EN ISO 4490:2018
(Main)Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)
Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)
ISO 4490:2018 specifies a method for determining the flow rate of metallic powders, including powders for hard metals, by means of a calibrated funnel (Hall flowmeter).
The method is applicable only to powders which flow freely through the specified test orifice.
Metallpulver - Bestimmung der Durchflussrate mit Hilfe eines kalibrierten Trichters (Hall flowmeter) (ISO 4490:2018)
Dieses Dokument legt ein Verfahren zur Bestimmung der Durchflussrate metallischer Pulver, einschließlich Hartmetallpulver, mit Hilfe eines kalibrierten Trichters (Hall flowmeter) fest.
Dieses Verfahren ist nur auf Pulver anwendbar, die frei durch die festgelegte Ausflussöffnung fließen.
Poudres métalliques - Détermination du temps d'écoulement au moyen d'un entonnoir calibré (appareil de Hall) (ISO 4490:2018)
L'ISO 4490:2018 spécifie une méthode de détermination du temps d'écoulement des poudres métalliques, y compris les poudres pour métaux durs, au moyen d'un entonnoir calibré (appareil de Hall).
La méthode n'est applicable qu'aux poudres qui s'écoulent librement par l'orifice d'essai spécifié.
Kovinski praški - Ugotavljanje pretočnosti s pomočjo umerjenega lijaka (Hallov merilnik) (ISO 4490:2018)
Ta dokument določa metodo za ugotavljanje pretočnosti kovinskih praškov, vključno s praški za trde kovine, s pomočjo umerjenega lijaka (Hallov merilnik).
Metoda se uporablja samo za praške, ki so prosto pretočni skozi določeno preskusno odprtino.
General Information
- Status
- Published
- Publication Date
- 29-May-2018
- Withdrawal Date
- 29-Nov-2018
- Technical Committee
- CEN/SS M11 - Powder metallurgy
- Drafting Committee
- CEN/SS M11 - Powder metallurgy
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 30-May-2018
- Completion Date
- 30-May-2018
Relations
- Effective Date
- 01-Jul-2015
Overview
EN ISO 4490:2018 (ISO 4490:2018) specifies a standardized test method for measuring the flow rate of metallic powders using a calibrated funnel, commonly called the Hall flowmeter. The method quantifies how long it takes for a 50 g test portion of a freely flowing metallic powder (including powders for hard metals) to pass through a standardized orifice. It applies only to powders that flow freely through the specified test orifice.
Key Topics and Requirements
- Principle: Measurement of elapsed time for 50 g of powder to flow through a calibrated funnel (reported as seconds per 50 g).
- Apparatus:
- Calibrated funnel (Hall flowmeter) of standardized dimensions made from non‑magnetic, corrosion‑resistant metal with adequate hardness and wall thickness.
- Rigid stand with a vibration‑free base.
- Balance with accuracy of ±0.05 g.
- Timing device with accuracy of ±0.1 s.
- Reference grit (reference powder) for funnel calibration.
- Calibration:
- Manufacturer supplies a calibrated funnel. Reference grit is dried at 110 °C for 60 min, cooled in a desiccator, and five determinations are made on 50 g until five values fall within 0.4 s. The average (nominally 40.0 s ± 0.5 s/50 g) is stamped on the funnel.
- Users should periodically verify calibration. If reference flow deviates, a correction factor (40.0 ÷ measured value) may be applied; investigate cause (wear or coating). Discontinue use if reference flow < 37 s.
- Sampling & test portions:
- Test sample: minimum 200 g (usually tested as‑received unless drying is agreed and safe for the powder).
- Test portion: 50 g ±0.1 g; perform three determinations.
- Procedure:
- Fill funnel with test portion, keep orifice closed, then open and start timing; stop when last powder leaves orifice. A single slight tap to start flow is allowed. If powder does not flow or stops, it is considered non‑flowable by this method.
- Results & precision:
- Report the arithmetic mean of three determinations (seconds per 50 g), rounded to the nearest second; apply any calibration correction factor.
