Explosion Welding | How hard can it be?

Our first try on explosion welding! We try to weld copper to steel by using C4, will it work at all? Don't try this at home!

[@loddude5706]

'Mysterious copper plated seagull crashes onto parked Volvo in Finland, authorities remain baffled.'

[@stefanmeier6763]

:D

[@allangibson8494]

Mysterious copper plated seagull crashes into parked Volvo in Sweden authorities think it came from Finland...

[@loddude5706]

2.0 metre, 135kg. Finnish army clay-pigeon flinger & discus champion, awarded extended Copper Gull status for 'actions above & beyond her armpit'.

[@danielstuber8972]

instant bronzing! want to make those baby shoes last a lifetime? just throw them up in the air right before detonation!

[@grumblycurmudgeon]

Considering the depth of that crater, I suspect "copper-plated Volvo atop a chunk of Finland crashes into airborne seagull, authorities remain flattened" may be more apropos.

[@evilbetty9204]

"You start it we Finnish it." On a T-Shirt. You're welcome.

[@mitchzaleski8558]

I live in a Finnish community Kaleva is its name

[@datadavis]

@@mitchzaleski8558 do you make things go Pomm?

[@Basement-Science]

@Evil Betty make that a finnish flag.

[@bt70a9]

You ring, we bring.

[@josephmiller997]

That's a fantastic shirt. I'd buy that one.

[@CapeCodCNC]

The air gap was WAY to big. It should only be .5 - 3 times the thickness of the copper. It got so hot and gained so much speed it melted before it contacted the steel instead of fusing to the steel. Try 1mm copper with 1 mm gap........

[@gglovato]

i was going to say this, i remember watching a documentary years ago on a company doing this professionally on big plates and it was almost nonexistant gap, they put small spacers all over to keep the gap

[@frankbattista8962]

Exactly...1-4 mm typically

[@frankbattista8962]

...commercially it is typical to use a blast retardant to help control blast intensity as well...but nice first try☺

[@MichaelEhling]

I love that people know this type of stuff.

[@evilcanofdrpepper]

ANY IDEAS ON HOW TO MAKE A C4 POWERED POTATO GUN ALSO YOU GOTTA TRY TO MAKE ONE SHOOT AN ARROW LIKE JORGE SPRAVES ARROW GUNS??? Put a potato through steel, even if its super thin. Can someone calculate how much steel you can shoot fruits and veg through, and thenwe can work out how to make them go that fast and how big the thing has to be? what about a ton of small booms in separate tanks plumbed together? if you get 4mm outer diameter metal pipe also get some 4mm inner dimension pipe and put it on the outside and repeat, maybe filling the space with whatever the people here recommend! Also is putting pvc on the inside as a sacrificial pipe to reduce friction and the load on the steel pipe a good idea or just a waste of money? maybe use metal fins to shape the wave in the tank? Please tell me experts! I was thinking an old propane tank with a port and barrel added with the marble of C4 hung floating in the center of the tank? There are likely better shapes and ways to taper the cylinder down to the barrel size but the concave ends are not bad. an alternative idea is get the biggest steel pipe you can and wrap it in rubber then pour cement around it and box that up. What say you thinkers with brains that know this stuff? is 2/3rds down the tank length better? I have a comment with more of this. Also looking for cartoon shticks they can do with sticks of dynamite like dynamite in gun barrel makes it peel open like a banana? test then try to recreate the cartoon result.

[@Strigulino]

“You can weld almost anything to almost anything with explosives”. So many household uses! 😆

[@Tekdruid]

"You know, for welding."

[@datadavis]

Know i know why the finnish guys at work are so good at welding

[@musicjunky1605]

Household friendly too!

[@scanor]

@@musicjunky1605 yea.. as long as you don't set the damn thing off in the household.. then you won't have a household :P

[@thomasa5619]

I’m going to try to weld myself onto things!

