On 3/13/2010 12:52, Ned Simmons wrote:
On Sat, 13 Mar 2010 12:05:24 -0600, Louis
wrote:

Looking for 4340, annealed, in 1" x 2" size. Length is 4" minimum.

Speedy, Metal Express, and others do rounds, and I'm not ready to carve
a rectangle from a round.

Do you really need 4340? I think the major difference between 4340 and
4140 is hardenability. If you need maximum strength all the way thru a
large section 4340 is indicated, if not, short pieces of 4140 flat
will be easier find.


Looking to heat treat to Rockwell C 35, Tensile strength 160,000psi,
yield 138,000psi, or there abouts.

You are exactly right on 4140 being easier to find...