EN-1981 pdf free download

EN-1981 pdf free download. Copper and copper alloys – Master alloys.
4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1 1 90-1 . NOTE Although material symbol designations used in this standard might be the same as those in other standards using the designation system given in ISO 11 90-1 , the detailed composition requirements are not necessarily the same. 4.1.3 Number The material number designation is in accordance with the system given in EN 1 41 2. 4.2 Product The product designation provides a standardised pattern of designation from which a rapid and unequivocal description of a product is conveyed in communication. It provides mutual comprehension at the international level with regard to products which meet the requirements of the relevant European Standard. The product designation is no substitute for the full content of the standard. The product designation for products to this standard shall consist of:  denomination (Copper master alloy);  number of this European Standard (EN 1 981 );  material designation, either symbol, or number (see Table 1 );  material form (the following designations shall be used as appropriate: ING for ingots, NOB for notched bars, NOS for notched slabs, GRN for granules and BPS for broken pieces) (see 6.2). The derivation of a product designation is shown in the following example. 7 Sampling 7.1 General When required (e.g., if necessary in accordance with specified procedures of a supplier’s quality system, or when the purchaser requests inspection documents with test results, or for use in cases of dispute), an inspection lot shall be sampled in accordance with 7.2 or 7.3. 7.2 Cast analysis For routine control purposes a sample representative of each cast shall be taken from the furnace, or crucible, during the process of casting, and poured into a clean permanent mould of dimensions appropriate to the chosen method of analysis. 7.3 Cases of dispute In cases of dispute concerning the composition of a master alloy in a consignment, the method of sampling shall be agreed between the disputing parties. 8 Methods of analysis 8.1 Routine cast analysis The routine methods of analysis carried out on the sample obtained in accordance with 7.2, to verify conformity of the cast of master alloy to this standard, shall be at the discretion of the supplier. 8.2 Determination of chromium(III)-oxide in alloy CuCr10 (CM202E) For alloy CuCr1 0 (CM202E), the method recommended for the determination of Cr 2 O 3 is given in annex A. NOTE A qualitative assessment can be made by examining a polished microsection, under polarized light, at × 250 magni- fication. 8.3 Cases of dispute In cases of dispute concerning the results of analysis of a master alloy, the procedure shall be agreed between the disputing parties. 8.4 Rounding of results For the purpose of determining conformity to the compositional limits specified in this standard, the result obtained from analysis shall be rounded in accordance with the following procedure, which is based upon the guidance given in annex B of ISO 31 -0:1 992. It shall be rounded in one step to the same number of figures used to express the specified limit in Table 1 . The following rules 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 f)] and agreed with the supplier, the supplier shall issue for the products the appropriate declaration of conformity in accordance with EN 1 655.EN-1981  pdf download.