8 - 20um St37 , St45 , St52 Cold Drawn Seamless Din 1629 Tube For Pneumatic Lines manufacturer from China Tianjin LANG Steel Pipe Manufacturing Co., Ltd.

8 - 20um St37 , St45 , St52 Cold Drawn Seamless Din 1629 Tube For Pneumatic Lines

Place of Origin:

Tianjin, China (Mainland)


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8 - 20um St37 , St45 , St52 Cold Drawn S

8 - 20um St37 , St45 , St52 Cold Drawn Seamless Din 1629 Tube For Pneumatic Lines

Specifications

din 1629 tube
Cold drawn precision seamless steel tube
Circular unalloy steel tube
st37, st45, st52

Circular unalloy steel DIN 1629 tube

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	10305-4	E215/235/355/255 26Mn 5 C35E C45E 20V1 (E410) 26Mo2 25CrMo4 42CrMo4
GB	3639	10#, 20#, 16Mn, 45#
ASTM	A 519	1010 1020 1035
BS	BS 6323	CFS3 CFS4 CFS5 CFS6 CFS7
NFA	49310	TU 37 b TU 52 XC

Delivery conditions:

Precision tubes are delivered in following conditions

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: 100% eddy current test, chemical and mechanical inspection, size checking and others

Certificates: according to EN 10204 3.1

Packing: Bundles or boxes

SURFACE TREATMENTS

1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface 0.2Ra

Maximum for special requirement

2. Surface Coating

A. Silver galvanized

B. Yellow galvanized

C. Olive green coated

Layer thickness: 8-20um, Salty Spray Test: 48-15