What are the physical properties of seamless tubes?

What are the physical properties of seamless tubes?

1. Composition of chemicals. There are specifications for the amount of dangerous chemical elements like As, Sn, Sb, Bi, and Pb as well as gases like N, H, and O. To enhance the consistency and purity of steel’s chemical composition, decrease non-metallic inclusions in tube blanks, and The molten steel is typically refined using equipment outside of the furnace, or the tube blanks can be remelted and refined in an electroslag furnace, to improve distribution.

2. Appearance and accuracy of dimensions. The outer diameter, wall thickness, ovality, length, curvature, pipe end slope, bevel angle, blunt edge, and cross-sectional dimensions of the heterogeneous steel pipe are the primary geometric dimensions of seamless tubes.

3. Quality of surface. The smooth surface requirements for seamless steel pipes are outlined in the standard. Cracks, hair lines, rolled breaks, inward and outward folds, inner and outer straights, separation layers, scars, pits, convex bumps, and hemp are examples of common defects. Pits (pockmarks), abrasions (scratches), green lines, inner and outer spiral paths, dents that need to be fixed, roller marks, etc. Dangerous defects include cracked surfaces, pitted surfaces, green lines, scratches, slight internal and external straight lines, slight internal and external spirals, straightening of steel pipes, and inward and outward folds, rolled breaks, separation layers, scars, pits, and convex bulges. Common flaws include roller marks and concave surfaces.

4. Chemical and physical characteristics. comprising corrosion resistance and mechanical characteristics at a specific temperature, as well as mechanical characteristics at room temperature. In general, it is determined by the steel’s chemical makeup, structural characteristics, purity, and heat treatment technique. In certain instances, the steel pipe’s performance may also be impacted by its rolling temperature and degree of deformation.

5. Process effectiveness. encompassing the steel pipe’s ring-drawing, flaring, flattening, curling, bending, and welding characteristics.
6. Structure of metals. involving steel pipes with both high- and low-magnification structures.
7. Particular needs. requirements for using steel pipes that differ from those suggested by standards.

The seamless tube is more practical and cost-effective the thicker its wall. The product’s partial performance is determined by its process, which is typically seamless; secondly, the thinner the wall thickness, the higher the processing cost will be. Because of the uneven wall thickness, low brightness on the inner surface, high sizing costs, and difficult-to-remove pits and black spots, the tube’s accuracy is low. Moreover, its detection and shaping need to be done offline. It thus demonstrates its superiority in mechanical structural materials, high pressure, and high strength.