Steel Numbering System

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  • Опубліковано 30 січ 2025

КОМЕНТАРІ • 359

  • @lukebrennan5780
    @lukebrennan5780 6 місяців тому +286

    VERY plain and simple. No noise, no crap. WELL DONE!

  • @sanseijedi
    @sanseijedi 6 місяців тому +153

    I watched this with no real need beyond basic understanding, but i find someone offering even esoteric knowledge so clearly and jargon-free is irresistible. Really well presented; my thanks!

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому +7

      Glad it was enjoyable!

    •  5 місяців тому +4

      Same here!

  • @whathappened2230
    @whathappened2230 6 місяців тому +49

    Masterclass on how to present information correctly and concisely. Thank you!

  • @brianbender7438
    @brianbender7438 6 місяців тому +65

    Very well done. Like another person said, no obnoxious music or jarring graphics. Just good information well presented. Thanks.

  • @santaclaus8384
    @santaclaus8384 6 місяців тому +76

    One of the best short intro to steel types I have seen. Super cool. :)

  • @philmann3476
    @philmann3476 6 місяців тому +28

    I'm not much of a metalworker, but always wondered what those numbers meant. Many thanks for a concise, helpful and informative explanation. Well done.

  • @petersipp5247
    @petersipp5247 6 місяців тому +58

    Real informative. Nicely presented. I like the cards with the numbers plainly written. Easy to follow being able to see the numbers as you spoke about each one.
    Thank you.

    • @boblawson1006
      @boblawson1006 6 місяців тому +2

      " I like the cards with the numbers plainly written. " Inspired, possiby, by Bob Dylan's 1965 'video' that accompanied his song "subterranean Homesick Blues" He used flashcards to, perhaps, imprint the lyrics in our minds... Seemed innovative then, but probably had precedent in silent movies? It is, good, though, in that the data is front and centre, we're not distracted by a presenter turning to a board behind him...

  • @rogerferris3720
    @rogerferris3720 2 місяці тому +9

    Excellent presentation, the other comments say it all. Clear, concise, no crap.

  • @TheVillageIdiotUk
    @TheVillageIdiotUk 6 місяців тому +9

    An object lesson in presentation; no fluff, no guff and absolutely on point. Thank you for taking the time and trouble. Bravo !

  • @daledurbin2354
    @daledurbin2354 6 місяців тому +9

    Thank You! I learned something that I should have learned 60+ years ago.

  • @serhiizabobonin1016
    @serhiizabobonin1016 2 місяці тому +3

    Thank you from Ukraine. Before this video I knew of Soviet Union steel marking. Good and simply explanations.

  • @peterhall6656
    @peterhall6656 13 днів тому

    Very informative for someone like me who is not a toolmaker.

  • @pb68slab18
    @pb68slab18 6 місяців тому +16

    Good info! This is the system I learned when I started my T&D apprenticeship back in '77. But there seems to be a bunch of trade-names and letter/number combinations for todays 'designer' alloys.

    • @basilwatson1
      @basilwatson1 6 місяців тому +4

      hahaha ya beat me to it ! Exactly

    • @mpetersen6
      @mpetersen6 6 місяців тому +3

      There have always been trade names used by steel producers. Some l can think of just from using them . Graph-Mo (O-6) from Latrobe Steel. They also had Graph-Air (A-10). Both graphitic tool steels with excellent machinability. Hy-10M. An oil hardening die steel. Mirralloy. A TG&P shafting steel. Carpenter 158 (P-6). Oil hardening mold steel also used for machinery parts. Then there are the non ferrous metals. Having both trade names and common names. The Ampcos, Mic 6, German Silver (copper-nickel alloy) and others.

    • @pb68slab18
      @pb68slab18 6 місяців тому

      @@mpetersen6 Yep, we used to buy so much we'd get a trailer direct from Carpenter. 16ft lengths of A6 Vega, S7 Bearcat, O2 Stentor, A2 Air-Wear, etc.
      Crucible has own their trade-names too.
      CPM-123-xyz is what I'm seeing a lot of now. And it seems todays designer knife-makers have their own alpha-numeric code which I haven't figured out yet.

