AWS A5.24-A5.24M:2014 pdf download.Specification for Zirconium and Zirconium-Alloy Welding Electrodes and Rods
6. Rounding Procedure
For the purpose of determining compliance with the requirements of this standard, the actual test values obtained shall be subjected to the rounding rules of ASTM E29 or ISO 80000-1, Part 1, General. If the measured values are obtained by equipment calibrated in units other than those of the specified limit, the measured values shall be converted to the units of the specified limit before rounding. If an average value is to be compared to the specified limit, rounding shall be done only after calculating the average. An observed or calculated value shall be rounded to the nearest 1000 psi for tensile strength for A5.24 [to the nearest 10 MPa for tensile strength for A5.24M] and to the nearest unit in the last right-hand place of figures used in expressing the limiting values for other quantities. The rounded off results shall fulfill the require-ments for the classification under test.
7. Summary of Tests
7.1 The only test required for classification of a product under this specification is full chemical analysis of the fller metal after all thermal and chemical processing or, as permitted in footnote c to Table 1, partial chemical analysis of the rod stock or original producer s melt being used to produce such filler metal together with partial chemical analysis of the finished filler metal when analyzing for interstitial elements, C, O, H, and N.
8. Retest
If the results of any test fail to meet the requirement, that test shall be repeated twice. The results of both retests shall meet the requirement. Material for retest may be taken from the original sample or from a new sample. Retest need be only for those specific elements that failed to meet the test requirement. If the results of one or both retests fail to meet the require-ment, the materials under test shall be considered as not meeting the requirements of this specification.
In the event that, during preparation or after completion of any test, it is clearly determined that prescribed or proper pro-cedures were not followed in preparing the test specimens or in conducting the test, 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 requirement.That test shall be repeated, following proper prescribed procedures. In this case, the requirement for doubling the num-ber of test specimens does not apply.AWS A5.24-A5.24M pdf download.