What are the quality requirements of seamless steel tube

What are the quality requirements of seamless steel tube?

1. Dimensional accuracy and shape
The geometric dimensions of seamless steel tube mainly include the outer diameter, wall thickness, ovality, length, curvature, end face slope, groove angle and blunt edge of seamless steel tube, cross-sectional dimensions of heterosexual seamless steel tube, etc.

2. Surface quality

3. Physical and chemical properties
Including the mechanical properties at room temperature and at a certain temperature (thermal strength and low temperature properties) and corrosion resistance (such as oxidation resistance, water corrosion resistance, acid-base resistance, etc.) generally depend on the chemical composition, structural properties, purity and heat treatment of steel. In some cases, the rolling temperature and deformation degree of seamless steel tube will also affect the performance of seamless steel tube.

4. Process performance, including expanding, flattening, crimping, bending, ring drawing and welding performance of seamless steel tube.

5. Metallographic structure, including low-power structure and high-power structure of seamless steel tube.

6. Special requirements, requirements beyond the standards put forward by users when using the seamless steel tube.