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High Strength Bright Annealed Tube Seamless DIN2391 For Pneumatic Parts

Place of Origin China
Brand Name Hongbao
Certification TS16949, ISO9001, OHSAS18001 etc.
Model Number HB-TI
Minimum Order Quantity 1 ton
Price Negotiable
Packaging Details Seaworthy Wooden box, customized Packing
Delivery Time 30 Days
Supply Ability 60000 MT per Year

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Product Details
Material E235, E355 Shape Round
Application Automotive Part,Camshaft Etc. Delivery Condition +C,+N
Keywrds Bright Annealed Tube Port Shanghai Port
High Light

carbon steel pipe


st52 honed tube

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Product Description

DIN2391 Seamless Precision Bright Annealed Tubes For Hydraulic And Pneumatic Parts



Benefits of Round Cold drawn Seamless Mechanical Tubing:

  • Smooth surface
  • Dimensional accuracy and excellent micro-structure uniformity
  • Enhanced machinability
  • High strength to weight ratio
  • Tight tolerances, resulting in reduced machine time
  • Cross-sectional shape: Round, oval, square, hexagon, octagon, plum blossom, etc
  • Applications: hydraulic cylinders, rollers, structural apps, truck and automotive parts

Standard: ASTM A519 DIN 2391 EN 10305


Grade: ASTM 1010/1018/1020/1026/1030/1035/1045/4130/4135/4140/5120/5140/52100/8620/4340

DIN ST30AL/ST35/ST45/ST52/CK22/CK35/CK45/41Cr4/25CrMo4/30CrMo4/34CrMo4/42CrMo4/16MnCr5 ETC.

EN E215/E235/E355 etc


Size: Outer diameter: 6-426 mm

Wall thickness: 0.5-40 mm

Length: not more than 12000 mm



High Precision Tube is used in automotive industry, and in the occasion where the high accuracy, brightness, cleanness of the tube are required.

Process: Cold Drawn, Cold Rolled, honin, skiving, Hot rolled+Cold Drawn.

Standard: DIN2391. EN10305-1. GB3639. ASTM A519, EN 10297 etc.

Chemical requirements:

Steel Grade(%) C Si Mn P S
E235(1.0308) ≤0.17 ≤0.35 ≤1.20 ≤0.025 ≤0.025


Outer Diameter: 30-450 mm

Wall Thickness: 2-40 mm

Length Random Length, Fixed Length, etc.

Dimension tolerance

I.D tolerance (mm) O.D tolerance (mm) I.D Roughness (µm) Straightness (mm/meter)
H7-H9 -/+0.5% 0.10-0.80 0.2-0.80

Delivery Condition: Cold drawn, Cold rolled, Stress Relieved, Annealed( Bright Annealed, Spheroidize Annealed), Normalized, Quenched and Tempered.

Surface: Black, Smooth, Bright.

High Strength Bright Annealed Tube Seamless DIN2391 For Pneumatic Parts 0