Cold-Drawn Stainless Steel Precision Tube – ASTM A269 TP316L, 100*2

Cold-Drawn Stainless Steel Precision Tube – ASTM A269 TP304, TP316L (100 mm OD x 2 mm WT & More Sizes)

Overview

Discover our Cold-Drawn Stainless Steel Precision Tubes, engineered to ASTM A269 standards in grades TP304 and TP316L. Available in sizes ranging from 6 mm to 323.9 mm outer diameter (OD) and 0.5 mm to 20 mm wall thickness (WT), including the popular 100 mm OD x 2 mm WT, these tubes offer superior corrosion resistance, tight tolerances, and exceptional surface finish. Ideal for chemical processing, pharmaceuticals, marine, and food industries, our tubes ensurereliability and performance.

Manufacturing Process

Our ASTM A269 precision tubes are crafted through a meticulous cold-drawing process, ensuring high quality and precision:

1.Hot Forming: Seamless stainless steel tubes are formed by hot extrusion or piercing, creating a robust base material.
2.Cold Drawing: Tubes are drawn through a die and over a mandrel at room temperature, achieving precise dimensions and a smooth surface.
3.Annealing: Solution annealing restores ductility, enhances corrosion resistance, and relieves internal stresses.
4.Surface Finishing: Polished or bright-annealed finishes ensure a clean, aesthetic surface suitable for sanitary and high-purity applications.
5.Quality Testing: Rigorous inspections, including dimensional checks, hydrostatic testing, and non-destructive testing (NDT), ensure compliance with ASTM A269 standards.

This process delivers tubes with tight tolerances, excellent corrosion resistance, and a refined microstructure for critical applications.

Material Grades

Our precision tubes are available in grades TP304 and TP316L, each optimized for specific applications:
Chemical Composition Comparison (Max % unless specified)

Mechanical Properties Comparison (Annealed)

Delivery Conditions

·Solution Annealed (SA): Tubes are heat-treated at 1040–1150°C and rapidly cooled to restore ductility, enhance corrosion resistance, and eliminate residual stresses. This is the standard condition for ASTM A269 tubes, ensuring optimal mechanical properties for cylinders and rollers.
·Bright Annealed (BA): Tubes are annealed in a controlled atmosphere (e.g., hydrogen) to produce a bright, reflective surface. This condition is ideal for sanitary applications (e.g., food processing conveyor rollers) or aesthetic components, maintaining similar mechanical properties to solution annealing.
·Pickled: Tubes are chemically treated to remove scale and impurities, resulting in a matte finish. This condition is suitable for applications where corrosion resistance is critical but a polished surface is not required (e.g., hydraulic cylinders in chemical plants).
·Polished: Tubes undergo mechanical polishing (e.g., to 180–320 grit) for a smooth, mirror-like finish, ideal for high-purity or decorative applications. Mechanical properties remain consistent with solution-annealed conditions, but surface smoothness enhances performance in conveyor rollers.

 Grade Descriptions

·TP304 (ASTM A269): An austenitic stainless steel with excellent corrosion resistance and formability, ideal for general-purpose applications in food processing, chemical, and architectural industries. Its higher carbon content (compared to TP316L) offers slightly better strength.

·TP316L (ASTM A269): A low-carbon, molybdenum-alloyed austenitic stainless steel, offering superior corrosion resistance in chloride-rich environments. Its low carbon content minimizes carbide precipitation during welding, making it perfect for pharmaceutical, marine, and chemical applications.

Specifications

·Standard: ASTM A269 (Seamless and Welded Austenitic Stainless Steel Tubing for General Service)
·Size Range:
·Outer Diameter (OD): 6 mm to 323.9 mm (e.g., 100 mm OD as a common size)
·Wall Thickness (WT): 0.5 mm to 20 mm
·Length: Random (1,000–12,000 mm) or custom-cut
·Tolerances (per ASTM A269):
·OD: ±0.3% or ±0.10 mm (whichever is greater)
·WT: ±3%
·Length: ±0.5 mm (for cut lengths)
·Delivery Conditions:
·Solution Annealed
·Pickled or Bright Annealed
·Surface Conditions: Polished, bright-annealed, or pickled for corrosion resistance and aesthetic appeal.

Key Benefits

·Superior Corrosion Resistance: TP304 offers excellent general corrosion resistance, while TP316L excels in chloride-rich environments due to molybdenum content.
·High Precision: Cold-drawn process ensures tight tolerances for precise applications.
·Smooth Surface Finish: Bright-annealed or polished surfaces meet sanitary requirements and reduce contamination risks.
·Weldability: Low carbon content in TP316L and controlled composition in TP304 ensure reliable welds.
·Versatile Size Range: Sizes from 6 mm to 323.9 mm OD and 0.5 mm to 20 mm WT cater to diverse industry needs.
·Durability: High strength and toughness ensure long service life in demanding conditions.

Applications

ASTM A269 TP304 and TP316L precision tubes are used in:

·Hydraulic and Pneumatic Cylinders: Barrels for pistons in construction equipment, automation systems, or marine applications (TP316L for corrosive fluids).
·Conveyor Rollers: Outer shells for rollers in food processing (TP304 for hygiene), pharmaceuticals, logistics, or chemical plants (TP316L for corrosion resistance).
·Chemical Processing: Piping for corrosive fluids, heat exchangers, and reactors.
·Pharmaceuticals: Sanitary tubing for high-purity systems.
·Marine: Components exposed to seawater, such as fittings (TP316L).
·Food and Beverage: Hygienic tubing for processing equipment (TP304).
·Oil and Gas: Instrumentation and control lines in corrosive environments.
·Architectural: Decorative and structural components (TP304).

Quality Assurance

All TP304 and TP316L precision tubes comply with ASTM A269 standards. Test certificates per DIN EN 10204 3.1 are provided, verifying chemical composition, mechanical properties, and dimensional accuracy. Additional tests, such as eddy current testing, hydrostatic testing, and surface inspections, ensure reliability and performance.

Why Choose Our Precision Tubes?

·Tailored Solutions: Custom sizes (6 mm to 323.9 mm OD, 0.5 mm to 20 mm WT) and finishes to meet your project needs.
·Global Standards Compliance: Manufactured to ASTM A269 for consistent quality.
·Reliable Supply Chain: Stocked in standard sizes and custom options.
·Expert Support: Our team provides technical guidance to select the ideal grade and size for your application.

For more information or to request a quote, contact us at hongli-jy@126.com or visit hltube.com. Elevate your projects with high-quality ASTM A269 TP304 and TP316L Cold-Drawn Stainless Steel Precision Tubes.