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Changzhou Hongtai Precision Steel Pipe Co., Ltd.

Seamless Steel Pipe, Steel Pipe, Seamless Steel Tube manufacturer / supplier in China, offering En10305-1 Shock Absorber Precision Seamless Steel Pipe for Boiler, JIS G3445 Cold Drawn Steel Pipe for Automobile and Motorcycle, Cold Drawn Precision Seamless Steel Pipe for Mechanical Processing and so on.

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En10305-1 Shock Absorber Precision Seamless Steel Pipe for Boiler

FOB Price: US $500-900 / Ton
Min. Order: 1 Ton
Min. Order FOB Price
1 Ton US $500-900/ Ton
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Port: Shanghai, China
Production Capacity: 600 Tons Per Month
Payment Terms: L/C, T/T

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Product Catalog
Boiler Steel Pipe
8 Products
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Product Name
FOB Price
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Product Package
Product Attribute
Product Table
Basic Info
  • Model NO.: HTSP EN10305
  • Technique: Cold Rolled
  • Surface Treatment: Oiled
  • Section Shape: Round
  • Standard: DIN 2391, En 10305
  • Delivery Time: 30-45 Days
  • Certification: ISO,BV ,SGS
  • Trademark: HTSP
  • Specification: 6-68MM
  • HS Code: 7304391000
  • Type: Seamless
  • Material: Carbon Steel
  • Usage: Hydraulic/Automobile Pipe
  • Steel Grade: St52; Ck20; Ck45; E355
  • Length: Customized Length
  • Delivery Condition: Bk, Bks,Nbk,
  • Thickness: 0.5-20mm
  • Transport Package: Woven Bags
  • Origin: Changzhou, China
Product Description
Product Description

Outer diameter: 25mm -500mm 

Wall thickness: 2-50mm

Material: ST52, Q345B, CK20, CK45, SAE1026

Standard: GB/T8713-88, GB/T3639-2009, DIN2391, EN10305

Material & Chemical Composition
 DIN2391 standard ST52, EN10305 standard E355, 16Mn, ASTM A106B, C20/20#, CK45

Product Name

E215 steel pipe

E235 steel pipe

E355  steel pipe

chemical analysis

C: 0.10;Si: 0.05;Mn: 0.70;P: 0.025; S: 0.025;Al: 0.025

C: 0.17;Si: 0.35;Mn: 1.20;P: 0.025; S: 0.025

C: 0.22;Si: 0.55;Mn: 1.60;P: 0.025; S: 0.025

Tensile Strength

+C, 430MPa; +LC, 380MPa;+SR, 380MPa;+A, 280MPa;+N,290-430MPa

+C, 480MPa; +LC, 420MPa;+SR, 420MPa;+A, 315MPa;+N, 340-480MPa

+C, 640MPa; +LC, 580MPa;+SR, 580MPa;+A, 450MPa;+N,490-630MPa

Yield strength

+SR, 280MPa; +N, 215MPa

+SR, 350MPa;

+N, 235MPa

+SR, 450MPa; +N, 355MPa




As customer s request


Standard export packing, packed in woven bags, with two nylon slings, or can be customized as request

Heat Treatment/      Delivery Condition

  1. Cold finished (hard)   BK(+C)

Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation

  1. Cold finished (soft)    BKW(+LC)

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)

  1. Cold finished and stress-relieved annealing BKS(+SR)

Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

  1. Annealed    GBK(+A)

The last Cold forming process is followed by annealing in a controlled atmosphere.

  1. Normalized   NBK(+N)

The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Delivery Time

Within 35-50 days from receiving deposit

Payment Term

100% L/C at sight or 30% deposit, 70% balance against copy of B/L


Pipes for automobile and motorcycle

Main Market

Asia, Middle East, Europe, etc.


En10305-1 Shock Absorber Precision Seamless Steel Pipe for Boiler

En10305-1 Shock Absorber Precision Seamless Steel Pipe for Boiler

En10305-1 Shock Absorber Precision Seamless Steel Pipe for Boiler


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