  • @captcarlos
    @captcarlos 6 місяців тому +15

    Very good short intro to a Big subject.
    Thanks.

  • @Chris-bm5qd
    @Chris-bm5qd 2 місяці тому +3

    Brings me back to late 70's apprenticeship in Detroit.

  • @joelalleman9591
    @joelalleman9591 6 місяців тому +7

    we used 4340 for the axles on our drums for head and tail pulleys on our elevator belt unloading conveyors due to it's added toughness over 4140 . we used the higher grade as used in the mining industry for durability . thanks for an easy to understand , well explained video !!

  • @oscardominguez6491
    @oscardominguez6491 5 місяців тому +2

    Jason, great and enriching video. Thank you for sharing your knowledge with us. The world needs more people like you!!

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  5 місяців тому +1

      Thanks for the kind words! Glad to hear it was useful to you.

  • @weldmachine
    @weldmachine 6 місяців тому +6

    I get good results from using 1045.
    A good general use metal is especially popular for CNC Turned components.
    Another positive of this metal is that it can be hardened to well over 50 Rockwell in either Water or Oil.

  • @slimeminem7402
    @slimeminem7402 6 місяців тому +2

    I just clicked on the video and I don't know if it's good or not, but I just want to send some appreciation just for posting the video and trying to share the knowledge 🎉

  • @MrDizzle715
    @MrDizzle715 5 місяців тому +1

    I work in a forge shop as a designer, brand new to the industry. I’ve got a whole list of different kinds of steel with their densities which I use for calculating weights among other things. This was pretty informative.

  • @tomday7309
    @tomday7309 6 місяців тому +1

    Great job! I worked with various alloys during my career as a product developer and with all the ones you clearly explained here. Most of the steels I used needed wear resistance and impact resistance. As with any metal, the more exotic the alloy, the higher the cost and lower availability. I used the Machinery's Handbook as a guide for material selection for years. As with many resource materials today, it is available in digital form as well as print.

  • @abmbarry
    @abmbarry 6 місяців тому +3

    Thank you for such a well presented description.
    This is so refreshing in a vast sea of Hype, BS and Content theives that simply repost with a usually very inacurate Ai voice over.
    I will be forwarding your link. And Yes, I have subscribed. I very seldom do.

  • @leoncellier4719
    @leoncellier4719 3 місяці тому

    Fantastic, I don't have anything to do with steel apart from day to day life but your clear and concise description made an interesting video on a subject that has always been at the back of my mind when looking at different uses of steel, thank you, have a good day.

  • @basilwatson1
    @basilwatson1 6 місяців тому +23

    The SAE system is pretty straight forward What annoys me is when you deal with "older"? Machinists they use "trade name " like "silver steel" so I cant make quick decisions on steel as I have to look up the trade name THEN we get on to the Japanese system it would be really nice if there was ONE system

    • @georgesheffield1580
      @georgesheffield1580 6 місяців тому +4

      Many other STANDARDS have very different specs. for specific purposes that do not fit into the SAE system . Not all specs are based on the content but on other qualities .

    • @stevebelcher1527
      @stevebelcher1527 6 місяців тому +8

      I knew an ( old machinist ) that could look and listen to the steel and tell you what the content was and if he needed to know the amount of carbon the grinder could tell him that . Sadly the old machinist are gone for the most part and the new breed of cnc college born people who cant fix anything without an analysis

    • @sparked3113
      @sparked3113 6 місяців тому +6

      Yeah, silver steel, kite, keewatin, high speed. We used to colour code and stamp the steel stock .

    • @Chauvin-r9u
      @Chauvin-r9u 2 місяці тому

      Try German steel

    • @thedolphin5428
      @thedolphin5428 12 днів тому

      Well THERE IS. It's called The Universal Metric System. But the arogant, imperialist Yanks keep away from using it and insist the rest of the world be confused by THEIR system(s).
      Did you know that the USA is *the only fkn country on the planet* which has not gone metric, despite 1960s, 1970s, 1980s Federal Legislation to do so. But many different states and lazy, obstinate citizens refuse to change.
      Poor old China has to tool up for two standards of industrial manufacture -- metric for us conforming folks and US Imperial for The Arogant Ones. If China wanted to bring the US to its knees, all it would have to do is to stop making imperial bolts!

