GB/T 3249-2009 (English Version) PDF

Standard No.: GB/T 3249-2009
Language: Chinese, Available in English version
Release Date: 2009
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2022-10
Replace By: GB/T 3249-2022
Latest: GB/T 3249-2022
Replace: GB/T 3249-1982

Scope: This method is to use the principle of air permeability to measure the outer surface area of metal and its compound powder and its related average equivalent spherical particle size (range 0.5μm~50μm). Powders may be tested "as supplied" or after the laboratory has dispersed or ground the powder in accordance with ASTM B 859. The measured value does not necessarily fully reflect the actual state of the powder, but it is very useful as a quality control of the powder. This standard does not raise relevant safety issues. Users should formulate appropriate safety and health practices and determine their scope of adaptation before use.

GB/T 3249-2009 Referenced Document

ASTM B859 Standard Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis
GB/T 3500 Powder metallurgy.Vocabulary
ISO 10070 Metallic powders — Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions*， 2019-12-04 Update

2022 GB/T 3249-2022 Test method for Fisher number of metal powders and related compounds
2009 GB/T 3249-2009 Test method for fisher number of metal powders and related compounds
1982 GB/T 3249-1982 Standard method for determination of particle size of powders of refractory metals and compounds--Fisher method