Metal Forming (Part 2: Hot Rolled Versus Cold Rolled Processes)

This video is part of a series on metal #forming. Its a discussion of the differences between hot #rolling and cold rolling processes. The differences between hot and cold rolling can be difference in part quality, part cost, and processing time. Its important as and #engineer or #manufacturing professional to know the difference between the two.
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[@HighlanderNorth1]

Infinity MFG
When I looked at 0:15, I saw that even Jackie Chan was curious about the difference between cold and hot rolled steel..... Lol. Great video. I took metal shop in like 10th or 11th grade high school in '84 or '85, then worked in a machine shop from 10th grade, til after graduation. Although I never had to do any welding, and we didn't use much cold rolled steel plate, bar stock or tubing at my workplace, I do remember asking my metal shop teacher what the difference was between the 'dark gray' colored steel vs the identical sized steel bars, tubes and sheets that had a relatively clean, metallic surface finish. Mr. Massey summed it up by simply saying that "the lighter colored, cold rolled steel is stronger". But I never fully understood why, although I figured it must have something to do with the extra force it would require to run cold steel through rollers as opposed to heated steel, which would obviously be softened by the heating process prior to rolling it.
This video reinforced that EXTREMELY rudimentary assumption, but also added the technical and scientific reasoning to the how and why cold is stronger than hot. Well, now that we've learned something useful, maybe one day I'll work with Jackie Chan on some metal projects!

[@infinitymfg5397]

LOL! I can't believe that I missed this comment! This is great!
Thanks for watching!

[@JMAJOR-ki7ur]

Thanks for the video. Great revision on metallurgy. I did this as a qualification ten years ago. I still have all my books.

[@infinitymfg5397]

Thanks for watching. I appreciate your support.

[@MCPEMadEnder916]

so far this actually the most inclusive about all the properties between the two types of steel that I've found so far. I have an interest since I'm a welder for a company producing flammable liquids containment solutions and deal strictly with coled rolled steel for its finish and strength over hot rolled

[@ChrisWill]

I'm learning mechanical engineering on my own on youtube thank you for making this video.

[@rdyjur]

thanks for the vids, very helpful and much better than other videos of this subject that just feature a guy talking. The visuals are key here ! THX

[@benli7049]

This is a neat explanation of hot/cold rolling. Thank you.

[@infinitymfg5397]

Thanks a lot Ben! I appreciate you watching.

[@IXIXIXIXIXIXIXI]

subscribed! thanks for the information. keep making quality content like this.

[@Woolmorejared]

very nice. i like

[@RickRabjohn]

Great explanation - best I have heard...tks for sharing

[@mikeolson7656]

This was awesome as well as the first. Thank you for the great video.

[@infinitymfg5397]

Thanks for your feedback! I really enjoy knowing that people find these videos helpful.

[@elizabethbrazzil3083]

Very informative. Thank you.

[@wolverdaprinal7433]

Really good video. Thankyou so much good Sir!

[@humaid321]

thank u so much .. for ur explanation❤❤

[@JayTheMachine]

Great.. 😊😊

[@colonialroofingofnorthcaro441]

Do you happen to know what water tanks is it made out of hot rolled or cold rolled and which one is it better to make it out of you know just for a simple water truck tank

[@vincentmusonda5352]

A good video indeed

[@igcr1234567890]

excellent video my friend, can you do one on hot stamping ?

[@taljune142010]

Thanks a lot for the tutorial which is very helpful to understand the difference between the two.
What about cold drawn welded tubes? Is that the same process or part of it? anybody has a link to a tutorial for such process?

[@rollformingbrotherunion4091]

nice video! Thanks!

[@mangeram2731]

Great thanks Sir

[@normtheteacher5485]

Very knowledgeable. Good job of explaining.

[@infinitymfg5397]

Thanks for watching!

[@hanscc27]

A superb explanation

[@infinitymfg5397]

Thanks!

[@bilbo_gamers6417]

So does cold rolling improve tensile strength even after the steel is annealed? Could you repeatedly cold roll and then through-anneal the steel to further improve the grain, or does annealing (normalizing) take away the strength created by cold rolling process? I ask because normalizing removes stresses from the steel, but does cold rolling have any effect on the grain at all? Also, what is the effect of hot rolling at low vs high temperatures? After annealing, will steel hot rolled at just past the recrystallization temperature be stronger than steel rolled at 1200C?

[@davidweston9115]

I am trying to figure out if Hot forged tools vs. Cold forged tools are better. For example, socket wrenches: Gedore sockets are hot forged, they claim this is better than cold. Hazet sockets are cold forged. They claim theirs is better. (Hazet have a lot more money as a company and produce more consistent looking tools than Gedore, but are they stronger???). In the video you say hot rolled is stronger, but you also say cold rolled is stronger. So which is it? (I suppose this is like asking is Lafite '59 better than single malt whiskey).
Obviously both methods work very very well because both of these German tool companies have thousands of users in Aerospace production and maintenance where money is not spared in hand tools (because a problem caused by cheap tools is infinitely more costly, so they actually spend more on tools to save money).

[@greenbubbleh2o437]

Thank you!

[@infinitymfg5397]

Thanks for watching!

[@ahmed7ega]

Best explanation ever , but what ia meant by the tolerance part in the comparison at the end of the video ?
And again very delighted and thanks for your great explanations

[@doodool101]

failed to mention that in the hot rolling process the grain structure reforms after the rolling process and the elongated grains reform into a smaller grain structure

[@pidevildog07]

Appreciate it sir

[@infinitymfg5397]

Thanks for watching!

[@tovetyll]

0:12 confused Jackie Chan!

[@infinitymfg5397]

Even Jackie Chan has a hard time with hot rolled versus cold rolled steel!
Thanks for watching!

[@julionoelopez4871]

thanksks for your explanation related to hot and cold rollled. But I have one doubt about quenched and tempered process, what is the difference against hot rolled process? Appreciate your help.

[@infinitymfg5397]

Do you mean if you heat treated cold rolled steel versus heat treating hot rolled steel? The differences would be the internal stresses of the materials but you would have to consider the grade (carbon content) of the steel as well.
I hope this helps, and thanks for watching.

[@lutfiyunuswahabalaudhah613]

I'm so interesting with this topic. Are there any impacts to the mechanical properties of steel if we heat treating hot rolled vs cold rolled steel ? And how ?
Thank youu

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Sir can you define ferrite, pearlite, martensite, austenite video

[@avijitDrilling92]

👍

[@afiqahsanbinmohamad3211]

your voice actually remind me of will smith. btw good video tho

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Yang Gang 🧢🧢

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Add the arabic translation, please

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