EN ISO 3908:2009
(Main)Hardmetals - Determination of insoluble (free) carbon - Gravimetric method (ISO 3908:2009)
Hardmetals - Determination of insoluble (free) carbon - Gravimetric method (ISO 3908:2009)
ISO 3908:2009 specifies a gravimetric method for the determination of the mass fraction of insoluble (free) carbon in carbides and hardmetals.
This method is applicable to
carbides of hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium,
mixtures of these carbides and binder metals, free of lubricant, and
all grades of presintered or sintered hardmetals, produced from these carbides,
having a mass fraction of insoluble carbon between 0,02 % and 0,5 %.
Hartmetalle - Bestimmung des unlöslichen (freien) Kohlenstoff-Gehaltes - Gravimetrisches Verfahren (ISO 3908:2009)
Diese Internationale Norm legt ein gravimetrisches Verfahren zur Bestimmung des unlöslichen (freien) Kohlenstoffgehaltes (Massenanteiles) von Carbiden und Hartmetallen fest.
Dieses Verfahren ist anwendbar bei
- Hafnium-, Molybdän-, Niob-, Tantal-, Titan-, Vanadium-, Wolfram- und Zirkoncarbiden,
- Gemischen aus diesen Carbiden und Bindemetallen, frei von Bindemitteln, und
- allen Arten vorgesinterter oder gesinterter Hartmetalle, die aus diesen Carbiden erzeugt wurden,
mit einem Gehalt an unlöslichem Kohlenstoff zwischen 0,02 % (Massenanteil) und 0,5 % (Massenanteil).
Métaux-durs - Dosage du carbone insoluble (libre) - Méthode gravimétrique (ISO 3908:2009)
L'ISO 3908:2009 spécifie une méthode gravimétrique de dosage du carbone insoluble (libre) [fraction massique de carbone insoluble (libre)] dans les carbures et les métaux-durs.
Elle est applicable aux
― carbures de hafnium, molybdène, niobium, tantale, titane, vanadium, tungstène et zirconium,
― mélanges de ces carbures et de métaux liants non lubrifiés,
― métaux-durs de toutes nuances, préfrittés ou frittés, produits de ces carbures,
dont la fraction massique de carbone insoluble est comprise entre 0,02 % et 0,5 %.
Trdine - Določevanje netopnega (prostega) ogljika - Gravimetrijska metoda (ISO 3908:2009)
General Information
- Status
- Published
- Publication Date
- 30-Sep-2009
- Withdrawal Date
- 29-Apr-2010
- 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
- 01-Oct-2009
- Completion Date
- 01-Oct-2009
Relations
- Effective Date
- 08-Jun-2022
Overview
EN ISO 3908:2009 outlines a standardized gravimetric method for the precise determination of insoluble (free) carbon content in hardmetals and carbides. Developed by the International Organization for Standardization (ISO) under technical committee ISO/TC 119 "Powder metallurgy," this method replaces the earlier EN 23908:1993 standard. It is applicable across a range of carbides and their mixtures with binder metals, essential in the manufacturing and quality control of presintered or sintered hardmetals.
The standard is relevant for carbides of hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten, and zirconium and their binder metal mixtures, specifically for insoluble carbon mass fractions ranging between 0.02% and 0.5%. The gravimetric approach ensures reliable quantification of free carbon, which is critical in determining the physical and chemical properties of hardmetals used in industrial applications.
Key Topics
Scope of Application
Applicable to carbides and hardmetals free of lubricants, including both presintered and sintered grades.Principle
Decomposition of the hardmetal sample to isolate insoluble carbon, followed by gravimetric measurement through combustion and carbon dioxide quantification.Reagents and Safety
Use of nitric acid (ρ=1.20 g/ml) and hydrofluoric acid (ρ=1.12 g/ml) for sample dissolution. Strict safety protocols must be followed due to the hazardous nature of hydrofluoric acid.Analytical Apparatus
Involves specialized equipment such as a platinum dish, ceramic or refractory fibrous filter devices (Gooch crucible), and vacuum filtration assembly.Procedure Summary
Crushing and sieving of samples, acid digestion on a steam bath, vacuum filtration to collect insoluble carbon particles, followed by combustion in an oxygen stream at ~1200 °C.Calculation and Results
Calculation of mass fraction of insoluble carbon using the mass of carbon dioxide released, with defined tolerances ensuring precision across multiple determinations.Test Reporting Requirements
Comprehensive documentation including reference to this standard, sample details, results, deviations, and any procedural anomalies.
