304l stainless steel tube
2. Standard: ASTM A269, ASTM A213, engineered for precise dimensional and engineering tolerances
3. Process: High-precision multi-pass cold drawing or cold rolling to ensure a perfectly smooth internal bore
4. Size Range: Outer Diameter from 6mm to 159mm with exact customized thin-to-medium wall thickness profiles
5. Heat Treatment: Full solution annealing in a vacuum furnace to eliminate any structural cold-work hardening
6. Surface Finish: Bright annealed (BA) mirror finish, acid pickled, or high-purity chemically passivated
7. Application: High-purity gas distribution lines, laboratory instrumentation, heat exchangers, and fluid controls
8. Service Advantage: Flexible small-batch production, custom cut-to-length services, and 100% eddy current testing
9. Packaging: Each tube individually plastic-sleeved and securely packed in reinforced export plywood crates
10. Key Advantage: Effectively restricts chromium carbide precipitation during welding to maintain absolute joint integrity
304L Stainless Steel Tube – Low-Carbon Welded Solutions for Corrosion-Critical Industrial Systems
Hebei All Trust Steel Co., Ltd specializes in manufacturing high-integrity 304l stainless steel tube engineered with extra-low carbon metallurgy to eliminate intergranular corrosion risks in welded assemblies. Our tubes are manufactured to ASTM A269 and ASTM A213 standards with a yearly capacity of over 15,000 tons and a 100% hydraulic testing rate, with precise cold drawn tolerances of ±0.05 mm. Every batch thorough eddy current testing and solution annealing in controlled environment furnaces ensures leak-proof performance for instruments, heat exchangers and fluid control systems in chemical, pharmaceutical and maritime applications.
What Defines 304L Stainless Steel Tube?
This product is an upgraded, extra-low-carbon version of the standard 18/8 austenitic stainless steel. This grade limits the carbon content to a maximum of 0.03% to avoid the precipitation of chromium carbides at the grain boundaries during welding operations.
This metallurgical refining is a key industrial problem. <br/><br/> Standard 304 alloys are susceptible to weld degradation if fabricated at temperatures between 425 and 815 degrees Celsius. Localised corrosion may occur in weld zones due to chromium depletion.
304L's low carbon chemistry means no post-weld heat treatment is needed, saving cash. You can deploy large-scale welded structures in corrosive conditions without sacrificing joint integrity. This is why it is the best option for applications that need both structural welding capacity and better chemical resistance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A213 / ASTM A269 / ASME SA213 / EN 10216-5 |
| Grade | 304L (UNS S30403 / 1.4306) |
| Manufacturing Process | Cold Drawn / Cold Rolled / Precision Extruded |
| Outer Diameter (OD) | 1/16" – 5" (1.59 mm – 127 mm) |
| Wall Thickness (WT) | 0.010" – 0.200" (0.25 mm – 5.08 mm) |
| Length Options | 5.8 m / 6 m / 11.8 m / 12 m / Custom Cut / Coiled |
| Surface Finish | Bright Annealed (BA) / Pickled / Mirror Polished |
| End Type | Plain End / Square Cut / Burr-Free |
| NDT Testing | Eddy Current / Ultrasonic / Hydrostatic / Air Under Water |
| Quality Certificates | EN 10204 3.1 & 3.2 MTC / ISO 9001:2015 / CE / PED |
| Third-Party Inspection | SGS / BV / TUV / DNV / ABS Accepted |
Core Material Advantages
Superior Weld Zone Integrity
Our product is based on improved low-carbon chemistry, limiting the precipitation of chromium carbide during thermal assembly. This eliminates weld-decay processes and guaranties safety of structural junction in humid and slightly corrosive situations.
Improved Heat Treatment Process
Program-controlled vertical furnace solution annealing and quick water-quenching are performed on each manufacturing lot. During this procedure all alloying elements are dissolved homogeneously and all internal micro-stresses are relieved, and therefore uniform mechanical characteristics are achieved along the tube wall.
Precision Manufacturing Quality
Drawn under precision mechanical benches, our tubes pass through horizontal atmosphere solution annealing furnaces. Automated eddy current monitoring and dimensional profile mapping confirm completely scale-free surfaces with tight tolerance control.
