Precision seamless pipe is a kind of high-precision steel pipe material processed by cold drawing or hot rolling. Because the inner and outer walls of precision steel pipe have no oxide layer, bear high pressure and no leakage, high precision, high smoothness, cold bending without deformation, expansion It is mainly used to produce pneumatic or hydraulic components, such as air cylinders or oil cylinders, which can be seamless pipes or welded pipes. The chemical composition of precision steel pipes is carbon C, silicon Si, manganese Mn. , Sulfur, Phosphorus P, Chromium Cr. Compared with solid steel such as round steel, seamless steel pipe
is lighter in bending and torsion strength when the bending and torsion strength is the same. Components.
Classification of precision seamless tubes
Precision seamless tubes, precision hydraulic seamless tubes, cold drawn precision seamless tubes, cold rolled precision seamless tubes, high precision seamless tubes, precision bright seamless tubes.
The main varieties of precision seamless tubes:
DIN/EN series high-precision precision bright seamless steel pipes, special steel pipes for hydraulic systems, special steel pipes for automobile manufacturing.
Features and advantages of precision seamless tubes:
1. The precision is high, which saves the user's waste of labor and materials for machining.
2. There are many specifications and a wide range of applications.
3. The cold-rolled product has high precision, good surface quality and good straightness.
4. The inner diameter of the steel pipe can be made into a hexagonal shape.
5. The performance of the steel pipe is superior, and the metal is denser.
While inheriting the advantages of seamless steel pipes, precision steel pipes also have some of their own characteristics. The use of precision manufacturing of ring parts can increase the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours. For example, rolling bearing rings, jack sleeves, etc., have been widely manufactured with precision steel pipes. The popularization and application of precision seamless pipes is of great significance for saving steel, improving processing efficiency, reducing processing procedures or equipment investment. It can save costs and processing man-hours, increase production volume and material utilization, and help improve product quality and reduce costs. , Is of great significance to improve economic efficiency. Generally, precision seamless tubes are used in industries with high precision requirements, and most of them without precision requirements use seamless tubes. After all, the price of precision seamless tubes of the same specifications is higher than seamless tubes.
Tips: In case ASTM A53 Grade B in ERW (electric resistance welded) pipe, the weld seam shall be done the heat treatment with a minimum 1000°F [540°C]. In this way the no untempered martensite remains.
In case ASTM A53 B pipe in cold expanded, then expansion should not exceed 1.5% of the required OD.