Forging a Copper Damascus Katana

For those asking: 1) This one is already sold. I do not do custom orders because this is just a hobby and I only sell what I make or the channel. I have some knives available on my website, check those out (link in every video description). 2) Yes I'm aware that the curve in a traditional katana is from the heat treating process. I chose to not differentially heat treat this blade because it is damascus-cladded. If you apply clay and get a hamon, the steel above the hamon will be soft and the damascus will look terrible. The copper takes the place of the hamon aesthetically and also provides shock absorption. 3) The copper bond is very strong. The copper in the blade is a thin sheet over the central core of high carbon steel which is also the cutting edge. The copper brazing bond is in excess of 70000 psi in tensile strength and you'll destroy the blade before you shear the layers apart. 4) Galvanic corrosion requires the presence of an electrolyte (like saltwater). Keep the blade clean and dry and oil it on occasion like you should with any carbon steel blade and it will last a lifetime. Basically if you keep the steel from rusting, the copper will be just fine. Thx.

This dude is a welder, carpenter, fabricator, painter, engraver, all on a master level. Pretty cool.

Probably the most gorgeous piece I've seen in a long time. Absolutely phenomenal.

This dude doesn't just make swords and knives. He creates art. Absolutely stunning art. If somebody stabbed me with this sword i would apologize for getting it dirty.

This is easily the most gorgeous “Dark and Edgy” sword I have ever seen. The marbling of the Damascus is sensational. The detail work on the handle and guard are beautifully executed. Props to you! 11.5/10 on this one!

This blade looks like it could be a blade of legend. Seeing the finished reveal left my jaw down and speechless. Truly beautiful piece.

I am Japanese and have the opportunity to see swords on a daily basis and I must say your swords are beautiful.

Man... the samurais would literally kill for this sword! Gorgeous piece!!!!

the final result on the blade gave me chills, it looks beautiful.

Aside from wanting to say this is an absolutely gorgeous piece, I wanted to comment on the graphics you added to represent the billet during the initial forging process. That was actually very informative and helpful, and I haven't seen that on other channels.

素人で全然わかりませんがかっこいい刀ですね！分析的で専門的な素晴らしいチャンネルです。 それと同様に機械も定規も無しに刀を作る日本の職人さんは凄いんだなって思いました、すべての職人さんに敬意を。

What an astonishing array of skills. It seems like a lifetime wouldn’t be enough to acquire them all. Beautiful!

This is more than a sword. This is art

I'm a software developer, somehow YouTube suggested this video to me and I ended up fully watching it .. The passion and hard work you're putting into this is amazing, the beautiful result totally reflects that. You have my respect.

wow what astonishing idea to make the Hammon with copper never saw something like that!! WOW You are truly a master at your work. One thing i learned in kitchen, when you put water in hot oil it'll explode and make the vapors oil flammable, so when you quench and you using oil, in my personal opinion you don't want to blow in the oil cause you'll make more flammable adding water to the oil. Your works should be exposed in a museum !!

This is probably the most beautiful sword I've ever seen.

I just want to say that the visual representation of how the pattern was formed is genius, and is great for helping the viewer keep track of the pattern.

Man the colour, the contrast, its just so gorgeous, the process is even more satisfying and informative. you just got yourself a lifetime subscriber

This video was posted almost a year ago and he still replies to comments. This guy clearly loves what he does. Beautiful piece man.

Usually i dont like Damascus but this is insanely beautiful i love how much contrast there is