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Tianjin LANG Steel Pipe Manufacturing Co., Ltd.  

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Yellow / Olive Green Coated DIN1629 ST37 ST44 ST52 Cold Drawn Seamless Tube 

Place of Origin: Tianjin, China (Mainland) 
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Yellow / Olive Green Coated DIN1629 ST37 ST44 S

Yellow / Olive Green Coated DIN1629 ST37 ST44 ST52 Cold Drawn Seamless Tube


Specifications

DIN1629 ST37 ST44 ST52 cold drawn precision seamless steel tube and pipe
Precision in size, bright in surface



DIN1629  ST37 ST44 ST52 cold drawn precision seamless steel tube and pipe
Production range: OD from 3.75mm to 70mm; wall thickness up to 10mm Steel grades:Standard Tubes

StandardsTDR StandardsSteel GradesDIN1629
1630
2391-2
17204
17210
ST 37 / 44 / 52
ST 37.4 / 44.4 / 52.4
ST 35 /  45 / 52
C22 – Ck 22 – Cm22 –
C35 – Ck 35 – Cm 35
C45 -  Ck 45 – Cm 45 – 34 CrMo4
C15 – Ck 15 – Cm 15 – 16MnCr5

EN10305-1E215/235/355/255
26Mn 5
C35E
C45E
20V1 (E410)
26Mo2
25CrMo4
42CrMo4

ASTMA 5191010
1020
1035
BSBS 6323CFS3
CFS4
CFS5
CFS6
CFS7
NFA49310TU 37 b
TU 52  XC
 Many other steel grades and customized – modified steel grades are available on request
Delivery conditions:  Precision tubes are delivered in following conditions (first symbol lists previous 

designation, the new one according to EN is in brackets):
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked).
After last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized.
After the final cold forming process the tubes are annealed above the upper transformation point in a

 controlled atmosphere.
 Tests: all tubes are checked according to the relevant production standard;supplementary/optional tests 
are available on request; chemical mechanical and   technological tests are made according to relevant 
standard
 Certificates: according to EN 10204 3.1 
Packed in bundles or boxes 
Table 1- Chemical composition Steel GradeC%Si%Mn%P%S%St35 or  E235≤0.17≤0.350.4-1.2≤0.025≤0.025St45 or E255≤0.21≤0.350.4-1.1≤0.025≤0.025St52 or E355≤0.22≤0.55

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Tel: 86-22-2646578
Fax: 86-22-2646578
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Company Info

Tianjin LANG Steel Pipe Manufacturing Co., Ltd. [China (Mainland)]


Business Type:Manufacturer
City: Tianjin
Province/State: Tianjin
Country/Region: China (Mainland)

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