JIS G4305 SUS 304L Cold Rolled Stainless Steel Coil Supplier

SUS304L Cold Rolled Stainless Steel Coil & Sheet | JIS G4305 304L Stainless Steel Strip Manufacturer & Exporter – Gangsteel

Gangsteel is a premier manufacturer and global exporter of high-quality JIS G4305 SUS304L cold rolled stainless steel coils, sheets, and strips. As the low-carbon variant of the iconic SUS304 (Grade 304L or UNS S30403), SUS304L offers exceptional corrosion resistance, superior weldability, and excellent formability, making it the preferred choice for applications involving welding, heavy fabrication, or exposure to environments where intergranular corrosion must be avoided.

The "L" designation indicates extra-low carbon (≤0.030%), which significantly reduces carbide precipitation during welding, preserving corrosion resistance in the heat-affected zone. Our advanced cold rolling lines produce SUS304L with premium surface finishes (2B, BA, No.4, HL, Mirror), tight tolerances (±0.02 mm), and reliable properties fully compliant with JIS G4305 (Cold-rolled stainless steel plate, sheet and strip). Equivalent to ASTM A240 Type 304L, EN 1.4307 (X2CrNi18-9), and GB 022Cr19Ni10, Gangsteel's SUS304L products serve industries worldwide including food processing, chemical equipment, pharmaceuticals, architecture, heat exchangers, and welded structures.

This comprehensive product introduction details every aspect of our JIS G4305 SUS304L cold rolled stainless steel — from composition and properties (in tables) to manufacturing, applications, advantages, and why Gangsteel is your trusted partner for consistent, high-performance supply.

Introduction to SUS304L Stainless Steel

SUS304L is an austenitic 18/8 chromium-nickel stainless steel with reduced carbon content compared to standard SUS304, enhancing resistance to intergranular corrosion after welding or high-temperature exposure. It maintains the excellent general corrosion resistance, hygiene, and mechanical properties of SUS304 while offering improved weld performance without the need for post-weld annealing in most cases.

Non-magnetic in the annealed state, SUS304L provides good ductility, toughness at cryogenic temperatures, and oxidation resistance up to ~870°C intermittent. Gangsteel specializes in cold rolled SUS304L, optimizing it for deep drawing, stamping, bending, polishing, and high-integrity welding in critical applications.

Chemical Composition of JIS G4305 SUS304L

Chemical Composition Table

Gangsteel's production uses tight controls (often lower C and optimal Ni) for maximum weld integrity and performance. Full chemical analysis and EN 10204 3.1 certificates are provided.

Mechanical Properties

In annealed condition per JIS G4305:

Mechanical Properties Table (Annealed)

SUS304L exhibits moderate work hardening, similar to SUS304, suitable for general fabrication.

Physical Properties

Physical Properties Table

These properties support excellent performance in hygienic and thermal applications.

Equivalent Materials Comparison

Equivalent Materials Comparison Table

SUS304L offers superior weld-zone corrosion resistance compared to SUS304.

Manufacturing Process: Cold Rolled at Gangsteel

Gangsteel's process: hot rolling to intermediate thickness, annealing/pickling, multi-pass cold reduction in precision mills, final bright annealing/skin pass, slitting/edge trimming. Thickness: 0.3–3.0 mm (coils/sheets). Width: 600–1524 mm. In-line gauge and surface inspection ensure defect-free material.

Finishes: 2B (standard matte), BA (bright annealed), No.4/HL (brushed), Mirror. Protective films and custom slitting available.

Available Forms, Sizes, and Specifications

• Cold rolled coils: 0.3–3.0 mm thick, up to 1524 mm wide
• Cold rolled sheets: Cut-to-length up to 6000 mm
• Strips: Narrow from 10 mm

Compliant with JIS G4305; optional ASTM A240/EN cross-certification. Tolerances per JIS or tighter.

Key Applications of SUS304L Cold Rolled Products

SUS304L excels in welded, corrosive, or hygienic environments:

Food Processing and Pharmaceuticals

• Tanks, piping, heat exchangers, dairy equipment
• Pharmaceutical vessels, cleanroom components

Chemical and Petrochemical

• Welded structures, storage tanks, processing equipment
• Mild chemical handling

Architectural and Decorative

• Cladding, handrails, elevator interiors (welded assemblies)
• Indoor/outdoor trim

General Fabrication

• Heat exchangers, boilers, welded pipes
• Automotive trim, kitchen appliances requiring welding

Its weldability suits heavy fabrication and corrosive service.

Advantages of Choosing SUS304L Stainless Steel

• Superior resistance to intergranular corrosion post-welding
• Excellent general corrosion resistance in mild environments
• Outstanding formability, weldability, and hygiene
• Good strength and toughness from cryogenic to elevated temperatures
• Cost-effective for welded applications vs. stabilized grades
• Non-magnetic annealed; easy to clean and polish
• Wide global acceptance and recyclability

Compared to SUS304, SUS304L sacrifices slight strength for better weld performance.

Corrosion and Oxidation Resistance

Forms stable Cr oxide layer; resists rust in fresh water, mild acids, organics, and atmospheres. Excellent in welded conditions due to low C; better than SUS304 in sensitization-prone scenarios. Oxidation resistance up to ~870°C intermittent.

Weldability and Fabrication

Outstanding weldability with TIG/MIG/resistance/laser; low carbon eliminates sensitization risk. Use ER308L fillers. High ductility supports complex forming.

Why Choose Gangsteel for SUS304L Cold Rolled Coils and Sheets?

• Precision cold rolling with advanced control
• Strict JIS G4305 compliance and traceability
• Diverse finishes/stock for quick delivery
• Competitive pricing, flexible MOQ
• Export to 60+ countries with seaworthy packaging
• Technical support: welding advice, specs
• ISO 9001 certified; third-party inspections (SGS/BV/TUV)

Quality Assurance and Certifications

Batch testing: chemical, mechanical, surface, dimensional. MTRs with heat traceability. Audits supported.

Packaging, Shipping, and Logistics

Coils eye-to-sky/wall on pallets, waterproof/edge-protected. Sheets skidded. Container/bulk with tracking/insurance.

Conclusion: Partner with Gangsteel for Reliable SUS304L Solutions

SUS304L Cold Rolled Stainless Steel Coil & Sheetfrom Gangsteel, produced to JIS G4305, provides superior weldability, corrosion resistance, and versatility for critical welded applications. As a dedicated manufacturer and exporter, we deliver consistent quality and service worldwide.

Contact Gangsteel today for competitive quotes, samples, technical data sheets, or custom SUS304L cold rolled stainless steel coils, sheets, and strips. Rely on us for premium low-carbon stainless solutions.