AWS A5.8M-A5.8:2011 pdf download.Specification for Filler Metals for Brazing and Braze Welding
1.1 Scope. This specification prescribes requirements for the classification of brazing filler metals for brazing and braze welding. It includes brazing filler metals for brazing with or without a fux and in all protective atmospheres for various applications, including those for vacuum service.' The prefix“RB”indicates that the brazing filler metal is suitable for use both as brazing rod for braze welding and as a brazing filler metal.
For purposes of determining compliance with the requirements of this standard, the actual test values shall be subjected to the rounding-off rules of ASTM E29 or Rule A in Clause B.3 of ISO 80000 -1 (the results are the same). If the mea-sured 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 off. If an average value is to be compared to the spec-ified limit, rounding off shall be done only after calculating the average. An observed or calculated value shall be rounded to the nearest 10 MPa [1000 psi] for tensile and yield strength 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 requirements for the classification under test.
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. Samples for retest may be taken from the original sample or from one or two new samples. For chemi-cal analysis, retest need be only for the specific elements that failed to meet the requirement.
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 the preparation or after the completion of any test it is clearly determined that prescribed or proper procedures were not followed in preparing the test sample(s) 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 number of test specimens does not apply.AWS A5.8M-A5.8 pdf download.