Types of steels

[@djstanstillmke]

thank you for making this video. Like a good professor should, you presented information clearly and without excessive detail. It will make it easier for a machinist's wife to understand why I'm irritable on "A-2 days".

[@ronfox5519]

Bravo! Very well done. Thanks for sharing this with us.

[@theoverengineer]

Glad you enjoyed it!

[@niklnikl1]

Excellent video explaining types of steel and their uses. Thank you!

[@theoverengineer]

Glad you liked it!

[@michaellapierre1244]

Thanks for pairing real-life examples with the classifications. Very informative!

[@theoverengineer]

Thanks for watching

[@allanrobichaud5821]

I am to begin a course in Steel Fabrication at our local community college. I know nothing about steel - this was well presented and very helpful. I hope my instructors are as "tuned-in"!

[@theoverengineer]

Unlikely. In broad terms and with quite some simplistic generalizing, 1 Most instructors are journeypersons, who end up teaching. They are not teachers. Neither are they engineers, metallurgists or chemists. They never upgrade with college courses either, most colleges don`t pay for such upgrades for staff. They want to run the business with minimal spending. 2 Metal fabricators calculate and fab stuff out of 1 type of steel - or so. Their curriculum does not cover anything covered in my video. Instruction about metals is limited to a "Do this, this will work." approach. 3 Your instructors are likely to be seasoned pros who are in fact excellent Metal Fabricators. Enjoy math, have fun throwing some sparks, discover and learn beyond the textbook minimum. Thanks for watching.

[@theoverengineer]

Welding gear review from class: kzbin.info/www/bejne/f57Vd3Sjr6tohNU

[@RelentlessHomesteading]

That was a good primer on steels. Thankyou. Seems increasingly difficult to find tools made from proper steels anymore - what is cheap sells the most; so we have ourselves to blame.

[@waynepowell567]

Excellent presentation. This is an area that has very little coverage. I really appreciate your video on this fascinating subject. Thanks for taking the time to share this.

[@theoverengineer]

Glad you enjoyed it!

[@martinda7446]

Very entertaining and delightfully presented. Excellent and no bullshit at all.

[@nfcopier1]

Thank you so much for taking the time to make this video! I'm an engineering student planning to do some garage projects, and I found this video extremely informative for that.

[@dragonmaster9360]

Excellent presentation. Well worth the time spent watching. Well spoken, easy to follow and understand mostly because of the "real world examples" that I have always seen but never understood . Thank you for taking the time to make this video. I am new here so perhaps I just haven't seen it yet but would like to see a video comparing the various high end fixed blade combat / bush knives.

[@paragangal]

Very Informative...like it

[@jaseberry6311]

Loved the tangible examples, thanks +theoverengineer!

[@magnodvd1971]

Informative and helpful, thank you!

[@maximumiq158]

excellent walk through and brush up. I'll be more alert now when looking at tools and equipment. thanks.

[@Borascythe]

This was incredibly informative. I learned a great deal about a topic from watching this video that I was completely uninformed about before watching.

[@theoverengineer]

Thanks for the feedback. I very often indirectly refer back to this video or use terminology from it. For a recent example, check out: kzbin.info/www/bejne/hpy3ZmmVjtySqc0

[@aaasktube]

Thanks for your time to explaning typs of steel ...i like it ...keep up

[@chinwakebhai]

Excellent video. I like your presentation style, and precise technical language which you relate to everyday items around us, such as nails and tools, etc. I'm certainly enlightened by the information.

[@theoverengineer]

Thanks for watching

[@MrDunk66]

Superbly simple presentation of information and clearly delivered. Really enjoyed the tutorial. Learn't a lot. Now when I visit the foundry I will know what they are talking about 👍 Thanks for sharing.

[@theoverengineer]

+Dunk O Idea: Shoot some video at that foundry, upload and link it with this. Thanks for watching.

[@idomake4429]

One of the most informative primers on basic steels I have seen. I would recommend getting some help from someone with some videography and editing experience polish it up a bit. That said, very good information if one can stay with it. Thank you for your work.

[@theoverengineer]

+Idomake Thanks for watching. These videos were shot on-the-spot to replace the expanded set-up in class. Definitely not HD, not anything, just holding camera with one hand while trying to work with the other ... If you know anybody sponsoring educational development, send them this way.

