They are all stainless steel. Do you know its classification and application scenarios?
Stainless steel is the abbreviation of stainless steel and acid-resistant steel. Steel types that are resistant to air, steam, water and other weakly corrosive media or have stainless steel properties become stainless steel.
The classification of stainless steel includes Austenitic stainless steel, FERRITIC stainless steel, MARTENSITIC stainless steel, DUPLEX stainless steel, and PRECIPITATION stainless steel.
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Let’s talk about stainless steel categories of different weights and their application scenarios:
AUSTENITIC stainless steel mainly includes 304, 316, 201, 202, 301.
304 stainless steel is suitable for making food, processing equipment, pharmaceutical equipment, chemical equipment, decorative pipes and home appliances, such as kitchens, sinks, tableware, ovens, water heaters, washing machines, etc.
316 stainless steel is used to make highly corrosive equipment, such as marine equipment, chemical equipment, medical equipment, pharmaceutical equipment, etc. For example, the production of ocean platforms, seawater desalination equipment, medical equipment, pharmaceutical storage tanks, etc.
201 stainless steel is used to make household items, architectural decoration, tableware, kitchens, bathrooms and other fields. For example, making door handles, tableware, wash basins, shower rooms, etc.
202 stainless steel is used to make kitchen utensils, home decoration, architectural decoration and other fields, such as making pans, spatulas, lamps, furniture doors and windows, etc.
301 stainless steel has high strength and corrosion resistance and is used to make springs, syringes, electronic devices, etc., such as automobile parts, medical equipment, electronic components, etc.
FERRITIC stainless steel includes 430, 409, 441, 444, and 446 categories.
430 stainless steel is used in home construction, decoration, kitchen, bathroom and other fields, such as making stoves, refrigerators, dishwashers, etc.
409 stainless steel is used to make automobile exhaust systems, storage tanks, pipes, chimneys and other fields, such as making automobile exhaust pipes, chimneys, etc.
441 stainless steel is used to make automobile exhaust systems, chimneys, storage tanks, pipes and other fields, such as making automobile exhaust pipes, chimneys, etc.
44 stainless steel is used in the production of marine equipment, architectural decoration, chemical equipment and other fields, such as the production of marine structures, chemical equipment, etc.
446 stainless steel is used to make high-temperature equipment, heat treatment equipment, chemical equipment and other fields, such as making high-temperature stoves, heating elements etc.
MARTENSITIC stainless steel includes categories 410, 416, 420, and 431.
410 stainless steel is used to make knives, boiler tubes, automobile exhaust systems, mechanical parts, bolts and other fields.
416 stainless steel is used to make cutting tools, valves, bearings, automobile parts and other fields, such as making high-strength bolts, automobile bearings, etc.
420 stainless steel is used to make knives, watches, medical equipment, petrochemical equipment and other fields.
431 stainless steel is used to make high-strength bolts, bearings, automotive parts, chemical equipment and other fields, such as making high-strength bolt automotive bearings.
DUPLEX stainless steel includes 2205, 2507, 2304, 2101 categories.
2205 stainless steel is used in the production of chemical equipment, marine engineering, oil and gas processing equipment and other fields, such as the production of chemical reactors, offshore platforms, oil and gas pipelines, etc.
2507 stainless steel is used in the production of marine engineering chemical equipment, oil and gas processing equipment and other fields, such as the production of offshore platform chemical reactors, oil and gas pipelines, etc.
2304 stainless steel is used in the production of sewage treatment, building decoration cooling systems and other fields, such as the production of sewage treatment equipment, building decoration material cooling towers, etc.
2101 stainless steel is used in the fields of construction, decoration, home appliances, food processing, etc., such as building decoration materials, home appliance parts, food processing equipment, etc.
PRECIPITATION stainless steel contains 17-4PH, 15-5PH
17-4PH stainless steel is used to make high-strength, high-corrosion-resistant and high-temperature equipment in aerospace, chemical industry, marine engineering and other fields, such as making aerospace engine parts, chemical equipment, hydraulic systems, turbine blades, etc.
