Brief Introduction of Chromium-Nickel Austenitic Stainless Steel 1Cr18Ni9

Introduction to 1Cr18Ni9 Steel

1Cr18Ni9 is a type of austenitic stainless steel, which belongs to the 18% chromium, 8% nickel alloy series. It’s a kind of Chinese product standardized by GB1220-84.

1Cr18Ni9 stainless steel is an alloyed product composed of chromium, nickel and carbon. It is highly resistant to rust, high temperature and corrosive environments, giving the alloy its unique properties. This steel is used in a wide range of applications and industries, including chemical and petrochemical engineering, power plants, construction, automotive and aerospace.

1Cr18Ni9 stainless steel is also known as Type 304 or Aisi 304 stainless steel. It is a corrosion-resistant, oxidation-resistant variant of Type 304. The alloying elements added to make it corrosion resistant include chromium, nickel, molybdenum, phosphorus, and nitrogen. In comparison to Type 304 alloy, it has improved resistance to intergranular corrosion and pitting corrosion.

Physical Properties

1Cr18Ni9 has a molecular weight of 502.75 and a density of 7.94 g/cm3. Its melting range is between 1398°C to 1454°C. The alloy is ductile and has a high temperature strength and a moderate temperature ductility.

Mechanical Properties

1Cr18Ni9 stainless steel has a high tensile (H) strength of 500-650 MPa, and a modulus of elasticity (E) of 200-210 GPa. It has good ductility and toughness, and a good thermal conductivity.

Corrosion Resistance

1Cr18Ni9 is highly resistant to corrosion due to its chromium content and its general corrosion resistance is superior to other similar alloys from different series. Its resistance to localised corrosion, such as pitting corrosion, corrosion fatigue and intergranular corrosion, is also very good. It has improved resistance to corrosion from organic and inorganic acids, bases and salts.

Fabricating with 1Cr18Ni9

1Cr18Ni9 stainless steel can be easily fabricated with standard tools, including cold forging and cold forming. Due to its exceptional ductility and machinability, it is ideal for a variety of fabrication processes, such as stamping and forming, welding and machining, and plasma cutting and welding. It is also well-suited to grinding and polishing and is available in several forms, such as bars, strips, sheets and tubes.

Applications

1Cr18Ni9 stainless steel is extensively used in the chemical processing industry, equipment manufacturing and petrochemical industries. It is suitable for use in a wide range of applications, such as food processing, oil and gas refining and production, water treatment, and pharmaceutical manufacturing. Its superior corrosion resistance makes it ideal for medical and surgical tools, marine equipment, and aerospace components.

Conclusion

1Cr18Ni9 stainless steel is an extremely versatile and reliable alloy. Its superior corrosion resistance, high thermal conductivity and good mechanical properties make it a suitable choice for a variety of applications and industries. In addition, its fabrication and machinability make it a cost-effective option for a number of applications.

1Cr18Ni9 steel is a common stainless steel grade with austenitic structure. It is widely used in the manufacture of various engineering components, such as bolts, nuts, screws, and electrical components. It has excellent mechanical properties, corrosion resistance and good resistance to high temperature.

1Cr18Ni9 is an 18% chromium - 8% nickel austenitic stainless steel. The chemical composition is (wt %): C ≤ 0.08, Si ≤ 1.0, Mn ≤ 2.0, Cr: 18-20, Ni: 8-10. It has excellent resistance to corrosion and oxidation up to 1200°F (649°C). The combination of chromium and nickel increases the strength and hardness of the steel.

The mechanical properties of 1Cr18Ni9 steel are as follows: yield strength (MPa): 200-450; tensile strength (MPa): 500-720; elongation (%): ≥35; impact (J): 2 fillet 7.

1Cr18Ni9 steel has various applications. It is mainly used in the manufacture of food processing machinery, kitchen utensils, and beverage storage tanks. It can also be used for making chemical, petrochemical and nuclear industry components or elements.

In summary, 1Cr18Ni9 steel is an austenitic stainless steel with excellent mechanical properties, corrosion resistance and good resistance to high temperature. It is a quality steel grade with wide applications.