SIST EN ISO 3923-1:2018

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

Название (английский):

Metallic powders - Determination of apparent density - Part 1: Funnel method (ISO 3923-1:2018)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 11 сентября 2018 г.
Издание:: ISO 3923-1:2018
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

EN ISO 3923-1:2018 - "Metallic powders - Determination of apparent density - Part 1: Funnel method" - specifies a standardized funnel procedure to determine the apparent density (bulk density in a loose condition) of metallic powders used in powder metallurgy. The method is intended for powders that flow freely through a 2.5 mm orifice and can be adapted for powders that need a 5.0 mm orifice. It defines required apparatus, sampling, test procedure, result calculation and reporting under controlled conditions.

Key topics and technical requirements

Scope: Apparent density measurement by the funnel method for metallic powders; powders that do not flow through a 5 mm orifice are covered by ISO 3923‑2.

Accepted 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 dimensions).

Cup and stand:

Cylindrical cup volume: 25 cm³ ± 0.03 cm³; internal diameter preferably 28 mm ± 0.5 mm (30 mm ±1 mm acceptable).
Funnel orifice mounted 25 mm ± 0.5 mm above cup on a vibration‑free stand, coaxial alignment required.

Apparatus material: Non‑magnetic, corrosion‑resistant metal with polished inner surfaces to avoid distortion and adhesion.

Balance accuracy: ±0.01 g.

Sample: Minimum sample volume 100 cm³ to permit three test portions.

Procedure highlights:

Fill cup by pouring powder through funnel until overflowing, level with a non‑magnetic straight‑edge without compression.
If necessary, use 5 mm funnel or initiate flow with a single poke using a 1 mm wire (wire must not enter the cup).
Tap cup lightly to settle powder for transport and weigh the powder mass.
Perform three determinations.

Result expression: Apparent density = mass / 25 cm³; report mean to nearest 0.01 g/cm³ and include range if scatter >1% of mean.

Precision:

Repeatability suspect if duplicate tests differ by >0.03 g/cm³ (95% confidence).
Reproducibility suspect if different labs differ by >0.05 g/cm³ (95% confidence).

Drying: Powder generally tested as‑received; drying permitted in vacuum or inert gas if oxidation is a concern; do not dry if volatiles present.

Applications and users

Practical for quality control, incoming inspection and process monitoring in powder metallurgy, metal additive manufacturing, MIM (metal injection molding) and component sintering processes.

Used by laboratories, manufacturers, material engineers, and procurement teams to assess powder flowability, packing behavior and to specify materials for forming, filling and sintering operations.

SIST EN ISO 3923-1:2018

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 3923-1:2018

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

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)