BS EN 13605:2021 pdf free download – Copper and copper alloys一Copper profiles and profiled wire for electrical purposes.
7.3 Mechanical, electrical and hydrogen embrittlement tests
Unless otherwise specified, the sampling rate for each of the tests in 8.2 to 8.5 shall be in accordance with Table 14. Sampling units shall be selected from the finished products. The test samples shall be cut from the sampling units. Test samples, and test pieces prepared from them, shall not be subjected to any further treatment, other than any machining operations necessary in the preparation of the test pieces.
8 Test methods
8.1 Analysis
Analysis shall be carried out on the test pieces, or test portions, prepared from the test samples obtained in accordance with 7.2. Except in cases of dispute, the analytical methods used shall be at the discretion of the supplier. In cases of dispute, the methods of analysis to be used shall be agreed between the disputing parties. For expression of results, the rounding rules given in 8.7 shall be used.
8.2 Tensile test
The tensile properties shall be determined in accordance with EN ISO 6892-1 on the test pieces prepared from the test samples obtained in accordance with 7.3. The test pieces may be a full cross- section of the product or produced by machining, in accordance with EN ISO 6892-1.
8.3 Hardness test
Hardness shall be determined on test pieces prepared from the test samples obtained in accordance with 7.3. The test shall be carried out in accordance with either EN ISO 6506-1 or EN ISO 6507-1 and the impression/indentation made on the outside surface, unless otherwise agreed. The following test conditions apply:
— for the Brinell hardness test in accordance with EN ISO 6506-1, a 0,102 F/D2 ratio of 10:
1) a 2,5 mm diameter ball and a force of 6 12,9 N for thicknesses equal to or greater than 2 mm;
2) a 1,0 mm diameter ball and a force of 98,07 N for thicknesses less than 2 mm;
— for the Vickers hardness test in accordance with EN ISO 6507-1:
1) a test force of 98,07 N for thicknesses equal to or greater than 2 mm;
2) a test force of 49,03 N for thicknesses less than 2 mm.
8.4 Electrical test
The test method used shall be left to the discretion of the supplier, e.g. eddy current method or resistance bridge, if not otherwise specified.
The electrical resistivity or conductivity shall be determined by direct measurement either at
20 °C ± 1 °C or at another temperature, when the result shall be corrected to the equivalent value at 20 °C, on the product in the as delivered condition, sampled in accordance with 7.3.
8.5 Hydrogen embrittlement test
Profiles and profiled wire in copper grades listed in 6.4 shall be subjected to the hydrogen embrittlernent test, which shall be carried out in accordance with EN ISO 2626.
Test pieces shall be of convenient length and either of the full cross-section or of convenient thickness or diameter not greater than 12 mm. Any edges shall be rounded and smoothed. Machined test pieces shall retain some part of the original surface to be on the outside of the bend.
After heating the test pieces in hydrogen, as described in EN ISO 2626, they shall be subjected to the close bend test described in EN ISO 7438.
8.6 Retests
If there is a failure of one, or more than one, of the tests in 8.1 to 8.5, two test samples from the same inspection lot shall be permitted to be selected for retesting the failed property(ies). One of these test samples shall be taken from the same sampling unit as that from which the original failed test piece was taken, unless that sampling unit is no longer available, or has been withdrawn by the supplier.
If the test pieces from both test samples pass the appropriate test(s), then the inspection lot represented shall be deemed to conform to the particular requirement(s) of this document. If a test piece fails a test, the inspection lot represented shall be deemed not to conform to this document.