  • @tiagoferreira086
    @tiagoferreira086 5 місяців тому +1

    Never saw a video of this channel, but i liked how it was explained, always had this doubt in my mind but i never had actually searched for it 😂

  • @RegularGuy-j4l
    @RegularGuy-j4l 6 місяців тому

    First rate! Thank you very much. Simple and easy to follow. I know it gets more complex, but this is a great start.

  • @FFSytstoptryingtobetwitter
    @FFSytstoptryingtobetwitter 6 місяців тому

    This was really straightforward and helpful, thanks so much for taking the time to make this video.

  • @StrayWolfForge
    @StrayWolfForge 6 місяців тому +9

    Thanks for the very informative video!

  • @billybupkis3688
    @billybupkis3688 29 днів тому

    Great teaching video. Thanks for the information.

  • @AbbyTaylor-yj9wn
    @AbbyTaylor-yj9wn Місяць тому

    OUTSTANDING video! Thankyou! Saved for future reference

  • @rufustoad1
    @rufustoad1 6 місяців тому

    Excellent job. You could be the only person that has explained this this well. Is sheet the same numbering and what is better to machine/turn?

  • @leor2830
    @leor2830 6 місяців тому +3

    Good introduction to a few basic steel types
    We use a few different more specialized types in our product (engineered steel chains)

    • @dielaughing73
      @dielaughing73 5 місяців тому

      Yes, just to be simple you guys use an 'S' or a 'T'. Or perhaps a number like 60 or 80. And they're interchangeable..

  • @mohamedelbadry1529
    @mohamedelbadry1529 Місяць тому

    Wonderful and important information ❤

  • @JRo250
    @JRo250 5 місяців тому

    Very well done, thank you.
    These videos are becoming a rarity on YT. Videos that are practical, useful, and helpful take a backseat to flashy, "sponsored", overly-produced marketing material made to promote and commercialize the channel.

  • @jimmurphy6095
    @jimmurphy6095 6 місяців тому

    Thanks for taking the time to put this together. Very informative.

  • @n6mz
    @n6mz 6 місяців тому +1

    And then there's my FAVORITE: 12L14. 0.15-0.35% Pb makes it a joy to machine, especially for novices such as myself. Thanks for the excellent vid.

  • @crabby7668
    @crabby7668 5 місяців тому +1

    Very interesting. It would have been a bonus to understand how the spark stream can roughly tell you the type of steel. That is real wizardry

  • @kennyrmurray
    @kennyrmurray 2 місяці тому

    These videos are great! Thank you! I wish I was young enough to actually remember all of this but I put these into my favorites. I was wondering when you were gonna get to 4340 because that’s what my SBC crankshaft is. I have a Bridgeport mill and Clausing lathe. I’m a home hobbiest and love it! My mind is everywhere lol. I love learning. I’d like to melt down some cast iron to make a follow rest one day because somehow they lost it. Almost bran new 80’s machine. 12X40 VS-12. It has zero wear luckily. It still has the original belts on it too. I got lucky. I want to learn hardening steel and aluminum. Do you also work with aluminum? I think these kind of videos will do really well

  • @graxav
    @graxav 3 місяці тому

    As a former toolmaker - we used a lot of Bohler's 476 tool-steel - came in black coarse finish - that had to be removed first. It gave off a very definite 'stink' while machining and bright purple shavings - quite unlike anything else.

  • @collidium
    @collidium 5 місяців тому

    Excellent video - well done and well explained. Great presentation style.

  • @ryanwilson5222
    @ryanwilson5222 6 місяців тому

    Thank you Ron Swanson of the steel world. I enjoyed this

  • @steveferguson8047
    @steveferguson8047 23 дні тому

    You might reference these are SAE designations. Thanks for the video!

