JIS G3463 Stainless Steel Heat Exchanger Coil Tube

Product Overview

JIS G3463 Stainless Steel Heat Exchanger Coil Tubes are precision-engineered, cold-worked or hot-rolled stainless steel tubes manufactured to the stringent Japanese Industrial Standards (JIS) specification for stainless steel tubes used in boilers and heat exchangers. These coil tubes are the Japanese counterpart to the widely recognized ASTM A213 and ASTM A269 standards, offering equivalent performance with the added benefit of compliance with Japan's rigorous quality assurance framework. Produced by Wenzhou Jixing Metal Materials Co., Ltd., these coil tubes are supplied in continuous coil form, providing maximum material utilization, reduced welding requirements, and superior dimensional consistency for demanding thermal-fluid exchange applications.

Material & Properties

JIS G3463 covers a comprehensive range of austenitic and ferritic stainless steel grades, each carefully selected for specific corrosion resistance, thermal conductivity, and mechanical performance characteristics. The primary grades include:

All materials undergo rigorous chemical composition analysis and mechanical testing to ensure full conformance with JIS G3463 requirements, including minimum yield strength, tensile strength, elongation, and hardness specifications.

Specifications

Parameter Specification / Range
Applicable Standard JIS G3463 (Equivalent to ASTM A213 / ASTM A269)
Tube Form Coil (Continuous Coiled Length)
Manufacturing Method Seamless (Hot-Finished) or Welded (Cold-Finished) per JIS G3463
Outside Diameter (OD) 3.00 mm – 158.75 mm (0.118 in – 6.250 in)
Wall Thickness 0.25 mm – 15.88 mm (0.010 in – 0.625 in)
Coil Length Customizable; typically 15 m – 100 m per coil
Surface Finish Pickled & Passivated (P&P), 2B, BA (Bright Annealed), or as specified
Grain Size Per JIS G3463 requirements (typically No. 7 – No. 10 for seamless)
Hardness ≤ 95 HRB (annealed condition) unless otherwise specified
Hydrostatic Test Performed per JIS G3463 at specified pressure; no leakage permitted
End Condition Plain ends or beveled ends as per customer requirement
Temperature Range −196 °C to +1100 °C (depending on grade)
Maximum Working Pressure Up to 40 MPa (subject to grade, wall thickness, and temperature)

Manufacturing Process

The production of JIS G3463 stainless steel heat exchanger coil tubes follows a tightly controlled, multi-stage manufacturing process to ensure dimensional accuracy, metallurgical integrity, and surface quality:

  1. Raw Material Selection: High-purity stainless steel billets or strip are sourced from certified mills with full traceability. Incoming material undergoes spectroscopic analysis to verify chemical composition compliance with JIS G3463.
  2. Hot Rolling / Hot Extrusion: Billets are heated to controlled forging temperatures and passed through rolling mills or extrusion dies to form initial tube shapes with precise OD and wall thickness tolerances.
  3. Piercing & Enlarging: For seamless tubes, the hot billet is pierced on a Mannesmann-type unit and then enlarged through multiple passes to achieve the target dimensions.
  4. Heat Treatment (Annealing): Tubes are annealed in a controlled-atmosphere furnace (typically hydrogen or vacuum) to relieve internal stresses, restore full ductility, and achieve the required grain structure.
  5. Pickling & Passivation: The annealed tubes are acid-pickled to remove scale and oxide layers, followed by passivation treatment to form a protective chromium oxide film, ensuring maximum corrosion resistance.
  6. Cold Working (if applicable): Tubes requiring tighter dimensional tolerances or higher mechanical strength undergo cold drawing or cold reducing passes, followed by intermediate annealing as needed.
  7. Coiling: Finished tubes are wound onto precision coiling heads to produce continuous coils with minimal kinking or deformation. Coil diameter and wrap density are optimized for downstream processing.
  8. Final Inspection: Each coil undergoes hydrostatic pressure testing, dimensional verification (OD, wall thickness, roundness), surface inspection, and optional eddy current testing to detect internal and external defects.

Applications

JIS G3463 stainless steel heat exchanger coil tubes are engineered for the most demanding thermal-fluid exchange environments across multiple industries:

Quality Certifications

Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management infrastructure to ensure every JIS G3463 coil tube meets or exceeds international standards:

Unique Selling Points

Japanese Standard Precision with Global Compatibility — JIS G3463 coil tubes offer the exacting quality standards of Japanese manufacturing while remaining fully compatible with ASTM A213/A269 specifications, giving customers the flexibility to source materials that meet both Japanese and international project requirements.

Ordering Information

For technical inquiries, sampling requests, or bulk orders, contact Wenzhou Jixing Metal Materials Co., Ltd. with the following details: required JIS grade, outside diameter, wall thickness, desired coil length, surface finish, and any special inspection or certification requirements. Our engineering team will provide detailed quotations and delivery schedules based on your specific application parameters.