GB/T 223.60-2024Iron, steel and alloy - Determination of silicon content - Gravimetric method (English PDF)

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.