0:00 Hello, friends. I don't know if you have ever bought an iron pot. As long as you have investigated the iron pot Or hit the iron pot in the search engine. You will find out Pig Iron Pot Wrought Iron Pot Fine Iron Pot Pure Iron Pot Cast Iron Pot Black Iron Pot Clam! That's a lot of iron. It's a sight for sore eyes. Can the average person really tell the difference? If it's hard to tell, forget it. The information is still very confusing. Like this pot that says it's a pig iron pot. And then it says it's pure iron. What's going on here? Is pig iron pure iron? There are some pots that are called pig iron pots but are made of carbon steel? Is pig iron also carbon steel? What's going on here? And then this. It's a cast iron yukihira pan. It uses high carbon steel made in Taiwan. Is cast iron also carbon steel? Doesn't that mean ‘pig iron = wrought iron = carbon steel = cast iron’?
0:45 Is this some kind of iron world human centipede? That's why I said the iron pot was complicated. It's a real mess. So there's no sponsor in this episode. There is a high risk of blocking someone's money. Let's solve the ‘Iron Pot Mess’ today! Of course, if you like our content Don't forget to click subscribe! First of all, let's take a look at Iron. As the first discovered, the most widely used and the most abundant metal in the world. People use iron in large quantities in a variety of fields People's livelihoods, industry, transport, and so on. It accounts for about 95% of the total metal consumption. But there's no way to use the iron ore you dig out of the ground. In order to become usable iron, it needs to go through a process of ‘iron refining’. Iron ore + coking coal + limestone are thrown into an ironmaking facility called a blast furnace.
1:31 The high temperature separates the impurities. And you get ‘pig iron’. And this pig iron is an intermediate product. It's not very likely to be an end product. And the pig iron is then continuously refined through various processes. We get ‘cast iron’, ‘steel’ and ‘wrought iron’. And the main difference between these irons is the carbon content. Carbon strengthens the crystal structure of iron. The higher the carbon content the harder it is. But the relative brittleness and lack of ductility. Differences in material properties also affect the processing techniques that can be used. also determines the properties of the pot. Pig iron is made into ‘cast iron’ by removing some impurities. Carbon content is about 2 to 4%. Hard and brittle But it flows well after melting. It's good for ‘casting’. That's why it's called cast iron. Casting is the process of pouring molten iron at high temperatures into moulds to form a shape.
2:17 The brittle cast iron cannot be made too thin. It breaks easily on impact. That's why the cast iron pots you see are usually thicker. That's why. But there is an advantage to being thicker, it's better at keeping heat in. Great for stews and the like! Then cast iron pots are more difficult to work with. So the handles will be cast together. Direct one-piece moulding A wooden handle, at best. That's one way to recognise it. Let's continue to refine the pig iron. And we'll get Steel. Commonly known as ‘Steel Professionally, we call it ‘carbon steel’. It has a carbon content of about 0.02 to 2%. It's much more ductile than cast iron. It's also easier to work with. So it's usually rolled into steel plates. And then they're pressed by forging and stamping. Making Lighter and Thinner Pots It also has a better thermal conductivity. This way, the wok is more suitable for cooking dishes that require high heat.
3:06 Most of the woks and pans on the market are made of carbon steel. And pans made by forging or stamping. The handles are usually assembled with additional dowels and so on. Although there are a few exceptions But it can also be a way of recognising As for ‘wrougth iron’, it can also be called ‘forged iron’. It contains less than 0.02 % carbon. It is the purest form of iron. It is extremely ductile and relatively corrosion resistant. But it's also less hard. In the 19th century it was used for forging swords, cutlery, fences, rails and so on. But later, as the technology of ‘low carbon steel’ advanced Clinker was gradually replaced by low carbon steel with better performance and lower price. Nowadays, it is seldom used in household goods That's why some of the products on the market claim to be 99% pure iron. or ‘wrought iron pots’. It's usually not really made of wrought iron. It's called ‘low carbon steel.’
3:51 But that doesn't preclude some centuries-old brands from following the old way of doing things. The use of wrought iron in pots and pans is real. But it's still very rare, isn't it? Let's sort out the properties of iron. This is the table. And this one, pig iron, is an intermediate product. In addition to carbon, there are some impurities. Although it can be used for casting But it's not really suitable for end-products. And cast iron is hard and brittle because of its high carbon content. It's very suitable for casting into cast iron pans. Carbon steel has a moderate carbon content. Hardness and ductility are good. Can be used to make thin, lightweight pans. Most of the woks and pans are made of carbon steel. Wrought iron has been replaced by low-carbon steel. It's not very common on the market anymore. So in short Nowadays, there should only be two types of iron pots on the market: cast iron and carbon steel.
