GB/T 20124-2006Steel and iron -- Determination of nitrogen content -- Thermal conductimetric method after fusion in a current of inert gas (English PDF)

Foreword

This Standard identically uses ISO 15351.1999 Steel and iron - Determination

of nitrogen content - Thermal conductimetric method after fusion in a current of

inert gas (Routine method).

This Standard is an identical translation of ISO 15351.1999.

For easy use, this Standard made the following editorial modifications.

a) modified "this International Standard" to "this Standard";

b) used decimal point "." to replace "," used as decimal point in ISO

15350.2000;

c) deleted the foreword of ISO 15351.1999.

Annex A, Annex B and Annex C of this Standard are informative.

This Standard was proposed by China Iron and Steel Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee

on Steel of Standardization Administration of China.

Main drafting organization of this Standard. Iron and Steel Research Institute.

Main drafter of this Standard. Hu Luofei.

Steel and iron - Determination of nitrogen content -

Thermal conductimetric method after fusion in a

current of inert gas (Routine method)

1 Scope

This Standard specifies a thermal conductimetric method after fusion under

inert gas for the determination of nitrogen in steel and iron.

The method is applicable to nitrogen contents between 0.002% (m/m) and 0.6%

(m/m).

2 Normative references

The following normative documents contain provisions which, through

reference in this text, constitute provisions of this Standard. For dated

references, subsequent amendments to, or revisions of, any of these

publications do not apply. However, parties to agreements based on this

Standard are encouraged to investigate the possibility of applying the most

recent editions of the normative documents indicated below. For undated

references, the latest edition of the normative document referred to applies.

ISO Guide 31 .1981, Contents of certificates of reference materials.

ISO Guide 35.1989, Certification of reference materials - General and

statistical principles.

ISO 385-1.1984, Laboratory glassware - Burettes - Part 1. General

requirements

ISO 648. 1977, Laboratory glassware - One-mark pipettes.

ISO 1042.1998, Laboratory glassware - One-mark volumetric flasks.

ISO 3696.1987, Water for analytical laboratory use - Specification and test

methods.

ISO 5725-1.1994, Accuracy (trueness and precision) of measurement

methods and results - Part 1. General principles and definitions.

ISO 5725-2.1994, Accuracy (trueness and precision) of measurement

......