GB/T 223.60-2024 PDF English
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Iron, steel and alloy - Determination of silicon content - Gravimetric method
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| GB/T 223.60-1997 | English | 70 |
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Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
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Methods for chemical analysis of iron, steel and alloy--The perchloric acid dehydration for the determination of silicon content
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GB/T 223.60-2024: Iron, steel and alloy - Determination of silicon content - Gravimetric method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT223.60-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.080.01
CCS H 11
Replacing GB/T 223.60-1997
Iron, steel and alloy - Determination of silicon content -
Gravimetric method
(ISO 439.2020, Steel and cast iron - Determination of silicon content -
Gravimetric method, MOD)
Issued on. APRIL 25, 2024
Implemented on. NOVEMBER 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
Introduction... 6
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 7
4 Principle... 7
5 Reagents... 8
6 Equipment... 9
7 Sampling... 9
8 Analysis steps... 9
9 Result presentation... 12
10 Test report... 13
Annex A (informative) Parts of GB/T 223... 15
Annex B (informative) Additional information for precision test... 21
Annex C (informative) Graphical representation of precision data... 24
Bibliography... 25
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document is Part 60 of GB/T 223.The published parts of GB/T 223 are listed in
Annex A.
This document replaces GB/T 223.60-1997 "Iron, steel and alloy - Determination of
silicon content - Gravimetric method". Compared with GB/T 223.60-1997, in addition
to structural adjustments and editorial changes, the main technical changes are as
follows.
a) The test material quantity has been changed (see 8.1 of this Edition; 7.1 of Edition
1997);
b) The amount of acid used for test material decomposition has been changed (see
8.3.1 of this Edition; 7.3.1 of Edition 1997);
c) The use volume of perchloric acid with different densities has been added (see
8.3.1 of this Edition);
d) The recommendation of chromium volatilization operation for specimens with
chromium content greater than 1% has been added (see 8.3.1 of this Edition);
e) The ignition temperature and time after volatilization of silicon dioxide has been
changed (see 8.3.4 of this Edition; 7.3.4 of Edition 1997);
f) The precision of the method has been changed (see 9.2 of this Edition; Chapter 9
of Edition 1997).
The modification of this document adopted ISO 439.2020 "Steel and cast iron -
Determination of silicon content - Gravimetric method".
Compared with ISO 439.2020, this document has made the following structural
adjustments.
- Add Annex A. Annex B corresponds to Annex A in ISO 439.2020, and Annex C
corresponds to Annex B in ISO 439.2020.
The technical differences between this document and ISO 439.2020 and their reasons
are as follows.
- The determination range (see Chapter 1) has been changed to increase the
applicability of this document;
- The reagent preparation was changed and related reagents were added (see Chapter
5) to adapt to the changes in the operating process;
- ISO 3696 (see Chapter 5) was replaced by the normative reference GB/T 6682 to
adapt to the national conditions of China;
- ISO 14284 (see Chapter 7) was replaced by the normative reference GB/T 20066
to adapt to the national conditions of China;
- The weighing mass of test material with high silicon content has been added (see
8.1), which is consistent with the determination range of this document;
- The volume of perchloric acid used when the test material mass is 0.5 g (see 8.3.1)
has been added to match the determination range of this document;
- The boron removal operation for boron-containing specimens (see 8.3.1) has been
added to meet the needs of different measurement objects;
- The precision of silicon content is added by 6.0% (see Table 2), which is consistent
with the measurement range of this document.
The following editorial changes were made to this document.
- To coordinate with the existing standards, the name of the standard is changed to
"Iron, steel and alloy - Determination of silicon content - Gravimetric method";
- Add notes to the determination section (see 8.3.1, 8.3.2, 8.3.4) to increase
operability and facilitate the application of this document;
- Add Annex A (informative) "Parts of GB/T 223".
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Iron and Steel Association.
This document shall be under the jurisdiction of National Technical Committee on Steel
of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this document. Baoshan Iron & Steel Co., Ltd., Steel
Research Institute Nake Testing Technology Co., Ltd., Tianjin Baotou Steel Rare Earth
Research Institute Co., Ltd., Hunan Valin Lianyuan Steel Co., Ltd., Chongqing Iron &
Steel Co., Ltd.
Main drafters of this document. Mu Lede, Zhang Yi, Luo Qianhua, Sun Xiaofei, Zhang
Xia, Yu Weihua, Yu Yongbo, Li Jie, Zhang Chenhui, Wang Anli, Cai Weiting, Shan
Qinghua, Zhang Li, Guo Wei, Pu Xuefen.
Versions of standard substituted by this document are.
- It was first published in 1981 as GB 223.5(I)-81.It was first revised in 1987 as GB
223.60-87.The second revised was in 1997;
- This is the third revision.
1 Scope
This document describes a method for the gravimetric determination of the silicon
content in iron, steel, high-temperature alloys and precision alloys.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 6682, Water for analytical laboratory use -- Specification and test methods
(GB/T 6682-2008, ISO 3696.1987, MOD)
3 Terms and definitions
There are no terms or definitions that require definition in this document.
4 Principle
The test material is dissolved in hydrochloric acid and nitric acid. The acid-soluble
silicon compound is converted into hydrated silicon dioxide by evaporating perchloric
acid until white smoke is emitted.
5 Reagents
Unless otherwise specified, only reagents confirmed to be analytically pure and grade
two water specified in GB/T 6682 are used in the analysis.
6 Equipment
Commonly used laboratory equipment and the following equipment.
Adjustable temperature range is 800℃~1100℃.
Medium-speed quantitative filter paper, with known low ash content.
7 Sampling
Sampling shall be carried out in accordance with GB/T 20066.
8 Analysis steps
In parallel with the test material determination, a blank test is performed following the
same steps, with the amounts of all reagents being the same as for the test material
determination.
9 Result presentation
The precision test of this document is carried out by 26 laboratories measuring 9 levels
of silicon. Each laboratory measured the silicon content at each level three times.
10 Test report
The test report shall include the following information.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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