[@theoverengineer]

Sure do. What kind of knife? Scalpels get thin and superhard, bushwacking knife gets chubby and impact resistant.

[@theoverengineer]

Oooookaaay. Usual work flow is: find steel chunk, heat treat, draw knife design out, cut out shape, heat treat again, fit handle. I recommend a generic knife heat treatment sequence from Bob Loveless`s book Knifemaking p.57, 66: 1 Annealing Heat thoroughly to at least 1400 F (760 C) or past the Curie point, then let cool slowly in vermiculite or in an oven over a 12-hr period, not faster. After the grind, bevel and taper are done, 2 Heat up to same high temperature, quench in a barrel of cold oil, brine or water, clean blade, temper at 350 F (177 C) for 2 hours, then let cool in air to room temperature on its own. (No fans) It will be hard enough to hold a fine edge and not too brittle.

[@AvivMakesRobots]

Great inspiration, thanks!

[@JamesHall1980]

Well done! well thought out and helpful.

[@theoverengineer]

Thanks for watching & feedback.

[@JamesHall1980]

No problem, what is it that you do. You seem pretty knowledgeable about metals, yet you do a lot with bikes to. Just wondering?

[@theoverengineer]

Steel manufacturing is somewhat limited to - steel. With chemistry degree I would shoot for a bigger pie, metallurgy. Bettering steel for extreme applications (space, underwater, military) has been tried from all angles, new discoveries are made in composite metals, like Ni-Ti, Bi-F, Pt-Cu - just throwing out some letters there. Invent a kichen knife or drill bit that never needs sharpening, body armor that weighs nothing or vehicle body that weighs nearly nothing. Play with the patterns.

[@richardvermeulen3123]

Great lesson. Just what I needed. Thank you very much!

[@theoverengineer]

Thanks for watching!

[@haroldwestrich3312]

Thank you so much for the detailed explanation. I believe you are very knowledgeable on the subject. This has helped me a great deal in choosing the material for my project.

[@marconius101]

+Harold Westrich And me..

[@seanwolfe9321]

Great basic layout! Do I want more depth? Yes, you are great and simplifying a somewhat confusing system. Thanks much!

[@theoverengineer]

Awesome, thank you!

[@sanjaijain]

It's really nice , simple and quite a broad insight. Thanks for your efforts.

[@charltoncarswell9977]

You Rock at this. Thanks for the videos! Thanks for making it easy for a simpleton like myself!

[@wakefieldyorkshire]

What a brilliant informative down to earth lecture this is; i know i will keep watching this lecture over and over. By showing simple everyday products that we use you are makeing it easy to understand and are also managing to keep your audiance wanting more and more.

[@theoverengineer]

***** Thanks for the feedback and watching. Questions, ideas? Let me know.

[@wakefieldyorkshire]

It might make for an Informative video if you could do lecture on nut and screw threads, just a thought.

[@theoverengineer]

+wakefieldyorkshire I`ve got this: kzbin.info/www/bejne/nKDZaaGGr7R8bK8 on another channel. Keep digging around, some are more geometric, some are more calculation focused, such as this:kzbin.info/www/bejne/gmqcnaF3prt-Z6M

[@thinklearngrow1]

you are great sir, the video is just worth saving and watching again and again. you channel is like an angle helping to learn the things. My Mechanical engineering materials course even failed to impart this much knowledge. watching first of your video. hope to get more of this kind on this channel. Thanks again.

[@theoverengineer]

Thanks for watching. Here is my playlist of related videos kzbin.info/aero/PL9cPDQOOfTepp8sSTY7xoGsAmX5MUf-aS There is also a weldability spin on types of steels, kzbin.info/www/bejne/kH7Kf4xjnbCjbNE and another playlist on steel and material failure kzbin.info/aero/PLtsCbF7YOOwjLGSfkPQGBxoFkVyFNUotZ

[@allanrobichaud5821]

Good points. I'm still hoping for some quality teaching. At 69, retired from a non-trades area for 9 years, I'll need all the quality help I can get. Thanks for the feedback. I'm subscribed.