Applications
EN ISO 3908:2009 is integral for manufacturers and quality control laboratories involved in:
Hardmetal Production
Ensuring correct free carbon content to optimize mechanical strength, wear resistance, and other critical properties in cutting tools, mining equipment, and wear parts.Powder Metallurgy Industry
Validating raw material suitability and finished product conformity for high-performance alloys and composite materials.Materials Research
Analyzing carbides and their composites for development of new grades of hardmetals with tailored physical and chemical characteristics.Regulatory Compliance
Fulfilling European and international quality standards for hardmetal products.
Related Standards
ISO 3907:2009 - Specifies a gravimetric method for the determination of total carbon in hardmetals, which complements the free carbon analysis defined in ISO 3908.
EN 23908:1993 - The superseded version of this standard, replaced by EN ISO 3908:2009 for updated methodology and requirements.
ISO/IEC Directives, Part 2 - Governs the drafting and approval process for International Standards, ensuring consistency across procedures such as those described in EN ISO 3908:2009.
Keywords: EN ISO 3908:2009, free carbon determination, gravimetric method, hardmetals, carbides, powder metallurgy, insoluble carbon, metallurgical analysis, quality control, sintered hardmetals, carbide analysis.
Frequently Asked Questions
EN ISO 3908:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Hardmetals - Determination of insoluble (free) carbon - Gravimetric method (ISO 3908:2009)". This standard covers: ISO 3908:2009 specifies a gravimetric method for the determination of the mass fraction of insoluble (free) carbon in carbides and hardmetals. This method is applicable to carbides of hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium, mixtures of these carbides and binder metals, free of lubricant, and all grades of presintered or sintered hardmetals, produced from these carbides, having a mass fraction of insoluble carbon between 0,02 % and 0,5 %.
ISO 3908:2009 specifies a gravimetric method for the determination of the mass fraction of insoluble (free) carbon in carbides and hardmetals. This method is applicable to carbides of hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium, mixtures of these carbides and binder metals, free of lubricant, and all grades of presintered or sintered hardmetals, produced from these carbides, having a mass fraction of insoluble carbon between 0,02 % and 0,5 %.
EN ISO 3908:2009 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 3908:2009 has the following relationships with other standards: It is inter standard links to EN 23908:1993. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 3908:2009 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-december-2009
1DGRPHãþD
SIST EN 23908:2000
7UGLQH'RORþHYDQMHQHWRSQHJDSURVWHJDRJOMLND*UDYLPHWULMVNDPHWRGD,62
Hardmetals - Determination of insoluble (free) carbon - Gravimetric method (ISO
3908:2009)
Hartmetalle - Bestimmung des unlöslichen (freien) Kohlnestoffgehaltes - Gravimetrisches
Verfahren (ISO 3908:2009)
Métaux-durs - Dosage du carbone insoluble (libre) - Méthode gravimétrique (ISO
3908:2009)
Ta slovenski standard je istoveten z: EN ISO 3908:2009
ICS:
77.160 Metalurgija prahov Powder metallurgy
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 3908
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2009
ICS 77.160 Supersedes EN 23908:1993
English Version
Hardmetals - Determination of insoluble (free) carbon -
Gravimetric method (ISO 3908:2009)
Métaux-durs - Dosage du carbone insoluble (libre) - Hartmetalle - Bestimmung des unlöslichen (freien)
Méthode gravimétrique (ISO 3908:2009) Kohlenstoffgehaltes - Gravimetrisches Verfahren (ISO
3908:2009)
This European Standard was approved by CEN on 29 September 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3908:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 3908:2009) 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 April 2010, and conflicting national standards shall be withdrawn at the
latest by April 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 23908:1993.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 3908:2009 has been approved by CEN as a EN ISO 3908:2009 without any modification.
INTERNATIONAL ISO
STANDARD 3908
Third edition
2009-10-01
Hardmetals — Determination of insoluble
(free) carbon — Gravimetric method
Métaux-durs — Dosage du carbone insoluble (libre) — Méthode
gravimétrique
Reference number
ISO 3908:2009(E)
©
ISO 2009
ISO 3908:2009(E)
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ISO 3908:2009(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
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