Almen Gage Calibration

  1. Prof. Dr.-Ing Lothar Wagner Chairman of ICSP8
  1. Jack M. Champaigne

Published Online: 7 FEB 2006

DOI: 10.1002/3527606580.ch15

Shot Peening

Shot Peening

How to Cite

Champaigne, J. M. (2003) Almen Gage Calibration, in Shot Peening (ed L. Wagner), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606580.ch15

Editor Information

  1. TU Clausthal, Institut für Werkstoffkunde und Werkstofftechnik, Agricolastr. 6, D-38678 Clausthal-Zellerfeld, Germany

Author Information

  1. Electronics Inc, Mishawaka, IN, USA

Publication History

  1. Published Online: 7 FEB 2006
  2. Published Print: 12 MAY 2003

ISBN Information

Print ISBN: 9783527305377

Online ISBN: 9783527606580



  • shot peening;
  • Almen gage calibration;
  • Almen test strip


The Almen gage is used to measure the curvature or arc height of the Almen test strip that has been subjected to particle impacts on one side. The resulting impingement on the test strip causes it to stretch and arch. The resulting measurement is used to determine the blast stream energy or peening intensity.

The Society of Automotive Engineers, SAE, has developed a standard practice for the construction of the gage in document J-442. The present application of the gage includes the use of digit l indicator replacing the original dial indicator and the addition of end-stops to help assure proper positioning of the strip for measurement. The SAE specification gives dimensional data necessary to construct the gage but does not mandate calibration procedure. This article will address calibration procedures and recommended practices. Three areas are explored: (a) Calibration of the indicator, (b) Measurement of ball position(s), (c) Matching gages with special gage block.