Standard No.:	GB/T 5149-2026
English Name:	Magnesium and magnesium alloy powder
Chinese Name:	镁及镁合金粉
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-04-30
Implemented on:	2026-11-1
Status:	to be valid
Superseding:	GB/T 5149.1-2004 GB/T 5150-2004 Aluminium-magnesium alloy powder GB/T 31974-2015 Passivated granular magnesium
Target Language:	English
File Format:	PDF
Word Count:	17000 words
Translation Price(USD):	510.0
Delivery:	via email in 1~5 business day

GB/T 5149-2026 Magnesium and magnesium alloy powder English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 5149-2026 Magnesium and magnesium alloy powder 镁及镁合金粉 Issue date: 2026-03-31 Implementation date: 2026-10-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 Technical Requirements 6 Test Methods 7 Inspection Rules 8 Marking, Packaging, Transport, Storage and Accompanying Documents 9 Ordering Information Annex A (Informative) Comparison Table of Old and New Designations Annex B (Normative) Determination of Particle Size Distribution (or Median Diameter) Annex C (Normative) Determination of Apparent Density Annex D (Normative) Determination of Active Magnesium and Active Metal (Al+Mg) Content — Gas Volumetric Method Annex E (Normative) Determination of Moisture Content — Loss on Drying Method Annex F (Normative) Determination of Hydrochloric Acid Insoluble Matter Content — Gravimetric Method Magnesium and magnesium alloy powders 1 Scope This document specifies the classification, technical requirements, inspection rules, marking, packaging, transport, storage and accompanying documents, and ordering information for magnesium and magnesium alloy powders, and describes the test methods. This document applies to the production and delivery of milled magnesium powder, atomised magnesium powder and ballmilled aluminiummagnesium alloy powder used in the manufacture of explosives, pyrotechnics, welding electrodes, flash powders, illuminants, catalysts, reducing agents, chemical raw materials, hightemperature refractory materials and new energy materials, as well as in steelmaking desulphurisation, powder metallurgy and additive manufacturing. 2 Normative References The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB 190 Packing symbol of dangerous goods GB/T 5314 Powders for powder metallurgical purposes — Sampling GB/T 6003.1 Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth GB/T 6682 Water for analytical laboratory use — Specification and test methods GB/T 8170 Rules of rounding off for numerical values and expression and judgement of limiting values GB 12463 General specifications for transport packages of dangerous goods GB/T 13748.1 Methods for chemical analysis of magnesium and magnesium alloys — Part 1: Determination of aluminium content GB/T 13748.2 Methods for chemical analysis of magnesium and magnesium alloys — Part 2: Determination of tin, beryllium, copper, nickel and titanium contents — Spectrophotometric method GB/T 13748.9 Methods for chemical analysis of magnesium and magnesium alloys — Part 9: Determination of iron and silicon contents — Spectrophotometric method GB/T 13748.18 Methods for chemical analysis of magnesium and magnesium alloys — Part 18: Determination of chlorine content — Silver chloride turbidimetric method YS/T 56 Metallic powders — Determination of angle of repose 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 milled magnesium powder Magnesium powder produced by milling or millpulverising methods, used for various purposes such as pyrotechnics, explosives, steelmaking desulphurisation, welding, chemical raw materials, reducing agents and new energy material preparation. 3.2 atomised magnesium powder Magnesium powder produced by atomisation, used for various purposes such as pyrotechnics, welding, catalysts, chemical raw materials, additive manufacturing and powder metallurgy. 3.3 ballmilled aluminiummagnesium alloy powder Aluminiummagnesium alloy powder produced by ball milling, used for various purposes such as pyrotechnics, welding electrodes and hightemperature refractory materials. 4 Classification 4.1 Designation representation method 4.1.1 Designation representation method for milled magnesium powder 4.1.1.1 The designation of milled magnesium powder is represented by three English letters followed by 2 to 4 Arabic numerals, and then followed by one English letter. 4.1.1.2 The first three English letters “FMX” in the designation are the identification code for milled magnesium powder. 4.1.1.3 The 2 to 4 Arabic numerals after the identification code represent the maximum aperture of the test sieve selected for the sieve analysis. 4.1.1.4 The final English letter in the designation is a differentiation code, used to distinguish powders having the same maximum test sieve aperture selected for sieve analysis but with different particle size distributions and/or different apparent densities. The example is as follows: 4.1.2 Designation representation method for atomised magnesium powder 4.1.2.1 The designation of atomised magnesium powder is represented by three English letters followed by 2 to 4 Arabic numerals, and then followed by one English letter. 4.1.2.2 The first three English letters “FMW” in the designation are the identification code for atomised magnesium powder. 4.1.2.3 The 2 to 3 Arabic numerals after the identification code represent the maximum aperture of the test sieve selected for the sieve analysis (see Example 1) or the median diameter (see Example 2). 4.1.2.4 The final English letter in the designation is a differentiation code, used to distinguish powders having the same maximum test sieve aperture selected for sieve analysis but with different particle size distributions and/or different apparent densities. The example is as follows: 4.1.3 Designation representation method for ballmilled aluminiummagnesium alloy powder 4.1.3.1 The designation of ballmilled aluminiummagnesium alloy powder is represented by four English letters followed by 2 to 3 Arabic numerals, and then followed by one English letter. 4.1.3.2 The first four English letters “FLMQ” in the designation are the identification code for ballmilled aluminiummagnesium alloy powder. 4.1.3.3 The 2 to 3 Arabic numerals after the identification code represent the maximum aperture of the test sieve selected for the sieve analysis. 4.1.3.4 The final English letter in the designation is a differentiation code, used to distinguish powders having the same maximum test sieve aperture selected for sieve analysis but with different particle size distributions and/or different apparent densities. The example is as follows: 4.2 Types, designations and typical applications The types, designations and typical applications of magnesium powder are given in Table 1. If the purchaser requires other types or designations, they shall be agreed upon between the supplier and the purchaser and specified in the order. 5 Technical Requirements 5.1 Particle size distribution, median diameter and apparent density 5.1.1 The particle size distribution and apparent density of milled magnesium powder shall comply with the provisions of Table 2. 5.1.2 The particle size distribution, median diameter (D₅₀) and apparent density of atomised magnesium powder shall comply with the provisions of Table 3. The purchaser may select only one of the two indicators, particle size distribution or median diameter (D₅₀), when ordering. 5.1.3 The particle size distribution of ballmilled aluminiummagnesium alloy powder shall comply with the provisions of Table 4. 5.1.4 If the purchaser has special requirements for particle size distribution, median diameter and apparent density, they shall be agreed upon between the supplier and the purchaser and specified in the order. 5.2 Chemical composition 5.2.1 The chemical composition of milled magnesium powder shall comply with the provisions of Table 5. 5.2.2 The chemical composition of atomised magnesium powder shall comply with the provisions of Table 6. 5.2.3 The chemical composition of ballmilled aluminiummagnesium alloy powder shall comply with the provisions of Table 7.