DIN 2391 ST35 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(%):

 

Grade	C	Si	Mn	P	S	Cr	Mo
St 35 (DIN1.0308)	0.17 max	0.35 max	0.40 min	0.025 max	0.025 max	/	/

 

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 ):

 

Grades	Delivery Conditions	Tensile Strength Rm (Mpa)	Yield Strength R2 (Mpa)	Elongation in the longitudinal direction Al (%)
St 35	+C (BK)	480 min	/	6 min
St 35	+LC (BKW)	420 min	/	10 min
St 35	+SR (BKS)	420 min	315 min	14 min
St 35	+A (GBK)	315 min	/	25 min
St 35	+N (NBK)	340-470	235 min	25 min

 

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.

Contact us:

Hunan Fushun Metal Co., Ltd.

Add:Room 1506, Building 37th, Zhongcheng Lijing Xiangshan, No. 239, 2th part of Wanjiali Middle Road, Changsha, Hunan, China

Tel: +86-731-89903933

Fax:+86-731-89853933

Email:Harris@fushunsteeltube.com

Web:http://www.fushunsteeltube.com/

Skype:harrislee94