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GB/T 20126-2006 (GB/T20126-2006)

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GB/T 20126-2006: PDF in English (GBT 20126-2006)

GB/T 20126-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.080.20
H 11
GB/T 20126-2006 / ISO 15349-2:1999
Unalloyed Steel – Determination of Low Carbon Content –
Part 2: Infrared Absorption Method after Combustion in an
Induction Furnace (with Preheating)
(ISO 15349-2;1999, IDT)
ISSUED ON: MARCH 02, 2006
IMPLEMENTED ON: SEPTEMBER 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Principle ... 5
4 Reagents and Materials ... 5
5 Apparatus ... 6
6 Sampling and Preparation of the Test Samples ... 7
7 Procedure ... 7
8 Expression of Results ... 11
Annex A (Informative) Features of Commercial High-Frequency Induction Furnaces
and Infrared Carbon Analyzers ... 13
Annex B (Informative) Additional Information on International Cooperative Tests ... 15
Annex C (Informative) Graphical Representation of Precision Data ... 18
Foreword
This Standard equivalently adopts ISO 15349-2:1999 Unalloyed Steel – Determination of Low
Carbon Content – Part 2: Infrared Absorption Method after Combustion in an Induction
Furnace (with Preheating).
This Standard equivalently translates ISO 15349-2:1999.
For the ease of use, this Standard made the following editorial modifications:
a) Change “this International Standard” into “this Standard”;
b) Use the “decimal point’ to replace the “comma”, which is used as the decimal point;
c) Delete the foreword of the international standard.
The Annexes A, B, C of this Standard are informative.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee on Iron and Steel
of Standardization Administration of China.
Chief drafting organization of this Standard: Wuhan Iron and Steel (Group) Corporation.
Chief drafting staffs of this Standard: Shen Ke, Liu Xiang, and Li Xiaojie.
Unalloyed Steel – Determination of
Low Carbon Content – Part 2: Infrared Absorption Method
after Combustion in an Induction Furnace (with Preheating)
1 Scope
This Standard specifies an infrared absorption method after combustion in an induction furnace
for the determination of the low carbon content in unalloyed steel.
The method is applicable to carbon contents between 0.000 3 % (m/m) and 0.010 % (m/m).
2 Normative References
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Standard. At the time of publication, the editions indicated are valid.
All standards are subject to revision. The parties who are using this Standard shall explore the
possibility of using the latest version of the following standards. For undated reference
documents, the latest versions apply to this Standard.
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 Methods and
Results – Part 2: Basic Method for the Determination of Repeatability and Reproducibility
of a Standard Measurement Method
ISO 5725-3:1994 Accuracy (Trueness and Precision) of Measurement Methods and
Results – Part 3: Intermediate Measurements of the Precision of a Standard Measurement
Method
ISO 14284:1996 Steel and Iron – Sampling and Preparation of Samples for the
Determination of Chemical Composition
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.