JIS G4305 SUS 430 BA Cold Rolled Stainless Steel Coils

JIS G4305 SUS 430 BA 2BA BA0 NO.4 Cold Rolled Stainless Steel Sheet and coils supplier from China yongjin mill

Gangsteel, a premier Chinese Yongjin mill agent and exporter specializing in high-quality cold-rolled stainless steel sheets and coils, proudly presents our flagship product: JIS G4305 SUS 430 Cold Rolled Stainless Steel Sheet. Manufactured in compliance with the stringent Japanese Industrial Standard JIS G4305, this ferritic stainless steel grade delivers exceptional value through its balanced combination of corrosion resistance, formability, heat resistance, and cost-effectiveness. As a nickel-free 17% chromium stainless steel, SUS430 serves as an economical alternative to austenitic grades like SUS304, making it ideal for a wide range of applications where mild corrosive environments, aesthetic appeal, and structural integrity are required.

SUS430 belongs to the 400 series of ferritic stainless steels, characterized by a body-centered cubic (BCC) crystal structure. This structure imparts strong magnetic properties, excellent thermal conductivity (approximately 26 W/m·K, significantly higher than austenitic steels), and good resistance to oxidation and scaling up to approximately 815°C (1500°F) in intermittent service and 760°C (1400°F) in continuous service. Unlike austenitic grades, SUS430 does not undergo phase transformation during welding or forming, minimizing distortion and simplifying fabrication. Its low carbon content (maximum 0.12%) ensures superior weldability and resistance to intergranular corrosion, while the absence of nickel keeps production costs competitive in global markets.

At Gangsteel, we produce SUS430 cold-rolled sheets and coils using state-of-the-art Japanese and European rolling mills, precise annealing furnaces, and advanced surface treatment lines. Our products are exported worldwide to markets in Europe, North America, Southeast Asia, and the Middle East, where they meet or exceed international standards including ASTM A240, EN 10088-2, and GB/T 3280. Available in coils and cut-to-length sheets, our SUS430 offerings support customization for thickness, width, length, and surface finishes to suit exact customer specifications.

What We sell for stainless steel coils of JIS G4305 SUS 430?

We sell Yongjin mill 430BA STAINLESS STEEL COIL AND SHEET In the following 

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Chemical Composition 

The chemical composition of JIS G4305 SUS430 is tightly controlled to optimize performance. Below is the standard composition (weight %):

This composition ensures a stable passive chromium oxide layer for corrosion resistance in atmospheric, fresh water, and mild chemical environments. The chromium range of 16-18% provides superior performance compared to lower-chromium ferritics like SUS410, while the controlled impurities prevent embrittlement.

Mechanical Properties

SUS430 in the annealed condition (standard for cold-rolled products under JIS G4305) exhibits excellent ductility and moderate strength. Representative mechanical properties are as follows (minimum values unless noted):

Density: 7.70 g/cm³ Young’s Modulus: 200 GPa These properties make SUS430 highly formable via deep drawing, bending, and stretching. It maintains good toughness at cryogenic temperatures and moderate high-temperature strength, outperforming carbon steels in oxidation resistance.

Equivalent Grades OF JIS G4305 SUS 430BA

SUS430 is widely recognized globally. The table below shows cross-references:

These equivalents allow seamless substitution in international projects while maintaining identical performance characteristics.

JIS G4305 SUS430 STAINLESS STEEL COIL PRICE DATE OF 2026023 FOB China Port

Yongjin mill First Class mill and 100% Quality promising

Available Surface Finishes

Gangsteel offers SUS430 in five premium surface finishes tailored to customer needs: BA, BA0, 2BA, 2B, and NO.4. Each finish undergoes rigorous processing for uniformity and quality.

• 2B Finish: The most common and economical cold-rolled finish. Produced by cold rolling, annealing, pickling, and a light temper pass on polished rolls. It delivers a smooth, moderately reflective, matte silver-gray appearance (Ra 0.1-0.5 μm). Ideal for industrial and structural uses where aesthetics are secondary to functionality. Excellent corrosion resistance due to the pickled surface.
• BA (Bright Annealed) Finish: Achieved by annealing in a controlled, oxygen-free atmosphere after cold rolling, preventing oxidation and scaling. Results in a highly reflective, mirror-like bright surface (Ra <0.1 μm) with superior cleanliness and reflectivity (70-90%). Perfect for decorative and food-contact applications requiring a premium shine without additional polishing.
• BA0 Finish: An enhanced variant of BA, representing the highest brightness level (often called “BA zero” or super-bright). It undergoes extra surface control during annealing and light skin-passing for near-mirror perfection. Used in high-end appliances, lighting reflectors, and architectural accents where maximum luster and cleanliness are demanded.
• 2BA Finish: A hybrid between 2B and BA, achieved through specialized bright annealing followed by a controlled temper pass. It offers the smoothness of 2B with enhanced reflectivity closer to BA (Ra 0.05-0.2 μm). Widely popular in Asian markets for cost-effective decorative panels, elevator doors, and kitchen equipment.
• NO.4 Finish: A satin-polished finish created by mechanically polishing with 150-320 grit abrasives after base annealing/pickling. Produces a directional, fine-lined brushed appearance that hides fingerprints and scratches effectively. Excellent for architectural cladding, automotive trim, and food processing equipment requiring both aesthetics and cleanability.

