JIS G4305 SUS 444 Cold Rolled Stainless Steel Coil Supplier

JIS G4305 SUS444 Cold Rolled Stainless Steel Coil & Sheet | JIS G4305 444 Stainless Steel Strip Manufacturer & Exporter – Gangsteel

Gangsteel is a leading manufacturer and global exporter of premium JIS G4305 SUS444 cold rolled stainless steel coils, sheets, and strips. As a molybdenum-bearing, titanium/niobium-stabilized ferritic grade (Grade 444 or UNS S44400), SUS444 offers outstanding pitting and crevice corrosion resistance (PREN 23–28), superior chloride resistance comparable to austenitic SUS316 in many environments, excellent weldability, and good high-temperature oxidation resistance up to 850°C. The ultra-low carbon (≤0.025%) combined with stabilization elements makes it ideal for welded components exposed to aggressive media while remaining cost-effective.

Our precision cold rolling facilities produce SUS444 with high-quality surface finishes (2B, BA, No.4, HL), tight tolerances (±0.02 mm), and consistent properties fully compliant with JIS G4305 (Cold-rolled stainless steel plate, sheet and strip). Equivalent to ASTM A240 Type 444, EN 1.4521 (X2CrMoTi18-2), and GB 019Cr19Mo2NbTi, Gangsteel's SUS444 products serve demanding industries worldwide including automotive exhaust systems, solar water heaters, hot-water tanks, heat exchangers, washing machines, and architectural components in chloride-rich environments.

This comprehensive product introduction details every aspect of our JIS G4305 SUS444 cold rolled stainless steel — from composition and properties (in tables) to manufacturing, applications, advantages, and why Gangsteel is your trusted partner for reliable, high-corrosion ferritic supply.

Introduction to SUS444 Stainless Steel

SUS444 is a high-performance ferritic stainless steel containing 17–20% chromium and 1.75–2.50% molybdenum, stabilized with titanium, niobium, or zirconium. It provides pitting resistance far superior to standard SUS430 and approaches SUS316 in many chloride-containing applications, while offering the cost and thermal conductivity advantages of ferritic grades. The ultra-low carbon content and stabilization prevent intergranular corrosion and sensitization after welding or heat exposure.

Magnetic in all conditions and non-hardenable by heat treatment, SUS444 excels in deep drawing, roll forming, and welding. Gangsteel specializes in cold rolled SUS444, optimizing it for high-volume stamping and welded assemblies in corrosive service.

Chemical Composition of JIS G4305 SUS444

Chemical Composition Table

Gangsteel's production ensures optimal Mo and stabilization for maximum pitting resistance. Full chemical analysis and EN 10204 3.1 certificates are standard.

Mechanical Properties

In annealed condition per JIS G4305:

Mechanical Properties Table (Annealed)

SUS444 exhibits low work-hardening and outstanding formability.

Physical Properties

Physical Properties Table

These properties ensure excellent thermal conductivity and stability in heat exchangers and exhaust systems.

Equivalent Materials Comparison

Equivalent Materials Comparison Table

SUS444 offers pitting resistance approaching SUS316 at lower cost.

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 controls ensure tight tolerances and superior surfaces.

Finishes: 2B (standard matte), BA (bright annealed), No.4/HL (brushed). 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 SUS444 Cold Rolled Products

SUS444 excels in chloride and high-temperature environments:

Automotive Exhaust Systems

• Muffler shells, catalytic converter casings, exhaust flanges
• Heat shields, trim

Solar and Hot-Water Systems

• Solar water heater tanks, panels
• Hot-water storage tanks

Heat Exchangers and Appliances

• Washing machine drums, dishwasher tubs
• Condenser tubes, heat exchangers

Architectural and Industrial

• Coastal cladding, railings
• Chemical processing equipment

Its pitting resistance suits aggressive service.

Advantages of Choosing SUS444 Stainless Steel

• Excellent pitting/crevice resistance (PREN 23–28)
• Good weldability with low sensitization risk
• Superior deep-drawability and formability
• Cost-effective alternative to SUS316
• Higher thermal conductivity than austenitics
• Magnetic for easy recycling
• Oxidation resistance up to 850°C

Corrosion and Oxidation Resistance

Mo addition provides strong pitting resistance in chlorides; comparable to SUS316 in many cases. Ti/Nb stabilization prevents intergranular corrosion. Oxidation resistance up to ~850°C intermittent.

Weldability and Fabrication

Excellent weldability; low carbon and stabilization minimize grain growth. TIG, MIG, and resistance welding compatible. High ductility supports deep drawing.

Why Choose Gangsteel for SUS444 Cold Rolled Coils and Sheets?

• Precision cold rolling with advanced mills
• Strict JIS G4305 compliance and traceability
• Diverse finishes/stock for fast delivery
• Competitive pricing, flexible MOQ
• Export to 60+ countries with seaworthy packaging
• Technical support: corrosion/formability 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 welcomed.

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 High-Corrosion SUS444 Solutions

444 Cold Rolled Stainless Steel Coil & Sheetfrom Gangsteel, produced to JIS G4305, delivers outstanding pitting resistance, formability, and value for chloride-exposed applications. As a dedicated manufacturer and exporter, we ensure consistent quality and dedicated service worldwide.

Contact Gangsteel today for competitive quotes, samples, technical data sheets, or custom SUS444 cold rolled stainless steel coils, sheets, and strips. Trust us for premium molybdenum-stabilized ferritic stainless solutions.