What is CRCA steel?

A. No difference.

A. Hi, Vinayak. CRCA means "cold rolled close annealed". This means that after hot rolling and pickling, the steel is cold rolled to a reduced thickness (which makes it brittle and not too useful), which is then followed by annealing in a closed atmosphere of nitrogen or other non-oxidizing gases (which softens it back up while protecting it from oxidation).

Unfortunately the term "mild steel" doesn't mean much except "low carbon"; it could be hot rolled or cold rolled. Please flesh out the question with your own situation. Thanks.

Regards,

A. Hi, Praveen. CRCA is steel and therefore highly prone to rusting. Often the rolling mill will apply oil after the annealing, and this will add at least a little short term rust resistance.

But the CRCA must be fabricated into something useful and then pretreated and a surface finish applied in reasonably short order.

Please provide context.

Regards,

A. Dear sir, In rainy season it should be properly packed with polythene & hessian cloth, to avoid contact from moisture.
Thanks,

Hi, Anand. Could you please put your question into context for us because I am not understanding how your question is any different than Vinayak's question which was already answered. I'm not sure that anyone would actually offer cold rolled steel that has not been annealed. Thanks!

Regards,

A. Hi, Subin.

"CRCA" was explained on this page.

"Sheet steel" says that it's in the form of a sheet and that it's made of some kind of steel, but says nothing at all about the steel.

"316SS" is one particular composition of stainless steel. By stainless, we mean that it has other elements besides iron that improve its rust resistance and corrosion resistance. 316SS has about 18% chrome and 8% nickel and a bit of molybdenum, and perhaps some trace ingredients. It is rust resistant whereas CRCA is not, and it is probably a good choice but an expensive one.

Regards,

Hi Sury; hi Avadhoot. Some people call cold rolled steel "cold finished steel", and I think that sort of implies the answer to your questions, i.e., that the steel has a finish (a given smoothness and accuracy) whereas hot rolled steel is "raw" and insufficiently finished for small and intricate shapes. That is my assumption only, for what it's worth :-)

Regards,

A. Hi, Mukesh.

Simply multiply the length of the sheet by the width of the sheet by the thickness of the sheet to obtain its volume. Steel weighs about 0.284 pounds per cubic inch or 7.85 grams per cubic centimeter.

Regards,

A. Hi, Sudhakar

"Cold rolled close annealed" does not imply anything about what coatings may later be added. Please try to provide your situation and the context so we can try to help. Posting questions in the abstract opens so many ifs, ands, and buts, that it rarely leads to satisfactory responses; so, as you see, most readers simply ignore such overly broad questions. Thanks.

Regards,

A. Hi, Vivek.

CRNO = cold rolled non-oriented.

Readers! Keeping a question abstract like this makes it dull, uninformative, and uninteresting. And the result, as you can see from the lack of responses to similar questions, is that nobody expands the discussion. Please describe your own situation that motivates the question, then readers may flesh out the answer in a way that is useful to you instead of just muttering to themselves: "look it up", and moving on :-)

When they do, the page will become fun and interesting. Right now we're all choking on dry dust. Thanks!

Regards,

A. Degree of Annealing can be known by measuring Hardness and also by microstructure.