On Sun, 22 Mar 2009 16:00:12 -0500, Ned Simmons
wrote:

On Sun, 22 Mar 2009 16:52:56 -0400, Errol Groff
wrote:


Two of my students are building model hit and miss engines. The
drawing calls for stainless steel for the connecting rods but does not
specify what grade. The part will be made from .4375 diameter rod
stock.

Suggestions please on what grade to use keeping in mind that they have
no experience with S.S. so machinability is important. Will probably
order the stock from Mc Master Carr and they list a bewildering
variety of grades.

As long as there's no welding involved, type 303.

Indeed

Gunner

"Human nature is bad. Good is a human product*
A warped piece of wood must be steamed and forced
before it is made straight; a metal blade must be put to the whetstone
before it becomes sharp. Since the nature of people is bad, to become corrected
they must be taught by teachers and to be orderly they must acquire ritual
and moral principles."
—Sun Tzu
*