Delboy's Garage, Simple Skills, "Oil Quenching/Tempering steel"

[@garypreece7930]

Brill video Del n Penny.... my lad is into all this blade smith stuff and asked why they quench in oil rather than water?? so I showed him this video rather than explain....done the trick....thanks Gaz

[@MatthewEbel]

Thanks for the helpful tips, mate! This channel's become part of my "Saturday morning cartoons" ritual now… all the Moto videos I'm subscribed to from the past week.

[@DerbyshireBrian]

A cup of tea and the latest episode of Delboy's Garage, what a great way to start the day! ....now I want to get in the shed and look for some worn out screwdrivers! :)

[@philipgreen7383]

Great video. Brought back the sounds and smell of the metal work classroom I used in 1978. And we had a furnace, happy days. Cheers Dell.

[@Moonfleet41]

Happy days indeed buddy... id go back there tomorrow..!

[@bristol8920]

One of the best channel's on Y.T. with good explanations and camera work .......

[@philipgreen7383]

Great video. It brought back the sounds and smell of the metal work classroom I used in the late 70s. And we had a furnace. Happy days. Cheers Del.

[@springy-2112]

Well my little TV personality of the year , you are bloomin telepathic . Last evening I broke the end off a screwdriver and a Brad. (long story) and proceeded to file both back into tools again but I didn't harden them ...so will...they were both extremely brittle hence the snappage ... great info , sharing and caring , you can't top it... xxxxxxxxxxxxxxxxx

[@Moonfleet41]

Ayup Mr Bloke... thanks you... five minutes of fame, so now back to bizznizz... videos to make, and stuff to fix, you know how it is..!!! quench slowly with the hardening chap, to much cold shock and it'll go brittle..!

[@springy-2112]

Moonfleet41 great advice Db will do buddy it's a life time ago when I learnt all that and managed to forget half of it but your simple skills vids bring it back and make it make sense...thank you..xx

[@jonshaulis7531]

This helped me make a specialty tool from an old screwdriver (brake adjuster for a forklift). Thanks!

[@robbiegwinn]

cool stuff...been strengthening metal since the 70's...it works

[@mikeflies4830]

I'm a big fan of all your videos, brother. Keep it up!

[@richardfoulkes4589]

Once again a really informative video. I love delboys simple skills .keep em coming. Thank you thank you.

[@Moonfleet41]

Thanks Richard, you're very kind.. its just a bit of fun, and can even save you a few pennies..!!

[@domenic5136]

If I remember correctly, in school we were taught that only high carbon steel can be heat treated, carbon content of .8 to 1.1 % , tool steel such as A2, D2, 01, SPS and I'm sure there are others. Low carbon steel can be case hardened.

[@salimabderrahman9149]

Going to the shed right now to do some tool fixing.. great vid Del & Pen

[@Moonfleet41]

Thanks Salim.. Have fun.

[@rmulchi]

The garage is going G today 😁. Love it. Time to start playing with fire! Great video again, thanks D&P.

[@02bigkev]

well explained, I like the practical use for screwdrivers.

[@Moonfleet41]

I must admit, i do abuse mine a lot, but tools are for using and i guess you can always repair them aye..!

[@Niamhcotts]

Great tutorial delboy. I used to make my knives from old leaf springs and large circular saw blades same process.

[@Moonfleet41]

Hi mate, I think in the last few years, with the assistance of You Tube, thousands of people have started making blades for enjoyment !

[@brianking7838]

Hello Del, working on building sites l would very often pick up broken or worn out cross head screwdrivers that were thrown away by other tradesmen , and then turn them into flat blade, Saves a few pence!!

[@DukeDyson]

Another brilliant vid buddy, these are a great series. Catch you for chai in the morning :)

[@Moonfleet41]

Too bladdy right..! Sausage banjo too if i may venture..! ?

