For users converting from 13165 to 2430 the issue of Coverage must be considered since 13165 is self-contradictory regarding coverage.
=================== technique in agreement with ams 2430 ====================================
3.3.7 Coverage: Areas of parts shot peened in compliance with design requirements shall be peened to complete visual coverage (see 4.4.1 and 6.11). When a surface on which peening is required is obstructed and it is impossible to obtain complete visual coverage by direct impact, coverage by reflected shot is allowed.
Full coverage will not be required if the part is peened only for forming or straightening. Critical applications shall be as specified by the procuring activity (see 4.2 and 6.11).
4.4.1 Coverage: Unless otherwise specified articles shall be 100% visually inspected for compliance with the coverage requirements of 3.3.7 using either method described in 6.11a or 6.11b.
6.11 Coverage: Complete visual coverage is defined as a uniform and complete denting or obliterating of the original surface of the part or work piece as determined by either of the following methods:
(a) Visual examination using a ten power magnifying glass.
(b) Visual examination using a ten power magnifying glass in conjunction with an additional visual examination using an approved liquid tracer system (see 6.17.4) may be used for process control by the contractor. Unless otherwise specified, the procedure for using an approved liquid tracer system is described as follows:
Prepare a control specimen of the actual work piece. Coat this control specimen with tracer liquid by dipping, spraying, or painting and allow the liquid to dry. Check the specimen under a light (an ultraviolet light is used for a fluorescent tracer system) to insure that complete coating of the area to be shot peened has been accomplished. This control specimen is shot peened using the correct intensity and parameters specified for complete coverage and is then re-examined under the light (or ultraviolet light) in order to determine if the tracer residue has been completely removed. Full coverage is indicated by complete removal of the tracer residue. Coverage of actual production pieces can
be established by using the same procedure used for control specimens. This can be done by utilizing the liquid tracer for each part or on a statistical sampling basis.
NOTE: The liquid tracer system must be approved by the procuring activity. Data, showing that 100% coverage of the part is obtainable by using this tracer system, is required.
6.12 Intensity: Intensity can only be established by plotting a saturation curve, as shown in figure 8, and assuring that the required intensity (determined by the arc height of the test strip) falls on the right side of the knee of the curve. By doubling the time of exposure, the arc height of a test strip should not increase by more than 10%.
===================== technique not in agreement with ams 2430 ==================================
3.3.6 Peening iIntensity: Unless otherwise specified on the drawing or in the contract, the intensity value of the shot stream used on the part shall be as specified in Table 6 for the thickness of the material being peened. If only a minimum intensity is specified, the variation from the specified minimum intensity shall be -0, +30% rounded to the nearest unit, but in no case less than 3 intensity units (A, C, or N) unless otherwise specified. For example, a specified peening intensity of 6A would denote an arc height of 0.006-0.009 inches on the “A” specimen. Shot peening of parts shall be accomplished using the same parameters (time, distance, blast pressure, angle of incidence, etc.) as used on the test strip.
[note: inclusion of "time" in the parameters list is in conflict with paragraph 3.3.7.]
========== Conclusion ====================
Your transition to AMS 2430 may or may not be in conflict with 13165 depending upon which version of coverage in 13165 you used (and coversely, which version you ignored).
