JIS G3463 Stainless Steel Coil Tube for Boilers and Heat Exchangers
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. offers a premium line of stainless steel coil tubes manufactured in strict accordance with JIS G3463 — the Japanese Industrial Standard governing stainless steel tubes for boilers and heat exchangers. This Japanese-standard coil tube is the direct equivalent of the widely recognized ASTM A213 and ASTM A269 specifications, providing global buyers with seamless compatibility between Japanese and American material standards.
Available in a continuous coil form, these tubes are designed for high-efficiency forming, cutting, and fabrication into compact heat exchange assemblies. The coil configuration eliminates the need for butt-welding straight lengths, reducing thermal stress points and improving overall heat transfer performance in demanding industrial environments.
Material & Properties
JIS G3463 stainless steel coil tubes are available in multiple austenitic and austenitic-ferritic grades, each engineered for superior corrosion resistance, thermal conductivity, and mechanical integrity at elevated temperatures.
- SUS304 (06Cr19Ni10): Excellent general-purpose corrosion resistance; ideal for food processing, chemical, and pharmaceutical heat exchangers.
- SUS316 (06Cr17Ni12Mo2): Enhanced chloride and pitting resistance; preferred for marine, chemical processing, and high-salinity applications.
- SUS321 (06Cr18Ni11Ti): Titanium-stabilized grade offering superior resistance to intergranular corrosion at temperatures between 425 °C and 870 °C.
- SUS310S (06Cr25Ni20): High-temperature grade suitable for furnace tubes and extreme thermal cycling environments up to 1100 °C.
- SUS304L (022Cr19Ni10): Low-carbon variant for applications requiring welding without post-weld heat treatment.
Key material properties include:
- Operating temperature range: −196 °C to 1100 °C (depending on grade)
- Minimum tensile strength: 520 MPa (75,400 psi) for SUS304
- Corrosion resistance: Superior to carbon steel by a factor of 20–50× in oxidizing environments
- Thermal conductivity: 14–22 W/(m·K) at 20 °C
- Non-magnetic (austenitic grades in annealed condition)
Specifications
| Parameter | Specification |
|---|---|
| Standard | JIS G3463 (Equivalent to ASTM A213 / ASTM A269) |
| Product Form | Continuous Coil Tube (盘管) |
| Manufacturing Method | Seamless / Welded (per JIS G3463) |
| Outside Diameter (OD) | 3.0 mm – 25.4 mm (0.118 in – 1.000 in) |
| Wall Thickness | 0.25 mm – 2.00 mm (0.0098 in – 0.0787 in) |
| Coil Length | Custom; typically 50 m – 500 m (164 ft – 1,640 ft) per coil |
| Coil Inner Diameter | 500 mm – 1,500 mm (19.7 in – 59.1 in) |
| Tolerance (OD) | ±0.10 mm to ±0.25 mm (±0.004 in to ±0.010 in) |
| Tolerance (Wall) | ±10% of nominal thickness |
| Surface Finish | Bright Annealed (BA) / Pickled & Passivated |
| Available Grades | SUS304, SUS304L, SUS316, SUS316L, SUS321, SUS310S |
| Delivery Condition | Annealed and Pickled (AP), Bright Annealed (BA) |
| End Condition | Cut to length or continuous coil |
Manufacturing Process
The production of JIS G3463 stainless steel coil tubes follows a rigorous multi-stage manufacturing process to ensure dimensional accuracy, metallurgical integrity, and surface quality:
- Raw Material Selection: High-purity stainless steel billets or strip are sourced from certified Japanese and international mills, verified by mill test certificates (MTC) for chemical composition compliance.
- Hot Rolling / Seamless Piercing: Billets are heated to forging temperature and pierced or hot-rolled into hollow round sections to achieve preliminary tube geometry.
- Cold Drawing / Rolling: Tubes are cold-worked through precision dies or rollers to achieve final dimensions within tight JIS tolerances, improving grain structure and mechanical properties.
- Solution Annealing: Tubes are heated to 1050–1150 °C and rapidly quenched to dissolve carbides, restore full austenitic structure, and relieve residual stresses from cold working.
- Pickling and Passivation: The surface is treated with nitric/hydrofluoric acid solutions to remove oxide scale and form a stable chromium oxide passivation layer for maximum corrosion resistance.
- Coil Winding: Annealed tubes are wound onto precision coil spools with controlled tension to prevent deformation, kinking, or surface marring.
- Final Inspection: Each coil undergoes hydrostatic testing, dimensional measurement, spectrographic analysis, and visual surface inspection prior to packaging.
Applications
JIS G3463 stainless steel coil tubes find extensive use across industries requiring reliable heat transfer under corrosive or high-temperature conditions:
- Heat Exchangers: Shell-and-tube, plate-fin, and air-cooled heat exchangers in petrochemical, power generation, and HVAC systems.
- Boilers: Water-tube boilers, waste heat recovery boilers, and superheater tubes in thermal power plants.
- Chemical Processing: Reactors, condensers, evaporators, and distillation columns handling aggressive chemicals and acids.
- Food & Beverage Industry: Pasteurizers, condensers, and hygienic heat exchangers requiring sanitary-grade surfaces.
- Pharmaceutical Manufacturing: Clean-in-place (CIP) systems and process heat exchangers meeting GMP standards.
- Marine & Offshore: Seawater coolers, condenser tubes, and ballast water heat exchangers in shipbuilding.
- Aerospace: Engine cooling loops, fuel conditioning systems, and thermal management components.
- Automotive: Intercooler tubes, exhaust heat recovery, and emissions control systems.
Unique Selling Points
- Dual-Standard Compliance: Full equivalence to both JIS G3463 and ASTM A213/A269 eliminates specification conflicts in multi-market projects.
- Coil Form Advantage: Continuous coil delivery reduces installation labor, minimizes weld joints, and enables compact U-bend and serpentine heat exchanger geometries.
- Precision Dimensional Control: Tight OD and wall tolerances ensure consistent fluid flow characteristics and optimal thermal performance.
- Full Traceability: Every coil is accompanied by a complete mill test certificate with heat number, chemical analysis, and mechanical test results.
- Custom Coil Configuration: Tailored coil lengths, inner diameters, and cutting patterns to match customer-specific fabrication requirements.
Quality Certifications
Wenzhou Jixing Metal Materials Co., Ltd. maintains an internationally recognized quality management system and holds the following certifications:
- ISO 9001:2015 — Quality Management System certification
- JIS G3463 — Japanese Industrial Standard compliance for stainless steel tubes for boilers and heat exchangers
- ASTM A213 / ASTM A269 — American Standard for stainless steel tubes for heat-transfer applications
- EN 10216-5 — European Standard for seamless and welded stainless steel tubes (where applicable)
- NACE MR0175 / ISO 15156 — Resistance to sulfide stress cracking (for applicable grades)
- Third-Party Inspection: Available upon request from SGS, BV (Bureau Veritas), or TÜV
- Mill Test Certificate (MTC / EN 10204 3.1): Provided with every shipment, including chemical composition, mechanical properties, and heat treatment records
Note: All products are manufactured to meet the stringent requirements of JIS G3463 and are suitable for demanding boiler and heat exchanger applications worldwide. For specific grade requirements, dimensional tolerances, or special delivery conditions, please contact Wenzhou Jixing Metal Materials Co., Ltd. for a customized technical quotation.