[@JustTex]

In my limited knowledge on the subject, i believe by heating the steel to critical point then quenching is hardening and tempering is when you heat the steel up again to a temperature below critical point for a certain period of time then allow to air cool . This will take a little hardness out which will make the steel less brittle . And if you really dive into Metallurgy you find out that some metal need to be quenched in oil others in water and others just air, which to me is interesting. The way explain stuff just makes sense. Good video sir . Cheers

[@Moonfleet41]

You are right Tex, there is "Hardening", and "Tempering", also you can use Borax to do "Case Hardening" which is a hard shell but softer below..... you can also quench in iced salt water.. and a lot depends on the metal you start with..... then once you get to grips with all that.. you can start on alloys.. Brass, Bronze, Copper, Tin, and on and on and on... its huge, and most kids today dont even know the first thing about it, and that's because the education system is tuned to turn out expert exam takers and get great test passes.. the more certificates they get, the better job.... shame aye!

[@JustTex]

interesting, never heard about case hardening. and yeah it is a shame but even when i went to school i feel that 90% of what they taught was not 'real world' skills.

[@edwardleniston1076]

Excellent video Del. Now we need a long over due FRO :-) Great to see you get well deserved recognition on the "Box".

[@Moonfleet41]

Thanks Edward, nothing to moan about these days... but im sure something will be along shortly..lol

[@paulb19691]

great video Del. you get a great sense of achievement bringing tools back from the dead. cant wait to try this on our cutlery lol. we need tough tools for my wifes dinners 😃😃😃

[@Moonfleet41]

My word buddy, you sail close to the wind don't ya?! I guess she's either away , or never reads your You Tube comments... cheers buddy!

[@paulb19691]

Moonfleet41 ha ha. yes she caught me laughing while typing that. sandwiches for tea for me tomorrow 😃

[@rayfiore7779]

Ingenuity is the root of 'Engineer'.

[@MackieBass]

Nice. I'm making a knife from an old tenon saw as we speak. Adding lots and lots of salt to the oil helps with tempering process too. i don't know why, but I've learn that trick from an old friend of mine, who was an "amateur" sword maker. Quick video on that may be coming when I finish the whole process...

[@Moonfleet41]

Hi buddy.. ill really look forward to that, i love anything about blade making.. have a little experiment with "Iced salt water" too... not for thick metal it it can crack it really easy... bit it turns mils steel wire into damn near spring wire...!

[@MackieBass]

Just need to remember when making a blade or an axe that heat-treating consists of two steps, hardening and tempering. In hardening, you heat the blade to a critical temperature and then quench it. This changes the structure of the steel so it's extremely hard but also pretty brittle. A knife in this stage, if dropped, can crack or shatter like glass. The next step, tempering, is done by heating the knife to a lower temperature, around four hundred degrees. This makes the knife less brittle, while still keeping a relative amount of strength.

[@DukeDyson]

It adds carbon to the steel buddy, shitty used engine oil is good for it too :)

[@stephenmitchell8324]

Hi del thats a Good Tip and you have a good Tip on the screwdriver now lol good vid

[@Moonfleet41]

Ha ha, thats the plan... i can use that for another few years now..

[@jaimielibbi1]

great appearance on TV by the way. now a patreon. look forward to more and more videos. ta Ian.

[@Moonfleet41]

Thank you so much Ian, we saw that this morning, That is really kind of you, and thank you so much for your long term support my friend, its very welcome... take care and keep in tyouch.. Del & Penny x

[@lilvinc180]

How did the oil not get on fire?

[@desoi]

Reminds me of oil quenching a bottle opener I had to make in metalwork when I was 12. I think the teacher called it oil blacking at the time...

[@Moonfleet41]

It had a few names, the most common was "Case hardening".. to make a hard skin on the outside but keep the item flexible so it didnt break...!

[@ja-no6fx]

To anyone who wants to actually apply this technique to something on their bike or some other project. Just be aware that tempered steel will also become brittle and will easily crack or break when force is applied to it.

[@Moonfleet41]

Hi John, it's slightly more complicated than that, for metal to become hard and brittle it has to be heated further than this, usually up to bright cherry red, about 1000 degrees, so as long as you keep it lower, you won't temper it... the whole matter of hardening and tempering metals is pretty complex, this practice has been done for a 1000yrs, since blacksmiths used it for preventing rust on tools.... also if you're worried it's got hard, then heat it again afterwards and let it cool naturally, and that will re-anneal it...

