Chemical Composition of AISI 201 1Cr17Ni5Mn6N Austenitic Stainless Steel
AISI 201 1Cr17Ni5Mn6N (AISI 201) is an austenitic stainless steel that contains a combination of chromium, nickel, manganese and nitrogen. This combination of alloying elements provides both excellent corrosion resistance and superior mechanical properties. AISI 201 stainless steel is epitome of strength and durability, and is widely known as the workhorse of the stainless steel industry.
AISI 201 is a ferritic stainless steel made up of a combination of chromium and nickel. The alloy is characterized by its high chromium content, which helps to provide superior resistance to corrosion and oxidation. The nickel content helps to increase the strength and ductility of the material while maintaining good weldability and formability. In addition, the manganese and nitrogen additions help to enhance its physical properties.
The AISI 201 chemical composition is given in Table 1.
Table 1. Chemical Composition of AISI 201 1Cr17Ni5Mn6N Austenitic Stainless Steel (wt%)
C Si Mn Ni Cr N Mo P S
0.10 1.00 6.00 17.00 5.00 6.00 0.50 0.03 0.03
C – Carbon: AISI 201 is a low carbon alloy. The maximum composition for carbon is 0.10 wt%. Any amounts beyond this limit could lead to significant unintended transformation of the steel during heat treatment.
Si – Silicon: Silicon is primarily used to improve the strength and formability of the material. A maximum limit of 1.00 wt% has been established to avoid any adverse effects resulting from unanticipated microstructural changes.
Mn – Manganese: Manganese is added to increase the strength of the austenitic microstructure and to help improve the formability of the metal. The optimum content range is between 6.00 and 10.00 wt%, with a maximum of 12.00 wt%.
Ni – Nickel: Nickel is a key element that improves the strength and formability of the material, with a maximum limit of 17.00 wt%.
Cr – Chromium: Chromium is the most important element for corrosion resistance. A minimum of 18.00 wt% is required for optimal corrosion resistance, but the alloy should not exceed 20.00 wt%.
N – Nitrogen: Nitrogen is added to improve the strength and formability of the material, with a maximum limit of 6.00 wt%.
Mo – Molybdenum: Molybdenum is added to improve the corrosion resistance of the material, with a maximum limit of 0.50 wt%.
P – Phosphorus: Phosphorus is added to improve the strength of the material, with a maximum limit of 0.03 wt%.
S – Sulphur: Sulphur is a detrimental element in terms of forming and machining, with a maximum limit of 0.03 wt%.
AISI 201 exhibits excellent forming and machining properties, making it ideal for a variety of industrial and commercial applications. The higher levels of nickel and chromium provide excellent corrosion resistance, making it suitable for use in food-grade applications. In addition, the material has good weldability and formability, making it suitable for a variety of fabrication processes.
AISI 201 is the perfect choice for applications that require a combination of strength, corrosion resistance and formability. The material has excellent durability and offers superior performance in applications such as food processing equipment, petroleum refining equipment, medical equipment and architectural structures.