[@murtazamurshid]

Thank you sir for the great explanation of basic of steels. This video is useful for students and for industrialist as well.

[@theoverengineer]

Thanks for watching, I have other steel titles as well, just type "steel" into the channel`s search bar.

[@LTDANMAN44]

I came here because i was watching an 80's wwf wrestling match and randy savage hit champion tito santana with a piece of "cold rolled steel" and knocked him out. I needed to find out what that ment

[@constantinosthrasyvoulou2553]

Excellent presentation. Thanks

[@Dornatum]

a very good video. I feel enlightened

[@Mr_Secrate__]

Hi dear sir will u attach data sheet which u showing in this video. It is very useful and easy to keep in mind after watching video. I will attach it with my notebook. While doing study i will use it for reference. Thank you.

[@murtazamurshid]

One request to you that can you make video on explanation of similar composition steels on different standards.

[@WXUZT]

Thank You for your effort and time !

[@gaggemums]

Thank you very much sir! I have been wondering for some time now what all the letters and numbers stand for. Excellent explanation!

[@HollywoodCreeper]

What is the best steel for a pot to cook with if I wanted to buy the best? A lot of poor Hispanic people in NYC and other people have this low quality cookware that is not brand name. I find it in abandoned storage units and sorry yard sales. The metal sucks. I need to use a big pot to cook some pickled beets, and I happen to have one of these cheap big 'poor person' pots. Using one of these 'poor person' pots under heat, do you think sulfur and phosphorous will slightly leach into the food?

[@stevefriedlander7053]

Thank you. Well explained and very helpful information!!!

[@vijaypriyaa8754]

Very good explanation.... Thanks

[@shaunzhu331]

Thanks for the video mate, it helps a LOT.

[@ShakilAhmed-oc7mf]

Thank you sir...its really informative. Its clear my basic concept about steel.

[@shiyaskollam]

Thank you very much..Nice and simple way of presenting ..very clear accent to understand for people from any area of World..Thanks.. Please do more videos like this about related subjects..more deeper..

[@theoverengineer]

Thanks, there is more on kzbin.info

[@EdSchneeebly]

Fantastic video! I'm really interested in steel manufacture in industry, and am considering doing a Masters in Chemistry, possibly a PhD in Chemistry after the masters. What sort of opportunities do you see for someone with those qualifications in the Steel industry, or any related industries? Obviously i have been doing research, but all information can be valuable. Really good video, nice and comprehensive and well thought out, cheers

[@foundyet]

Thank you! This answers my question about HSS as I bought some wood lathe tools and they were labeled as HSS.

[@theoverengineer]

Nice, tell us how they last and sharpen when you get to it. Thanks for watching!

[@radon222u]

Great video. Could you suggest materials for loudspeaker core structure (top plate and T-yoke)?

[@theoverengineer]

Never worked with speakers, no clue whatsoever. Thanks for watching, though!

[@johnnymotorboat8824]

Rebar is usually high carbon. Hammers are tool steel usual w1 or o1.

[@Ninz306]

24:59 well spent... Thank you sir

[@theoverengineer]

Ninz306 Thanks for watching!

[@rhythmandacoustics]

Excellent, especially how to spot fake or over claiming items on the market.

[@rudimarth5004]

Learned a lot,Thanks. Rudy

[@camilewis87]

Where can I get these steel documents in your video?

[@Joebunkyss1]

great vid....i use axles to make masonry chisles.....cut with a grinder and ground on a wheel.

[@arindammaity9603]

nice video it makes all easy

[@glcboxer2012]

Nice video! Well prepared. I liked the examples of items made from each steel type. that really helped! God bless.

[@mbs100k]

Thank you so much, you helped take out a good bit of mystery. Very informative, and well instructed.

[@IvanZ88]

Thanks a lot for this video! You presented very well many types of steel with good example and costs. What I miss for my project is the weldability of kinds of steel, the hardening (how hard is the particular steel after hardening and before) and the surface treatment. If you will have another video on that, that would be great!