15-5PH stainless steel is used to make high-strength, corrosion-resistant and wear-resistant equipment in aerospace, shipbuilding, automotive, medical and other fields, such as making ship parts, auto parts, medical equipment, etc.
The following picture will give you a clear understanding of the differences and usage scenarios of modification:
Q&A TIME:
Q: Dear, is the 420 blade used in the food supplement machine safe?
A: The cutter head made of 420 material is safe, and the material contains enough carbon to keep the knife sharp. 420 has good oxidation resistance and corrosion resistance, and the tool will not rust easily during use. It has high hardness and good wear resistance. However, the toughness of the material is slightly lower. If the force is too high (you need to handle harder ingredients, you may need to consider some materials with higher hardness and stronger wear resistance.), it may cause the tool to break. It should be cleaned and maintained regularly to maintain its performance.
Q: My table spoon and snow pan are made of 430 stainless steel. Are they safe to use? There is also a set of sinks and drain basins from 201. Are they safe to use?
A: 430 contains high chromium and has good corrosion resistance and processing performance, but is not resistant to acids, salts and other properties. Table spoons and snow pans made of this material are generally safe to use as long as they are not exposed to acidic or salty environments for a long time. 201 is worse than 430, especially in terms of corrosion resistance. If it is exposed to acidic or alkaline substances for a long time, it may cause rust. As long as you are careful not to store salty or acidic food in the sink and drain basin for a long time, there should be no problem in daily use. Pay attention to maintenance~
Q: Will 420 and 304 react with dishwasher detergent?
A: Dishwasher detergent often contains chlorine, which is corrosive to most metals. Although 420 and 304 are both made of stainless steel, long-term or frequent contact with chlorine-containing detergents may cause slight corrosion on the surface, affecting its appearance and durability. It’s not a problem to put it in the dishwasher once in a while, but it is recommended to wash it by hand as much as possible to extend its service life. At the same time, wipe dry after washing!
Don’t worry about the dishwasher. Dishwasher manufacturers usually take this issue into consideration and choose materials that can resist detergent corrosion, or add a protective layer to the inner wall. In addition, dishwashers are generally designed with a drainage system in mind to ensure that detergent does not remain on the inner wall for a long time. Therefore, as long as the dishwasher is used correctly and cleaned and maintained regularly, generally speaking, the inner wall of the dishwasher can withstand detergent corrosion. But if you notice any signs of damage or corrosion on the interior walls, contact the manufacturer immediately for repair or replacement.
Q: Can S31603 austenitic stainless steel (inner tank) be used for this kind of thermos cup?
A: Yes, the American standard UNS code of S31603 (316L) stainless steel is austenitic stainless steel. S31603 has low carbon content, so its resistance to intergranular corrosion is also very good. 316L stainless steel has good oxidation resistance in high temperature environments.
Q: For a knife, is 420 or 410 better?
A: 420 has higher carbon content and higher hardness than 410, making it more suitable for making knives that require sharp edges. Due to its higher carbon content, 420 stainless steel has slightly less corrosion resistance. Which material is better depends on your specific requirements for the knife. If what you need is a sharp edge, then the 420 may be more suitable for you. If you care more about corrosion resistance and durability of your knife, then 410 may be more suitable for you.
Q: Can 400 series stainless steel forks and spoons be used?
A: Compared with type 304 or 316, the corrosion resistance of the 400 series is slightly worse. Regular exposure to acidic or salty foods can cause corrosion or rust. Spoons made from 400 series stainless steel are safe in most circumstances, but to ensure durability and food safety, it is recommended to check them regularly for corrosion or rust and replace them immediately if any problems are discovered.
Q: I want to buy a stainless steel bed. Which material is suitable for a bed, 202 or 304?
