[John Sabato]

I am not aware of any technical information that specifies the steel type, but I think that some members may have part of the information from historical documents, but perhaps not the whole picture.

I would recommend the use of 4140 steel as that is the current type used by the industry for most firearms that end up getting blued, but as to hardness and temper of various parts? The only way to be certain would be to get a shooter Luger for testing and have the various parts hardness tested using Rockwell or Brinell tests... and then torture test those parts for durability.

If you don't own my Blueprint CD's... I suggest you order one (see the for sale forum sticky) and get your self a German - English technical dictionary. The blueprints are the largest source of technical information on the Luger.