Flexible Customization Capability
We adapt to your specific fluid control layouts by offering specialized metric thickness configurations, clean deburred square-cut plain ends, and custom batch packaging wrapped with waterproof fiber liners.
Industrial Applications
Chemical & Petrochemical Processing
The tube serves as transport lines and heat exchanger components handling organic acids and mildly corrosive chemicals. Heavy welding requirements demand materials that maintain corrosion resistance at joint areas without post-weld annealing.
Food & Pharmaceutical Systems
Liquid processing systems, brewing equipment, and pharmaceutical transfer lines benefit from the low carbon content. Welded joints resist bacterial harboring and pitting corrosion during aggressive CIP sterilization cycles.
Marine & Wastewater Infrastructure
Coastal structural pipe and desalination pre-treatment plants need materials resistant to air salt corrosion. The 304l stainless steel tube resists local aqueous corrosion in welded areas without the danger of sensitisation.
Instrumentation & Control Systems
High-purity gas distribution lines, laboratory instrumentation, and precision fluid controls demand leak-proof performance. Our tubes meet the dimensional accuracy and surface cleanliness standards required for these critical applications.
Quality Assurance Standards
Comprehensive Testing Protocol
Every batch undergoes 100% mandatory non-destructive testing through continuous automated internal eddy current scanning loops and micro-calibrated dimensional laser profile mapping.
Material Verification
PMI (Positive Material Identification) by X-ray fluorescence testing confirms the correct Chromium, Nickel and Carbon ratios. Intergranular corrosion under ASTM A262 Practice E is tested to establish immunity to weld deterioration.
Mechanical Property Validation
Flattening, flaring, and hardness tests confirm structural integrity under stress. Tensile testing validates minimum tensile strength of 485 MPa and yield strength of 170 MPa, maintaining approximately 40% elongation.
Complete Documentation
Each shipment includes EN 10204 3.1 Mill Test Certificate documenting exact ladle chemical heat profiles, elongation percentages, and physical tensile load values for full material traceability.
Why Choose Hebei All Trust Steel
We have a rolling inventory of over 5,000 tons, strong alliances with 15+ certified steel mills and over 15 years industry expertise. We can turn out standard orders in 3-5 days and bespoke orders in 15-20 days.
We provide advanced processing including 8K mirror polishing, laser cutting, precision bending and threading services. We help you to optimise your procurement costs with mixed container loading of pipes, fittings, flanges and valves.
We have a worldwide logistics network from Shanghai, Ningbo, Tianjin, Qingdao, Shenzhen seaports with flexible terms of FOB, CFR, CIF, DDP.
FAQ
Q：What defines the localized anti-corrosion capability of this product along the weld zones?
A：This tube utilizes meticulously refined low-carbon chemistry that restricts chromium carbide precipitation during thermal assembly, preventing weld-decay phenomena and protecting structural joint safety in damp environments.
Q：What advanced heat treatment processes secure the microstructural uniformity of this low-carbon tube batch?
A：Every production lot is subjected to program-controlled vertical furnace solution annealing and rapid water-quenching lines to dissolve all alloying elements uniformly and completely eliminate internal micro-stresses.
Q：What precision non-destructive diagnostics verify that the wall is entirely leak-free prior to factory dispatch?
A：The entire batch undergoes 100% mandatory non-destructive testing, passing through continuous automated internal eddy current scanning loops and micro-calibrated dimensional laser profile mapping.
Q：Are custom wall thickness adjustments supported for precision fluid line integration blueprints?
A：Yes, we offer extensive manufacturing flexibility covering custom thin wall metrics, specialized fractional outer diameters, and tailored deburred plain cut endings.
Q：What material documentation is provided to verify the precise metallurgical tracing of this 304L line?
A：Each shipment is accompanied by an EN 10204 3.1 Mill Test Certificate documenting exact ladle chemical heat profiles, elongation percentages, and physical tensile load values.
Contact Us
Ready to secure corrosion-resistant tubing for your next project with the 304l stainless steel tube? Contact our engineering team at info@hballtrust.com for technical specifications, quotations, and custom manufacturing solutions.