[@theoverengineer]

Ivan Levels of hardness is produced by either (1) "cold work" - forming, bending, extruding, ... (2) "alloying" - carburizing, nitriding, high carbon steel, alloy steels, tool steels ... (3) "heat treatment" - quench & temper, anneal, Mild steel is weldable, anything alloyed (Carbon or anything) is tricky or impossible Some ideas are embedded here: kzbin.info/www/bejne/baisqoadjq2KapY or here kzbin.info/www/bejne/r6mklZiVoM1jgqc or here kzbin.info/www/bejne/aWrEmaOZm7yCe68 Just type in keywords "brittle" or "ductile" on my channel, see what comes up. I guess I can make a comprehensive video on what I just typed up, too. I`ll think up some visuals for it. Thanks for watching.

[@IvanZ88]

theoverengineer You're awesome! Thanks for the info!! You were a big help!

[@theoverengineer]

Ivan bitte schön

[@IvanZ88]

theoverengineer spasibo

[@rohansharma1118]

hey buddy ..video is really helpful.. can you make a video in which you describe all type of steel available in market and how they are known like hss 18-4-1

[@theoverengineer]

Sure, thanks for the idea. Will send as link.

[@ramukaka492]

Very good lecture sir

[@umakanttoge8855]

Very nicely explained

[@benevans7764]

So you mentioned that some tools are made of medium carbon steels if they are intended to be resharpened. But stainless steels and high speed steels are more durable so they may not need to be resharpened. If I wanted to make an axe head, what type/grade of steel do you suggest?

[@theoverengineer]

Axe head : Most durable materials: 316 stainless, a.k.a. 14-12 stainless, does not hold an edge Best edge retention material: tool steels, including high-speed steels, none of them are resistant to corrosion The edge has to withstand shock or impact loading without shattering and chipping. Medium carbon steel is a reasonable material, since having an edge is more important than resistance to corrosion. Axe needs to be made with forging, in a forging press under thousands of kg or lbs of pressure, at a forging temperature. Without the right method at the right temperature, an axe head could be shaped but won`t work as an axe. Just a decorative mantelpiece.

[@benevans7764]

theoverengineer. So a simple blacksmithing forge to heat the metal and 2 lb hammer should suffice? With heat treatment and tempering of course

[@theoverengineer]

Give it a go, see how it turns out, chop some wood, shoot a video and tell us about it.

[@benevans7764]

theoverengineer thank you for the advice. This is very helpful

[@ixamraxi]

Not sure if you still read these, but I had a quick question. The xx in the designations, such as 10xx, do they refer to the % of carbon? For example, 5160 would have Cr 0.80% since its 51xx. but then would it have 0.60% carbon? Or, for 1095, would it have 0.95% carbon? Just curious if I was understanding that correctly, and thanks for the answer!

[@theoverengineer]

+Amra That`s right, it works exactly like that in carbon and alloy steels.

[@ixamraxi]

Thank you so much for the response! That is extremely helpful :)

[@jake1qaz]

Very Informative Thanks!

[@carolshawol6699]

Good video but high strength steels can be welded but with correct procedure

[@radioguy1620]

Thanks for posting but would have been a bit better with a cleaner bit of camera work, everything looks a bit off center, although a good description.

[@theoverengineer]

+radioguy1620 I also had no script or hope for any editing so it had to be done in 1 take and was shot it with a no-adjustments $50 point-and-shoot camera with all the lights on in the featureless room that makes sound echo quite a bit. And I only found black flipchart marker. Next time I re-shoot will be in 3-D and a crew of 12.

[@wolf8182]

Koslow test kits can help identify steels

[@adrianwolf4570]

what do you think about the 80CrV2 Steel blade knife ?? for Survival - Bushcraft/Outdoor knife use ?? do you think is it durable or not ?? whats the best stone to sharpening the blade ?? 80CrV2 Steel knife blade is it weak or is it strong ?? thanks

[@theoverengineer]

Blade looks good on paper. Hope they use what they claim they do, hope they make it as it should. Here is how it looks like when they have a clue: kzbin.info/www/bejne/pqHIlHd8lrGmnac Types of stones don`t matter much, particle uniformity does, together with particle hardness, particly crystaline structure and behavior. Here is my take on sharpening: kzbin.info/www/bejne/gqrXn4injd-Hgac

[@adrianwolf4570]

ok thank you for quick response and good advice :)

[@banno6938]

Interesting video ! Can you please explain the difference between H2o & oil quenching on steel ? I have also seen stamped on commercial type steel Truck frames that they should not be welded . In your opinion is there any way to properly weld a broken or cracked frame with that stamping ? Thank You .

