Your link says these are elements commonly found in steel, not that they are all required. In fact it says of phosphorus and sulphur that they are generally undesirable.
We don’t need to make a steel sword, an iron sword could do.
Either way you would definitely need carbon, but as you say that’s pretty easy. I don’t think any of the other elements are absolutely required.
Steel requires only iron and up to about 2% carbon
Rest are minor alloying elements used mainly in modern steel alloys to improve the steel beyond what just carbon steel could do like for example stainless steels
Those are all of them, but that’s for a lot of different types of steels. You don’t have to have all of those metals to make steel. You really just need iron and a tiny bit of carbon. A few of your ingredients help with purity, and the rest are additives for different steel properties you may want. Like a touch of nickel for stainless steel.
These are the required elements for making steel:
Source: https://www.cliftonsteel.com/education/11elementsfoundinsteel
So, iron is only step 1. Humans are carbon based lifeforms, so I’m guessing that carbon is also sorted, that’s step 2.
There’s plenty of other elements in the human body, like phosphorus and sulphur, but I’m guessing that it’s going to take more than 300 adults.
Source: https://sciencenotes.org/elements-in-the-human-body-and-what-they-do/
Source: https://sciencenotes.org/wp-content/uploads/2019/02/PeriodicTableHumanBody.png
Yes
Either way you would definitely need carbon, but as you say that’s pretty easy. I don’t think any of the other elements are absolutely required.
Someone else did the math, accounting for waste made during forging. https://www.wearethemighty.com/mighty-gaming/blood-iron-sword-myth-explored/
Steel requires only iron and up to about 2% carbon
Rest are minor alloying elements used mainly in modern steel alloys to improve the steel beyond what just carbon steel could do like for example stainless steels
Those are all of them, but that’s for a lot of different types of steels. You don’t have to have all of those metals to make steel. You really just need iron and a tiny bit of carbon. A few of your ingredients help with purity, and the rest are additives for different steel properties you may want. Like a touch of nickel for stainless steel.