[@ja-no6fx]

I usually get my files to about 2000 degrees before i quench them after sharpening the end. I use it for scraping spatter off the area surrounding my welds. Ive noticed that sometimes the edge ive put on will break. Ive had a strong suspicion that i was heating it too much. Thanks for confirming this

[@Moonfleet41]

Hi buddy, 2000 degrees is more than double what you would use for carbon blacking, you literally only need about 800, which is barely glowing red... if you are getting a file up to 2000c, then you're almost melting it... as a little tip buddy, quench it slowly in warm oil, not cold water... that will make the cutting edge more durable.... and if it helps, you could watch a few videos from the knife making and blade making community, those guys really know how to make a durable sharp edge.... thanks for your feedback fellah !

[@daveharveys]

Remember doing this at school nearly 40 years ago, i think we also dipped blade in carbon powder to harden as well. Shame youngsters dont get the opportunity to learn metalwork in the same way we did with all the h&s bullshit.

[@Moonfleet41]

Yeah, thats the guilty party right there Dave, not so much the Health and Safety, that's always been there and we spent a lot of time learning that... but its the "blame and claim" culture, it scares the shit out of schools in case little johnny gets a burn or a splinter, and the greedy parents want thousands in compensation... so they just delete the subject.. that's exactly what happened in my school about three years after i left in '81.!.. and it's never going back unless parents sigh lengthy disclaimers etc etc... and can you ever see that..?

[@lucrebec727]

Haha first like and comment! beautiful stuff man! saw that you got on the television congrats to you guys you deserve it! much love!

[@Orenchis]

you got anymore details or links on that fella ?? Would be really cool to see that.

[@Orenchis]

hahaha never mind, i got it !

[@Moonfleet41]

Thanks buddy.. Enjoy.!

[@kevingambrell]

Hello Del, Sorry mate but your missing the most important point, Carbon content. Mild steel is not effected by heating and quenching. To harden mild steel you need to add carbon to the surface. This is called case hardening, and can be done using anything from suger to bone meal and many things in between. As an example of quench hardening steel, you could use Silver steel. Silver steel can be quenched in water at about 770 to 780 C and in oil from 800 to 810 C. Some of this is also size deendant. Once you have hardened the siver steel you tend to need to temper the steel. Tempering is reducing the hardness and making the silver steel less brittle. This is done by reheating the steel to set temperatures for set times and then again quenching. A few other steel can be quench hardened using the same kind of method, but certainly not straight mild steel. This is a typical analasis for silver steel; Carbon 1.00% Silicon 0.30% Chromium 0.40% Manganese 0.35% And this is for generic mild steel; Carbon 0.16-0.18% Silicon 0.40% max Manganese 0.70-0.90% Sulphur 0.040% Max Phosphorus 0.040% Max

[@jimbethpiggy]

yes hardening then tempering two separate processes done it a thousand times in engineering .

[@sandall1491]

If i remember my metallurgy classes correctly all metals on a microscopic level consist of what can be considerd as grains. The amount of grain boundry in contact with the grains surrounding it affects that particular piece of metals inherent properties. More boundry (large grain) = malleable and less "hard", less boundry (small grain) = brittle but "harder". Why is this relevant ? Because as you quite rightly point out metals/welds cooled very slowly will produce malleable metals and conversely the opposite for quickly cooled metals. Dull thing to point out i know, but keep up the hard work guys, brilliant entertainment as usual.

[@Panoschasanis]

MAN... U JUST AMAZING!!

[@suzuki750stu]

He he he, Delboy the mad scientist, bring back Tomorrow's World you could be a presenter on there, joking aside, another great and interesting video, regards Stu 👍🔧🔧

[@Moonfleet41]

Thanks Stu... i was thinking more "Wilf Lunn" from Vision-On......but you'll be too young to remember that...lol!

[@TheDct88]

what's the song playing when he is quenching the metal?

[@Moonfleet41]

Hi buddy, the track is called 'Loose Change' and is by Anonymous Musik, ft. Deeb... it's available to download online...

[@TheDct88]

Moonfleet41 thanks. I tried searching get the lyrics but came up empty

[@redsox7897]

can vegetable oil be used for this?

[@Moonfleet41]

Yes Eddie, Cooking oil will work, and if you warm it too, it can prevent cracking from the cold shock too..

[@leinerkolon7668]

hey body i like you video i tried everything you said and the file scrached the new quenched steel what am i doing wrong

[@Moonfleet41]

Hi Yes, a file can still make a mark, but was the steel harder, did the file slip over easier with less drag?... if so then you had some hardening effect at least.... maybe practice a bit more and get the heat dead right.. it needs to be cherry red, or about 800c before you quench it.. and if you quench it in cold oil, it works even better..

