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ISO 3908:2009

Hardmetals — Determination of insoluble (free) carbon — Gravimetric method

Sep 29, 2009

General information

90.93     Dec 12, 2025

ISO

ISO/TC 119/SC 4

International Standard

77.160  

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Scope

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 %.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 3908:1985

NOW

PUBLISHED
ISO 3908:2009
90.93 Standard confirmed
Dec 12, 2025

National adoptions

SRPS EN ISO 3908:2011  
ISS

Hardmetals - Determination of insoluble (free) carbon - Gravimetric method (ISO 3908:2009)

60.60   Standard published

C119 more