At 10:51 09/13/03 -0400, you wrote: >I got some 4140 1 3/4" square and am going to attempt to make some >hammers.What's the heat treat? Principle Metals at http://www.principalmetals.com/ is a good site to use to look up properties of various steels from 1006 to Vascoware, everything inbetween and then beyond. Dave Brown Heritage Smithing Green Bay, WI ABANA, UMBA, GoM, MODA, ARG