[@theoverengineer]

During quenching the microstructure of steel changes. In quenching, red-hot steel`s microstructure called "austenite" turns into "martensite', regardless of the quenching medium. (Brine can also be used). Martensite is extremely hard and brittle. Water cools faster, oil cools a bit slower. In water quienching, more of the austenite forms martensite, and less of it forms pearlite - a softer form of steel. In oil cooling more pearlite forms and less martensite, so the finished steel is more ductile, less brittle. Welding changes the microstructure of steel around the weld, all martensite and pearlite will transition into "ferrite" a very soft and weak form of steel (nails, rebar, roof flashing). In addition, all the fine dissolved carbon runs and clumps together and solidifies into streaks and layers of graphite (same stuff in pencils). It just breaks right there, graphite has zero strength. Even if the weld is quenched somehow to form martensite, graphite layers will still form, it is not reversible and be a weak layer in the weld area. So: it can be welded, it just won`t hold. Like trying to weld the claw back on a hammer, pretty until you pull a nail and breaks 10 seconds into it.

[@NOBOX7]

i have herd oil quenching ads carbon to the metal this also makes it harder

[@theoverengineer]

NOBOX7 Laying steel in a charcoal bed for 4-10hrs will add a quarter of a single percent of carbon to the steel, to a depth of 5 -10 microinches, a 45sec oil quench does nothing. Added carbon only makes the steel harder at the depth of the added carbon, microscopic amount of surface hardening. Done on gear teeth and shafts commonly.

[@RuDyCaM81]

Great video! thank you! Question: I just got a Cold Steel Katana, what does the 1055 Carbon mean?

[@theoverengineer]

+Rudy Cambara Chemistry-wise 0.55% carbon is in the steel which makes it hardenable by heat treatment (power sharpening can destroy it), has some give and not super brittle. Will rust right away unless protected. It was probably cheaply cast in a mold with no sign of going through upset forging. Physics-wise a katana`s making, center of gravity and weight distribution are just us important.

[@RuDyCaM81]

+theoverengineer Thank you for responding so quickly!

[@Toho2782]

Thank you for your time great video

[@theoverengineer]

Thanks for watching!

[@arindammaity9603]

can u give the periodic chart again with all mechanical properties like ductility, malleability,etc??

[@theoverengineer]

Hmmm. Which one? Periodic charts don`t list mechanical properties.

[@Mech.Masters]

Is EN36 ( Case hardening steel) a low carbon steel ?

[@theoverengineer]

No, completely different steel numbering system. Its Carbon content is 0.12-0.18%, which is the mild steel range. EN36 is also alloyed with Ni and Cr which make the steel case hardening. EN36 is similar to SAE 3400-series Ni-Cr Alloy Steel. EN36 is suitable for roller and ball bearings of extra light section, aeroplane and motor crankshafts requiring hard surfaces for roller paths, connecting rods with case-hardened ends, as well as highly stressed gudgeon pins, gears and certain types of collets.

[@sreyassriram8077]

Great Video! Thanks a lot .

[@adrianwolf4570]

so wich kind/type of Steel is the Best for the Blade Knifes ?? wich one is the Strongest,Durable, and Impact Resistant Durability/Hardness ?? with non-rolling chip,edge ??wich one can retain the sharp edge for long time ?? and wich one is the best sharpener for it ?? waterstones ??diamonds , what else ?? thanks

[@theoverengineer]

Blade knife for what? Surgery? Bush whacking? Skinning deer? Chip carving? They all need completely different materials, completely different heat treatment, completely different blade geometry. I strarted a series on strength, durability, impact resistance, hardness and other things at: kzbin.info/aero/PL9cPDQOOfTepp8sSTY7xoGsAmX5MUf-aS

[@adrianwolf4570]

is a Survival Knife Custom Made by a friend for Bushcraft and Outdoors , is a good Chopper aswel is made for heavy works ,out in the wilderness , chopping trees hunting , makeing shelter etc . Knife specs 7" blade(20cm) 3/16"( almost 5mm) thick. Steel is 80crv2 .he normalize the steel with 3 cycles. Do 1 heat treat and quench, and 3 cycles of tempering is that any good for it? thanks

[@theoverengineer]

Nicely made so far, will need to keep it dry but should last a long time, especially if the edge is ground on it properly.

