This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of brass plates and strips for water tank water chambers. This standard is applicable to brass plates and strips for water tank water chambers in the automotive and tractor industries. GB/T 2532-1997 Brass plates and strips for water tank water chambers GB/T2532-1997 Standard download decompression password: www.bzxz.net

GB/T2532
This standard is a revision of GB2532-81.
This standard is a special material standard. There is no similar standard abroad for reference. This standard is revised according to domestic production and use requirements.
Revised changes in this standard:
1. The side curvature of the strip is changed from 4mm/m in the original standard to 3mm/m. 2. The unevenness of the plate is changed from 30mm/m in the original standard to 25mm/m. 3. Added a clause that the mechanical properties of the strip can be negotiated. 4. The grain size is divided into two grades: soft state 0.025mm~~0.065mm, and extra soft state 0.035mm~0.075mm. From the date of implementation of this standard, GB2532-81 will be invalidated at the same time. This standard is proposed by China Nonferrous Metals Industry Corporation. This standard is under the jurisdiction of the Standard Metrology Institute of China Nonferrous Metals Industry Corporation. This standard is drafted by Shenyang Nonferrous Metals Processing Plant. The main drafters of this standard are Feng Anyou, Zhang Fumian and Zhang Chunxuan. 398
1 Scope
National Standard of the People's Republic of China
Brass sheet and strip for
water chamber and water tankGB/T 2532 - 1997
Replaces GB253281
This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of brass sheets and strips for water chambers of water tanks. This standard is applicable to brass sheets and strips for water chambers of water tanks in the automotive and tractor industries. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 228-87:
Metal tensile test method
GB 4156--84
Metal cupping test method (thickness 0.2~～2mm)GR 5232-85
GB 639786
GB 8888-88
Processing brass-chemical composition and product shapeMetal tensile test specimen
Heavy nonferrous metal processing product packaging, marking, transportation and storageGB/T5121--1996Chemical analysis method for copper and copper alloyYS/T 347-—94
3 Order form contents
Method for determination of grain size of single-phase copper alloys
The order form for materials listed in this standard shall include the following contents: 3.1 Material name;
3.2 Brand;
3.3 State;
3.4 ​​Specification;
3.5 Dimensional tolerance;
3.6 Weight;
Standard number and year.
4 Requirements
4.1 Product classification
4.1.1 Brand, state and specification.
The brand, state and specification of plates and strips shall comply with the provisions of Table 1. Approved by the State Bureau of Technical Supervision on December 22, 1997, and implemented on August 1, 1998
GB/T 2532—1997
Table 1 Brand, state and specification of products
M (soft)
TM (extra soft)
0. 7~1. 2
0. 6~~1. 2
Note: Plates and strips of other brands, states and specifications can be supplied upon negotiation between the supply and demand parties. 4.1.2 Marking examples
Format, mm
200~650
100～600
600～1500
210000
The plate made of H68, in soft state, with a thickness of 0.9mm, a width of 300mm and a length of 1.000mm is marked as: Plate H68M0.9X300X1000GB/T2532-1997The strip made of H68, in extra-soft state, with a thickness of 0.8mm and a width of 190mm is marked as: Strip H68TM 0.8X190 GB/T 2532---19974.2 Chemical composition
The chemical composition of plates and strips shall comply with the provisions of H68 grade in GB5232. 4.3 Dimensions and dimensional tolerances
4.3.1 The dimensions and dimensional tolerances of plates shall comply with the provisions of Table 2. Table 2 Plate size and its allowable deviation
0. 7~~0. 8
>0. 8~1. 0
>1, 0～1. 2
Allowable deviation
200~650
Allowable deviation
The size and allowable deviation of strip material shall comply with the provisions of Table 3: Table 3 Strip size and its allowable deviation
0. 6~0, 8
0. 8~1. 0
>1. 0~1. 2
Allowable deviation
100~400
400~600
6001500
4.3.3 The shape of the plate shall be straight. The unevenness of the plate in the length direction shall not exceed 25mm per meter. 4.3.4 The curvature of the side of the strip shall not exceed 3mm per meter. Degree
Allowable deviation
Allowable deviation
4.3.5 The edge of the plate shall be cut straight, without cracks and curling, and slight burrs are allowed; the bevel cutting shall not make the width and length of the plate exceed its allowable deviation. The two sides of the strip shall be cut evenly, without burrs, cracks and curling. 400
GB/T 2532—1997
4.4 When the purchaser has requirements for the mechanical properties of the strip, the supply and demand parties shall negotiate. 4.5 Process performance
The cupping value of the plate and strip shall comply with the provisions of Table 4. Table 4
Cupping value of plate and strip
>0. 8~1. 0
>1.0～1.2
4.6 Grain size
Punch radius
Soft (M)
Cupping depth, not less thanbzxz.net
Extra soft (TM)
The grain size of plate and strip in soft state is 0.025mm~0.065mm, and the grain size of extra soft state is 0.035mm~0.075mm. 4.7 Surface quality
4.7.1 The surface of plate and strip should be smooth and clean, and should not have defects such as delamination, cracks, peeling, bubbles, thorns, folds, inclusions and green rust. 4.7.2 Minor, localized scratches, spots, pits, indentations, roller marks, and repair marks and other defects should not exceed the thickness tolerance of the plate or strip.
