Mechanical Properties of Martensitic Stainless Steel 44090 9Cr18

Mechanical Properties of Martensitic Stainless Steel 44090 9Cr18

Abstract

Martensitic stainless steel 44090 9Cr18 is a chromium-manganese austenitic stainless steel with good corrosion resistance, toughness and strength and enhanced wear resistance properties. In this report, the mechanical properties of this grade of steel are discussed, along with a comparison of the alloy with other grades of stainless steel.

Introduction

Martensitic stainless steel 44090 9Cr18 is a chromium-manganese austenitic stainless steel with good corrosion resistance, toughness and strength, and enhanced wear resistance properties. This grade of steel contains 9.0 wt.% chromium and 18 wt.% manganese, and offers good corrosion resistance in low sulfuric acid concentrations and chloride-containing solutions. The hardness of this material is in the range of Rockwell C 37-44 and its yield strength can be as high as 700MPa.

This grade of steel is commonly used in the manufacture of knives, tools and other abrasive components. It is also used in medical, automotive and aerospace applications, and is suitable for applications in which wear resistance and fatigue strength are required.

Mechanical Properties

The mechanical properties of Martensitic stainless steel 44090 9Cr18 can be divided into two categories: tensile and yield properties. The tensile properties of this grade of steel are given in Table 1.

Table 1: Tensile Properties of Martensitic Stainless Steel 44090 9Cr18

Property Value Ultimate Tensile Strength (MPa) 780 0.2% Yield Strength (MPa) 714 Elongation (%) 17

The yield properties of this grade of steel are given in Table 2. The 0.2% Yield Strength of 780MPa for 410 grade steel is higher than for other grades such as 304 and 316, which are commonly used in a range of applications.

Table 2: Yield Properties of Martensitic Stainless Steel 44090 9Cr18

Property Value 0.2% Yield Strength (MPa) 790 Hardness (HRB) 167 Vickers Hardness (HV) 459

Comparison of Mechanical Properties

Martensitic stainless steel 44090 9Cr18 has higher tensile and yield strengths than austenitic stainless steels such as 304 and 316. This is a result of its higher carbon and manganese content, which increases its hardenability. Its hardness is also higher than that of 304 and 316 steels due to its high chromium and manganese content. The ultimate tensile strength of Martensitic stainless steel 44090 9Cr18 is also higher than that of other grades of stainless steel. This is because of its higher chromium and manganese contents.

Conclusion

Martensitic stainless steel 44090 9Cr18 is a chromium-manganese austenitic stainless steel with good corrosion resistance, toughness and strength, and enhanced wear resistance properties. It has higher tensile and yield strengths than austenitic stainless steels such as 304 and 316, and higher hardness due to its higher chromium and manganese content. It is commonly used in applications in which wear resistance and fatigue strength are required, such as in the manufacture of knives, tools, and other abrasive components.

Martensitic stainless steel 44090, also known as 9Cr18, is a ferritic and martensitic stainless steel that combines the hardenable elements of chromium and molybdenum with the corrosion resistance of a martensitic stainless steel. 9Cr18 is a martensitic stainless steel with high strength and moderate corrosion resistance. It can be used in food and medical equipment.

The mechanical properties of Martensitic Stainless Steel 44090 9Cr18 depend on its solution treatment, including its hardness, tensile strength and yield strength. The hardness of 9Cr18 can reach HRC 58-63, and the tensile strength can reach 930 MPa, while the yield strength can reach 817 MPa. 9Cr18 also has good fatigue strength and wear resistance, showing good performance in the production of hydrogenated materials and diesel engines.

Due to the addition of molybdenum in its composition, 9Cr18 has good corrosion resistance in fresh water and acidic media, but poor corrosion resistance in marine and chloride environments. In addition, 9Cr18 has good resistance to oxidation, showing high use value in areas where high temperature strength is required.

9Cr18 has high polishing performance, good welding performance and is easy to process by cutter. Therefore, Martensitic Stainless Steel 44090 9Cr18 is widely used in food machinery and medical equipment. Whats more, its high wear resistance makes it suitable for high-end decorative products.

In summary, Martensitic Stainless Steel 44090 9Cr18 has a wide range of uses. Its corrosion resistance is not as strong as austenitic stainless steel, but its hardenability, weldability and machinability are better. It is suitable for the production of hydrogenated materials, diesel engines and high-end decorative products.