Metal Dog

Metal Dog

What sort of metal are Military "Dog Tags" made from?

They would have to be made out of a pretty tough metal in order to last many years, now for maybe Centuries to identify lost Soldiers.
I think they should made from Platnium

If you have faith in the actual military specs, it is made of a low carbon content stainless steel.

Official Nomenclature: Tag, Identification, Personnel
AKA: NSN 84650002424804

Salient Characteristics. The identification tag shall be constructed from corrosion-resisting steel with a natural finish conforming A, HR, or CR, finish No. 1 of ASTM A 766. At any point on the flat more than 1/8 inch from the beaded edge, the finished tag shall have a maximum hardness of 179 on the Diamond Pyramid hardness scale when tested in accordance with ASTM E 92 or 88 on the Rockwell 15 T Scale when tested in accordance with ASTM E 18. The tag shall be 2.000 (+.005, -.020) inches long by 1.125 (+.003, -.025) inches wide with rounded edges (.75
RAD). The tag shall have a .141 +/-.005 inch diameter hole with the center of the whole located .156 +/-.005 inch from one edge. The thickness of the tag shall be .016 +/-.001 inch, and the thickness of the bead around the edge and hole shall be .0315 (+.0225, -.0025) inch.

1.1 Scope. This document covers one type of metal identification tag used by personnel of the Armed Forces.

2.1 Government documents, drawings, and publications.

Drawing

4-1-485 Tag, Identification, Personnel

3.2.1 Steel. Corrosion-resisting. Corrosion-resisting steel shall conform to class 304, condition A, HR or CR or QQ-S-766.

3.3.1 Flatness. Each finished tag shall be flat across the length and width and shall be capable of being passed through the hopper and slide feed gage if applicable. Hopper and slide feed gage will be made available by the Government.

3.3.2 Hardness. When tested as specified in 4.4.4 and at any point on the flat more than 1/8 inch from the beaded edge, the finished tag shall have a maximum hardness of 179 on the Diamond Pyramid hardness scale or 88 on the Rockwell 15 T scale.

3.4 Finish. All identification tags shall have a natural finish.

6.1 Intended use. Tags covered by this document are intended to be used by military personnel for identification purposes.