[@Rubensgardens.Skogsmuseum]

Customer: Can you exposion weld? Lauri: Kyllä. Later: Delivers something that looks like it has passed earths atmosphere at 30km/s.

[@PPYTAO]

Henke got so used to TNT, you can see how happy he is to FEEL an explosion again!

[@shagaroohagaroo5416]

Henkka

[@PPYTAO]

SHAGAROO HAGAROO thank you 🙏 I couldn’t see the correct spelling 🤗

[@shagaroohagaroo5416]

@@PPYTAO no problem

[@zabnat]

You probably meant to say dynamite, which is what they usually use. But I agree with your comment.

[@earlcoles5215]

@@zabnat yes, TNT and dynamite are 2 different chemicals

[@d.jensen5153]

Absolutely fabulous! Would love to see more explosive welding. Would also love to see more shaped charges using semtex...different liner materials, different geometries, different targets.

[@shacklesburst]

Definitely try again, this was really interesting (especially the discussion afterwards with the zoomed in pictures). I think it would be even more interesting to take away more of the material and provide us with shots of the cross section where copper and steel meet and whether you got that to be fairly straight.

[@Taylor88Productions]

Explosives and metal dangerous? I wasn't aware. 🤣. Love this channel!

[@ZycemniTheSane]

Am I alone just thinking how beautiful that looks? Never mind how good it welded or how much copper stayed. That metal looked really good.

[@jetsi6821]

Watch the pommijätkät channel there are big explosions fking beatifull

[@f.d.6667]

My thinking exactly! Whole generations of potters in Japan were trying to achieve THIS look for the perfect matcha bowl... there is also a dimension of "kintsugi" as the erosion from the liquified copper is resembling the gold of the original kintsukuroi...

[@Codebreakerblue]

Who knew that literal blast waves could look so cool

[@Christopher.C123]

Anni, Lauri, Hank. You three make a fine pair if ever I saw one. Total nut cases and very entertaining content .

[@RamadaArtist]

6:02 This is my favorite part. "Did it look like this in the other videos?" "Not in the slightest."

[@pirobot668beta]

US layered coins, like the dime and quarter, get their metals fused by this process. Large slabs get welded, then they are rolled into thin sheets. ... There is an artist in Arizona(?) who uses Deta-sheet, flowers and sheet metal to make art. Deta-sheet is essentially det-cord in sheet form. Usually about 2-3 mm thick, PETN and a binder. The metal is decorated with flowers and leaves, a sheet of high explosive laid on top. When detonated, the bits of plant disturb the shock-wave, leaving a floral pattern blasted into the metal.

[@user255]

Link to the work of the artist?

[@essr4580]

Yeah I wanna see this, sounds awesome

[@Tobascodagama]

@@user255 I found a Scientific American article that possibly refers to the same artist, but in typical academic journal fashion the "sample" only has like one sentence visible. Here's the JSTOR link if anyone has the ability to track down the relevant SciAm issue: www.jstor.org/stable/24987131

[@IanGrams]

@@Tobascodagama I have alumni jstor access thankfully. Here's the link to the artist mentioned there's site: evelynrosenberg.com/artist.php?p=9 Seriously stunning stuff. Pillars of Knowledge might be my favorite. Haven't seen any with plants used for the relief like originally mentioned but I suspect it's the artist they were thinking of.

[@coldhotpocket8226]

Sounds like a fun as hell way to make art lmao

[@hippiewrathchildz]

Watched a documentary about this process of welding and they had no gap and used Anfo instead of C4. Would love to see you try this again.

[@Sludge73]

Hell yes a part 2 is needed. Great videos.

[@davidwootton683]

Thankyou for all the trouble you went to, to make this video for us. Most interesting! Yes please can you do this for us again. Kind regards, and greetings from Africa.

[@Monni95]

The explosion videos are the best... Never go completely as planned...

[@tootired76]

Laurie's t shirt says it all! "Professional Finn"!!!