- ISO 4490:2018 includes an inter‑laboratory precision statement (repeatability and reproducibility standard deviations provided for representative iron and stainless powders).
Applications and Users
- Used in powder metallurgy, additive manufacturing, metal injection moulding, and quality control for metal powders where flowability affects dosing, filling, and compaction.
- Primary users: materials test laboratories, powder producers, R&D teams, and quality engineers specifying or verifying powder flow properties.
Related Standards
- Prepared by ISO/TC 119 (Powder metallurgy), this edition supersedes EN ISO 4490:2014. It complements other powder metallurgy test standards addressing particle size, apparent density, and compaction behaviour.
Keywords: EN ISO 4490:2018, ISO 4490, Hall flowmeter, calibrated funnel, metallic powders, flow rate, powder metallurgy, flowability, calibration.
Frequently Asked Questions
EN ISO 4490:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)". This standard covers: ISO 4490:2018 specifies a method for determining the flow rate of metallic powders, including powders for hard metals, by means of a calibrated funnel (Hall flowmeter). The method is applicable only to powders which flow freely through the specified test orifice.
ISO 4490:2018 specifies a method for determining the flow rate of metallic powders, including powders for hard metals, by means of a calibrated funnel (Hall flowmeter). The method is applicable only to powders which flow freely through the specified test orifice.
EN ISO 4490:2018 is classified under the following ICS (International Classification for Standards) categories: 77.160 - Powder metallurgy. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 4490:2018 has the following relationships with other standards: It is inter standard links to EN ISO 4490:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 4490:2018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2018
1DGRPHãþD
SIST EN ISO 4490:2014
.RYLQVNLSUDãNL8JRWDYOMDQMHSUHWRþQRVWLVSRPRþMRXPHUMHQHJDOLMDND +DOORY
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Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall
flowmeter) (ISO 4490:2018)
Metallpulver - Bestimmung der Durchflussrate mit Hilfe eines kalibrierten Trichters (Hall
flowmeter) (ISO 4490:2018)
Poudres métalliques - Détermination du temps d'écoulement au moyen d'un entonnoir
calibré (appareil de Hall) (ISO 4490:2018)
Ta slovenski standard je istoveten z: EN ISO 4490:2018
ICS:
77.160 Metalurgija prahov Powder metallurgy
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 4490
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2018
EUROPÄISCHE NORM
ICS 77.160 Supersedes EN ISO 4490:2014
English Version
Metallic powders - Determination of flow rate by means of
a calibrated funnel (Hall flowmeter) (ISO 4490:2018)
Poudres métalliques - Détermination du temps Metallpulver - Bestimmung der Durchflussrate mit
d'écoulement au moyen d'un entonnoir calibré Hilfe eines kalibrierten Trichters (Hall flowmeter) (ISO
(appareil de Hall) (ISO 4490:2018) 4490:2018)
This European Standard was approved by CEN on 23 March 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4490:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 4490:2018) has been prepared by Technical Committee ISO/TC 119 "Powder
metallurgy".
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2018, and conflicting national standards
shall be withdrawn at the latest by November 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4490:2014.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4490:2018 has been approved by CEN as EN ISO 4490:2018 without any modification.
INTERNATIONAL ISO
STANDARD 4490
Fifth edition
2018-04
Metallic powders — Determination
of flow rate by means of a calibrated
funnel (Hall flowmeter)
Poudres métalliques — Détermination du temps d'écoulement au
moyen d'un entonnoir calibré (appareil de Hall)
Reference number
ISO 4490:2018(E)
©
ISO 2018
ISO 4490:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2018 – All rights reserved
ISO 4490:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Calibration of the funnel. 3
6.1 Calibration by the manufacturer of the funnel . 3
6.2 Calibration by the user of the funnel. 3
7 Sampling . 4
7.1 General . 4
7.2 Test sample weight . 4
7.3 Test portion weight . 4
7.4 Number of test portions . 4
8 Procedure. 4
9 Expression of results . 4
10 Precision . 5
11 Test report . 5
Bibliography . 7
ISO 4490:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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electrotechnical standardization.
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