ISO-1811-2-1988.pdf
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1、 IS0 1811-2 : 1988 (E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in
2、a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commis
3、sion (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures
4、 requiring at least 75 % approval by the member bodies voting. International Standard IS0 1811-Z was prepared by Technical Committee ISO/TC 26, Copper and copper alloys. Together with IS0 1811-1 and 1811-3, it cancels and replaces IS0 Recommendation R 1811 : 1971, of which it constitutes a technical
5、 revision. IS0 1811 consists of the following parts, under the general title Copper and copper alloys - Selection and preparation of samples for chemical analysis: - Part 7 : Sampling of cast unwrought products - Part 2 : Sampling of wrought products and castings - Part 3 : Sampling of cathodes 0 In
6、ternational Organization for Standardization, 1999 0 Printed in Switzerland INTERNATIONAL STANDARD IS0 1811-2 : 1988 (E) Copper and copper alloys - Selection and preparation of samples for chemical analysis - Part 2 : Sampling of wrought products and castings 1 Scope This part of IS0 1811 specifies
7、methods for the selection and preparation of samples for chemical analysis of copper and copper alloys in the form of wrought products and castings.1) The methods specified in this part of IS0 1811 apply to copper and copper alloys in the following forms, and are intended to determine compliance wit
8、h the requirements for their chemical composition : a) wrought products, including plate, sheet, strip, rod, bar, tube, profile, forgings, etc.; b) castings, including sand castings, chill castings, die castings, continuous castings, centrifugal castings. 2 Normative references The following standar
9、ds contain provisions which, through reference in this text, constitute provisions of this part of IS0 1811. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 1811 are encouraged to investigate th
10、e possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 main- tain registers of currently valid International Standards. IS0 197-1 : 1993, Copper and copper alloys - Terms and definitions - Part 7: Materials. IS0 197-3 : 1993, Copper and copper alloys
11、 - Terms and definitions - Pert 3: Wrought products. IS0 197-4 : 1993, Copper and copper alloys - Terms and definitions - Part 4: Castings. IS0 181 l-l : 1999, Copper and copper alloys - Selection and preparation of samples for chemical analysis - Part 7: Sam- pling of unwrought products. I) Samplin
12、g theory is explained in annex A of IS0 181 l-l. 3 Definitions For the purposes of this part of IS0 1811, the definitions for copper and copper alloys in IS0 197-1, for wrought products in IS0 197-3 and for castings in IS0 197-4 apply. In addition, the following definitions apply. 3.1 lot: Unless ot
13、herwise agreed between supplier and pur- chaser, for the purpose of sampling, a lot shall be defined as follows: 3.1.1 lot of wrought products: Material of the same alloy and of a particular form, such as plate, sheet, strip, rod, bar, tube, profile, wire or forgings, made during the same produc- ti
14、on sequence under uniform conditions. Materials processed under different conditions shall be con- sidered as separate lots. 3.1.2 lot of castings: Material of a particular form produced by, for instance, sand casting, chill casting, die casting or cen- trifugal casting from a single melting furnace
15、 charge or from a particular cycle of a continuous melting furnace. 3.2 sampling unit: An individual wrought product or casting selected from a lot. 3.3 gross sample: The total amount of all sampling units taken from a lot. 3.4 test sample: A sample prepared from the gross sample and from which the
16、test portions will be taken. 3.5 test portion: The quantity of material taken from the test sample and on which the analysis is actually carried out. 1 -,-,- IS0 1811-2 : 1888 (EI 4 Selection of sampling units Unless otherwise agreed between supplier and purchaser, the following number of sampling u
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