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GB/T 25050-2010 (GB/T25050-2010)

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GB/T 25050-2010English310 Add to Cart 0-9 seconds. Auto-delivery. Ferronickel ingots or pieces -- Sampling for analysis Valid

Standards related to: GB/T 25050-2010

GB/T 25050-2010: PDF in English (GBT 25050-2010)

GB/T 25050-2010
ICS 77.100
H 42
GB/T 25050-2010 / ISO 8050:1988
Ferronickel ingots or pieces - Sampling for analysis
(ISO 8050:1988, IDT)
Issued by: General Administration of Quality Supervision, Inspection and
Standardization Administration of the People's Republic of
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Sampling of each heat at the producer's plant ... 4 
4 Sampling of a lot of ingots or pieces ... 6 
5 Treatment of laboratory samples ... 8 
Annex A (normative) Number of small ingots to be taken and number to be
analysed ... 11 
Annex B (informative) Methods for taking a sample of size N in a supply of M
items ... 13 
Annex C (informative) Formulae giving the number N of ingots or pieces to be
taken to form the primary sample ... 18 
Annex D (informative) Technical conditions for drilling and milling ... 23 
This Standard identically adopts the international standard ISO 8050:1988
"Ferronickel ingots or pieces - Sampling for analysis" (English version).
For ease of use, this Standard made the following editorial modifications:
- modified "this International Standard" to "this Standard";
- used decimal point "." to replace comma "," that was used as decimal point;
- deleted the foreword of ISO 8050:1988;
- used Chinese standards as normative references.
Annex A of this Standard is normative. Annex B, Annex C and Annex D are
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee
on Pig Iron and Ferroalloys of Standardization Administration of China.
The drafting organizations of this Standard: Shanxi Taigang Stainless Steel Co.,
Main drafters of this Standard: Liu Aikun, Wang Jun, Dai Xueqian, Liu Wei.
Ferronickel ingots or pieces - Sampling for analysis
1 Scope
This Standard specifies a method for sampling for analysis of ferronickel ingots
or pieces.
This Standard is applicable to sampling for analysis of ferronickel ingots or
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 21933.1, Ferronickel - Determination of nickel content - The
dimethylglyoxime gravimetric method (GB/T 21933.1-2008, ISO 6352: 1985,
GB/T 25049, Ferronickel (GB/T 25049-2010, ISO 6501: 1988, MOD)
3 Sampling of each heat at the producer's plant
3.1 Sample taking
3.1.1 Each increment1) shall be taken using a spoon and cast in a mould to
obtain a suitable small ingot for chemical or physical analysis. The usual
geometry of such ingots is that of a frustum. It is desirable that the dimensions
lie within the following limits:
- height: 100 ~ 140 mm;
- upper diameter: 35 ~ 50 mm;
- lower diameter: 30 ~ 40 mm.
1) Increment: portion of the lot taken in a single operation; in this standard: portion of molten metal.
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.