3.2 in Edition 2008);
——requirements for designation and state are modified (see 4.1.1; 4.1.1 in Edition 2008);
——requirements for dimensional specification are modified (see 4.1.2; 4.1.2 in Edition 2008);
——title of "ingot" is revised as "quality assurance" (see 4.2; 4.2 in Edition 2008);
——requirements for chemical composition of 6463 and 6463A alloy designations are deleted (see 4.3 in Edition 2008);
——requirements for the minimum nominal wall thickness of profiles are deleted (see 4.4.1.1.2 in Edition 2008);
——requirements for selection of wall thickness deviation are modified (see 4.4.1.1.2; 4.4.1.1.3, 4.4.1.1.4 and 4.4.1.1.5 in Edition 2008);
——in the requirements for permissible deviation of wall thickness, "≤1.5mm" in nominal wall thickness column is revised as "1.20mm~2.00mm", ">1.5mm~3mm" is revised as ">2.00mm~3.00mm" (see 4.4.1.1.2; 4.4.1.1.3 in Edition 2008);
——requirements for permissible deviation of non-wall thickness dimension are modified (see 4.4.1.2.1; 4.4.1.2.1 in Edition 2008);
——the maximum permissible chamfer (or transition fillet) radius is modified (see 4.4.1.4.2; 4.4.1.4.2 in Edition 2008);
——permissible deviation of fillet radius is modified (see 4.4.1.4.3; 4.4.1.4.3 in Edition 2008);
——unit of mill finish profiles length is uniformly revised as "mm" from "m", and the values are modified accordingly (see 4.4.2, 4.4.3 and 4.4.4; 4.4.2, 4.4.3 and 4.4.4.1 in Edition 2008);
——requirements for the ordinary grade and high precision grade of plane clearances of mill finish profiles with nominal width greater than 25.00mm~100.00mm are modified (see 4.4.2; 4.4.1.6 in Edition 2008);
——requirements for the ordinary grade and high precision grade of curvatures at any 300mm length of the mill finish profiles with circumscribing circle diameter ≤38mm and minimum wall thickness ≤2.40mm are modified (see 4.4.3; 4.4.2 in Edition 2008);
——requirements for ultra-high precision grade of twisting degree are modified (see 4.4.4; 4.4.3 in Edition 2008);
——requirements for mechanical property of 6060T66 and 6063T66 mill finish profiles are added in "mechanical property" requirements (see 4.5.1; 4.5.1 in Edition 2008);
——requirements for analysis method of chemical composition are modified (see 5.1; 5.1 in Edition 2008);
——requirements for tensile test method are modified (see 5.3; 5.2 in Edition 2008);
——requirements for inspection and acceptance are modified (see 6.1; 6.1 in Edition 2008);
——sampling requirements are modified (see 6.4; 6.4 in Edition 2008);
——judgment requirements for inspection result are modified (see 6.5; 6.5 in Edition 2008);
——requirements for marking are modified (see 7.1; 7.1 in Edition 2008);
——contents of quality certificate are modified (see 7.4; 7.4 in Edition 2008);
——contents of order (or contract) are modified (see Clause 8; Clause 8 in Edition 2008).
This part was proposed by China Petroleum and Chemical Industry Federation.
This part is under the jurisdiction of National Technical Committee 243 on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
The previous editions of standards replaced by this part are as follows:
——GB/T 5237-1985 (contents about profiles not subject to surface treatment) and GB/T 5237-1993 (contents about profiles not subject to surface treatment);
——GB/T 5237.1-2000, GB 5237.1-2004 and GB 5237.1-2008.
Aluminium alloy extruded profiles for architecture - Part 1: Mill finish profiles
1 Scope
This part of GB/T 5237 specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificate as well as content of order (or contract) of mill finish profiles for aluminium alloy extruded profiles for architecture.
This part is applicable to aluminium alloy hot-extruded profiles (not subject to surface treatment) for doors, windows, curtain walls and guardrails (hereinafter referred to as mill finish profiles).
