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The difference between 304 and 430 stainless steel
Feb 01, 2018

1. First of all, what is stainless steel? It refers to corrosion resistant steel in the atmosphere and weak corrosive medium. The corrosion rate is less than 0.01mm/ year, which is considered as "total corrosion resistance"; The corrosion rate is less than 0.1mm/ year and is considered to be "corrosion resistant".
China stainless steel models is to use symbol to add Numbers, such as 1 cr18ni9, 0 cr18ni9, 0 cr18ni9, 1 cr17, 3 cr13, 1 cr17mn6ni5n etc., the figures show that the corresponding elements.
Common stainless steel models commonly used digital symbol, 200 series, 300 series, 400 series, they are the representation in the United States, such as 201202302303304316410420430, the American institute of steel is to mark all kinds of standard level in the three figures wrought stainless steel. Among them:
The austenitic stainless steel is marked with a series of 200 and 300 series, with a number of 400 series of stainless steel and martensitic stainless steel. For example, some relatively common austenitic stainless steel is 201, 304, 316 and 201 mark, (3) ferritic stainless steel in 430 and 446 for tags, martensitic stainless steel in 410, 420 and 440 c for tags, bipolar (austenitic - ferrite), (4), precipitation hardening stainless steel stainless steel and iron content less than 50% of the high alloy is usually USES the name of the patent or trademark name.
2. Functional differences:
304 is a widely used stainless steel material which is widely used in the production of equipment and equipment requiring good comprehensive performance (corrosion resistance and molding). Corrosion in the building can withstand, can resist food processing medium erosion (but with concentrated acid and chloride composition state of high temperature corrosion may occur), resistance to organic compounds, dyes and a wide range of all kinds of inorganic compounds. 304 l (low carbon), nitric acid resistance is good, and durable medium temperature and the concentration of sulfuric acid, widely used for liquid gas storage tank, instruments used for cryogenic equipment (304 n), other consumer products, kitchen equipment, hospital equipment, transportation tools, waste water treatment plant.
The 430 type is lower than 304 alloy and is used for high polishing decoration in the moderate atmosphere. It can also be used as nitric acid and food processing equipment.
The difference of stainless steel 201 and 304 is 1, specification: the commonly used stainless steel sheet is divided into 201 and 304 two models, actual is the composition is different, 304 quality is better some, but the price is expensive, 201 is inferior. 304 is imported stainless steel plate, 201 is domestic stainless steel plate.
2. The composition of 201 is 17cr-4.5 ni-6mn-n, which is the substitute steel for Ni steel and 301 steel. Magnetic after cold processing, used in railway vehicles.
3. 304 is composed of 18cr-9ni, which is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, xitong chemical equipment, nuclear energy and so on.
4. 201 is high in manganese, with dark bright surface, high manganese and easy to rust. 304 contain chromium more, surface appears matte, do not rust. There is a comparison between the two. The most important thing is that the corrosion resistance is different. The corrosion resistance of 201 is very poor, so the price is much cheaper. Since the price of 201 is low, the price is lower than 304, so the corrosion resistance is less than 304.
The difference between 201 and 304 is that of nickel. Moreover, the price of 304 is now more expensive, generally approaching 50,000 tons, but 304 can guarantee that it will not rust in the process of use. (experiment with potions)

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