High Precision Cold Rolled Seamless Steel Tube

Applications:

High Precision Cold Rolled Seamless Steel Tube is used in automotive industry, and in the occasion where the high accuracy, brightness, cleanness of the tube are required.

Main Features:

1. Inner and outer walls of tube have high accuracy.
2. Excellent brightness.
3. No oxidization after heat treatment
4. High cleanness inside tube.

Quality Standards:

DIN 2391 Seamless Precison Steel Tubes

BS6323 Specification for Seamless and Welded Steel Tubes for Automobile, Mechanical and General Engineering Purposes

ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

Steel Grades:

DIN Standard: St35, St52
BS Standard: CFS 4, CFS 5, CFS 10
ASTM Standard: 1020, 1045, 4130

Chemical Composition(%):

Size Range:

Outer Diameter: 5mm-220mm
Wall Thickness: 0.5mm-25mm

Delivery Conditions:

+C (BK) Hard. No final treatment after final cold rolling.
+LC (BKW) Soft. Final heat treatment is followed by a suitable drawing pass (limited reduction of area).
+SR (BKS) Stress Relieved. After final cold rolling, the tubes are stress relieved in a controlled atmosphere.
+A (GBK) Annealed. After final cold rolling, the tubes are annealed in a controlled atmosphere.
+N (NBK) Normalized. After final cold rolling, the tubes are normalized in a controlled atmosphere.

Mechanical Properties( T=20°C if not differently stated ):

Package:

1. Bundle Packing.
2. Plain end or vanished as per customer’s request.
3. Wrapped in waterproof paper.
4. Sackcloth with several steel strips.
5. Pack in heavy tri-wall boxes.

Mill Test Certificate:

MTC is issued in accordance with EN 10204.