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GB/T 28371-2012 English PDF

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GB/T 28371-2012: Ferroalloys -- Experimental methods for checking the precision of sample division
Status: Valid
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GB/T 28371-2012English189 Add to Cart 3 days [Need to translate] Ferroalloys -- Experimental methods for checking the precision of sample division Valid GB/T 28371-2012

PDF similar to GB/T 28371-2012


Standard similar to GB/T 28371-2012

GB/T 28296   GB/T 25050   GB/T 25051   GB/T 25049   GB/T 28372   GB/T 28369   

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 8,815
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

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