What are cold-drawn tubes?

Cold drawn seamless tubing possesses a high strength-to-weight ratio and can be processed to provide a combination of desired characteristics. Cold-drawn tubes are better than hot-drawn tubes to have uniform tolerances, increased strength and enhanced machinability. Since CDS or cold-drawn seamless mechanical tubing is at room temperature, the diameter and thickness are consistent throughout the drawn pipe.

Cold drawn seamless steel tubes process

What is the cold-drawn pipe manufacturing process?

Drawing uses force to elongate metal or other material to desired shape and thickness. When drawing gets done at room temperature, it is a cold drawing process, unlike heating required for the hot drawing process. Since heat is less than recrystallizing the metal or alloy, making a cold-drawn pipe needs more force. Hence cold, drawn pipes have more tensile strength and a smooth finish.

It is essential to piercing hot billets to make CDS tubing or cold-drawn seamless mechanical tubing, with subsequent rolling to reduce the diameter and elongate them. Then the material goes through a die or mandrel to make a precise gauge and shape of the pipe or tube.

What is the difference between cold-drawn and hot-rolled steel?

Steel, a staple for the world economy, revolutionized industries for over 170 years. Cold-drawn and hot-rolled are the two of its manufacturing process. The end steel products like pipes and tubes have different qualities. A few differences between cold-drawn seamless steel tubes and hot-rolled steel include the following.

  • Hot rolling steel involves high temperatures above 1700 F, a high recrystallization temperature, but cold-drawn steel is at room temperature.
  • Hot-rolled steel has a rough finish and is not as strong as cold-drawn steel to have many benefits for use in various sectors.

Cold drawn seamless pipes are seamless steel pipes with a circular cross-section made by cold drawing . Its name refers to the shape of steel pipes, such as thick-walled cold-drawn seamless pipes, thin-walled cold-drawn seamless pipes, etc. Cold drawn seamless pipes are widely used in the production of various structural parts, tools and mechanical parts. Compared with round pipes, cold drawn seamless pipes generally have larger moments of inertia and section modulus, have greater torsion resistance, save materials, and improve efficiency. They can be directly processed without deep processing in factories or mechanical processing plants. Use, reduce workload, improve work efficiency, and be loved by terminal demand.

Storage requirements for cold drawn seamless pipes

1. For the site or warehouse where seamless pipe products are stored, it should be selected in a clean and tidy place with unobstructed drainage, away from factories and mines with harmful gases or dust. Weeds and all debris should be wiped out on the ground to keep the seamless pipe tidy.
2. In the warehouse, it should not be stacked with materials that are corrosive to seamless pipes such as acid, alkali, salt, and sensitive soil. Different types of steel should be stacked separately to avoid confusion and avoid contact with corrosive objects
  3. Large steel pipes, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked in the open air
  4. Small and medium-sized steel bars, wire rods, steel bars, medium-diameter steel pipes, steel wires and wire ropes, etc., can be stored and placed in a shed with satisfactory ventilation, remember the upper and lower pads
  5. Small-scale steels, thin steel plates, steel strips, small-diameter or special-shaped steel pipes, various cold-rolled and cold-drawn steels, and expensive and corrosive metal products can be stored in the warehouse
  6. The warehouse should be selected according to the geographical conditions, and the ordinary closed warehouse is considered appropriate, that is, a warehouse with a roof, a fence, doors and windows, and a ventilation device.
  7. The warehouse is required to always maintain a suitable storage background, pay attention to ventilation in sunny days, and close it to prevent moisture in rainy days.