Minor oxidation color, redness, darkening, and minor, localized water and oil marks are not considered as scrapping grounds. 5 Test methods
5.1 Arbitration analysis method for chemical composition
The arbitration analysis method for the chemical composition of plates and strips shall be carried out in accordance with the provisions of GB/T5121. 5.2 Mechanical property test method
The room temperature mechanical property test method for strips shall be carried out in accordance with the provisions of GB228. 5.3 Process performance test method
The cupping test method for plates and strips shall be carried out in accordance with the provisions of GB 4156. 5.4 Microstructure test method
The grain size test method for plates and strips shall be carried out in accordance with the provisions of YS/T347. 5.5 Dimension measurement method
5.5.1 The external dimensions of plates and strips shall be measured using measuring tools of corresponding accuracy. 5.5.2 The thickness of plates shall be measured at a distance of not less than 100mm from the top corner and not less than 10mm from the edge; the thickness of strips shall be measured at a distance of not less than 100mm from the end and not less than 5mm from the edge. Thickness deviation outside the measurement range shall not be used as a basis for scrapping. 5.5.3 Measurement of plate unevenness
Put the plate face up on the platform, use a 1000mm steel ruler to lean against the plate surface, and use a length gauge to measure the maximum distance between the plate and the steel ruler. As shown in Figure 1.
Deflection (maximum value)
Plate section
1000mm
Figure 1 Schematic diagram of plate unevenness measurement
5.5.4 Measurement of strip side curvature
GB/T 2532—1997
Put a one-meter-long strip vertically on the inspection platform and pull it straight by hand. Then use a feeler gauge to measure the maximum distance between the edge and the inspection platform.
5.6 Surface quality inspection method
Visually inspect the appearance of the plate and strip.
6 Inspection rules
6.1 Inspection and acceptance
6.1.1 Plates and strips should be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard. And fill in the quality certificate: 6.1.2 The purchaser shall inspect the products received in accordance with the provisions of this standard. If the inspection results do not conform to the provisions of this standard, the purchaser shall submit the matter to the supplier within three months from the date of receipt of the product, and the two parties shall negotiate to resolve the issue. 6.2 Batches
Plates and strips shall be submitted for acceptance in batches. Each batch shall consist of products of the same state and specification, and the weight of each batch shall not exceed 3000kg. 6.3 Inspection items
Each batch of plates and strips shall be inspected for chemical composition, external dimensions, process performance, grain size and surface quality. 6.4 Sampling location and sampling quantity
6.4.1 During the melting and casting process, the supplier shall take one sample from each furnace for chemical composition inspection; the purchaser shall take one sample from each batch of plates and strips for chemical composition inspection.
6.4.2 Mechanical property samples shall be taken from 2 rolls of strips from each batch, and one sample shall be taken from each roll along the rolling direction. The tensile test specimen shall comply with the provisions of P01.P05 test specimens in Table 10 of GB6397. 6.4.3 For the cupping test, two sheets (rolls) of plates and strips shall be randomly selected from each batch, and one sample shall be randomly selected from each sheet (roll). 6.4.4 For the grain size test, two sheets (rolls) of plates and strips shall be randomly selected from each batch, and one sample shall be randomly selected from each sheet (roll). 6.5 Repeated test
In the test of process performance and grain size, even if the test results of one sample are unqualified, double samples shall be taken from the batch to repeat the test of the unqualified item. If one sample is still unqualified in the re-test result, the whole batch shall be unqualified or the samples shall be tested one by one, and the qualified ones shall be accepted as a single batch.
6.6 Determination of test results
When the chemical composition, process performance and grain size are unqualified, the whole batch shall be unqualified; when the surface quality and external dimensions are unqualified, the single piece shall be unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
At least two labels with the following contents shall be hung on each batch of plates and strips that have passed the inspection: a) Inspection stamp of the supplier's technical supervision department;
b) Brand;
c) Supply status;
d) Batch number.
7.2 Packaging, transportation and storage
The packaging, transportation and storage of plates and strips shall comply with the provisions of GB8888. 7.3 Quality certificate
a) Name of supplier;
b) Name of product;
c) Brand;
(d)) Specification;
e) Status;
f) Batch number;
g) Net weight and number of pieces;
GB/T 2532
h) Results of various analyses and tests and stamp of the technical supervision department; i) Number of this standard and year;
ji) Packaging date.
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