[@adrianwolf4570]

ok nice to know that ,thank you :)

[@muhaiminchoudhury2866]

Adrian Wolf 440c stainless steel best for Knife. It's the strongest steel ever.

[@chrisplayz253]

That was v interesting bro 😃

[@theoverengineer]

thx

[@RovingPunster]

You omitted Type S (shock resistant) tool steels.

[@sahilgupta5691]

can i paint on steel ? i want to manufacture steel doors and windows with wooden like paints on it, but some people told me that steel cant hold paint for long ....

[@theoverengineer]

+Sahil Gupta I`m sure you can. It is also possible to paint steel. Needs proper surface prep: cleaning, pickling, priming, drying or possibly baking in a kiln between top coats, depending on paint type.

[@Gabriel1o1]

thoroughly enjoyed it thanks

[@Ouroboros90]

So if one was to get into blacksmithing, and more specifically bladesmithing, what specifications would be required for quality products? Alloys? High carbon steel? Tool steels? And then going a step further, if getting into damascus pattern forging, how do you vary the steels enough to see a pattern without creating a weakness in the blades?

[@theoverengineer]

DaigenHyorinmaru Weakness is not a metallurgical term. Brittleness? Low tensile strength? Low toughness? Lacking hardness? Surface hardness? Lacking impact resistance? Inclusions? Porosity? Slag? Lack of fusion? Delamination? Lacking balance? Blade not flexible? Low elongation? Do specify. Might want to start with a metallurgical textbook from library.

[@camaroguy2919]

DaigenHyorinmaru I recommend sword buyers guide. this is good info www.sword-buyers-guide.com/buy-swords-online.html

[@theoverengineer]

Good resource, thanks for sharing.

[@VicariousReality7]

+theoverengineer ..... fusion?

[@wrackspurtsn5516]

is high carbon steel same as hard steel? if they arent same, can you explain a little bit whats a hard steel

[@ke6gwf]

Hardening is basically a heat treating process, and can be applied to any type of steel, though some will get harder than others. But it is a different subject.

[@craigmunday3707]

Awesome lesson thanks

[@rajno17]

I just watched your video.. very informative!! Thank you so much.. But i have one doubt if you don't mind in clarifying, we use some terms like Plain carbon or mild steel, how does these get into the steel grades explained in your video? Thanks in advance!!

[@theoverengineer]

Kanagaraj Subramanian Plain carbon steel = low carbon + medium c + high c groups, mild steel = higher end of low carbon nut not as high as medium carbon steel. In North American standards by SAE/AISI (differents from British, Japanese or German standards) the carbon content in low c = 0.05% - 0.3%, mild steel = 0.15% - 0.3%, medium c = 0.3 - 0.6%, high carbon = 0.6 - 0.9%. By definition steel can contain 2.1% carbon, but it does not make a practical difference if a steel is 1.3% c or 2.05%, so nobody makes steel over 1% C. All % is by weight. What steel designation numbers mean (1080, 4150) kzbin.info/aero/PLtsCbF7YOOwjLGSfkPQGBxoFkVyFNUotZ

[@cklmathew]

Where can i find those 1080 steel data sheet

[@theoverengineer]

Here www.matweb.com/search/QuickText.aspx?SearchText=1080

[@mechanicable5741]

is cr-V more durable than cr-Ni? what's the difference when it is used to make tools?

[@theoverengineer]

+Mirage ™ "Durable" is not a standardized material property. But read on: Both the SAE 3000 series Cr-Ni steels and the SAE 6000 series Cr-V steels, say 3120 vs. 6120 are very similar in strength, elasticity, shear deformation, impact resistance, weldability, machinability. All their alloying elements are all under 5% total content. Both Cr and V are added to increase surface hardness. Ni makes steel less brittle in Arctic cold (under impact) and somewhat resistant to corrosion (depending on %). Cr-Ni steels are heat-treatable deep hardening steels. They make drive shafts, gears (tranny) and axles from it, so they are hard on the surface but give under shock loads. Cold service environment is likely. Low-carbon (under 0.35%) versions are weldable. Cr-V is used more for high speed cutting tools, springs and bearings where high hardness is required but also give under repeated loading cycles. V retards grain growth at elevated temperatures, so hot edges stay sharp longer. Hot service environment is likely. In hand tools at room temperature the differences don`t matter. It`s like eating pizza made with winter wheat and spring wheat. As long as they`re baked right, they work.

