The main stainless steels: grades, characteristics.
Stainless steel is a type of alloy steel. Resistance to chemical and atmospheric corrosion is provided by a high content of chromium - more than 12 percent. On the air, a film is formed which protects the product from the negative effects of the external environment. On the modern market are different stainless steel. Stamps depend on the industry in which the material will be applied.
In our country, the steel industry is widely developed, therefore, special grades of stainless steel were developed, and their characteristics are governed by regulations. There are materials of the 300th and 400th series, having high corrosion resistance, resistance to chemicals, strength, ductility. What else is stainless steel? Brand 304 is considered universal, it is suitable for the manufacture of various products: cutlery, medical instruments, large-scale buildings.
All stainless steels, the grades of which are presented in the article, include carbon, chromium, nickel, and titanium. This series is considered universal, so this type of stainless steel is in demand in the modern market.
AISI 304 (08X18H10)
This material is considered to be food grade steel, as its chemical composition is suitable for use in the food industry. It is easy to cook, it has excellent anti-corrosion characteristics. It is AISI 304 stainless steels that are also used in the oil, pharmaceutical and textile industries.
AISI 316 (10X17H13M2)
This grade of stainless steel contains an insignificant amount of titanium, as a result of which the strength of the material increases, the resistance to temperature changes increases. Apply this brand in welded structures, to create turbine blades, as well as in the chemical and food industries. The availability of price, excellent technical characteristics of steel made it popular in the industry.
AISI 321 (12-08Х18Н10Т)
All stainless steels, the brands of which we are currently studying, are distinguished by a high content of titanium. This steel can withstand temperatures up to 800 degrees.This type is suitable for creating seamless pipes, flanges, branches, tees, adapters.
Steel 400 series
This series assumes a high content of chromium, there are practically no other alloying additives in this series. In such steel in a small amount contains carbon, so the stainless steel turns plastic, easily welded.
AISI 430 (12X17)
Stainless steels AISI 430 (12X17) suggest a small amount of carbon, a high percentage of chromium. Due to this ratio, steel is obtained increased strength, but it has a high ductility. It bends perfectly, stamped, welded. The performance characteristics of this brand are preserved even with sharp temperature fluctuations and when released into aggressive chemical environments. This brand is used for interior decoration, as well as in the chemical and petrochemical industries.
Stainless steel AISI 201 has a reasonable cost, instead of expensive nickel it contains nitrogen and manganese. Due to the balanced chemical composition, this brand is not inferior to the 300th and 400th series. The 200th series is used in the food and medical industry, for the creation of shaped and round pipes, for the manufacture of fences and handrails.
No industry today is complete without a stainless steel. Stainless steels of any brand have increased corrosion resistance, high mechanical strength. This material is able to withstand sudden changes in temperature, humidity. The chemical composition of steel is significantly different, but they are all alloys of iron and carbon. Depending on the brand, there are additional alloying elements in the steel.