ASTM B213-25 PDF
Name in English:
St ASTM B213-25
Name in Russian:
Ст ASTM B213-25
Original standard ASTM B213-25 in PDF full version. Additional info + preview on request
Full title and description
Standard Test Methods for Flow Rate of Metal Powders Using the Hall Flowmeter Funnel — ASTM B213‑25. Test methods that define the apparatus, calibration, sample preparation, procedure and reporting for measuring the flow rate of free‑flowing metal powders using the Hall (calibrated) flowmeter funnel.
Abstract
ASTM B213‑25 specifies a simple, gravity‑based funnel method (Hall flowmeter) to determine the flow rate of metal powders that will flow unaided through a specified orifice. The method defines required apparatus (Hall funnel and stand), calibration and verification steps, a standard sample mass and test procedure (timing the discharge of a measured portion), result calculation and reporting conventions, and limitations on applicability (only powders that flow freely through the test orifice).
General information
- Status: Active (current)
- Publication date: February 1, 2025
- Publisher: ASTM International
- ICS / categories: 77.160 (Powder metallurgy)
- Edition / version: ASTM B213‑25 (2025)
- Number of pages: 5
Scope
This standard covers the determination of the flow rate of metal powders by timing the discharge of a specified mass of powder through a calibrated Hall flowmeter funnel. It applies only to powders that will flow unaided through the specified orifice. The standard addresses apparatus requirements, calibration checks, sample mass and preparation, test procedures, expression of results and reporting. It does not address all safety considerations associated with handling metal powders.
Key topics and requirements
- Apparatus: Hall (calibrated) flowmeter funnel mounted on an appropriate stand; calibrated orifice (commonly 0.1 in / 2.5 mm).
- Standard sample mass: 50.0 g test portions (typical practice in the method).
- Procedure: block the orifice, fill funnel with test portion, unblock and time discharge until last particle passes; repeat per method and average results.
- Calibration & verification: funnel calibration (using standard material such as Chinese emery) and repeatability checks required; timing device accuracy emphasized.
- Units & reporting: time (s) for a standard mass and/or calculated flow (g/s); environmental/test conditions (temperature, humidity) and sample identification must be reported.
- Limitations: suitable only for powders that flow freely through the Hall orifice; fine or cohesive powders may require alternative methods (Carney funnel or other tests).
Typical use and users
Used by powder manufacturers, powder metallurgy product producers, quality control and R&D laboratories, additive‑manufacturing feedstock suppliers and purchasing/specification engineers to characterize powder flowability for processing (die filling, hoppers, feeders) and for acceptance testing. Also used in supplier–buyer agreements and routine production quality checks.
Related standards
Standards commonly referenced with or as alternatives to B213 include ISO 4490 / EN ISO 4490 (Hall flowmeter method for metallic powders), ASTM B212 (apparent density using Hall funnel), ASTM B417 (apparent density for non‑free‑flowing powders using the Carney funnel), ISO 14629 (flowability of ceramic powders) and other ASTM/powder‑metallurgy practice standards (for example test methods that define apparent density cup volume). Note: standards for the Carney funnel and some older editions have been revised or withdrawn in recent updates — users should check current status when specifying tests.
Keywords
Hall flowmeter, Hall funnel, flow rate, powder flow, flowability, metal powders, Carney funnel, apparent density, powder metallurgy, 50 g test portion, calibrated orifice
FAQ
Q: What is this standard?
A: ASTM B213‑25 is the 2025 edition of the test methods that specify how to measure the flow rate of free‑flowing metal powders using the calibrated Hall flowmeter funnel.
Q: What does it cover?
A: It covers apparatus requirements (Hall funnel and stand), funnel calibration and verification, sample mass and preparation (typically 50.0 g portions), step‑by‑step test procedure for timing powder discharge, result calculation and reporting requirements, and limitations on applicable powder types.
Q: Who typically uses it?
A: Powder producers, powder‑metallurgy component manufacturers, additive‑manufacturing feedstock labs, QC/inspection laboratories, materials engineers and procurement/specification teams use it to assess and specify powder flow behavior.
Q: Is it current or superseded?
A: ASTM B213‑25 is the current active edition, published February 1, 2025. It supersedes the previous edition (ASTM B213‑20, April 2020). Users should confirm they have the B213‑25 text when citing requirements.
Q: Is it part of a series?
A: Yes. B213 is part of a family of powder‑metallurgy test methods (ASTM Committee B09 series) covering flow, apparent density and related measurements. Related ASTM methods include B212 (apparent density using Hall funnel), B417 (Carney funnel for non‑free‑flowing powders) and other supporting practices and calibration standards.
Q: What are the key keywords?
A: Hall flowmeter, Hall funnel, flow rate, flowability, metal powders, powder metallurgy, calibrated orifice, 50.0 g test portion, apparent density, Carney funnel.