[@scottharter1161]

Id really like to see more explosion welding - I had no idea it was (or even could) be a serious construction process.

[@WineScrounger]

It’s used to crimp high tension cable joints, the impact causes the joint to weld.

[@lairdcummings9092]

US clad coinage is stamped from explosively-formed bi-metalic sheets.

[@lairdcummings9092]

kzbin.info/www/bejne/jn62kotjaNmCi9k

[@datadavis]

@@lairdcummings9092 what happens to all the scrap metal from the stamping process?

[@lairdcummings9092]

@@datadavis to be honest, I don't know. Never really thought about it.

[@gobbel2000]

This is really interesting, also a great way to combine machining and explosives. I hope to see more of this.

[@Kenionatus]

"Was afraid we didn't use enough explosive." Later: "Maybe the steel boiled or something."

[@norbertfleck812]

The steel was completely smashed and torn Into pieces. I guess this was an excessive amount of C4.

[@ve2vfd]

Looks better than most of my welding ;)

[@raysplace6548]

I definitely felt that..😂😂🍻🍻

[@WoodworkerDon]

"Like someone vomited the copper." Quote of the year.

[@1DShoe]

I'd really love to see the weld planed down, or machined down evenly - just to the point where it's level - to see what it looks like. it might just be something cool that you could keep as like an art piece or something.

[@nelsonbergman7706]

Moi. As always I love sounds in slow motion and I love Anni's laugh. Thanks Moi Moi

[@wushock97]

Thanks for doing an English version of your channels. Your group of people in your videos would fit in with the “southerners” here in the United States where I live. Some of the videos you create are interesting, why others are funny. Keep up the good work and great content! I’ve told some of my friends, “You won’t believe what these people (you) tried to do.”

[@hoperp1951]

I had samples of Titanium with Copper in my work, explosively clad together way back in the early 80's. They had been made by Nobel in Scotland from what I recall. It was possible to see the tiny wave formation at the interface of the two metals. The Titanium plate was about 25mm thick, the Copper about 5mm thick. I think the secret is near clinical cleanliness of the material surfaces and highly controlled explosion to ensure a single moving wave front between the surfaces. Well done, perhaps another attempt in much cleaner conditions and slightly thicker Copper plate .

[@guffaw1711]

I think most of the copper evaporated. Thicker copper plate and less explosives next time, and no sand around. Really hope you try this again! Also I love these explosion videos where you don't destroy something but create something new!

[@陳冠維-f7i]

If you didn't say it is a copper plate. I was thinking about: how are you going to explosion weld a chunk of steel to a pan cake?

[@homefront3162]

me too

[@bertbergers9171]

Truck Unbreaker i am sure enough explosies would be probably a lot less ;)

[@PeterOekvist]

Looks like a burnt cake😂 How about sawing it in half so you can see the cross cut?

[@Xeridanus]

The copper is so thin it would just look like steel all the way through, I think.

[@PeterOekvist]

@@Xeridanus just curious on how the surfaces look between the layers.

[@Xeridanus]

@@PeterOekvist that's what I'm saying though, probably so thin you couldn't see it well. But I don't know. I think he said it was thicker in some parts.

[@PeterOekvist]

@@Xeridanus so let's find out...

[@AdricM]

saw it at an angle and you might see something.

[@jroemling]

What I remember from Mythbusters is that Amfo is a slow explosive, maybe that is something that is desired in the industrial process?

[@CJ-hw4zc]

Actually, you have a good point.

[@elmerdeleeuw1569]

ANFO is like a pilot boat, C-4 is like Doomguy. The first pushes, the second rips & tears.