  • @joebloe9901
    @joebloe9901 5 місяців тому

    Great stuff but I would have liked to see something about music steel AKA spring steel.
    I guess a complete video would go on for days.😃
    Thanks for this video...its a great introduction.

  • @stepannovotny4291
    @stepannovotny4291 Місяць тому

    Thanks for this. Good 1st time intro.

  • @adamt5986
    @adamt5986 6 місяців тому +2

    Wow next time I buy knives I’ll be so much more informed. Thank you😊

  • @EliasDLC-p6s
    @EliasDLC-p6s 18 днів тому

    Very informative. Thank you Sir .

  • @mitchellhw2006
    @mitchellhw2006 3 місяці тому

    Extremely handy information. Thanks for the video.

  • @jayski9410
    @jayski9410 6 місяців тому +2

    I've always wondered if you could use one of those Xray spectrometers that gold dealers use to verify precious metals on steel? Machines like the XRF spectrometer or the Sigma Metalytics verifier can not only tell you the percentage of gold, but the percentage of what other metals may have been alloyed with it. Most often copper, silver, palladium, or zinc. And in the knife world you hear all sorts of numbering systems. Plus the word magnacut steel gets touted as top of the line.

    • @andrewc9902
      @andrewc9902 6 місяців тому

      XRF will pick up the other elements of interest in steel such as nickel cr mo si mn and tramp elements such as S and P and others (with varying degrees of accuracy at low percentage levels) but EF cannot pick up the most important element carbon. Some of the tools will try to basically guess what grade of steel it is given the ranges of other elements but for example, if you had a 4145 steel the tool might guess it as 4150 or 4140, but it doesn’t actually determine the Carbon you need a different tool for that.

  • @melgross
    @melgross 20 днів тому

    What I would have liked to see, for those who don’t understand this is the exact meaning of the first two alloying numbers. So, the 4 indicates that it is a molybdenum steel, while the 1 indicates that it has chromium.

  • @erikbrigham8807
    @erikbrigham8807 3 місяці тому

    Thank you for making things come into view.

  • @Ali_ON3
    @Ali_ON3 25 днів тому

    Excellent video!!!!

  • @beakhammer2638
    @beakhammer2638 5 місяців тому

    Very interesting. I'd be interested to know about other alloys especially for marine use. Many thanks. From Ireland.

  • @DixieGeezer
    @DixieGeezer 6 місяців тому +4

    Question: Just noticed ceramic ball bearings are now being used in bicycle racing carbon wheels. What future does ceramics have in the Machining Industry?

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому

      Good question.

    • @vittocrazi
      @vittocrazi 5 годин тому

      im im correct, they are dropping the ceramic bearings for nitrided balls on ceramic races for the highest quality bicycle racing wheels

  • @Joe_6_Pack
    @Joe_6_Pack 6 місяців тому

    I loved milling P20, beautiful characteristics.

  • @lanceleavitt7472
    @lanceleavitt7472 5 місяців тому +3

    Not a machinist, surprised such low percentages could make so much difference in performance.
    -- Thanks for the quick education. ---

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  5 місяців тому +1

      Very welcome! Yes, a minute difference in carbon content makes a big difference in performance.

  • @normangiven6436
    @normangiven6436 6 місяців тому +4

    4140 & 4150 steels are used in gun barrels. Good stuff.

    • @Hertog_von_Berkshire
      @Hertog_von_Berkshire 6 місяців тому +1

      ... Bad stuff.

    • @filster1934
      @filster1934 5 місяців тому

      @@Hertog_von_Berkshire, let me guess, you're a stainless barrel aficionado. They're cute, but, Melonited 4150 barrels will make stainless go bye-bye.

  • @mhansl
    @mhansl 5 місяців тому +1

    Excellent! Always wondered. Thank you. Now, please, do stainless.

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  5 місяців тому +1

      Great suggestion. I am considering a basic metallurgy series. What else would you like to see on those lines?

  • @andyb7754
    @andyb7754 6 місяців тому

    This was a very informative and interesting video, thank you.

