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Tianjin LANG Steel Pipe Manufacturing Co., Ltd.

[Province: Tianjin ]

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EN 10305 - 4 Cold Drawn Seamless Steel Tube For Automobile And Hydraulic System

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EN 10305 - 4 Cold Drawn Seamless Steel Tube For Automobile And Hydraulic System

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EN 10305 - 4 Cold Drawn Seamless Steel Tube For Automobile And Hydraulic System

Specifications

tube E235 for EN10305-1 or EN 10305-4 cold drawn seamless steel tube for automobile and hydraulic system +C, +LC, +SR, +N

Tube E235 for EN10305-1 or EN 10305-4 cold drawn seamless steel tube for automobile and hydraulic system

Production range: OD from 3.75mm to 70mm; wall thickness up to 10mm

Steel grades:

Standard Tubes
Standards	TDR Standards	Steel Grades
DIN	1629 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
EN	10305-1	E215/235/355/255 26Mn 5 C35E C45E 20V1 (E410) 26Mo2 25CrMo4 42CrMo4
ASTM	A 519	1010 1020 1035
BS	BS 6323	CFS3 CFS4 CFS5 CFS6 CFS7
NFA	49310	TU 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 Grade

Si%

Mn%

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