[@darknase]

ANFO or AN/FO for ammonium nitrate/fuel oil Also there is patent [1] from DuPont for EXW therein they talk about detonation velocity of 1200 - 5500 m/s. ANFO is said to have "measuring 3,200 m/s in 130 mm (5 in) diameter, unconfined, at ambient temperature" while here [2] it's given wirth 4200 m/s in the same table C-4 being based on RDX has 8650 m/s. [1] www.freepatentsonline.com/3137937.html [2] en.wikipedia.org/wiki/Table_of_explosive_detonation_velocities

[@johnalexander2349]

I remember reading somewhere that the explosion front actually pushes impurities out of the metal to metal interface as it propagates. I guess slower works better for that.

[@BixbyConsequence]

Or just use a much more massive piece of Copper.

[@caseymacdonald878]

This is such a cool video, and explains why it's so hard to clean the copper and steel off of my shooting target, keep it up obviously the hydraulic press was just the beginning!

[@Issac_The_Last_N7]

This is amazing! I love how loud C4 is

[@johnbrady7431]

Yeah, it would be awesome to see it done with a slower explosive like anfo! That C4 was probably close to how an antiarmor round would react. Melting through the steel, instead of fusing to it.

[@michiganengineer8621]

From what I've read that's how some anti-armor rounds actually work. A small disc of copper in front of a shaped charge with a proximity detonator. The explosion of the charge essentially forms the copper into a small, super fast and super hot DART that penetrates the armor and then ricochets around shredding everything (and everyone) inside.

[@wayne1959]

yes we need more explosive welding until we see an a class result. love your work guys.

[@scratchdog2216]

Munroe effect aside, I was laughing right along. Great fun had by all. Thanx for the show.

[@icuabc1235]

I found out that if you are in Finland and you hear oopsie, don't wait around to hear daisy.

[@goneweldin8181]

Love the States shirt he’s wearing! Keep up the good content its some of the most interesting stuff i watch, I’m currently in school for welding tech so this was super cool.

[@theonlybuzz1969]

With seeing explosive welding carried out in the past and knowing what is involved etc, looking at your version of the process, the copper wasn’t thick enough and the explosive used wasn’t c4 or dynamite but the one typically used in mining as it’s levelled really precisely and like the world and it’s wife also said air gap too big, the other differences are that the people doing this properly have done it in a mineshaft for containment of material and the noise too.... I enjoyed the show thanks 🙏

[@towoperations]

"stuff is still going to happen, because we're using C4" best line of the year. Around 3 minutes.

[@craignapoli]

I love your videos, I always learn something and i always laugh a lot, i can't thank you enough.

[@thomas4844]

That was a great explanation of C4

[@sakaspuds]

this is the content i want, i love this channel

[@robertreynolds9228]

Very cool looks like contamination from surrounding materials. Shaping the detonation would probably give more uniformity.

[@CJ-hw4zc]

Dear Beyond the Press: awesome videos! I love anything having to do with the science of energetic materials! I think you should try this one again, but using an explosive with a slower VOD. I think c4 is too fast, and it ends up splattering the copper instead of keeping it together in one piece. Try Dynamite, or even ANFO. There should be an optimal VOD that keeps the copper in one piece, yet still slams them together with enough force to weld.

[@johnrehwinkel7241]

Metal sheets with up to five layers were made with explosive welding techniques like this for vacuum tube plates back in the day. This is one of the reasons vintage vacuum tubes perform differently from modern production units.

[@Zeinzu2]

YES. Please do this again. Lets have a series of tries until there is a proper welding of the 2!

[@kenirwin276]

The explosive welding I have seen was making copper clad steel. The used a large slab of steel and placed copper sheet on top using seperator pieces to hold them apart about one centimeter. They initiated the explosion from one corner so it traveled across the piece. I'm pretty sure they didn't use C-4 as it has a burning rate much too fast.

[@bob2859]

I'd love to see comparisons between different explosion energies... bonus points if they are detonated sequentially!

[@hygri]

Vote for Anfo! Would like to see the whole plate milled perfectly flat, it would be beautiful

[@mjproebstle]

fun video! would like to see a second try, and this time please show how the explosives were packed around the two metals. cheers!!

