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topic 25952

What is CRCA steel?



A discussion started in 2003 but continuing through 2017.

(2003)

Q. What are the main differences (if any) between CRCA steel strips and Mild Steel strips? Is there any cost difference between the two.

VINAYAK BHAMARE
Purchase Officer - CHANDIGARH, CHANDIGARH, INDIA


(2004)

A. No difference.

Mehul Doshi
steel company - Mumbai


Cold Rolling of Steel


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,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


July 12, 2008

Q. CAN CRCA GET RUSTED? IF YES, CAN RUSTING BE AVOIDED?

PRAVEEN KUMAR
EMPLOYEE - BANGALORE, India


July , 2008

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


September 20, 2008

Q. What is the care one should take in transportation of CRCA sheets in rainy seasons?

Rajan Nagane
- Pune, Maharshtra, India


May 30, 2009

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

Sushil Kumar
- New Delhi, India


March 2, 2010

Q. What is the difference between CR and CRCA sheet steel?

anand bhavangar
- simla himachal India


March 2, 2010

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


October 21, 2010

Q. What is the difference between CRCA, Sheet steel and SS (say SS316). Which one will be the best suitable for a cabinet to be installed in a refinery?

Subin Thomas
Engineer - Mumbai, India

October 21, 2010

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



January 25, 2011

Q. Hi,

I wanted to know, given that the HR is stress relieved and more easily mouldable, why is it that for the more intricate shapes the CR (or CRCA) is preferred and while it would be hard to draw or mould in the cold state.

Suryanarayana

Suryanarayana Sastry
Product designer/Development Engineer - Pune, India

November 9, 2011

Q. Why is CRCA more compatible for deep draw process or critical forming process than HR if HR is softer than CRCA?

Avadhoot Pol
- Pune, India


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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



March 25, 2011

Q. Sir,
In case of CRCA (cold rolled close annealed) steel sheets, is annealing a low-temperature process (such as stress relief annealing) or does it involve recrystalization?

Brajesh Sinha
- Bangalore, Karnataka, and India

April 24, 2011

Q. HOW THE WEIGHT IS CALCULATED OF HRCA/CRCA SHEET IS THERE ANY FORMULA?

MUKESH

MUKESH KULKARNI
LOGISTICS - PUNE, INDIA

April 25, 2011

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


August 23, 2011

Q. Can anyone let me know the mechanical and chemical properties of CRCA and HRCA steel? or where do I find it? Is HRCA superior to CRCA in terms of strength or vice versa?

Vikram Dave
Healthcare - Bangalore, India

August 31, 2011

Q. What is the coating on CRCA sheets is it organic or inorganic? Frame the difference.

sudhakar putta
in quality control - Hyderabad, Andhra pradesh, India


August 31, 2011

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


November 21, 2011

Q. What is difference between CRNO steel and CRCA?

Vivek Anand
- Delhi, India


November 21, 2011

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,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


December 23, 2011

Q. Why pinchpass/skinpass is important for CRCA process?

Abhishek Roy
Marketing - Faridabad, India

February 2, 2012

Q. How to check annealing (Degree of annealing) in CRCA coil?

S. LAKSHMAN
oil - Chennai, India


March 5, 2012

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

C.Muthuswamy
- Rourkela, Odisha, India


March 2, 2012

Q. What is the meaning of Hi in 6 hi mill?

Saurabh Basarkar
- India


March 12, 2012

Q. WHAT IS THE ULTIMATE STRENGTH OF THE CRCA PIPES? PLEASE REPLY SOON I NEED IT URGENTLY FOR MY PROJECT WORK

HARISH PAI
STUDENT - HUBLI, KARNATAKA, INDIA


March 12, 2012

A. Hi, Harish.

This is information you must get from a steel handbook; you must never ever rely on the internet rumor mill for engineering work!