  • @ericberman4193
    @ericberman4193 3 місяці тому

    Good video ~ very informative.

  • @johnblanton-fd3jf
    @johnblanton-fd3jf 6 місяців тому

    Great info! Glad I stumbled upon this video , subscribed so I can learn more.

  • @KrisKasprzak
    @KrisKasprzak 3 місяці тому

    Great video, thanks for posting

  • @michaell397
    @michaell397 2 місяці тому

    The "D" in D-2 steel stands for Die Steel and is still used today for die making punches and shear blade for working other metals in industry. ;

  • @MCPEMadEnder916
    @MCPEMadEnder916 6 місяців тому

    I've been involved with BMX since the late 80's and 4130 has always been the absolute standard for frame selection, nothing else has ever done including Titanium (high tensile strength but low sheer strength) or aluminum (requiring a thicker wall diameter to accommodate strength). the closest to match 4130 chomoly has been 7076 T6 Aluminum, the same thing commercial airplane frames are made of

    • @MCPEMadEnder916
      @MCPEMadEnder916 5 місяців тому +1

      @@jamisonr I used to have a GT Dyno with white Skyway mags, still miss that thing. the BMX frame I have now is 4130 and only 4lbs made by a British company called Total

    • @MCPEMadEnder916
      @MCPEMadEnder916 5 місяців тому +1

      @@jamisonr I don't get along with larger wheel size bikes, been riding BMX for 30 years. can't do a lot of what I used to in my younger days but I still have fun

  • @aivarspriede5145
    @aivarspriede5145 5 місяців тому

    Well done. Sincere and clear

  • @turjake76
    @turjake76 5 місяців тому

    Thank you for sharing. Opens a lot.

  • @briscoedarling3237
    @briscoedarling3237 6 місяців тому

    Thank you sir for explaining this system!

  • @bartfart2123
    @bartfart2123 6 місяців тому +4

    that was awesome! thanks!

  • @spevakdesigns
    @spevakdesigns 5 місяців тому

    Could you do a video on stainless numbering? 300 series like 304, 316. And the hardening ones like 15-5 and 18-8.

  • @SonneFarms
    @SonneFarms 19 днів тому

    Very good thanks

  • @YTRocketMan
    @YTRocketMan 3 місяці тому

    Nice presentation.

  • @georgesheffield1580
    @georgesheffield1580 6 місяців тому +3

    US standards of generally available steels . There are many other special steels available around the world .

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому

      You are right! Perhaps I should do a series of videos on steel names and numbers?

  • @JeffSearust
    @JeffSearust 6 місяців тому +3

    Missed 3 common steels in my shop... A-36, 1144, and 12L14

    • @danielbackley9301
      @danielbackley9301 6 місяців тому +1

      12L14 ,12L15 the screw machinists' best friends

    • @andrewc9902
      @andrewc9902 6 місяців тому

      A36 steel usually references the specification ASTM A 36 it was purchased to , not the particular grade of steel however, it’s usually around 1020 1025 steel. That specification is driven by minimum mechanical properties not so much chemical limits, so the manufacturers have some flexibility as long as they meet mechanicals . It’s about the most entry-level steel one would purchase unless they wanted something softer like 1010 steel.

  • @MikiLund
    @MikiLund 3 місяці тому

    Thanks, have always wondered how it works.

  • @clayz1
    @clayz1 6 місяців тому +1

    that pretty well covers my needs. Thanks.

  • @neils2357
    @neils2357 6 місяців тому +1

    Dude, thank you for this!!!!

  • @maxfarr4142
    @maxfarr4142 6 місяців тому

    Awesome explanation. Thanks!! What's 12L14? Where does high machine ability steel and weldable steel com into the mix...?

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому

      12L14 is a low carbon, free-machining steel. The addition of lead aids in it's machinability. Machinable and weldable are terms to describe different properties of steel, and are used to describe different grades of steel, but are not part of a specification.

