The difference between cold drawn seamless pipe and cold rolled seamless pipe

cold drawn seamless tubing

It is to draw the metal pipe with a cold drawing machine without heating. The advantage is that it does not need to be carried out at high temperature. The disadvantage is that the residual stress is large, and it cannot be drawn too long. Cold drawing can improve toughness and tensile strength to obtain better mechanical properties.

Cold drawn seamless steel pipe process:

Round tube blank→heating→perforation→heading→annealing→pickling→multi-pass cold drawing→semi-finished pipe→heat treatment→straightening→hydraulic test (flaw detection)→marking→storage.

The difference between cold drawing and cold drawing:

Cold drawing and cold drawing are two different methods of metal cold working, and the two are not the same concept. Cold drawing refers to the method of applying tension to both ends of the metal material to cause the material to produce tensile deformation. Cold drawing refers to the method of applying a pulling force on one end of the material to make the material pull out through a die hole. The diameter of the die hole is smaller than the diameter of the material. The cold drawing process causes the material to have extrusion deformation in addition to the tensile deformation, and the cold drawing process is generally carried out on a special cold drawing machine. Materials that have been cold drawn have better properties than those that have been cold drawn.

Main application: For automobiles, motorcycles, refrigeration equipment, hydraulic parts, pneumatic cylinders, and other customers who have high requirements for steel pipe precision, smoothness, cleanliness, and mechanical properties.

Cold rolled precision seamless steel pipe

Finish-rolled pipe is also called cold-rolled precision steel pipe, which is a production process of seamless steel pipe.

Features of finish rolled tube:

1. The steel pipe dimension of cold-rolled precision steel pipe has high precision, and the product precision is controlled at ±0.05mm.

The inner and outer walls have good smoothness and no oxide layer on the surface.

2. The cold-rolled precision steel pipe has excellent overall performance, can withstand high pressure, and can be cold-bent, flared, and flattened without cracking or wrinkling, and can be subjected to various complex deformations and mechanical processing.

Article source: https://article-realm.com/article/Finance/32896-The-difference-between-cold-drawn-seamless-pipe-and-cold-rolled-seamless-pipe.html