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descaling stainless hot rolled bar

descaling stainless hot rolled bar

descaling stainless hot rolled bar

(OP)
Flat-rolled stainless producers shot blast hot-rolled stainless plate and sheet coils before pickling to loosen the embedded-type scale which is hard to pickle off. What do bar producers do to break up the hot mill scale before anneal and pickle?

Michael McGuire
http://stainlesssteelforengineers.blogspot.com/

RE: descaling stainless hot rolled bar

ASM HANDBOOK Volume 1 describes several conditions for stainless steel bar finishing:

Hot worked only: [1] scale not removed (except for spot conditioning), [2] rough turned, [3] blast cleaned

Annealed or otherwise heat treated: [1] scale not removed, [2] rough turned, [3] pickled or blast cleaned & pickled, [4] cold drawn or cold rolled, [5] centerless ground, [6] polished

Carpenter mills the surface of larger section square bars in order to remove the scale from hot-rolling.

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