GB/T 8546-2017Titanium clad stainless steel plate (English PDF)

4.1.5 Marking example

Example 2: the heat-treated category-2 explosion clad plate, of which the cladding material of one side is a 4 mm-thick TA2G plate and the cladding material of other side is a 2 mm-thick TA1G plate, the base material is a 12 mm-thick 06Cr19Ni10 plate, the width is 1100 mm and the length is 3500 mm. It is marked as: TA2G/06Cr19Ni10/TA1GBM24/12/2×1100×3500GB/T8546-2017

4.2 Dimensions

4.2.1 The allowable deviation of the thickness and width (or diameter) of the clad plate shall comply with the requirements of Table 3.

4.2.2 The allowable deviation of the length of the clad plate shall comply with the requirements of Table 4.

4.2.3 The cladding material can be welded by multiple plates; the panel width of the cladding material shall be >= 300 mm. The thickness of the cladding material is generally 1.0 mm ~ 12 mm, which can be composed of multi-layer materials of the same material. The allowable deviation of the thickness of the cladding material is not larger than ±10% of the nominal thickness of the cladding material.

4.2.4 When the width (or diameter) of the clad plate is greater than 1 450 mm, the base material is allowed to be welded.

4.2.5 The distance between the base material weld and the cladding material weld is not less than 100 mm.

4.2.6 The thickness of the clad plate base material shall be in accordance with the provisions of GB/T 709.

4.2.7 The unevenness of the clad plate shall comply with the requirements of Table 5. Special requirement, if any, shall be determined by both parties.

4.6 Non-destructive testing

4.6.3 The non-penetrating defects on the cladding material and base material metal surface can be repaired by welding. For the repairing area, ultrasonic testing and penetrant testing shall be performed in accordance with the requirements of 4.6.1 and 4.6.2.

4.6.4 After the cladding materials are welded, relevant non-destructive testing items and requirements shall be determined by the supplier and the buyer, and indicated in the contract.

4.6.5 The weld of the base material shall be subjected to 100% radiographic testing and shall comply with the Class-II regulations of NB/T 47013.2-2015.

4.7 Appearance quality

4.7.1 The clad plate shall be delivered when the surface of the cladding material is in the state of polishing, pickling or sand blasting. When the demander has special requirements on the surface, it shall be agreed by the supplier and the buyer.

4.7.2 The surface of the clad plate is not allowed to have macroscopic defects such as cracks, peeling, pressing pits and inclusions; however, it is allowed to have defects such as scratches, pits and indentations that do not exceed half of the thickness deviation of the cladding material.

4.7.3 The local defects on the surface of the cladding material are allowed to be removed; however, the thickness of the cladding material after cleaning shall not be less than its minimum value.

5.1 Dimension inspection

5.1.1 The thickness of the clad plate shall be measured, at the point of not less than 100 mm from the apex angle and not less than 20 mm from the edge, by a micrometer or a caliper rule, or by an ultrasonic thickness gauge.

5.1.2 The measurement method of the clad plate cladding material thickness shall be carried out in accordance with the provisions of Appendix A of GB/T 6396-2008.

5.1.3 The length, width (or diameter) of the clad plate shall be measured by a gauge of appropriate accuracy.

5.2 Chemical composition analysis

5.2.1 Analysis of chemical composition of the cladding material shall be carried out according to GB/T 4698.

6.4 Determination of the test result

6.4.1 When the product's dimensions and appearance quality are unqualified, the product is judged to be unqualified.

6.4.2 When the test results of the mechanical properties or bending properties of the product are unqualified, double the number of samples from the same batch of clad plates shall be tested repeatedly for the unqualified items. If all the repeated test results are qualified, the batch of products is judged to be all qualified. If any of the samples fails to pass the test, the batch is judged to be unqualified. It is allowed to repeat the test for the unqualified items one by one, and the qualified ones can be delivered in a new batch.

6.4.3 If the ultrasonic test is unqualified, the product is judged to be unqualified.

6.4.4 If the penetrant testing is unqualified, the product is judged to be unqualified.

7.1 Marking

Each clad plate shall be marked with the product grade, batch number, manufacturer's name (or factory label), date of manufacture, specifications and status on the surface of the cladding material at the end of the steel plate.

7.2 Packaging, transportation and storage

7.2.1 The clad plate is packaged in nude. The surface of the cladding material shall be effectively protected and the two sides are opposite. The middle is lined with articles such as moisture-proof paper, wooden strips, and the outside is tied with metal wire. Special requirements for packaging, if any, shall be determined by both parties.

7.2.2 During transportation and storage, the product shall be protected from collision, scratches, moisture and erosion of active chemicals.

7.3 Quality certificate

Each batch of products shall be accompanied by a quality certificate, which indicates:

a) the name or code of the supplier;

b) product name or code;

c) article number (cladding material and base material);

d) product batch number, base material heat number, delivery status, product number;

e) product batch weight and number of pieces;

f) various of analysis and test results and stamps of the inspection department;

g) number of this standard;

h) date of packaging, etc.