ASTM A269 Austenitic Stainless Steel Coil Tube — Seamless & Welded General Purpose
Product Overview
ASTM A269 austenitic stainless steel coil tube represents the industry benchmark for general-purpose tubular products in international commerce. Manufactured by Wenzhou Jixing Metal Materials Co., Ltd, this product line encompasses both seamless and welded austenitic stainless steel tubing supplied in coil form, designed to meet the rigorous requirements of ASTM A269/A269M — the most widely referenced general standard in global stainless steel tube trade. Available in a comprehensive range of austenitic grades including 304, 304L, 316, 316L, 321, and 310, these coil tubes deliver exceptional corrosion resistance, mechanical integrity, and formability across an extraordinarily broad spectrum of industrial applications.
Material & Properties
ASTM A269 covers a full family of austenitic stainless steel compositions characterized by their non-magnetic or weakly magnetic properties, excellent weldability, and outstanding resistance to intergranular corrosion and stress corrosion cracking. Key material characteristics include:
- Corrosion Resistance: Superior resistance to atmospheric corrosion, acidic and alkaline environments, and chlorinated solutions (particularly in 316/316L grades)
- Mechanical Strength: High tensile strength and yield strength with excellent elongation properties ensuring reliable performance under dynamic loading conditions
- Formability: Outstanding cold-working capability enabling seamless bending, forming, and shaping without cracking or loss of integrity
- Temperature Performance: Maintains structural stability from cryogenic temperatures up to 870°C (1600°F) with enhanced creep resistance in stabilized grades
- Hygienic Surface: Available in annealed, pickled, polished, and electropolished finishes suitable for food-grade and pharmaceutical processing
Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A269 / A269M |
| Product Form | Coil Tube (Continuous Coil) |
| Manufacturing Method | Seamless & Welded (ERW, TIG, MIG) |
| Material Grades | 304, 304L, 316, 316L, 321, 347, 310, 904L, Custom |
| Outer Diameter | 1/8" – 6" (3.2 mm – 152.4 mm) |
| Wall Thickness | 0.3 mm – 6.0 mm (0.012" – 0.236") |
| Surface Finish | 2B, BA (Bright Annealed), Pickled & Passivated, Polished (180#–400#), Electropolished |
| End Condition | Plain, Beveled, Threaded, Custom |
| Coil Weight | 500 kg – 2,000 kg (adjustable per customer requirement) |
| Tolerance (OD) | ±0.03" or ±0.5% (per ASTM A269) |
| Tolerance (Wall) | ±10% (per ASTM A269) |
| Heat Treatment | Annealed, Solution Treated, Stress Relieved |
| Testing | Hydrostatic Test, Eddy Current, Ultrasonic, Spectroscopic Analysis |
Manufacturing Process
Wenzhou Jixing Metal Materials Co., Ltd employs a fully integrated manufacturing process to ensure ASTM A269 compliance at every stage of production:
- Raw Material Selection: Only certified austenitic stainless steel billets and strip from reputable mills are procured, with full chemical composition verification via optical emission spectrometry (OES).
- Piercing & Hot Rolling (Seamless): Solid billets are heated and pierced to form hollow tubes, subsequently hot-rolled to approximate dimensions.
- ERW/Welded Forming: Precision cold-rolled strip is formed into tube shape and welded using submerged arc, resistance, or gas tungsten arc welding processes with full seam inspection.
- Pilgering & Cold Drawing: Tubes are pilgered and cold-drawn through precision dies to achieve exact dimensional tolerances and enhanced mechanical properties.
- Heat Treatment: Solution annealing at 1040°C–1150°C followed by controlled cooling or quenching to restore full austenitic microstructure and maximize corrosion resistance.
- Surface Finishing: Acid pickling and passivation remove scale and contamination; mechanical or electrolytic polishing achieves specified surface roughness.
- Coiling: Finished tube is wound into coils of specified diameter and weight on precision coiling equipment with protective end caps.
- Quality Inspection: Every coil undergoes hydrostatic pressure testing, dimensional verification, surface inspection, and chemical/spectral analysis prior to shipment.
Applications
ASTM A269 coil tubes are the universal choice for applications demanding corrosion resistance, hygiene, and dimensional precision:
- Food & Beverage Processing: Dairy equipment, brewing systems, CIP/UHP piping, sanitary transfer lines, and processing vessels
- Pharmaceutical & Medical: Drug manufacturing systems, medical device tubing, laboratory instrumentation, and cleanroom installations
- Chemical Processing: Acid and alkali transport, reactor internals, heat exchanger bundles, and corrosive fluid handling systems
- Automotive & Aerospace: Exhaust systems, fuel lines, turbocharger components, and structural tubing
- Architecture & Construction: Decorative railings, handrails, structural supports, and architectural features
- Energy & Power Generation: Solar thermal collectors, geothermal systems, boiler feedwater lines, and nuclear applications
- General Engineering: Hydraulic systems, pneumatic tubing, fluid transfer, and OEM component fabrication
Quality Certifications
Wenzhou Jixing Metal Materials Co., Ltd maintains a comprehensive quality assurance framework ensuring every ASTM A269 coil tube meets international standards:
- ISO 9001:2015 — Quality Management System certification covering full production lifecycle
- ISO 14001 — Environmental Management System for sustainable manufacturing practices
- ISO 45001 — Occupational Health and Safety Management
- ASTM A269/A269M Compliance — Full dimensional, mechanical, and chemical compliance with third-party verification
- MTC (Mill Test Certificate) — EN 10204 Type 3.1 certificates provided with every shipment
- Third-Party Inspection — Available upon request from SGS, BV, or TÜV for pre-shipment verification
- Material Traceability — Full heat-number traceability from raw material to finished coil
Why Choose Wenzhou Jixing Metal Materials Co., Ltd? As a specialist manufacturer of ASTM A269 austenitic stainless steel coil tubes, we combine state-of-the-art manufacturing technology with rigorous quality control to deliver products that meet the most demanding international specifications. Our coil tubes are the most widely referenced general standard in global trade — trusted by OEMs, fabricators, and end-users worldwide for uncompromising performance, consistent quality, and competitive value.