GB/T 20926-2007Magnesium and magnesium alloy scraps (English PDF)

Foreword

This Standard was formulated by reference of ISO 23079-2005 Classification and Grading of Magnesium and Magnesium Alloy Scraps, as well as Japanese Standard JIS H 2120-2002 Classification and Grading of Magnesium and Magnesium Alloy Scraps. The Appendixes A and B of this Standard are informative.

1 Scope

This Standard specifies the requirements, test methods, inspection rules and markings, packaging, transportation, storage, contract content, etc. for magnesium and magnesium alloy scraps.

This Standard is applicable to magnesium and magnesium alloy scraps produced in each production process and use process.

2 Normative References

The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.

GB/T 13748 (all parts) Chemical Analysis Methods of Magnesium and Magnesium Alloys

3 Terms and Definitions

For the purposes of this Standard, the following terms and definitions apply.

4 Requirements

4.1 Magnesium and magnesium alloy scraps are mainly divided into three categories (Class I, Class II, Class Ill) and nine grades (Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6, Grade 7, Grade 8 and Grade 9) according to their physical forms.

4.2 Class I magnesium and magnesium alloy scraps are in the form of block and are divided into five grades, namely, Grade 1, Grade 2, Grade 3, Grade 4 and Grade 5.

4.3 Class II magnesium and magnesium alloy scarps are in the form of chip and are divided into three grades, namely, Grade 6, Grade 7 and Grade 8.

4.4 Class III magnesium and magnesium alloy scraps are in the form of slag and are divided into one grade, namely, Grade 9.

4.5 Classification and grading of magnesium and magnesium alloy scraps shall meet the requirements in Table 1.

4.6 Both the supplier and the buyer can also refer to Appendix A (informative) for the detailed classification and grading principles of magnesium and magnesium alloy scraps specified; and refer to Appendix B (informative) for the arrangement of scrap codes.

Magnesium and magnesium alloy scraps shall be submitted for acceptance in batches; and each batch shall consist of scraps of the same grade.

6 inspection Rules

7 Marking, Packaging, Transportation and Storage

8 Contents of the Contract

The contract for ordering magnesium and magnesium alloy scraps covered by this Standard shall include the following contents:

a) scrap grade;

b) alloy designation (can be omitted);

c) weight and allowable error;

d) Items required by this standard that should be indicated in the contract;

e) the number of this Standard;

f) negotiation results when adding content other than this Standard. […]