AWS A5.29:1998 pdf download.Specification for Low-Alloy Steel Electrodes for Flux Cored Arc Welding
5. Certification
By affixing the AWS Specification and Classification designations to the packaging, or the classification desig-nations to the product, the manufacturer certifies that the product meets the requirements of this specification.4 6. Units of Measure and Rounding-Off Procedure
6.1 U.S. Customary Units are the standard units of mea-sure in this specification. The SI Units are given as equivalent values to the U.S. Customary Units. The stan-dard sizes and dimensions in the two systems are not identical and, for this reason, conversion from a standard size or dimension in one system will not always coincide with a standard size or dimension in the other. Suitable conversions, encompassing standard sizes of both, can be made, however, if appropriate tolerances are applied in each case.
7. Summary of Tests
The tests required for each classification are specified in Table 5. The purpose of these tests is to determine the mechanical properties, soundness, the chemical compo-sition of the weld metal, and usability of the electrode.The base metal for the weld test assemblies, the welding and testing procedures to be employed, and the results required are given in Sections 9 through 14.The optional supplemental test for diffusible hydrogen in Section 15 is not required for classification, but is in-cluded for an optional electrode designation as agreed to between the purchaser and supplier. Another optional supplemental designator (J) may be used to indicate Charpy impact testing at lower than standard temperature.
8. Retest
If any test fails to meet the requirement, that test shall be repeated twice. The results of both retests shall meet the requirement. Specimens for the retest may be taken from the original test assembly or from a new test assem-bly. For chemical analysis, retest need be only for those specific elements that failed to meet their test require-ment. If the results of one or both retests fail to meet the requirement, the material under test shall be considered as not meeting the requirements of this specification for that classification.
In the event that, during preparation or after comple-tion of any test, it is clearly determined that prescribed or proper procedures were not followed in preparing the weld test assembly or test specimen(s), or in conducting the tests, the test shall be considered invalid, without regard to whether the test was actually completed, or whether test results met, or failed to meet, the require-ment. That test shall be repeated, following proper prescribed procedures. In this case, the requirement for doubling the number of test specimens does not apply.AWS A5.29 pdf download.