EN 1976-2012 pdf download.Copper and copper alloys – Cast unwrought copper products.
7 Sampling
7.1 Arrangement of lots for sampling purposes
For refinery shapes produced in a batch process, the manufacturer shall arrange lots fo sampling purposes so that, as far as possible, each lot contains pieces from one furnace charge or production batch only.
For refinery shapes produced in a continuous process, the manufacturer shall arrange lots so that, as far as possible, each lot contains pieces produced consecutively from the process.
NOTE A lot is the number of, or aggregate mass of. Individual refinery shapes. appropnate to the total amount ordered and to the means of shipment, which constitutes a unit for samphng purposes.
7.2 Inspection lots for analysis and physical testing
Fo the routine sampling of refinery shapes for analysis or bc the routine determination of physical properties, the method and rate of sampling each inspection lot shall be at the discretion of the sampler, unless otherwise specified by the purchaser.
In cases of dispute concerning the analysis or physical properties, the method and rate of sampling each inspection lot shall be agreed between the supplier, the purchaser, and if necessary, any mutually accepted arbitrator.
Analysis shall be carried out on the sample(s) obtained in accordance with 7.2.
The copper content of Cu-OFE (CROO9A) and Cu-PHCE (CRO22A) shall be determined by subtracting the total percentage of the concentrations of the specified impurities present from 100 % (see Table 1). For routine quality control purposes, the composition shall be determined using generally recognised analytical techniques.
In cases of dispute concerning the results of analysis, the method(s) of analysis to be used shall be agreed between the supplier, the purchaser and, if necessary, any mutually accepted arbitrator, and shall be for all the impurities for which limits are specified in Table 1.
For expression of results, the rounding rules given in 8.3 shall be used.
8.2 Physical tests
8.2.1 Mass resistivity
For the routine determination of the mass resistivity, the test methods used shall be left to the discretion of the tester.
In cases of dispute, the mass resistivity shall be determined on a representative sample from each inspection lot (see 7.2). External oxide shall be removed from the sample which shall then be rolled and/or drawn to a (2,00 ± 0,01) mm diameter wire.
The sample may be hot-worked initially, provided care is taken to avoid contamination or excessive oxidation.
The wire shall be degreased and annealed at (500 ± 10) C for 30 mm in an inert atmosphere and the mass resistivity test carried out in accordance with IEC 60468.
NOTE Information on the relationship between the mass resistivity and the corresponding values for volume resistivity and conductivity is given in Annex B.
8.2.2 Hydrogen embrittlement
When a hydrogen embrittlement test is carried out (see Table 6), the specimens prepared from a representative sample from each inspection lot (see 7.2) shall be forged, or hot rolled, and cold drawn into wire or strip (2,00 ± 0,05) mm diameter or thickness.
The hydrogen embnttlement test shall be carried out in accordance with EN ISO 2626.
The types of bend tests to be carried out at the conclusion of the procedure depend upon the copper grade and shall be in accordance with Table 6.
8.3 Rounding of results
For the purpose of determining conformity to the limits specified in this standard for composition or for electrical resistivity, an observed or a calculated value obtained from a test shall be rounded in accordance with the following procedure, which is based upon the guidance given in Annex B of ISO 80000-1:2009. It shall be rounded in one step to the same number of figures used to express the specified limit in this standard.
The following wles shall be used for rounding:
a) if the figure immediately after the last figure to be retained is less than 5, the last figure to be retained shall be kept unchanged;
b) if the figure immediately after the last figure to be retained is equal to or greater than 5. the last figure to be retained shall be increased by one.
9 Declaration of conformity and inspection documentation
9.1 Declaration of conformity
When requested by the purchaser [see 5 j)] and agreed with the supplier, the supplier shall issue for the product the appropriate declaration of conformity in accordance with EN 1655.
9.2 Inspection documentation
When requested by the purchaser (see 5 k)J and agreed with the supplier, the supplier shall issue for the product the appropriate inspection document, in accordance with EN 10204.
10 Marking
All refinery shapes, with the exception of ingots, shall be permanently mailced with the manufacturers brand and furnace charge mark or production number. Ingots shall have a brand stamped or cast-in, but need not have a furnace charge mark unless otherwise specified by the purchaser [see 5 h)1.EN 1976-2012 pdf download.