[@kasnitch]

I used to be a hard rock miner here in Ontario . Loved blasting rock into small rock using various explosives and techniques. There used to be a CIL product called Power Packs . It was a nitro based explosive that came in a plastic sleeve and weighed about 1 lb . However, I found it to be very effective on large oversize rocks if I cut open the package and shaped the explosive inside very similar to a chocolate drop and placed a blasting cap into the tip of the charge . This explosive felt very much like modelling clay .. very nice and formable . After the shot , there was nothing left of the large rock, just shattered into much smaller pieces . Sure beat hell out of carrying a jack leg over the rock pile and having to drill a shot hole into oversize . Bloody hard work that .

[@williammorton8555]

"You can weld anything to anything with explosives." I want that tee shirt!

[@Prostaneverayatno]

Brilliant video, please do more very interesting result. For small home applications would very cool. (Of course done safely)

[@Babarudra]

Very cool. I hope your vacation is going well. Although you're probably working on moving, so not much of a vacation.

[@That_Random_Schmoe]

In a different life, I worked for a company called Explosive Fabricators. It for sure works, it's a cheaper way to line large steel tanks with titanium.

[@gafrers]

Awesome. Hope to see more and with different metals and semi-metals if possible

[@stevebuncic9362]

What you presented was the effects of a " shaped charge " explosion. Two explosive materials are set inside a projectile the first being like your demonstration , a contact explosion of molten copper hitting the target with then the main explosion after the target has been melted.

[@forrestaddy9644]

I've machined miles of aluminum plate explosively bonded to steel to make faying strips for welding an aluminum deckhouse to a steel deck on a ship. The paperwork that came with it described the process fully. Ir was 40 years ago but I recall it well. The steel plate to be bonded was placed flat on a 14" thick "inertia block" (can't recall the official name) made from a salvaged chunk of battle ship armor plate. There was some form of barrier between the plate to be explosively bonded and the anvil block so the two wouldn't bond. I think it was a couple layers of plain paper. Both the steel plate to be bonded and the aluminum were freshly sandblasted to white metal. They were spaced about a millimeter apart with bits of aluminum wire scattered randomly and sparsely. This spacing was critical. The closing velocity if too low wouldn't bond: if too high the softer metal would squirt out like mayonnaise. They controlled the closing velocity by controlling the spacing. The explosive (I think it was AMFO, a white powder, anyway) was spread on top with a screed to a specific thickness. The explosion was initiated by a booster strip and a cap array to start what was called a "linear wave" the full width of the plate. The steel was roughly 20mm thick and the aluminum 15mm. The bond was very difficult to machine through to make strips. We used regular lathe parting tools in a planer. The interface undulated something like ocean waves and the crests were very hard. They'd catch and break the parting blade once or twice per part no matter how careful we were. The bonded plates came in 4 ft x 12 ft (1.2 x 3.6 meters) pieces which we parted into 25mm strips the length of the plate. It was mostly an easy job until we hit the interface: that was a nightmare. Here's a link to Pacero Products, the successor to Northwest Technical Services who supplied the material to us in the late '70's: pacaero.com/products/explosive-bonded-metals/explosive-metal-welding-technical-overview/ Google has pages of offerings using "explosive welding" as a search term.

[@dukesaunders680]

Thank you for this. More please!

[@ThompaThelin]

proffesional Finn !! love it !! ha ha ah ! As a swede from Gothenburg I love the Finnish people , suomalaiset :) (except when the beat us in icehockey)

[@davidchristensen2970]

We most definitely need more like this.

[@prinzeugenvansovoyen732]

Amazing video, you need to smoothen the upper side of the explosives more even and reduce the distance from steel to copper to abaut 1cm Can you try shaped charge versus big rock - i allways wondered why shaped charges are not used in underground mining since they are pretty precise and fast to set up

[@demoman]

You only need a flat layer (sheet) of explosives on top. No standoff needed. Explosive cladding/welding is easily achievable with smaller amounts as well. Although you dont get a huge explosion, it wont deform the material as much. Next time, place a small copper sheet on there with a coin in between and it will make an impression of the coin in the steel with stunning detail.

