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Ferroalloys -- Experimental methods for checking the precision of sample division
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Basic data
| Standard ID | GB/T 28371-2012 (GB/T28371-2012) |
| Description (Translated English) | Ferroalloys -- Experimental methods for checking the precision of sample division |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | H42 |
| Classification of International Standard | 77.100 |
| Word Count Estimation | 8,876 |
| Quoted Standard | GB/T 4010; GB/T 28369 |
| Adopted Standard | ISO 7373-1987, MOD |
| Regulation (derived from) | National Standards Bulletin No. 9 of 2012 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This standard specifies the reduction of sub- checking the accuracy of ferroalloy sample test methods. Trials with large sample or sub- samples, and its large sample or sub- sample in accordance with the method specified in the relevant standard delivery |
GB/T 28371-2012: Ferroalloys -- Experimental methods for checking the precision of sample division
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Ferroalloys.Experimental methdos for checking the precision of sample division
ICS 77.100
H42
National Standards of People's Republic of China
ferroalloy
A test method for checking the shrinkage accuracy of a sample
Ferroaloys-
(ISO 7373. 1987, MOD)
2012-05-11 release
2013-02-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is modified using ISO 7373. 1987 "Ferroalloy - Test Method for Scaling Indication of Samples" (English version).
This standard structure and technical content (except for normative references) are consistent with ISO 7373. 1987; normative references
GB/T 4010 instead of ISO 4552, with GB/T 28369 instead of ISO 7087.
This standard is proposed by China Iron and Steel Industry Association.
This standard is under the jurisdiction of the National Technical Committee on Standardization of Pig Iron and Ferroalloys (SAC/TC318).
The drafting of this standard unit. Sinosteel Group Jilin Ferroalloy Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Liu Xiancheng, Wang Shuang, Chen Zhibin.
ferroalloy
A test method for checking the shrinkage accuracy of a sample
1 Scope
This standard specifies the test method for checking the shrinkage accuracy of ferroalloy samples. The test is carried out using a large sample or a pair of samples
Is taken in accordance with the method specified in the relevant standard from the ferroalloy delivery.
This standard applies to crusable ferroalloy samples and is not intended for use with drilled non-destructible ferroalloy samples.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 4010 Ferroalloy chemical analysis of the sample to take and preparation (GB/T 4010-1994, ISO 4552. 1987, MOD)
GB/T 28369 Ferroalloy evaluation Quality test method for quality fluctuation and inspection sampling accuracy (GB/T 28369-2012,
ISO 7087. 1984, MOD)
3 General requirements
3.1 large sample weight
GB/T 4010 provides ferrochromium, silicon chromium alloy, ferrosilicon, manganese silicon alloy and ferromanganese and other ferroalloy delivery batch weight should not be less than 100t,
GB/T 4010 in the provisions of iron, molybdenum, tungsten iron, ferroniobium and ferroalloy iron and other ferroalloy delivery batch weight should not be less than 5t, so for this test, large
The amount of sample is sufficient to produce the required weight of the sample.
3.2 Analytical methods
The sample analysis shall be carried out in accordance with the method specified in the relevant standards.
3.3 Quality characteristics
Check the quality characteristics of the sample shrinkage accuracy should be specified in the relevant standards.
Negotiated by the parties concerned, you can also use other elements as a quality feature.
3.4 Number of tests
Each ferrous alloy, whether large or sub-sample, should be tested at least 10 times.
Note. The sample can be taken to determine the quality of the delivery batch.
4 test method
4.1 Selection of test methods
4.1.1 For the physical properties of the use of one or two steps to prohibit the preparation of the sample of ferroalloy, if the continuous sample preparation process, the sample shrinkage
...