[@bigfatpear]

Great stuff !

[@andyblackburn2068]

Not as technical as my metallurgy lecturer with his infamous TTT diagrams, back in the late seventies . However a lot more interesting and certain better explained . When you "retire" there s a job out there lecturing college kids Good job

[@Moonfleet41]

Awesome prospect Andy.... "and for today's lesson lads... how-to hook up a Burnout"... maybe it;d be a short career...lol!

[@dazbec6199]

Great as usual del 👍 would love 2 see a simple skills video on how to get the oil slick look I think that's what it's called or jet fuel look

[@Moonfleet41]

Do you mean on your Hair?... thats what that usually refers to..?

[@melbenham3454]

good informative vid. I was told to use used engine oil, because it has a high carbon content. what is your feeling on this?

[@Moonfleet41]

Good call on that Mel, dark or black sump oil contains lots of carbon and will give you a really black finish.. of you want more of a bronze finish then use clean clear vegetable oil...

[@melbenham3454]

Thanks for the reply. You do some great videos. It's good to find some quality, British instructional vids, as most are American. Nothing against the Americans, but the info given doesn't always translate so well. Keep 'em coming. Cheers!

[@westkirbycampers4556]

Was that your rounded screwdriver for coin slots del?

[@Moonfleet41]

NO, just worn out from constant mild abuse buddy..

[@assatskatin]

Is that something that could be done to an old chisel or center punch, something that would take a blunt impact? I just grinded the center punch back to a point and left it alone..I've got some old chisels I'd like to clean up as well. Great one by the way, I never got any of this at school and I'm interested. 🙋🏼‍♂️

[@Moonfleet41]

you can sharpen a punch a few times as long as you dont get it too hot... but if its blunts first hit ..then its time to re-temper it..!!!

[@mattstala1184]

great tips as always Del. I have a request now, though, please can you show us that screwdriver again in 10 years, my thought is it's going to be about 2inches long :D

[@Moonfleet41]

Ha ha.. Deal... it wont take ten years though... maybe two..lol

[@DoggoWillink]

Technically you’re hardening it. Tempering it would be, after hardening, heating it to a much lower temperature to give it resilience back, while keeping a lot of hardness.

[@KingsColas]

*great video, very simple and very informative. Love these type of videos! (I'm curious tho. If I used really cold oil, and/or a bigger tub of oil, would the more oil/colder oil make it colder even faster? Would that help in any way?)* just thinking into it a bit. Cheers Del!

[@Moonfleet41]

yes, the greater the volume of oil the more heat exchange can take place and reach "cold" faster, specially if you wave it about in the oil to help cool it... but not too cold in temperature, that could crack the steel..!

[@KingsColas]

Moonfleet41 ahh I c.. So too cold is not a good idea. Lol. Glad I asked haha. Would there be any benefit of having the oil be a bit coder? Would the more rapid change in temp make the steel even Harder? Or would it basically be the same hardness..

[@Moonfleet41]

No, ambient temp is fine, but you can use some really dirty old engine sump oil, the blacker the better because that ads carbon and will help a lot..!

[@KingsColas]

Moonfleet41 - *That's what I kinda figured.. Never know till ya ask tho, right. lol..* / (I do have 1 more Question tho, lol sorry) - *I*'m very interested in this technique of using "Dirty Oil" to prevent rust is just mind blowing to me.. *Amazing.!* (I love the science behind stuff...) - *This is the most helpful video by far on the preventing of rust on Nuts, bolts. & Many other parts...* - In my Opinion (And I'm sure you would agree) *If your going to do it, You might as well do it the BEST way you can.* Especially when the job/process consists of the *Exact* same amount of *Time and Energy* to end up with a Much Better end results *Eh! lol.* / So if Im understand correctly.... *If someone "Only" had clean New oil, they Should be able to add a small amount of crushed/powdered Charcoal into the Clean Oil and still get the same result.?* (Using Charcoal from Either a Wood BurningStove or Charcoal from a Grill.) *"BUT NOT chimney soot, cause it's crazy flammable, lol...* - (Unless there's a difference in the carbon or something.) / *I Just watched the New Video you posted today.* That pretty Shat that you ran out of gas ehh.. but I suppose, it is what it is... Thats the time to just roll with the punches right buddy. *Also I wanted to say that The idea of what your doing is so creative, and the execution is even more impressing then could be imagined...* (Like with Most GREAT Art/Artists) - *You are an Artist Del, TRUELY!* - The end product will Absolutely and Undoubtedly be NO LESS than a completely Beautiful *"ONE OF A KIND", "1000+ HOUR"* CUSTOM *"Street Beast"..!!* - Entirely made from Individual pieces of Art all in themselves..! (Keepng the theme going by converting tanks was brilliant.! Although not intentional at first) *All while making sure that they ALL Mesh together to create ONE Amazing "Work of Art.!" Breathtaking!* - (What do you think about doing a Short *4K Video* in the future.?) *SORRRY for the long messages.* I'll hit your e-mail up from now on if you'd prefer. *Cheers Del (Dan)*