[@Knoxtx129]

You seem like you were having a "blast!"

[@WoodworkerDon]

The Macro zoom in starting at 10:00 is really interesting. Prrrriiiitti Guud extreme close-up photography.

[@HydraulicPressChannel]

Thats 100mpix photo from Samsung S20, works pretty well for a phone on this kind of stuff

[@juhonikula6408]

@@HydraulicPressChannel "Hups väärä käyttäjä"

[@StarScapesOG]

The professional blast welds are done with a powder high explosive that is spread evenly across the top material in side a form. The explosion is started from one corner. I am not sure what explosive is used though.

[@sunshinesoulev]

Very cool!! I would have loved to have gotten a piece of this to cross section this in my lab and get a really good idea what the copper penetration into the steel looked like.

[@jiminycricket2230]

Its hard to believe this is common place but it is. I've wielded clad steel that was used in mining operations. Wite iron to mild steel for use in stone crushing operations. Great experiment though. I really like it. Id like it if you did some more for sure. 👍

[@Only1Shadow]

Most explosive welding is done using low speed explosives like ANFO with 10-15mm gap between plates, and ignited from a corner so the compression wave propitiates evenly across the sheet. More precise welding with less damage to the finished product.

[@ericm8811]

Hey beyond the press channel! Yes please more explosion welding! Use a thicker copper sheet! Ride ride ride!

[@julian9579]

the closeup of the cut looked suprisingly amazing 😂😂

[@rezdm]

Looks interesting. Can you do friction welding in your shop? Various materials pairs. Will be interesting to look at. Cheers.

[@miltonceliz1717]

Great video !! Greetingas from Argentina

[@ianhowick]

"Professionally Explosion Welded Parts" Something about this phrase excites and terrifies me at the same time.

[@elainetreadwell5576]

I would like to see it done again. Thank you very much.

[@maverickmeteor]

"Don't try this at home". Phew, thanks. I was just about to order 50 kilos of C4 on Amazon. Lol! Great video!

[@jaremarandall4386]

When i did this proces as part of lectures on Uni I used much slower explosives, like ANFO. And for explosive welding two plates 12mm thick each best distance was thickness of safety match. IF i remmember properly i used around 200g for each 250 square cm.

[@WyattFamilyonUTUBE]

In college (almost 30 years ago) I had to write a paper on explosive metal working. It's cool to see it happen (no KZbin 30 years ago 🤔). Explosives were used to form Saturn rocket nosecones. Maybe you could try some underwater forming with explosives.

[@cocospops9351]

Constantly impressed by your English language, its very good. Do you learn it in school there?

[@ianlevine273]

Great video. I would love to see it again with a lower velocity explosive like anfo or dynamite. It seems like c4 was to far down the progression from pushing into ripping and shredding.

[@johnthomas5166]

I've probably watched all the HPC & SOX videos and haven't seen the ultimate movie fireball yet. How about a dynamite lift charge sending a gasoline bladder to the stratosphere. Have a road flare set on top like a big dangerous Birthday candle. Love your stuff

[@Meevious]

That frame at 4:00 shows the magic very well!

[@WoodworkerDon]

Explosive Welding is so riveting to watch. :) (I'll show myself out now.)

[@PeterOekvist]

Your atempt to bond with your audience is poor...

[@RikkiTikkiTavi290]

@@PeterOekvist No need to fly to pieces

[@PeterOekvist]

@@RikkiTikkiTavi290 No, i'll keep it together.

[@jackfrost2146]

I thought it was a blast....

[@jjohnston94]

Yes, try ANFO, with a thicker piece of copper, a smaller gap, and cleaner surfaces. Also, based on the other videos on KZbin, use little pieces of copper as spacers, so you don't have to perch the copper on the sticks.

