Home Forums General Discussion Media, Shot, Beads, etc. Saturation time--cut wire compared to cast steel shot. Need info.

04/13/99
Dear Jack,
There is a new Northrop Grumman internal document which will resolve your concerns in using Cut Wire Shot. If presently using 280 cast steel shot, the recommended Cres or Steel cut wire is SCW/CW - 28. The use of conditioned cut wire shot is recommended to reduce or eliminate metallic contamination and embedment, which in return reduces chemical cleaning of shot peened parts and dispersal of waste materials. In respect to revised peening times, The Boeing spec specifies that whenever 100 percent coverage is called out on an engineering drawing, the peening time shall be the longer of the time required for 100 percent part coverage or the time reqired for Almen strip saturation. Silvia, look at MEPS-15000-317 for more information.

Richard E. Buckholz
Materials Engineer - Lead
Northrop Grumman
BUCKHRI@mail.northgrum.com