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  • ST52 DIN 2391 Seamless Hydraulic Pipe Material
  • ST52 DIN 2391 Seamless Hydraulic Pipe Material
  • ST52 DIN 2391 Seamless Hydraulic Pipe Material
ST52 DIN 2391 Seamless Hydraulic Pipe MaterialST52 DIN 2391 Seamless Hydraulic Pipe MaterialST52 DIN 2391 Seamless Hydraulic Pipe Material

ST52 DIN 2391 Seamless Hydraulic Pipe Material

  • I.D. Range: 26-800mm
  • Tolerance: ISO H8
  • Straightness: 1/1000mm
  • Material: C20, E355, ST52, 25Mn
  • Product description: 15+years professional manufacturer & supplier of Honed tubes, Chrome plated rods. experience in Vietnam, Thailand, Brazil, Egypt, Saudi Arabia, UAE, Russia, Singapore market.
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professional manufacturer specialized in hydraulic and pneumatic products.
We provide
Design, Produce, Machining and Service since 2004.

Specefication

Standard: DIN2391, EN 10305, JIS G3445, ASTM A519, GB/T 8713…

Material: ST45, ST52, E355, E355SR, STKM13C, SAE 1026, 20#, Q235B, CK45…

Heat treatment: BK+S

Specification: Out diameter: 20-800mm, Inner diameter: 40-250mm

I.D Tolerance: H7-H8

Length: 3-13m (Customers usually choose the 4-5.8m)

Straightness: 1/1000

ID roughness: RA 0.8-1.6 micron (max)

Technology: Cold drawn

Scope: honed tube for hydraulic cylinder, swivel crane, injection machine and construction machine application



Chemical Composition

Chemical Composition (%)

Steel Grade

C

Si

Mn

P

S

Cr

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

St52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE 1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27 SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250


Mechanical Properties

Delivery Condition

Cold drawn + stress-relieved (BK+S) (SR)

Cold fished (hard) (BK)

Steel Grade

Tensile strength (Rm Mpa)

Yield strength

Elogation A5%

Tensile strength (Rm Mpa)

Elogation A5%

20#

≥520

≥375

≥15

≥550

≥8

45#

≥600

≥520

≥10

≥640

≥5

E355(Q345B, St52)

≥600

≥520

≥14

≥640

≥5

25Mn

≥600

≥510

≥15

≥640

≥5

27SiMn

≥760

≥610

≥10

≥800

≥5


Tolerance


Inner diameter

Inner diameter tolerance

H8

H9

30

+0.033

0

+0.052

0

>30-50

+0.039

0

+0.062

0

>50-80

+0.046

0

+0.074

0

>80-120

+0.054

0

+0.087

0

>120-180

+0.063

0

+0.100

0

>180-250

+0.072

0

+0.115

0

>250-315

+0.081

0

+0.130

0

>315-400

+0.089

0

+0.140

0





Our main business range is listed as follows:

Carbon Seamless Steel pipe/tube

Hydraulic cylinder tube (honed tube)

Hard chrome plated rod/bar/shaft (Piston rod)

We sincerely welcome friends from all over the world contact us to establish mutually beneficial business relationships.




About Us

Established in 2004, reowned firm engrossed in manufacturing honed tube, chrome rod over 14years. ISO9001 certificated.

Annual output 12 thousand tons, at present we are the biggest manufacturer in North China.

Rich experience in production and export, prefect products & services gained recognition of clients from 40 countries & area.


Advantage
>15+years professional manufacturer & supplier of honed tube, Chrome plated rod.
>Experience in Vietnam, Thailand, Brazil, Egypt, Saudi Arabia, UAE, Russia, Singapore market.
>ISO9001:2008, SGS, BV, CNAS Certificated.
>Biggest manufacturer & wholesaler in local market.
>7*24 at your service, on time respond.
>One-stop collection.


Contact Us

Contact: Dooharvest

Phone: +86 186 6128 5080

Tel: +86 186 6128 5080

Add: Economic Development Zones Huishan, Wuxi, Jiangsu, China