Jiangsu, China
Business Range:
Auto, Motorcycle Parts & Accessories, Construction & Decoration, Industrial Equipment & ...
Main Products:
Type of Ownership:
Limited Company
Management System Certification:
ISO 9001, ISO 9000
OEM/ODM Service
Sample Available

Seamless Steel Pipe, Honed Steel Pipe, Hydraulic Cylinder manufacturer / supplier in China, offering DIN2391-1 St52 Machined Honed Seamless Steel Tube for Hydraulic Cylinder, En10305-1 Cold Drawn Carbon Steel Pipe for Automobile Parts Use, S40c Seamless Steel Tubes /Machine Parts /Auto Parts and so on.

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Supplier Homepage Products Steel Pipe & Tube DIN2391-1 St52 Machined Honed Seamless Steel Tube for Hydraulic Cylinder

DIN2391-1 St52 Machined Honed Seamless Steel Tube for Hydraulic Cylinder

Min. Order / Reference FOB Price
1 Ton US $950-1,500/ Ton
Port: Tianjin, China
Production Capacity: 600 Tons Per Month
Payment Terms: L/C, T/T, Paypal, Money Gram
Type: Seamless
Technique: Cold Drawn
Material: Carbon Steel
Surface Treatment: Oiled
Usage: Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Construction & Decoration
Section Shape: Round

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Basic Info.

Model NO.
Steel Grade
St52; Ck20; Ck45; E355
Heat Treatment
+C +LC +Sr +a +N
Transport Package
Hexagon Woven Bags
HS Code
Changzhou Hongtai Precision Steel Pipe Co., Ltd belongs to Zhengzhou Hongtai Steel Pipe Group, specializing in international trading of steel pipes.Hongtai Group has 5 subsidiaries: Changzhou Hongtai Precision Steel Pry Co., Ltd, Zhengzhou Wantong Hongtai Steel Pipe Co., Ltd and Zhengzhou Huatong Steel Pipe Co., Ltd. We are the primary agent of Linzhou Fengbao Pipe Industry Co., Ltd.,Hubei Xinyegang Steel Co.,Ltd.,Baogang Group, TPCO. We also produce auotomobile and motorcycle precision steel pipes, oil cylinder precision steel pipes, honing precision steel pipes and SSAW pipes. The steel pipes also can be treated with anticorrosion and heat preservation as per customers' requirement.

Product Description
Outer diameter: 25mm -500mm 
Wall thickness: 2-50mm
Material: ST52, ST35, ST45
Standard: GB/T8713-88, GB/T3639-2009, DIN2391, EN10305
Honed tubes can be produced according to the demands of costumers that the degree of precision can reach H8/H9. Burnishing and honing service can be provided depending on the roughness requirement of inner diameter.

Material & Chemical Composition
 DIN2391 standard ST52, EN10305 standard E355, 16Mn, ASTM A106B, C20/20#, CK45
Product NameSt35 steel pipeSt45 steel pipeSt55  steel pipeSt52 steel pipe
chemical analysisC:≤0.18; P:≤0.05; S:≤0.05C:≤0.25; P:≤0.05; S:≤0.05C≈0.36; P:≤0.05; S:≤0.05C:≤0.20; Si≤0.55;Mn≤1.5;P:≤0.05; S:≤0.05
Tensile Strength+NBK,35-45MPa; +BK,≥45MPa;+BKW,≥38MPa;+GBK,≥32MPa+NBK,45-55MPa; +BK,≥55MPa;+BKW,≥48MPa;+GBK,≥40MPa+NBK,55-65MPa; +BK,≥65MPa; +GBK,≥50MPa+BK,≥60MPa;+BKW,≥55MPa;
Yield strength+NBK,≥24M
LengthAs customer's request
PackagingStandard export packing, packed in woven bags, with two nylon slings, or can be customized as request
Heat Treatment/      Delivery ConditionCold finished (hard)   BK(+C)
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
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)
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.
Annealed    GBK(+A)
The last Cold forming process is followed by annealing in a controlled atmosphere.
Normalized   NBK(+N)
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
Delivery TimeWithin 35-50 days from receiving deposit
Payment Term100% L/C at sight or 30% deposit, 70% balance against copy of B/L
Usage/ApplicationPipes for automobile and motorcycle
Main MarketAsia, Middle East, Europe, etc.

Dimension tolerance
Inner Dia (mm)ID Tolerance (mm)WT Tolerance (mm)

Product description
Processing FormI. DLengthStraightnessI. D ToleranceI. D Rounghness
Cold-rolled30-100≤ 12M0.3-1.0H8-H100.4-1.6
Cold-drawn30-250≤ 12M0.3-1.0 0.8-1.6
Hone40-500≤ 12M1000H8-H90.4-0.8
SRB40-400≤ 7M1000H8-H90.1-0.4

DIN2391-1 St52 Machined Honed Seamless Steel Tube for Hydraulic Cylinder

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