An Profile Projector (often simply called a optical comparator in context) is a device that applies the principles of optics to the inspection of Charpy impact specimen. In a comparator, the magnified silhouette of a part is projected upon the screen, and the dimensions and geometry of the part are measured against prescribed limits.

Emission spectrometry is a comparative analytical method in which a small amount of surface material is removed from the specimen. Recent developments in sensors and microelectronics have produced transportable systems that can be used on or adjacent to production lines. In some systems, light from the spark discharge is carried by fiber optics to the

The welded test specimens shall be prepared with a finish suitable for macroetch examination. A suitable solution shall be used for etching to give a clear definition of weld.

The tension test related to the mechanical testing of steel products subjects a machined or full-section specimen of the material under examination to a measured load sufficient to cause rupture.

The bend test is to verify the ductility of the material. If the material does not fracture after bending, the piece is visually checked for cracking or other surface irregularities. The specimen shall be placed on the die member of the jig with the weld atmidspan. Face bend specimens shall be placed with the face

A Charpy V-notch impact test is a dynamic test in which a notched specimen is struck and broken by a single blow in a specially designed testing machine. The measured test values may be the energy absorbed, the percentage shear fracture, the lateral expansion opposite the notch, or a combination thereof.