Cold rolled technique of DIN St52-3 Carbon Welded Steel Tube

Grades	Delivery conditions	Tensile strength Rm(Mpa)	Yield strength Rm(Mpa)	Elongation in the longitudinal firection AI (%)
St52-3	+C	540 min	/	5 min
St52-3	+A	490 min	/	22 min
St52-3	+N	490-630	355 min	22 min

St52-3 Sizes Range

OD: 18mm-230mm, WT: 1.5mm-15mm

St52-3 Tolerance of Dimensions

Inner Diameter: H9 H10

Inner Surface Roughness: Ra 0.80μ max

Eccentricity: 3% max

St52-3 Delivery Conditions:

+C Hard. No final treatment after final cold drawing.

+LC Soft. Final heat treatment is followed by a suitable drawing pass (limited reduction of area).

+SR Stress Relieved. After final cold drawing, the tubes are stress relieved in a controlled atmosphere.

+A Annealed. After final cold drawing, the tubes are annealed in a controlled atmosphere.

+N Normalized. After final cold drawing, the tubes are normalized in a controlled atmosphere.

 St52-3 Process:

The cold drawn welded tube is produced by drawing ERW (electric resistance welded tube) through a die and over a mandrel plug. During this process the sizing (wall thickness, inside and outside diameter), as well as weld integrity and surface finish is closely controlled to produce tube of the required size and mechanical property characteristics.

St52-3 Tube Finishing Options:

Our tubes can be additionally treated to achieve the exact finishes and ends needed by customers. These are some of the additional operations that can be performed on our tube: Drawing, Heat treatment, Bulging, Swaging, Cutting, Deburring, Vibro cleaning, Threading, De-rusting, Chamfering, And Washing.

If you have any problem, please contact Bebon Steel freely. We will supply top quality St52-3 and competitive price of our goods.