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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
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