[@zerg9523]

Okay... Some suggestions with physics in mind. - Do not raise the copper _”source”_ above the steel _”target”_ . Place them in direct contact with each other... Having the source and target apart allows for deformation of the source way before the weld can ever occur at the target... That is why shape charges in things like RPGs detonate at a small distance, so the cone shaped copper has time to deform and form a jet before impacting the target. - Do not initiate the detonation from the centre. Initiate the detonation from an edge or corner... Initiating from the centre would cause energy to focus unevenly and will likely cause greater overall deformation... Allowing the detonation wave to progress from one side to the other reduces and evens out the overall focus of energy. - It would likely give the most even and repeatable results if you used a powder explosive. Again placed in contact with the source and target, still detonated from an edge or corner. - If you can use a powder explosive, slowly increase the depth of explosive powder completely covering the source so you can achieve the weld with minimal explosive compound and the least collateral damage. - If you are stuck with solid explosives (what a shame, lol) try to lie it as flat and evenly on top of the source and target, initiating the detonation from an edge or corner. Great work guys, keep it up with the crushing and blasting.

[@zerg9523]

... continued ... - As a curious side question. I am not entirely sure at these sort of energies if having machined flat and clean surfaces would make a significant difference to the results. - It would be interesting once you have a repeatable experiment going, to test the differences in very well prepared material faces and equally rough material faces. Sorry for the overload, such a good home-brew experiment, I couldn’t help it.

[@caryfuk8]

Hi, do you hear of SEMTEX? Its plastic explosive like C4 but i hear, its 4x more eficient ;) Its from our country Czechoslovakia

[@nonoDIY]

Yes it would be interesting to see more of explosive welding.

[@nelsonbergman7706]

Also similar but different. Many railroads weld their rails with thermite. Maybe something to try some day.

[@zachyoung5598]

Use low VOD explosive, a smaller air gap and inert buffer between explosive and flyer plate. You can also use the inclined method to achieve uniform impact angle.

[@adamkilroe9840]

Wondering if you could do laminations of copper and steel, and whether using a thicker piece of copper make have worked better.

[@modraccin9514]

I'd love to see blast wave visualized with a smoke column beneath the explosion next time.

[@Locane256]

I want to see the metal puck cleaned up - like the edges all smoothed out and bright and shiny - I want to see the mottled copper more clearly over the whole surface!

[@ResistantStillness]

I don't have anything to add about explosion welding but a Beyond the Press video attempting friction welding would be cool.

[@harleyquinn8011]

Komeat slaavikyykyt molemmilla ensimmäiset 3 minuuttia 👍😝 Nice Slav crouches both of the guys within the first 3 minutes!

[@TheAruruu]

C-4 is classified as a "High Explosive" because of its extremely high 'burn' speed. Speed is good for cutting and destroying. ANFO is classified as a "Low Explosive" because when it detonates, it pushes instead of punching. That's why it's used for explosive welding. Example: How far can you make someone (or something) move by punching them (or it) as compared to placing your hand on them (or it) and pushing. Side note: ANFO needs a minimum amount to detonate, and that minimum is significant. A test of this scale may not work if you try it with ANFO.

[@Glyxis.]

@Beyond the press Actually there is a reason why you should would use ANFO as an explosive in this kind of stuff. ANFO is known for that it is very "slow" explosive and it's shock wave is much more "gentler" and "pushing" so it moves objects way better, meanwhile other explosive's shock waves are too fast and they are just ripping and destroying everything in it's way.

[@PyroX792]

Late comment but yeah I would love to see another go at this!

[@___10000]

Loving this explosion welding. Great job. What are your shorts in the workshop? Orange

[@DoctorZSwarner]

Could you try sand blasting with super fine grit to polish the coper where you milled? I think it'll look really cool, steel with copper craters