All finishes comply with JIS, ASTM A480, and EN 10088-2 tolerances. Gangsteel’s advanced polishing and inspection lines ensure Ra values, gloss, and flatness meet the tightest specifications.

Product Specifications and Tolerances

• Thickness: 0.3 mm – 3.0 mm (standard cold-rolled range; up to 6 mm available on request)
• Width: 600 mm – 2000 mm (slit or mill edge)
• Length: Up to 6000 mm (sheets) or coil form (ID 508/610 mm)
• Tolerance: Thickness ±0.03 mm (typical), Width ±0.5 mm, Flatness ≤8 mm/m
• Edge: Slit, mill, or deburred

Custom slitting, leveling, and protective PVC/PE film coating are available.

Manufacturing Process at Gangsteel

Our production begins with high-purity electric arc furnace (EAF) or AOD refining to achieve precise chemistry. Hot rolling produces coils, followed by cold rolling on 20-high Sendzimir or 4-high mills for superior thickness uniformity. Annealing occurs in bright or continuous furnaces under hydrogen/nitrogen atmosphere for optimal softness and surface quality. Final pickling, skin-passing, polishing, and inspection (including eddy current and visual AI systems) guarantee defect-free material. Every batch undergoes third-party testing (SGS, TUV, or BV) for full traceability.

Key Advantages of Gangsteel SUS430

1. Cost Efficiency: No nickel content reduces price by 30-50% versus SUS304 while delivering comparable performance in non-aggressive environments.
2. Superior Thermal Properties: Higher thermal conductivity and lower thermal expansion (10.5 × 10⁻⁶/°C) reduce warping in heat exchangers and appliances.
3. Excellent Formability: High ductility allows complex deep drawing without cracking.
4. Magnetic & Weldable: Easy magnetic handling and good weldability with matching filler or austenitic fillers.
5. Environmental Sustainability: Fully recyclable, low-carbon footprint production, and long service life.
6. Consistent Quality: Gangsteel’s 3000+ ton inventory and ISO 9001 / IATF 16949 certified processes ensure on-time delivery and zero-defect shipments.

Compared to SUS304, SUS430 offers better thermal conductivity and lower cost but slightly lower corrosion resistance in chloride or acidic media. It outperforms carbon steel in rust resistance and aesthetics while maintaining similar strength.

Wide Range of Applications

SUS430 cold-rolled sheets excel across industries:

Household Appliances: Refrigerator doors, washing machine panels, microwave ovens, and range hoods benefit from the bright BA/2BA finishes and formability. The material’s heat resistance suits oven liners.

Architectural & Construction: Elevator interiors, wall cladding, roofing, and decorative trim use NO.4 or BA finishes for durability and modern appearance. Its atmospheric corrosion resistance ensures longevity in urban environments.

Automotive: Exterior trim, wheel covers, exhaust components (non-high-temperature zones), and interior accents leverage its formability and cost savings.

Food Processing & Kitchenware: Sinks, countertops, utensils, and commercial equipment exploit the smooth, hygienic surfaces (especially 2B and NO.4) that meet FDA and EU food-contact standards.

Industrial Equipment: Heat exchangers, radiant tubes, furnace parts, and conveyor belts utilize its oxidation resistance up to 815°C. Cryogenic vessels benefit from retained toughness.

Other: Solar panel frames, signage, lighting fixtures, and medical instrument trays.

In each case, SUS430 delivers reliable performance with lower lifecycle costs.

Quality Assurance and Certifications

Gangsteel implements a comprehensive quality management system. Chemical analysis via OES, mechanical testing per JIS, and surface inspection per ASTM ensure compliance. We provide EN 10204 3.1/3.2 certificates, material safety data sheets, and RoHS/REACH compliance. Mill test reports trace every coil back to the heat number.

Why Choose Gangsteel?

As a specialized exporter with decades of experience, Gangsteel offers competitive pricing, flexible MOQ (as low as 5 tons), fast lead times (15-30 days), and professional technical support. Our dedicated export team assists with documentation, logistics, and customization. Customers worldwide trust us for consistent quality, reliable supply, and responsive service. Whether you need standard 2B coils or premium BA0 mirror sheets, Gangsteel delivers excellence.

YONGJIN ORIGIN 430BA STAINLESS STEEL PLATE, YONGJIN THE LARGE AGENT IN CHINA

JIS G4305 SUS 430 Cold Rolled Stainless Steel Sheet from Gangsteel represents the perfect balance of performance, aesthetics, and economy. Its proven mechanical properties, versatile surface finishes, and broad applicability make it the material of choice for manufacturers seeking reliable, cost-effective stainless solutions.

Contact Gangsteel today to discuss your project requirements, request samples, or obtain a competitive quotation. Let us help you elevate your products with the superior quality and value of Chinese-manufactured SUS430.