Stainless steel is divided into three categories: austenitic stainless steel (A1, A2, A3, A4, A5), ferritic stainless steel (F1) and martensitic stainless steel (C1, C4, C3).

Austenitic stainless steels contain 16%-26% chromium and up to 35% nickel, generally have the highest corrosion resistance, cannot be strengthened by heat treatment, and are nonmagnetic; the most common type is 18/8, or grade 304, That is, it contains 18% chromium and 8% nickel; typical uses include the aircraft industry, dairy and food processing industries. Austenitic stainless steel (A*-50 is softer / A*-70 is suitable for cold working / A*-80 is high strength)
Standard ferritic stainless steel contains 10.5%-27% chromium, but does not contain nickel. Due to the low carbon content (less than 0.2%), it cannot be strengthened by heat treatment and is only used in occasions where corrosion resistance is not high, such as construction and automobiles. In terms of decoration. Ferritic stainless steel (F1-45 is softer/F1-60 is suitable for cold working)
Martensitic stainless steel usually contains 11.5%-18% chromium and less than 1.2% carbon, sometimes nickel, can be strengthened by heat treatment, has moderate corrosion resistance, and is used in knives, surgical instruments, wrenches and turbines.
Stainless steel is divided according to its corrosion resistance: stainless steel (resistance to corrosion in the air) and stainless acid-resistant steel (resistance to corrosion in certain chemical media).

According to the chemical composition, it can be divided into high-chromium stainless steel (such as 4Cr13, Cr17, Cr28, Cr17Ti, etc.), chromium-nickel stainless steel (such as 0Cr18Ni9Ti, Cr18Ni12Mo2Ti), chromium-manganese-nitrogen stainless steel (such as Cr17Mn13Mo2N)

PromiSteel is a professional supplier in the stainless steel market. We have a complete logistics system and various modes of transportation. Within our product range you will find stainless steel products in the 400, 200 and 300 series, including coil, plate, strip and tube. Our company guarantees timely and high quality delivery of any product in any quantity. Several factors contribute to the ability to provide buyers with the most profitable offers:
We have a large stock of stainless steel in different grades in our warehouse;
Direct contracts with all major manufacturers;
Ongoing system purchases;
Great experience.
  PromiSteel has many highly qualified employees. Consumers in many countries appreciate our services and the quality of the products we offer. The permanent warehouse stock is 5000 tons, which allows you to choose the material with the required properties according to the customer's requirements, and quickly complete any order in the shortest time.

The company PromiSteel not only operates effectively in the field of metal supply and stainless steel pipe production. The price of stainless steel is formed by several basic factors: purchase price, and follow-up services. This practice minimizes direct and indirect costs. We also supply slitting and cutting coils, grinding flat and electric welded stainless steel tubes according to customer requirements, edge milling, roll straightening of thick plates.