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Home / Products / Alloy Steel Seamless Pipes / E235 Cold Drawn Seamless Tube for Hydraulic and Pneumatic Systems with Precision Seamless Construction
quality E235 Cold Drawn Seamless Tube for Hydraulic and Pneumatic Systems with Precision Seamless Construction factory
quality E235 Cold Drawn Seamless Tube for Hydraulic and Pneumatic Systems with Precision Seamless Construction factory
quality E235 Cold Drawn Seamless Tube for Hydraulic and Pneumatic Systems with Precision Seamless Construction factory

E235 Cold Drawn Seamless Tube for Hydraulic and Pneumatic Systems with Precision Seamless Construction

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seamless alloy steel tube

alloy steel seamless tubes

alloy steel pipe
Product Summary
E235 cold drawn seamless tubes offer high strength (235 MPa yield), excellent dimensional accuracy, and smooth surfaces. Ideal for hydraulic cylinders, automotive parts, and machinery. Seamless construction ensures reliability, with good machinability and weldability for cost-effective precision applications.

Product Details

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Cold Drawn E235 Tube

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Seamless Construction Alloy Steel Tube

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Hydraulic Systems Precision Steel Tube
Product Description
E235 Cold Drawn Seamless Tubes for Hydraulic and Pneumatic Power Systems E235+N
E235 cold drawn seamless tubes are precision steel tubes widely used in engineering, automotive, hydraulics, and general machinery where strength, dimensional accuracy, and surface quality are critical.
Understanding E235 Cold Drawn Seamless Tubes
  • E235: Non-alloy structural steel grade defined in EN 10305 with minimum yield strength of 235 MPa. Features good machinability and weldability.
  • Cold Drawn: Manufacturing process that improves dimensional accuracy, enhances surface finish, increases strength and hardness, and provides better straightness.
  • Seamless: Tube construction without welded seams, ensuring uniform mechanical properties and better performance under pressure and dynamic loads.
Key Properties and Advantages
Strength-to-Cost Ratio
Yield strength around 235 MPa with cost-effectiveness compared to alloy steels.
Dimensional Accuracy
Tight tolerances on outer diameter, inner diameter, and wall thickness with excellent straightness.
Surface Quality
Smooth internal and external surfaces ideal for sealing applications with hydraulic fittings.
Machinability & Weldability
Easy to cut, drill, turn, mill, thread, and weld using standard procedures.
Primary Applications
  • Hydraulic and Pneumatic Systems:
    • Hydraulic cylinder barrels with honed or skived & roller-burnished surfaces
    • High-pressure fluid and compressed air lines
  • Automotive and Transportation:
    • Steering and suspension components
    • Chassis and structural parts
  • Mechanical Engineering:
    • Shafts, sleeves, and bushings
    • Machine frames and structural components
    • Guide tubes and columns
  • Furniture and Architecture:
    • Office furniture frames and supports
    • Fitness equipment structures
    • Railings and architectural supports
Comparative Advantages
Alternative E235 Advantage
Welded Tubes No weld seam, better reliability, superior concentricity and surface quality
Hot-finished Seamless Tighter tolerances, better surface finish, more suitable for precision applications
Higher Alloy Steels More cost-effective, easier to work with, sufficient for standard applications
Practical Considerations
  • Tolerances: Specify according to EN 10305-1 standard requirements
  • Surface Condition: Select honed or pre-honed tubes for hydraulic applications
  • Heat Treatment: Choose appropriate delivery conditions (+C, +LC, +SR, +A) based on application needs
  • Corrosion Protection: Apply coatings or protective treatments for outdoor or corrosive environments
  • Forming: Use proper tooling and bending radii to avoid cracking or deformation
Ideal Application Scenarios
  • Precision bore tubes for hydraulic cylinders with minimal leakage
  • Accurate structural elements requiring minimal rework
  • Cost-effective mechanical parts where standard mild steel is insufficient but high-alloy steels are excessive

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