  • @m4rvinmartian
    @m4rvinmartian 6 місяців тому +1

    *6:15** XRF tester? I was thinking of getting one if they are reliable for testing alloys.*

  • @filster1934
    @filster1934 5 місяців тому +3

    I saw this video, and thought,"Oh, a toolmaker. Tool and die, progressive dies, plastic injection molds?" No, literally someone who makes hand-tools, which is cool. I've been in the precision tooling trade for 40 years, and S-7 is my favorite tool steel. Take it up to 58Rc, double draw, cryo treat and it'll last forever. 😃Terrible rust resistance, though.😐

  • @lancedoyle5026
    @lancedoyle5026 6 місяців тому

    interesting. Another quick method of alloy identification is to use a X-Ray Fluorescent Analyzer (XRF). A handheld unit can be purchased for ~$12k and will give you the grade in just a few seconds. Also handy for figuring out what the alloy is after any identifying marks have been removed.

    • @andrewc9902
      @andrewc9902 6 місяців тому

      @@lancedoyle5026 XRF can not detect carbon level, thus can not be used for plain carbon steels grading.

  • @mikesproject4704
    @mikesproject4704 2 місяці тому

    great explanation. thank you

  • @JimmyD806
    @JimmyD806 6 місяців тому +15

    You left out M tool steels. Usually called High Speed steel used as a cutting tool. Probably one of the most important tool steels out there. M2, M3, and M42 are common.
    As for 5160, it's spring steel very common in leaf springs (6150 in coil springs) and if you're into knife making, 5160 is a nice material for sword blades.
    Been involved in manufacturing and metals my whole life, although carbon steels are more on the rare side. We work mostly with steels like Alloy20, Incoloy800, CD4, Duplex 2205, H-loy C, 440C, Nitronic50, 316L, Ferralium 255, etc., although 9310 and 8620 are not uncommon for pivot pins.
    Bottom line, it's nice to see other people out there who work with their hands AND their minds to make things. 🙂

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому +3

      You are right, the M series is very important. I inadvertently left it out of my non-exhaustive list since I don't use it as much as some steel. Someone once gave me a piece of M50. What can you tell me about that one?

    • @JimmyD806
      @JimmyD806 6 місяців тому

      @@jasonlonontoolmaker
      Don't think I've ever worked with that steel.

    • @JimmyD806
      @JimmyD806 6 місяців тому +1

      ​@@jasonlonontoolmaker
      I looked it up. Looks like it's a bearing steel similar to 52100.

    • @CothranMike
      @CothranMike 6 місяців тому

      @@jasonlonontoolmaker that would be high carbon, high vanadium bearing and tooling steel used where fatigue strength is needed. Punches and dies in my experience are the usual uses but for a blacksmith the wear resistance, toughness and strength at high temps might make it a great hot tool candidate.

    • @campbellpaul
      @campbellpaul 6 місяців тому

      Would chrome-vanadium fall under a special type of tool steel?

  • @suryaprakashbellary8773
    @suryaprakashbellary8773 5 місяців тому

    Very clear and useful .

  • @RobWhittlestone
    @RobWhittlestone 6 місяців тому

    Very interesting. Is there a list somewhere of all the first digit steel type designations? Knife manufacturers sometimes indicate the steel used in particular knives, it would be interesting to be able to decifer these. Similarly, there is a a designation system for aluminium alloys. Is there also a deciphering table somewhere for that?

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому

      Here is a link to a list of the first digits of the AISI / SAE carbon and alloy steel system I talked about in the video. www.theprocesspiping.com/wp-content/uploads/2017/12/sae-aisi-table.png

  • @paripurnachari
    @paripurnachari 6 місяців тому +1

    Thanks for valuable information

  • @jeroendesterke9739
    @jeroendesterke9739 6 місяців тому +1

    I recall the old days of referring to mild steel as either St37, Fe37 or En1A.

  • @bob-the-Millwright
    @bob-the-Millwright 6 місяців тому

    Great information, great presentation the only thing I disagree with is 4140 being relatively inexpensive. The price of any type of steel is out of control.

  • @jsmyrick8066
    @jsmyrick8066 6 місяців тому +2

    Great! Thanks for the info.

