AWS A5.11／A5.11M pdf free download
AWS A5.11／A5.11M pdf free download.Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding.
6. Rounding Procedure
1kw purposes of determining compliance with the requirements of this standard, the actual test values obtained shall he subjected to the rounding rules of ASTM E29 or Rule A in Clause B.3 of ISO 4JO0O- I (the results are the same). If the measured salues are obtained by equipment calibrated in units other than those of the specified limit, the measured values shall be consened 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 cakulating the average. An observed or calculated value shall be rounded to the nearest 1(fl) psi (I ksi) (or tensile and yield strength for AS II or to the nearest 10 MPa for tensile and yield strength for A5.IIM: and to the nearest unit in the last right-hand place of figures used in espressing the limiting values for other quantities. The rounded results shall fulfill the requirements for the classification under test.
7. Summary of Tests
The tests required for classification are specified in Table 2. The purpose of these tests is to determine the chemical composition. the mechanical properties and soundness of the weld metal, and the 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 Clause 9. weld Test Assemblies, through Clause 13. Bend Test.
8. Retest
N.I lithe results of any lest fail to meet the requirement. that test shall be repeated twice. The results of both rctcsts shall meet the requirement. Specimens for retest ma) he taken from the original lest assembly, or from one iw two new test a.sscrnhhcs. For chemical analysis. retest need be only for tho’.c specific elements that failed to meet the test requirement.
112 lithe 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.
1L3 In the event that, during preparation or after completion of any test, it is clearly determined that prescribed or proper procedures were not followed in preparing the weld test assembly or test specimens) or in conducting the test. (he test shall be considered invalid, without regard to whether the test was aetuall> completed, or whether test results net, or failed to meet, the requirement. That test shall he repeated. following proper prescribed procedures. In this case, the requirement for doubling of the number of lest specimens does not apply.
9. Weld Test Assemblies
9.1 To perform all required tests as specified in Table 2. a minimum of one weld test assembly is required. Two, or even three. may be necessary (according to the classification, size, and manner in which the testing is conducted, i.e.. with respect to ahernans’e oprions.
The weld test assemblies arc identified as follows:
(I) The weld pad in Figure I for chemical analysis of the undiluted weld metal
(2) The groove weld in Figure 2 for mechanical properties and soundness
(3) The groove weld in Figure 3 for radiographic soundness
The sample for chemical analysis may be taken from a low dilution area in the groove weld in Figure 2. or from the reduced section of the fractured tension test specimen. thereby avoiding the need to male the weld pad. In case of dispate, the weld pad shall be the referee method.
9.2 Preparation of each weld test asemhls shall be as prescribed in 93.9.4.1. and 9.4.2. The base metal for each assembly shall meet the requirements of the appropriate ASTM specification shown in Table 3 or an equivalent specification. Testing of assemblies shall he as prescribed in Clauses 10 through 13.AWS A5.11／A5.11M pdf download.