Hot-extruded tube with the same application may also be implemented by reference to this part.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3190 Wrought aluminium and aluminium alloy - Chemical composition
GB/T 3199 Wrought aluminium and aluminium alloy products - Packing, marking, transporting and storing
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 7999 Optical emission spectrometric analysis method of aluminum and aluminum alloys
GB/T 8005.1 Aluminium and aluminium alloys - Terms and definitions - Part 1: Product and method of processing and treatment
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 16865 Test pieces for tensile test for wrought aluminum and magnesium alloy products
GB/T 17432 Methods of sampling for analyzing the chemical composition of wrought aluminum and aluminum alloy
GB/T 20975 (All parts) Methods for chemical analysis of aluminium and aluminium alloys
YS/T 67 Wrought aluminium and aluminium alloy columniform ingots
YS/T 420 Aluminium alloys webster hardness standard test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 8005.1 and the following apply.
3.1
exposed surfaces
surfaces of mill finish profiles corresponding to the visible positions of profiles being processed and assembled and installed on the building, including in an open or closed state
3.2
circumscribing circle
smallest circle being able to completely enclose the cross section of mill finish profiles As shown in Figure 1
Figure 1 Schematic diagram for circumscribing circle
4 Requirements
4.1 Product classification
4.1.1 Designation and state
Designation and state shall meet those specified in Table 1. When other designation and state need to be purchased, they shall be determined through negotiation of the supplier and the demander, and shall be noted in the order (or contract).
Table 1 Designation and state
Designation a State a
6060 and 6063 T5, T6 and T66b
6005, 6063A, 6463 and 6463A T5 and T6
6061 T4 and T6
a If different designations such as 6005, 6060, 6061, 6063, etc. (or different states of the same designation) are adopted for the same building product at the same time, it is difficult to obtain an anodized surface in the same color by using the same process for anodizing. It is recommended to consider the effect of color inconsistency on building structure sufficiently during selection of designation and state.
b The artificial aging after solid solution heat treatment makes the mechanical property reach special state as specified in this part via process control.
4.1.2 Dimensional specification
The cross-sectional dimension shall comply with the drawings signed by the supplier and the demander. The length shall be determined through negotiation of the supplier and the demander and noted in the order (or contract).
4.1.3 Marking and example
Mill finish profiles marking is expressed in the order of product name, No. of this part, designation, state, section code and length. Example:
Mill finish profiles with 6063 designation, T5 state, section code of 421001 and specified length of 6000mm shall be marked as:
Mill finish profiles GB/T 5237.1-6063T5-421001×6000
4.2 Quality assurance
The quality of ingot for mill finish profiles shall meet the requirements of YS/T 67.
4.3 Chemical composition
Chemical composition shall meet the requirements of GB/T 3190.
4.4 Dimensional deviation
4.4.1 Cross-sectional dimension
4.4.1.1 Wall thickness dimensions
4.4.1.1.1 Wall thickness dimensions are classified into Groups A, B and C, as shown in Figure 2.
Keys:
A——thickness of fin wall;
B——thickness of the peripheral wall of closed cavity;
C——wall thickness of partition between two closed cavities;
H——non-wall thickness dimension;
E——reference dimension significantly affecting H dimension deviation at opening position.
Figure 2 Schematic diagram for indication of cross-sectional dimension
4.4.1.1.2 The permissible deviation of wall thickness is classified into ordinary grade, high precision grade and ultra-high precision grade, as shown in Table 2. The permissible deviation of wall thickness shall be selected according to actual assembly or overlapping requirements, and noted in the drawings. As for the wall thickness which is not noted with deviation in drawings but may be directly measured, the permissible deviation may be regarded as ordinary grade. However, the permissible deviation of wall thickness of assembly-related 6060T5, 6063T5, 6063AT5, 6463T5 and 6463AT5 mill finish profiles shall be in accordance with the requirements for high precision grade, ultra-high precision grade or above in Table 2.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation, storage and quality certificate
8 Order (or contract) content
