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Cold Weather Steel?

Cold Weather Steel?

Cold Weather Steel?

(OP)
Hello,

Where can I find information on "cold Weather Steel," I am not referring to "cold formed steel."

While conversing with a structural engineer from another firm the other day, he mentioned that I should consider specifying "cold weather steel" for stiffeners greater than 13 mm for a project of mine. I have not heard of this before, and was not able to find any information on the steel design manual. A google search yielded little results. Could he have possibly meant "cold formed steel"?

RE: Cold Weather Steel?

Some steels function better than others at low temperatures.  What is your application and what is the temperature?

Hg

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RE: Cold Weather Steel?

(OP)
Looking deeper, I was able to find information about it in the steel design manual.

I specified WT (instead of W) Category 4 for temperatures as low as -40

What I do not understand though, is why are steel plates with thickness greater than 13 mm more susceptible to brittle failure as opposed to steel plates less than 13 mm?

Thank you.

RE: Cold Weather Steel?

To ask a similar question, can A516 Gr 70 or A537 class 1 plate be considered a cold-weather steel? Will these materials have a charpy value at -50F?  Thanks, Awol

RE: Cold Weather Steel?

Depending on the exact steel composition and production process, a significant proportion of a hot-rolled steel section's strength can come from the surface and near-surface layer.  A thinner section has a greater proportion of near-surface vs interior section.  This may not be relevant for your particular manufacturer's steel section though.

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