A: If you have sufficient budget and want the bed frame to have a longer service life, then 304 stainless steel will be a better choice. If the budget is limited and it is not used in a humid environment, 202 stainless steel is also a good choice.
Q: Can I use Big Brother 301 stainless steel sink?
A: The corrosion resistance of 301 is worse than that of 304 or 316 stainless steel. For sinks, corrosion resistance is very important due to constant exposure to moisture and various cleaning agents. If the budget is limited, 301 stainless steel sinks are also available, but they require more frequent cleaning and maintenance to prevent rust.
Q: What is the difference between 316l thermos cup and sus316l? I don’t have sus on the front and I don’t know if it can be used?
A: SUS is the Japanese industrial standard naming method, and 316L is the American ASTM standard naming method. Whether it is a thermos cup marked 316L or SUS316L, the material is the same.
Q: Hello ! I would like to ask what material should I choose for the dry pot pot?
A: You can look at cast iron and stainless steel. Cast iron pots have excellent thermal conductivity and can evenly transfer heat to food, so that food is heated evenly and the dry pot cooking is delicious. And the cast iron pot has good heat preservation performance, which can keep the food hot and keep the food hot for a long time. Stainless steel pots have good wear resistance and corrosion resistance. They are a good choice for dry pot dishes that often require frying. And stainless steel pots are easy to clean and more hygienic. It should be noted that no matter which pot material you choose, you must pay attention to the thickness of the pot. A pot that is too thin will easily burn the food, while a pot that is too thick will conduct heat slowly and the cooking time will be relatively long.
Q: The blade of the wall breaking machine is made of 301 stainless steel. Is there any problem?
A: 301 has good corrosion resistance and wear resistance, but if used improperly, such as continuous work for a long time, it may cause the blade to overheat and affect the service life of the blade. As long as you pay attention to proper operation methods and maintenance during use, you can ensure its good use effect and service life.
Q:Hello! I have been looking at disinfection cabinets for a few days. Is the 410 stainless steel inner wall material used by the merchants really usable at a high temperature of 125 degrees? ? Is 304 stainless steel resistant to long-term high temperatures of 125 degrees? Are these two materials suitable for use with UV ➕ hot air (around 70 degrees)? [Flying Kiss R] These three questions are very important to me. I hope you can help answer them. Thank you.
A: Question 1: It can be used. Long-term use at high temperatures may cause chromium to oxidize and reduce its corrosion resistance. The disinfection cabinet needs to be cleaned and maintained regularly during use. Question 2: 304 can withstand long-term use in an environment of 125 degrees. Although 304 stainless steel can be used in an environment of 125 degrees for a long time, in order to ensure its service life, it is best to clean and maintain it regularly. Question 3: 304 and 410 are both heat-resistant and corrosion-resistant materials, and can adapt to hot air environments around 70 degrees. At this temperature, the performance of both materials is not significantly affected. As for UV rays, stainless steel itself is relatively resistant to UV rays. Ultraviolet rays mainly cause aging and degradation of materials through oxidation reactions, and the corrosion resistance of stainless steel materials can effectively prevent this oxidation reaction from occurring. It is still recommended to perform regular cleaning and maintenance to maintain its good performance.
Q: My table spoon and snow pan are made of 430 stainless steel. Are they safe to use? There is also a set of sinks and drain basins from 201. Are they safe to use?
A: 430 contains high chromium and has good corrosion resistance and processing performance, but is not resistant to acids, salts and other properties. Table spoons and snow pans made of this material are generally safe to use as long as they are not exposed to acidic or salty environments for a long time. 201 is worse than 430, especially in terms of corrosion resistance. If it is exposed to acidic or alkaline substances for a long time, it may cause rust. As long as you are careful not to store salty or acidic food in the sink and drain basin for a long time, there should be no problem in daily use. Pay attention to maintenance~
Q: Can 201 stainless steel buckets be used to store water, for washing vegetables and brushing teeth?