  • @cosmasindico
    @cosmasindico 6 місяців тому

    Great explanation. Thanks!

  • @carolynbatta9525
    @carolynbatta9525 5 місяців тому +1

    Great Job!😊😊

  • @tonybye8293
    @tonybye8293 5 місяців тому

    Very informative. Thank you.

  • @andrewc9902
    @andrewc9902 6 місяців тому +2

    His use of the term ‘tenths ‘ for the determination of the carbon level is colloquially appropriate and correct.
    Except the high carbon Cr bearing steels all steels are under 1%of carbon content so by saying a steel is a tenth of A ( ie 1) percent he is saying it’s a 1/10 of 1 percent - which is how it’s understood. absolutely no one ever describes the carbon content in terms of hundreds of percent except maybe some chemistry professors. In some places it’s just referred to as ‘points’ such as 25 point steel. Ie 1025
    Another way to describe it would be to say 1025 steel is .25 wt% carbon

    • @dielaughing73
      @dielaughing73 5 місяців тому +1

      Sure, but if we're talking about, say, 1018 steel it doesn't have 18 tenths of a percent carbon. So for people without that specialised knowledge (which is still unclear to me from your explanation) it's ambiguous and confusing.

    • @andrewc9902
      @andrewc9902 5 місяців тому

      @@dielaughing73 think it’s just a quirk of English language how sometimes we say things that are imprecise especially when it comes to fractions of a percent, but the meaning is understood. A lot of steels are just the tenths ~ .2.3.4.5 . obviously in the machining world tenths hundreds thou 10 thou is critical but the chemistry callout terminology, for steel is more relaxed because people are not mixing up a batch of steel on the spot , but just eluding to standard stock such as 1018. I’ve never heard of anyone reference the carbon in hundredths but everyone is free to Ask their supplier to provide them with 2 tenths carbon steel and 8 hundredths carbon steel.

    • @dielaughing73
      @dielaughing73 5 місяців тому +1

      @@andrewc9902 hey, at least we're talking about decimals and not sixteenths or thirty-seconds

  • @robertharker
    @robertharker 6 місяців тому +1

    Great video!

  • @rm3141593
    @rm3141593 6 місяців тому

    Thanks for making the video, i liked it!

  • @jarekferenc1149
    @jarekferenc1149 5 місяців тому

    Interesting and consise presentation, thanks a lot. I'd like to go deeper into this. Are there any (official) tables / standards available that provide detailed information on chemical composition of the grades, based on these 4 digits? I mean that just a glance and some memory should be enough to see that this grade will be fine, and the other one won't work. Getting through the masses of datasheets with % range of each element is not what I need or like. Any hint, please? Or how to ask google to get the links quickly? Thanks in advance.

  • @TomHerd-vm4vf
    @TomHerd-vm4vf 6 місяців тому

    What steel would be used for a piston pin? I liked your presentation but adding some more real world examples would be a plus. I run into some old farm engines 1920~40's but I would expect the steel selected then would not change too much over time, or at least stay in the same group. . Note: working with old stuff I also run into cast iron.

  • @markpatterson7070
    @markpatterson7070 3 місяці тому

    Great video thank you !!!!!!!!

  • @emanruoy
    @emanruoy 3 місяці тому

    To figure out what steel I have I always look at the mill report, for example
    Farm Report; cloudy with a chance of rain
    Mill Report; Hot and noisy with a chance of being hotter and noisier

  • @rubenwarren2119
    @rubenwarren2119 5 місяців тому

    Great video!

  • @the_grand_tourer
    @the_grand_tourer 5 місяців тому

    Really useful, thanks ! I am however thinking of Bob Dylan's 'Subterranean Homesick Blues' for some reason.

  • @oswelds
    @oswelds 6 місяців тому

    Great information! Is this system used worldwide?

    • @jasonlonontoolmaker
      @jasonlonontoolmaker  6 місяців тому +1

      It is an American system that is also recognized abroad, but there are also other systems in Japan, the UK and other places. You can find conversion charts various places.