An image showing 'N26166; A test sheet of steel during peening trials held in No. 1 Ship Shop in Portsmouth Dockyard. The test piece is edge welded to a 40 lbs base plate which is welded to T bar stiffeners. The test piece is marked No. 9 root run ready for peening. Peening is the process of working a metal's surface to improve its material properties, especially after welding to help relieve the tensile stresses that develop on cooling in the welded metal (as well as the surrounding base metal).'

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Peening trials in No. 1 Ship Shop, Portsmouth Dockyard, Hampshire.

A test sheet of steel during peening trials held in No. 1 Ship Shop in Portsmouth Dockyard. The test piece is edge welded to a 40 lbs base plate which is welded to T bar stiffeners. The test piece is marked No. 9 root run ready for peening. Peening is the process of working a metal's surface to improve its material properties, especially after welding to help relieve the tensile stresses that develop on cooling in the welded metal (as well as the surrounding base metal).

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Object details

ID:	N26166
Type:	Negative
Materials:	Glass plate negative
Display location:	Not on display
Date made:	11 April 1946
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 100 mm x 127 mm