[@Moonfleet41]

Hi again Dan, sump oil is best, there's always gonna be sump oil, just drain some out of your car! And diesel engines are better, as there is more soot in it.... I have never used it as an additive to clean oil, so can't really comment... Thanks for your kind comments on the bike, it's coming along and happy with it so far.... cheers!

[@petefroud5308]

{p} Great information Del , well explained again . Great to see you on the Tv . Cheers Pete.

[@Moonfleet41]

Thanks Pete, it was an amazing day.!

[@petefroud5308]

All good stuff Del . Promotes bikers and the channal .

[@tinks43]

(P) Screwdriver came up a treat, Nice one!

[@filmcamera]

(p) Hi Del. Roughly how long did it take to heat up the metal to the right temperature before you quenched it?

[@Moonfleet41]

Hi Jon, with that regular blow torch, about 2 minutes..! but it wouldnt have got any hotter, the propane just doesnt lend enough heat to take it to white hot, no matter how long you hold it in the flame....!

[@leinerkolon7668]

thanks i will try get the steel hotter

[@howietorock]

yup you hardend your black snap on screw driver

[@alanhughson9853]

A nice bit of metalology explained their del sadly they don't teach these types of skills at schools now. I was lucky I done metalwork at school and we got sent to a local college once a week and we done metal work and learned how an engine worked all basic hands on things now they just stick kids in front of computers and it's sad we are losing these skills and if we are going to leave the EU we bloody well need to start investing into manufacturing that's down to the goverment unfortunately

[@Moonfleet41]

Alan, you are dead right buddy.. we do need to return our school curriculum to a bit more of a practical direction... we will need to be more self sufficient if we're gonna stand along in the future..!

[@chrisrag1346]

Hay, Haven't I seen you on TV ;)

[@Moonfleet41]

Ha ha... it was an imposter, it must have been coz he was way better lookin than me.!

[@chrisrag1346]

Moonfleet41 ha ha. Del has a doppelganger

[@gearjammer3688]

(p) Once again why don't schools teach this stuff? It would make a great chemestry lesson, let alone a metal work class. i guess it's up to me to show my boys. Still I get to look dead impressive.....or a charcoaled husk, depending on how it goes.

[@Moonfleet41]

Its more Physics than Chemistry, but first its "Metalwork" buddy.. and i was lucky enough to have this as a legitimate lesson at school, we had the whole afternoon every Friday in the workshop, and learned these kind of things in real practice, not theory on blackboards...our teacher was a retired Blacksmith and the same age as my Grandfather... id give anything to meet him again and thank him for the gifts he gave me... ! Pass it on for sure mate... they'll be telling people in 30 years how they learned it from their Dad, and THATS when you look dead cool.. these are the kinds of things they will remember you for when you are long gone... a legacy my friend, and no less.!

[@johnmccallum8487]

Great video 🔩🔩 now your a star in the big world 🌎 how much for your autograph 💷💷🏁🏁🏁🏁

[@Moonfleet41]

Ill have to learn to spell first...lol Thanks buddy.. business as usual again now.. five minutes of fame and all that.!

[@TheChipmunk2008]

Gotta disagree Del... OU programs were incredibly interesting ;)

[@baccas66]

Top tips, banging choon! Always entertaining. Class act.

[@Moonfleet41]

Thanks buddy... fun making these..!