A: 201 stainless steel can be used to store water, including washing dishes and brushing teeth. However, there are a few points to note: Although 201 has certain corrosion resistance, its corrosion resistance is not as good as 304 or 316 stainless steel. If the water quality contains more chloride ions (such as hard water), strong acid or strong alkali, it may cause corrosion of 201 stainless steel. If you plan to store water for a long time, it is best to choose 304 or 316 stainless steel as they have better corrosion resistance. It should be kept clean to avoid accumulation of sediments such as scale in the barrel, which may corrode stainless steel. As long as the above precautions are followed, it is perfectly fine to use 201 stainless steel buckets to store water for washing vegetables and brushing teeth.
Q: The 202 steamer does not come into direct contact with food. Is it safe to use it as a porcelain bowl to steam food? Will heavy metals dilute out of metals at high temperatures and contaminate food through water vapor?
A: Under normal conditions, 202 stainless steel will not release heavy metals. However, if used in high temperature, high acid, and high alkali environments, trace amounts of metal elements may be eluted. However, if your steamer is only used to steam food, and the food does not come into direct contact with the steamer but is just placed in the porcelain bowl, it is usually safe. One thing to note is that no matter what kind of kitchen utensils are used, they need to be cleaned and maintained regularly ~ [Raise your hand R]
Q: Which one is more suitable for kitchen shelves, 201 with a thickness of 0.7 and 304 with a thickness of 0.4?
A: When considering materials, 304 stainless steel is usually the first choice. 304 stainless steel has good corrosion resistance and high temperature resistance, making it very suitable for kitchen environments. On the other hand, 201 stainless steel has poor corrosion resistance and is prone to rust in humid or high-salt environments. As for thickness, 0.7mm material will be stronger than 0.4mm material and can withstand heavy objects better. However, if the shelf is only used to store some lightweight kitchen utensils and ingredients, then a thickness of 0.4mm is enough. Therefore, if your budget allows, it is recommended to choose a shelf made of 304 stainless steel. As for the thickness, it depends on the weight of the items you need to place.
Q: Is there any difference between 202 and 201 for dining tables?
A: There is not much difference in practicality between 201 and 202 stainless steel. 202 has a slightly higher nickel content and is slightly better than 201 stainless steel in terms of corrosion resistance, but in actual use, this difference is almost negligible. In general, the material you choose mainly depends on your budget and personal preference.
Q: When I buy a spoon, I don’t know what kind of stainless steel it is. Is it okay to just say it is 400 series stainless steel?
A: For tableware such as spoons, it is okay to use 400 series stainless steel. It should be noted that due to its slightly weak corrosion resistance, care needs to be taken when using it to avoid long-term exposure to humid environments to avoid rust. In addition, although stainless steel tableware is relatively safe, not all stainless steel can be used to make tableware because harmful heavy metal elements may be used in some stainless steel during processing. It is recommended that when purchasing, choose a reputable brand to ensure product quality~
Q: Both the cutter heads of soymilk machines are 301 or 430, which one is better?
A: The main feature of 301 stainless steel is that it is very corrosion-resistant, in other words, it does not rust easily. Because it contains more nickel and chromium, these two elements can form a protective film to prevent the steel from rusting when exposed to air and moisture. The main feature of 430 stainless steel is its high hardness, which means it is not easily scratched or deformed. Because it contains more iron and carbon. For the soymilk machine cutter head, if you want it to be more durable and less likely to rust, you can choose 301 stainless steel. If you want it to be harder and not easily scratched or deformed, you can choose 430 stainless steel.
Q: Which aluminum alloy is better, 602 or 7075?
A: What is it used for? 7075 aluminum alloy is an aluminum alloy containing zinc. It is the strongest aluminum alloy in the aviation industry and has good mechanical properties and anodizing properties. 602 aluminum alloy has higher hardness, better tensile strength and yield strength, and also has good corrosion resistance and welding performance.
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