Re: from 40' 6' to 50' 6" box cars
Tony,toggle quoted messageShow quoted text
I agree on the Lt Wt issue. They experimented with 0.075" thk HSLA steels just prior to the war and then re-upped the ga. again. HSLA (then called high tensile) steel was used in side-sheets but at the older std thicknesses.
-------------- Original message --------------
From: Anthony Thompson <thompson@...>
Frank Greene wrote:
Stronger, lighter materials allowed larger cars to be operated. MoreNope to this one. Cars were still being built out of simple,
plain-carbon steel. Certainly design had improved, with far smaller
center sills once the ARA design became standard for all-steel box
cars. Even the slightly higher strength steels used in the 1960s did
not really change dimensions of structural parts. And "lighter?" Nope.
Dept. of Materials Science & Engineering
University of California, Berkeley