But it is unusual to be highly concerned about the "ultimate strength" of steel; the "yield strength" is the significant number for, say, 99.9% of all applications because once you reach the yield point, the structure acquires a permanent distortion that greatly limits its usefulness. You might want to know the ultimate strength if you were designing a rupture disk, I suppose. Good luck.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


March 14, 2012

Q. What is the difference between CRCA and Skinpass sheet?
How can we identify whether the sheet is CRCA or Skinpass?

Ramakrishna Kudva
switchgear - Mumbai, Maharashtra, India


March 24, 2012

Q. What is the "couping value" in terms of CRCA sheet and how can we perform it?

Chetan Gupta
- Jaipur, India


April 23, 2012

Q. WHY CRCA STEEL IS BETTER THAN MILD STEEL OR WHAT IS DIFFERENCE BETWEEN CRCA STEEL AND MILD STEEL

JANGAM KIRTIKUMAR
- Pune, Maharashtra, India


May 14, 2012

Q. What is HRPO; is it readily available in market?

GK Nagaraj
- Bangalore,Karanataka,India


May 14, 2012

A. Hi, GK. That is an acronym that I hadn't seen used before on this page, but it means "Hot rolled, pickled & oiled". Yes, it should be readily available.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


June 7, 2012

Q. Dear Sir,

What is the post effect on Hot rolled ms Sheet and CRCA Sheet after powder coating.

Regards,

BISWANATH DAS
- Ahmedabad, Gujarat, India


June 7, 2012

A. Hi Biswanath.

Sorry, I don't know what you mean by "post effect" in this context; please re-phrase. But readers want to hear YOUR situation, not an endless stultifying string of abstract flash-card questions :-)

So please: Who are you? What are you trying to make? What has motivated you to ask this question? Thanks.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


July 12, 2012

Q. I am just wondering whether CRCA can be replaced by the most readily available Cast Iron for industrial applications?

If no, then why so ?

Shyam Vora
- Mumbai, Maharashtra, India


July 13, 2012

A. Hi Shyam. Certainly not. Steel has far superior properties to cast iron for many engineering purposes, including ductility rather than brittleness.

Why would you just happen to wonder about this?  :-)

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


August 20, 2012

Q. Respected Sir

I am new to the job. I need to collect data on the various kind of raw material used in our plant. I came across many different material to name like CR, CRCA, GA, HR, ERW, SS-400 and many more. On searching internet I came across your website. My question is what are the unique features of each and every material. If possible please suggest some handbook available at internet. I know the question is abstract but I require some base to get accustomed to different material and then be specific.

Ankit

Ankit Rai
Automobile - Gurgaon,Haryana,India


ASM Specialty Handbook
Carbon & Alloy Steels

September 24, 2012

Hi Ankit. The ASM Metals Handbook is a great source for every question about the properties of metals, but it's a 20+ volume set costing several thousand dollars. Since your interest seems restricted to alloy and carbon steels, their specialty handbook would probably be ideal =>

Your boss may appreciate your sound advice that the company is crazy to try to get by without a steel handbook ... or not :-)
Good luck.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


September 25, 2012

Q. Relative permeability of CRCA steel

Dear specialists

I have a rather specific question in connection with properties of CRCA mild steel. For penetrability calculation of this steel for magnetic field I'm searching for relative permeability numbers. I'm far away from mechanical engineering and will be thankful for the information and/or sources.

Thanks in advance

Vlad Ost
railway transportation - Berlin Germany


January 19, 2013

Q. What is the difference between CRCA and CACA sheet metal? Which one is preferred for elevator cabin, control panel?

Deepak Kumar
- Shaktinagar, Dist Sonebhadra, Uttar Pradesh, India


January 22, 2013

A. Hi cousin Deepak. Where did you find this term "CACA", and why might want to build elevator cabins and control panels out of it?

I've never heard the term before and feel that we're probably wasting time based on nothing but an accidentally introduced typographical error. Stop the madness! Please tell us where you saw this term and why it interests you :-)

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


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