Cuirass forging. The shotgun didn't break it! 

Probably the same amount of time or even less as they were a business and had many workers/apprentices. Armor-making shops were usually by a river and had water wheels to power mechanical presses and hammers as seen in this video. In another video, it is shown how eight metal buckets are mass-produced together by stacking eight sheets of metal in a high-powered press. Mercenary-grade helmets and breastplates could have been mass-produced with such techniques.

(parries it several times)

I mean if your opponent happens to be using birdshot then yeah

*Insert free bird song*

​​​@@mysteriousstranger5873 Have you seen the full video in Ukrainian? They were all heavy buckshot and slugs.

It has the characteristics of a munition cuirass, italian export manufacture of the milanese style, second half of the 15th century, circa 1450-1480. Normally they use a leather strap to join the placard to the breastplate on the chest, but on munition grade cuirass and italian cuirass made in the german style it's riveted, it provide less mobility, but is a stronger, quicker and cheaper option. On more high end cuirass the edge arround the armpit and the neck would be rolled over to form for example a triangular ridge, not just raised as it is, and there would be more decorations. It is a purely fonctional armor without anything fancy added to keep the manufacure time and the price down. It's the kind of cuirass a medium income member of a city militia or a men at arms of the retinue of a knight might use during the end of the hundred years war or during the war of the roses. In short, it's for Guys rich enough to buy (or lucky enough to recieve from thier lord) plate armor sold by a merchant but not so much as to get thier hands on bespoke, made to mesurement harness from an armorsmith. During the last half of the 15th, he munition cuirass is a basic upgrade to the kit a soldier with means would get himself after a helmet, a jack, and a shirt of mail. (In that order, dictated by essential need for protection and price, note that newly made mail was more expensive than plate during the 15th century, but scince mail was in constant use by knights and soldiers during the middle age there were lots of hand me down and second hand mail shirt on the market for a lower price). An alternative would be a brigandine, but thier qualities were not constant, as they were usually made from recycled plates of armor cut to shape. Plus they protect less than plate against polearms blunt trauma, and even against longbow arrows if the metal used is not tempered. Italian munition armors were mass produced on an quasi-industrial scale and exported thus a less costly option and quicker to make and deliver to the client, but still of excellent quality, most beeing made with tempered steel by that time. Think of it as the medieval equivalent of "the best bang for your bucks". Richard III himself ordered quite a few sets of complete milanese export armors to arm his knights.

I just wonder if it can even be representative of period armors given the difference between modern steels and historical ones, and that they've likely used a modern alloy. Plus don't forget that tempering won't be as precise in comparison to this one.

@@jonajo9757 "Modern steel" includes mild steel - basically, steel witch is just iron and carbon, with no other alloy, and with a reasonably low carbon content. It is the steel most commonly used by modern armorsmiths, because it is actually quite a good aproximation of medieval steels (and of or wrought iron). So nope, the armor being impervious to arrows is not because of "cheaty modern materials". It's because armor was (surprise!) good at protecting the wearer. If you expected it to be penetrated by arrows as it it was ade of wet cardboard, it's because you have read too much British archer propaganda ;-)

​@@notfeedynotlazy Yeah you right. Also I forging check, but the steel he's working with is 3mm through out which is more than enough to withstand whatever he tested the armor against.

2mm thick enough

@@CaptainPeenNoPants No, I want 5 ! Like Newton said "I like them thicc af"

I think is 2 mm

@@lassetercarlon It says 3mm in the description. Also it's probably 30HGSA, that's what he uses for a lot of his other projects

If that's 3mm thick 1030 steel, an oil quench won't give you complete transformation

probably slug

1 ounce slug

Yeah, but a lot of modern reproduction armor is on the thicker side for safety reasons, since most people will either be using it for a tournament or just walking around at a Ren fair or similar (where the extra weight would matter less) with it on.

It hardens the metal, although water is a lot more harsh, water makes the steel very brittle, oil is a lot more lax. So oil is the best way. I'm not sure if that's what he uses or not. But steel only can become hard in oil or water if it has carbon in the steel.

Quenching from the tempering temperature prevents temper embrittlement in steels which are prone to it - some low alloy, carbon steels can become embrittled from tempering because of the slow segregation of impurities to grain boundaries after the tempering cycle allows them mobility. A water quench prevents this.

@@judahmills1731 I don't think the poster was asking about quench hardening. They were asking why the tempered breastplate isn't just placed in still air after tempering. It's good practise to swiftly cool during both operations, to eliminate the risk of temper embrittlement in some low alloy steels.

True but your blows wont be as accurate wich is important in these kinds of armour

Or you could let the man be? He obviously knows what he's doing