Grain Size Of Tee Elbow In Pipe Fittings

1. The concept and significance of the grain size of Stainless Steel Weld Tee:

The grain size of stainless steel pipe refers to the measurement of the grain size in stainless steel material, which is one of the important indicators to measure the quality of stainless steel pipe material. The smaller the grain size, the better the toughness and ductility of the stainless steel pipe, and the rust resistance and corrosion resistance are also improved accordingly.

2. Grain size standard of stainless steel pipe fittings:

The grain size standard of stainless steel pipe fittings is tested in accordance with the provisions of GB/T 6394. The grain size value is determined by metallographic microscope detection of the test sample to evaluate the quality of stainless steel material.

According to GB/T 6394 standard, the grain size of stainless steel pipe is divided into 1-12 grades, 1 grade indicates the finest grain size, and 12 grade indicates the largest grain size. Generally speaking, the higher the grain size grade required in the project, the better the material selected, but at the same time the cost of the material also increases accordingly.

3. Factors affecting the grain size of stainless steel pipe fittings:

1. Material preparation process: The cooling rate, quenching method, heat treatment time and temperature of stainless steel pipes have a direct impact on the grain size.

2. Material composition: The quality, impurity content and purity of stainless steel pipes will affect the grain size.

3. Material state: The material state of stainless steel pipes, such as cold drawing, rolling, annealing, etc., will also directly affect its grain size.

4. How to improve the grain size of stainless steel pipes:

1. Optimize the preparation process: The grain size can be effectively controlled through reasonable heat treatment processes, normal cooling rates and other methods.

2. Select high-quality raw materials: Select stainless steel materials with low impurity content and high purity to improve their grain size.

3. Correctly handle the material of stainless steel pipes: Cold drawing, rolling and annealing of the material can improve its grain size. At the same time, the material should also be prevented from being affected by adverse factors such as mechanical damage and extrusion deformation during the preparation process.