Cold Drawn Welded Steel Tube E255 Material Pipe EN10305-2

Material E255 Cold Drawn Welded Steel Tube DOM Pipe Standard EN10305-2

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Advantage (compare with seamless cold drawn tube)

Better shape

Improved quality surface

Tight Excentricity and wall thickness tolerances (the eccentric

Tube more safety

Good toughness at low temperature

USA Market: 90% of the cylinder in the USA market are produced with welded tubes

Cost fix Lengths More Cheaper

DOM is short of Drawn Over Mandrel, to produce specialty tubing, this procedure uses a drawbench to pull tubing, allowing excellent control of the inside diameter and wall thickness.

In technology, DOM is not a steel tube, but the completion of a stainless steel tube. It is considered to be of high quality. The first stage of manufacturing is the same as the phase used to make the resistance welded pipe, but in the finishing phase, the entire flash welding is removed and the tube is cooled on the heart axis. The cold stretching process provides better dimensional tolerances, improved surface finish and the most powerful welding strength. DOM is often mistakenly referred to as "seamless steel pipe" when the DOM actually does have a seam (though it is almost invisible).

Application:

Producing camshaft

Delivery Condition:

1) +C No heat treatment after the final cold drawing process
2) +LC After the final heat treatment there is a suitable drawing pass
3) +SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere
4) +A After the final cold drawing process the tubes are annealed in a controlled atmosphere
5) +N After the final cold drawing operation the tubes are normalized in a controlled atmosphere

Equipment