[@mechanicable5741]

theoverengineer Wow thanks. I wish you were my best friend.

[@essam1816]

Thank you so much for this useful video

[@Trudeautthebestt]

there is somehing called High strength low alloy steel HSLA

[@dadricriggs]

Thanks for the Lesson.

[@theoverengineer]

Thanks for watching

[@jimp6576]

Thank you, now I know more than l did.

[@donnyfward]

Very informative. I enjoy learning about metallurgy. What does the designation 304 mean as it pertains to stainless steel? That's a Great video.

[@theoverengineer]

donny ward digit 3 means "austenitic" stainless group, and 04 is just sequential, the 4th mix. Non-magnetic, soft & formable, excellent corrosion resistance. Sinks, faucets, strainers, kitchen stuff with no edge.See chemical composition and a bit about properties here: kzbin.info/www/bejne/ZpeucnmvqJ5laZo

[@ashishtiwari1912]

donny ward 304 refers to class of SS,as it mentioned in the video about types of SS-Austenite,martensite and duplex SS.Austenites have 200 and 300 class,so if you find anywhere with the label of 304,316 that's austenitic stainless steel..304 is also widely known as 18/8 stainless steel,18% chromium and 8% nickel basically and used for surgical items,the other 316 is 18/10 chromium being 18% and nickel 10%,its used in kitchen cutlery and sinks...i think 200 class stainless steels are less corrosion resistant as compared to 300 class....and yes Austenite SS also makeup a huge part of Pressure parts in Industrial boilers preferably for making superheaters and reheater tubes capable of withstanding high pressures and temperatures.so Austenite SS makes majority of the SS produced in the market,swiss knife like shown in the video is strong and tough,its made up of martensite..duplex has roughly twice the strength of Austenites.

[@donnyfward]

Thank you for this information. I frequently weld 308 formed plate and 308 pipe. I noticed my fitter's magnet wouldn't work on SS. I've been curious what determines how magnetic SS is. I'm guessing it's the amount of chromium in the steel. Thanks again for taking the time to respond.

[@theoverengineer]

donny ward Not the chromium. Austenite. Austenite is a special crystal, atoms locked in it won`t be magnetized. Now envision a cube, with atoms sitting at the corners + 1 in the middle of the cube. Austenite has this body-centered cubic crystal lattice, ferritic and martensitic steels are magnetic & are face-centered cubic.

[@kingco-bruh7271]

Great stuff

[@MephistoRolling]

great video, thank you very much.

[@iancho9587]

Well done Sir

[@আল্লাহরগোলাম-ষ৬ঞ]

please give me answer, which steel are strong,high carbon steel vs high speed steel.is the high speed steel rustproof?

[@theoverengineer]

High speed is stronger, does rust.

[@আল্লাহরগোলাম-ষ৬ঞ]

many many thanks brother.I find this question many days but don't mind I want to know another answer please tell me high speed steel melting point.

[@theoverengineer]

Liquid at about 1550 C

[@আল্লাহরগোলাম-ষ৬ঞ]

thanks brother.

[@KrisMinnear]

That 1045 sprocket should probably be with the medium carbon category.

[@theoverengineer]

It should be. Thanks for watching!

[@EliteTKDAust]

Thanks, great video

[@theoverengineer]

Thanks for watching!

[@moypatel5554]

Thank you for your knowledge

[@smith951]

Wow super helpful ty

[@marvmeyer9026]

good job

[@corydzbinski]

Good info! EN doesn't mean European Norbs or whatever you said though, EN is Emergency Number which are the British steel standards.

[@theoverengineer]

+Cory Dzbinski EN is European Norms, as in en.wikipedia.org/wiki/List_of_EN_standards

[@reddragon6317]

Really helpful