Wrought magnesium and magnesium alloys

BS ISO 23694:2021 pdf free.Wrought magnesium and magnesium alloys一Extruded rods/bars and tubes.
6.1.2.3 IdentificatIon of specimens
Each specimen shall be marked in such a manner that, after removal, it is still possible to identify the product from which it was taken, and its location and orientation. If, during the course of subsequent operations, removal of the markings cannot be avoided, new markings shall be made before the originals are removed.
6.1.2.4 Preparation of specimens
Specimens shall be taken from the sample after completion of all the mechanical and heat treatments that the product has to undergo before delivery, and which can influence the mechanical properties of the metal. In cases where this is not possible, the sample or specimens may be taken at an earlier stage, but they shall be subjected to the same treatment as that to which it is intended to submit the product concerned.
NOTE If the purchaser intends to convert the material to a final temper which is different from the as supplied temper, then additional testing can be requested by the purchaser in order to satisfy him or herself that the material is capable of meeting the specified properties of the final temper. Itis only necessary for the supplier to confirm that selected samples, heat-treated using supplier laboratory conditions, meet the properties specified for the final temper required by the purchaser.
Cutting shall he carried out in such a manner that it does not change the characteristics of the part prepared. Thus, the dimensions of the specimens shall provide an adequate machining allowance to permit removal of the zone affected by cutting.
Specimens shall not be machined or treated in any way by which their mechanical properties can be altered. Any straightening required shall be carried out with great care, preferably by hand.
6.1.2.5 Number of specimens
Unless otherwise specified, the minimum number of specimens shall be agreed between the supplier
and the purchaser.
6.1.3 Test pieces for tensile test
6.1.3.1 Identification of test pieces
Each test piece shall be marked in such a manner that it is possible to identify the inspection lot from which it was taken and, if required, its location and orientation in the product.
If a test piece is marked by stamping, this shall not be in a place or manner which can interfere with subsequent testing.
Where it is not convenient to mark a test piece, an identification tag may be attached. Alternative methods, such as specially designed boxes, may be used for the purpose of test piece identification.
6.1.3.2
Machining
Any machining necessary shall be carried out in such a manner that it does not change the characteristics of the metal in the test piece.
6.1.3.3 Number of test pieces
One test piece shall be taken from each specimen. The recommended shapes and dimensions for test pieces are specified in ISO 6892-1.
6.1.3.4 Type and location of test pieces
Type and location of test pieces shall be agreed between the supplier and the purchaser.
6.2.1 Chemical composition
Methods of analysis shall be agreed between the supplier and the purchaser.
In case of dispute concerning the chemical composition, referee analysis shall be carried out by the methods and the results obtained by these methods shall be accepted.
6.2.2 Tensile test
The tensile test shall be carried out in accordance with ISO 6892-1.
6.2.3 Surface finish
Unless otherwise specified, examination of surface appearance shall be carried out, without the assistance of magnifying apparatus, on products before delivery.
6.2.4 Measurement of dimensions
All dimensions shall be measured with suitably calibrated instruments which are appropriate to the range of dimensions under consideration. The measurements shall be made at ambient temperature or, in the case of dispute, at a temperature of between 15°C and 35 °C.
6.2.5 Additional tests
If any other tests are required, they shall be agreed between the supplier and the purchaser. These tests shall be carried out in accordance with the relevant International Standards or a method agreed between the supplier and the purchaser.
6.3 Retests
6.3.1 Mechanical properties
If any one of the test pieces first selected fails to meet the requirements for the mechanical tests, the following procedure shall be applied:
— if an error is clearly identified, either in the test piece preparation or the test procedure, then the corresponding result shall be disregarded and the testing recommended as initially required;
— if this is not the case, then two further specimens shall be taken from the same inspection lot, one being from the same unit of product (rod/bar, tube, profile) from which the original specimen was taken, unless that unit of product has been withdrawn by the supplier:
— if both test pieces from these additional specimens meet the requirements, the inspection lot which they represent shall be deemed to conform to the requirements of this document;
— should one test piece fail to meet the required limits:
— the inspection lot shall be deemed not to conform to the requirements of this document;
— or, where applicable, the lot may be submitted to additional mechanical or thermal
treatment(s) and then retested as a new lot.
6.3.2 Other properties
The retest procedure of other properties shall be agreed upon between the supplier and the purchaser.
6.4 Test report
The test report shall include:
a) the sample;
b) the International Standard used (including its year of publication);
c) the method used;
d) the result(s), including a relerence to the clause which explains how the results were calculated;
e) any unusual features observed;
1) the date of the test.
7 Marking
Marking of products is only undertaken when agreed upon between the supplier and the purchaser and is stated on the order. This marking shall not adversely affect the final use of the product.
8 Packing
Unless otherwise specified in International Standards relating to special products or specified in the order, the method of packing shall be determined by the supplier, who shall take all suitable precautions to ensure that, under the usual conditions of transportation, the products are delivered in a condition suitable for use.
9 Transportation and storage
During transportation, all the products shall be kept clean, dry and away from contamination. Rain and snow shall be kept off to prevent erosion of the packing case. Chemically active substances, dampened materials or inflammable substances shall not be used. Loading and unloading should be done with caution to avoid damage of the packing.
Immediately after receiving, the products should be preserved in a dry and clean environment, which is free of corrosive gas. chemical active substances, dampened materials and inflammable substances, and sheltered from rain and snow. Inspection for the erosion should be done within 10 days. Anticorrosion treatment should be regularly carried out for the sheet materials.BS ISO 23694 pdf free download.Wrought magnesium and magnesium alloys