ISO 3923-1:2018

Name: ISO 3923-1:2018 — Metallic powders — Determination of apparent density — Part 1: Funnel method
SKU: ISO 3923-1:2018
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Metallic powders — Determination of apparent density — Part 1: Funnel method

Название (английский):

ISO 3923-1:2018

Metallic powders — Determination of apparent density — Part 1: Funnel method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 9 мая 2018 г.
Издание:: ISO IS 3923 edition 4 version 1
ICS:: 77.160

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Описание (английский):

This document specifies the funnel method for the determination of the apparent density of metallic powders under standardized conditions. The method is intended for metallic powders that flow freely through a 2,5 mm diameter orifice. It can, however, be used for powders that flow with difficulty through a 2,5 mm diameter orifice but flow through a 5 mm diameter orifice. Methods for the determination of the apparent density of powders that will not flow through a 5 mm diameter orifice are specified in ISO 3923‑2[1].

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3923-1:2018 specifies the funnel method for determining the apparent density of metallic powders under standardized conditions. The method measures the bulk mass per unit volume (apparent density, g/cm³) of powders that flow freely through a 2.5 mm orifice, and can also be applied to powders that only flow through a 5.0 mm orifice. The standard defines equipment, sample preparation, test procedure, calculation, repeatability/reproducibility limits and reporting requirements for consistent apparent-density (bulk-density) testing in powder metallurgy.

Key topics and requirements

Scope: Applies to metallic powders that pass through a 2.5 mm or, if required, a 5.0 mm orifice; powders that will not flow through 5.0 mm are covered by ISO 3923‑2.

Permitted funnels:

Hall funnel: 2.5 mm orifice, 60° cone (ISO 4490)
Gustavsson funnel: 2.5 mm orifice, 30° cone (ISO 13517)
Carney funnel: 5.0 mm orifice, 60° cone (Annex A / ASTM B417)

Apparatus & dimensions:

Cylindrical receiver capacity (25 ± 0.03) cm³; preferred internal diameter (28 ± 0.5) mm (30 ± 1 mm acceptable).
Funnel positioned (25 ± 0.5) mm above receiver rim and concentric.
Balance accuracy: ±0.01 g.
Apparatus made of non-magnetic, corrosion-resistant material with polished interiors.

Sample & preparation:

Minimum sample volume: 100 cm³ (to allow three test runs).
Powder normally tested as received; if drying is needed and powder can oxidize, dry under vacuum or inert atmosphere. Do not dry powders containing volatiles.

Procedure:

Pour powder through specified funnel into receiver until overflow, trim flush with a non-magnetic scraper in one pass (no compaction), tap to settle, weigh to ±0.01 g.
Perform three determinations.

Result expression & fidelity:

Apparent density ρ = m / V (g/cm³). Report arithmetic mean of three results to 0.01 g/cm³.
Flag results if dispersion >1% of mean; repeatability threshold: 0.03 g/cm³ (same operator/equipment); reproducibility threshold: 0.05 g/cm³ (different labs) at 95% confidence.

Reporting: Must include ISO reference, sample identification, drying method (if used), funnel/orifice/angle, use of any metal wire to initiate flow, results and any deviations/incidents.

Applications and users

Who uses it: Powder metallurgy labs, quality control technicians, R&D teams, additive manufacturing (metal powder) suppliers and purchasers, and materials testing laboratories.

Practical uses:

Characterizing powder bulk/apparent density for process control (pressing, sintering, powder feeding).
Comparing lot-to-lot consistency for metal powders used in additive manufacturing, cold/hot pressing, and thermal spray.
Specifying material properties for purchase agreements and quality records.

Related standards

ISO 3923-2 - Apparent density by Scott volumeter (for non‑flowing powders)

ISO 4490 - Hall funnel flow time

ISO 13517 - Gustavsson funnel flow time

ASTM B417 - Carney funnel dimensions

Keywords: ISO 3923-1:2018, metallic powders, apparent density, funnel method, Hall funnel, Gustavsson, Carney funnel, powder metallurgy, bulk density testing, powder flow.

ISO 3923-1:2018

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 3923-2:1981

Metallic powders — Determination of apparent density — Part 2: Scott volumeter method

SIST EN ISO 4490:2018

Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)

BS EN ISO 13517:2020

Metallic powders. Determination of flow rate by means of a calibrated funnel (Gustavsson flowmeter).

SIST EN 23923-2:2000

Metallic powders - Determination of apparent density - Part 2: Scott volumeter method (ISO 3923-2:1981)