What are the differences between the ferritic structure of 430 stainless steel and the austenitic structures of 304 and 316 stainless steels?

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430 ferritic stainless steel: Steel with a chromium content of over 12% can prevent oxidation caused by natural factors; such steel is known as stainless steel. This falls under the category of 430 ferritic stainless steel. It has a low coefficient of thermal expansion, along with excellent formability and oxidation resistance. It is designated as 430 under JIS standards, which is why it is also known as 430 stainless steel. Applications of 430 ferritic stainless steel: 430 stainless steel (16Cr) is commonly used in the manufacture of household appliances, heat-resistant utensils, burners, home appliance products, category 2 tableware, kitchen sinks, exterior decorative materials, bolts, nuts, CD spindles, and screens. Differences between 430 stainless steel and 304, 316 austenitic stainless steels: 430 stainless steel is identified from 304 and 316 austenitic stainless steels through spectral analysis and chemical element analysis. Both 304 and 316 are austenitic stainless steels; 316 is made by adding molybdenum to 304 stainless steel, and as a result, its resistance to rusting in seawater is much better than that of 304. The difference between 304, 316, and 430 lies in their rust resistance. 304 and 316 contain elements such as nickel and molybdenum in addition to chromium, and they are non-magnetic; as a result, the rust resistance of 304/316 austenitic stainless steels is much better than that of 430 stainless steel, and their prices are also much higher. Can a magnet attract 430 stainless steel? 304 and 316 are non-magnetic; they cannot be attracted by magnets. It generally does not generate heat in high-voltage electromagnetic environments, which is why it is widely used. Martensitic and 430 ferritic stainless steels, as well as precipitation-hardening stainless steels, are magnetic; they can be attracted by a magnet. Does 430 stainless steel rust? 430 stainless steel cannot resist oxidation caused by chemicals in the air. As there are increasingly more acidic chemicals in the air, 430 stainless steel will still oxidize (rust) due to non-natural factors after being used for a period of time. Which is better, 430 stainless steel or 304? 304 austenitic stainless steel has excellent corrosion resistance and is non-magnetic. Relatively speaking, austenitic stainless steel 304 is somewhat better than ferritic stainless steel 430. How much more expensive is 430 stainless steel compared to 304? Generally speaking, austenitic stainless steel 304 is twice as expensive as stainless steel 430.