In 25 words or less ................
Best choice of steel and rods for exposure to temperatures from 0 F to 40 F.
Medium stress and modular distortion. Steve |
In 25 words or less ................
"Steve B" wrote in message
... Best choice of steel and rods for exposure to temperatures from 0 F to 40 F. Medium stress and modular distortion. Steve For? Cooler shelves? |
In 25 words or less ................
On Apr 11, 7:31*pm, "Steve B" wrote:
Best choice of steel and rods for exposure to temperatures from 0 F to 40 F. Medium stress and modular distortion. Steve Most any steel made now will have a ductile brittle transition temperature well below 0 degrees F. If going for stainless any 300 series stainless will be good. It used to be that 0 degrees F could be a problem for impact strength. Ax heads needed to be warmed above freezing to avoid shattering. Dan |
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In 25 words or less ................
"Ignoramus32726" wrote in message It used to be that 0 degrees F could be a problem for impact strength. Ax heads needed to be warmed above freezing to avoid shattering. This was due to sulphur content, right? And then people figured out that sulphur needed to be removed, right? i AFAIK until at least the 1920's it was assumed that sulphur caused more problems with hot steel than cold, so if it didn't suffer from "hot shortness" at the mill it would be good enough in service. Fred Colvin, 1922: "Sulphur is of most trouble to rolling and forging operations when conducted at a red heat. It makes steel tender and brittle at that temperature - a condition known to the workmen as " red-short.'' It seems to have little or no effect upon the physical properties of cold steel - at least as revealed by the ordinary testing machines - consequently many specifications do not set any limit on sulphur, resting on the idea that if sulphm- [sic] is low enough not to cause trouble to the manufacturer during rolling, it will not cause the user any trouble. " http://www.archive.org/stream/cu3192...49615_djvu.txt US engineers didn't seriously encounter and have to solve problems with tool steel in Arctic cold until WW2. Maybe the Soviets kept their Siberian experience a military secret?? jsw |
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"Bob La Londe" wrote in message ... "Steve B" wrote in message ... Best choice of steel and rods for exposure to temperatures from 0 F to 40 F. Medium stress and modular distortion. Steve For? Cooler shelves? For use underwater at 35-40 F. Steve |
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