4:39 Understanding Let's go back and look at what caused the Iron Cauldron Rebellion. One of the sources of the mess was the pig iron cauldron. As I said, pig iron is an intermediate product with a lot of impurities. Nowadays, it's rare to use pig iron directly in industry. So it's unlikely that this pot is made of pig iron, right? But the other picture says it's ‘pure iron’. Look at this handle on the side, it's assembled with dowels. It's so thin again. It's more likely that it's a stamped carbon steel pot. That's why. It's true that in ancient times it could have been due to war or economic factors. And the use of low-cost, contaminated pig iron for frying pans. So that people of a certain age would call the ‘big wok’ at a wok shop a ‘pig iron wok’. It was actually replaced by cast iron or carbon steel, which had better performance. Like this one, it's said to be an authentic old-fashioned pig iron pot. It's made of cast iron, right down to the bottom.
5:25 Take a look at this famous pig iron pot too. Here's a description of the material. It's actually made of carbon steel! Yes, it is. The ‘Pig Iron Pot’ has become the shape of an old-fashioned wok in some people's minds. You have to be very careful about what you actually use! Another source of confusion is ‘carbon steel, which has no rights.’ As I said before. Most pans and woks are usually made of low carbon steel. But there seems to be a hidden chain of contempt in the iron pan world. Pure iron > cast iron > carbon steel and so on. So the lowest-ranking carbon steel pot has to play a word game. Disguise it as something else to make it work. In fact, the ‘low carbon steel’ in carbon steel is already 99.9% pure. It's almost the same as cooked iron. So, ‘99% pure iron.’ ‘High purity iron pot’, “Fine iron pot”, “Cooked iron”.
6:10 This becomes a common kana for low-carbon steel pots. The word ‘iron’ makes it feel more natural, non-stick and non-toxic. Sort of a marketing genius phrase. Though the names do seem to sell. But for an industrial nerd like me I...I...I'm in pain just reading it ah ah ah ah ah ah ah You look like this Japanese made Chinese wok. The material says ‘black iron.’ Black iron is the common name for ‘hot-rolled steel sheet’. It's also a carbon steel plate. Actually, this is also a carbon steel pan! As for the title, it says ‘Cast Iron Yukihira Pan’. It also uses the mysterious ‘iron casting pot forging technique’. But there's not much in the description. But the material clearly says high carbon steel. So this is also a carbon steel pot. What is hot rolled steel, you ask? What is high carbon steel, low carbon steel? This is answered in our mandatory course on mass production of sheet metal. Links are in the comments section.
6:57 Please support us! Sorry, I accidentally did it... Actually, there is another source of confusion. It's just a bad company that's trying to mess things up. Internet platforms in particular A pot like this one is said to be old-fashioned cast iron. But there's a lot of perforation. The picture is still fake, it's a bit suspicious. And look at the production underneath. It says it's made of high-purity pig iron. It's rare for pig iron to be made into a product. It's even more suspicious. And then it says it's a four-step ‘casting’ process. The picture shows stamping or forging with pressurised steel plate forming. I don't know if it's a mistake or if it's just intentional. Another urban legend about Iron Is it something like, ‘Eating dishes made in cast iron pots will help you get iron’? Although it seems absurd at first glance But according to this study from 1999, it's been proven that Certain Low-Development Countries Cooking in iron pots has more iron replenishing effects than aluminium pots.
7:44 It can also reduce anaemia in children Some of the more famous ones are ‘Lucky Fish’. It's said to be thrown into a soup pot and cooked together. Add some acidic ingredients to release the iron. But in fact, in terms of the privileged life in Taiwan Iron in the daily diet is sufficient. It's not really necessary to do it this way. You might as well go eat meat. So, if you want to use iron supplements as an excuse. Go buy a fancy, beautiful cast-iron pot for 10,000 pieces. That's not going to work, ma'am. All in all, the current breed of iron pots. From a material point of view There are only two bases, ‘Cast Iron’ and ‘Carbon Steel’. The rest we have to take with a grain of salt. Sometimes there are too many messages. The information on the internet is not always true. It's just that modern people, even if they're not in the industrial world. They should know something about materials and manufacturing. So as not to be misled. That's all for today. See you next time.
