Pilger Die (IMAGE) DOE/Pacific Northwest National Laboratory Caption These two views of a 142 mm pilger die show the groove where metal tubing is passed through to reduce tube diameter and wall thickness. PNNL worked with LSP Technologies and Sandvik Special Metals to treat such dies with laser shock peening to prevent die failure. Credit PNNL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.