How do you demagnetize the seamless alloy steel pipe?

Answer 1

Demagnetizing ProcessThe procedure for demagnetizing (also known as degaussing) a piece of steel consists of repeatedly applying a reversing, gradually reduced and imposed magnetic force.

Heating a piece of magnetized iron or steel to above the austenitic transformation temperature (above the Curie temperature) will remove any magnetism

Answer 2

By turn a cable a number of turns around the pipe. A DC current flowing through the coil will generate an electrical magnet to oppose the residual magnet in the pipe. if not work, may be you need to increase the number of turns or to reverse the DC current flow.

Answer 3

The only methods for demagnetization that I have seen work include heat treatment and magnetic induction. Heat treatment can be performed with electric resistance coils or an oxy-fuel torch, heating the pipe to a dull cherry red and holding it at that temperature for several minutes, then allowing to cool to ambient over a long period of time. The other method is usually effective and much simpler and does not affect the metallurgical integrity of the pipe as heat input can. This method includes taking the positive welding lead and coiling it around the pipe near the joint to be welded. Several coils should be made tight to the pipe and each other, then induce current through the lead by welding for a few minutes on a piece of scrap or something just to allow current flow through the coiled welding cable. You are essentially turning the pipe into a big electromagnet by doing this. If it doesn't work the first time, try reversing the direction that the lead is coiled around the pipe and induce currrent flow again. More often than not, this will demagnetize the pipe enough so that the weld can be made. (Uncoil the leads from around the pipe before making the pipe weld)

Answer 4

To demagnetize a seamless alloy steel pipe, you can pass an alternating current through it or subject it to a vibrational or impact treatment to disrupt the alignment of magnetic domains within the material, effectively removing the magnetism. Specialized demagnetizing equipment or techniques may be required depending on the size and composition of the pipe.