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Help CenterCold-Rolled CA BA Tinplate Sheet, MR Grade, 0.23mm Thickness, 3.2g/m2 Tin Coating, Standard Compliant
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As a professional tinplate manufacturer located in Qingdao, Shandong, China, Shandong Sino Steel Co., Ltd. offers this cold-rolled CA BA tinplate sheet in MR grade, with a precise 0.23mm thickness and a uniform 3.2g/m2 tin coating. This product is engineered for industries that need dependable corrosion resistance, excellent formability, and a clean surface for printing and lacquering. Backed by our factory area of 10,000-30,000 square meters and a team of 101-200 employees, we produce tinplate with strict process control and standard-compliant dimensions. Our company has served buyers across North America, South America, Eastern Europe, Southeast Asia, Africa, the Middle East, and other regions, providing stable export supply from Qingdao, Tianjin, and Shanghai. We are committed to helping customers achieve a smooth manufacturing flow and consistent end-product quality.
Product Overview
This tinplate sheet is made from cold-rolled MR grade low-carbon steel, which is known for its balanced mechanical properties and suitability for tin coating. The 0.23mm gauge is a common choice for lightweight packaging and formed components, providing enough strength for many applications while keeping material usage economical. The 3.2g/m2 tin coating offers moderate protection against corrosion and maintains good solderability. In addition, the availability of both continuous annealing (CA) and batch annealing (BA) gives customers flexibility in selecting hardness, ductility, and surface appearance.
Primary Features
- MR Grade Steel Substrate: Provides stable chemical composition and mechanical strength for stamping, drawing, and bending processes.
- Cold-Rolled Precision: The 0.23mm thickness is controlled through cold rolling to ensure uniform gauge and flat surfaces.
- CA and BA Annealing Options: Both annealing methods are available so you can choose the temper that best fits your forming method.
- 3.2 g/m2 Tin Coating: Delivers adequate solderability, corrosion resistance, and a consistent base for printing or lacquering.
- Standard Compliant: Manufactured to common industry tolerances for tin mill products, supporting predictable downstream operations.
- Customizable Dimensions: Width and length can be tailored to your process, reducing edge scrap and improving material yield.
Annealing Method and Mechanical Selection
The annealing process directly affects the final properties of tinplate. In continuous annealing, the strip passes through a continuous heating and cooling cycle at higher speeds, which typically results in higher hardness and better flatness. This is suitable for applications involving high-speed printing, punching, or blanking. In batch annealing, coils are heated slowly in a furnace and cooled gradually, which usually gives a softer and more ductile material. Batch annealed tinplate is often preferred for deep drawing or complex forming jobs. Since our production line supports both CA and BA, you can specify your preferred annealing method based on the mechanical requirements of your products.
Technical Specifications
| Parameter | Value |
| Steel Grade | MR |
| Base Material | Cold-rolled low-carbon steel |
| Thickness | 0.23 mm |
| Tin Coating Weight | 3.2 g/m2 |
| Annealing Method | CA (Continuous Annealing) / BA (Batch Annealing) |
| Surface Finish | Bright / Stone (optional) |
| Edge Treatment | Trimmed / Slit |
| Width / Length | Customizable (coil or sheet) |
| Application Areas | Food packaging, cans, electrical parts, general manufacturing |
Material and Coating Performance
MR grade steel is a low-carbon grade often selected for tinplate because it offers a good balance of strength and ductility. The controlled composition minimizes unexpected variations during stamping or drawing. The tin coating layer is deposited uniformly across the strip surface, giving a protective film that is tightly adhered and largely free of exposed spots. This layer supports good solderability and acts as a barrier against oxidation. For food-contact packaging, the coated surface can be further treated or lacquered to satisfy the specific requirements of the end application. The bright finish gives a shiny, reflective appearance, while the stone finish offers a softer matte texture. Both are commonly used in different packaging designs, and the choice can be discussed based on your visual and functional needs.
Benefits for Manufacturing
By choosing this cold-rolled CA BA tinplate sheet, customers benefit from consistent gauge and flatness. These factors help reduce tool wear, improve cutting accuracy, and lower rejection rates in stamping lines. The 0.23mm thickness is suitable for applications that need a moderately thin but strong material, such as crown caps, battery shells, and small containers. The 3.2g/m2 tin coating provides sufficient tin for most interior and exterior uses while keeping coating costs reasonable. Additionally, the customizable coil or sheet dimensions allow you to optimize nesting, reduce material waste, and improve overall productivity.
Applications
This product is widely used in producing food cans, beverage ends, closures, battery outer shells, electrical components, and light industrial packaging. Its combination of MR grade steel and 3.2g/m2 tin coating supports processes such as blanking, flanging, seaming, and printing. Because the tin layer provides a barrier against corrosion and a base for lacquer adhesion, it is especially suitable for packaging that demands both durability and aesthetic appeal.
Quality Assurance and Company Experience
Shandong Sino Steel Co., Ltd. has been manufacturing steel products since 2018. Our factory occupies 10,000-30,000 square meters and employs 101-200 people, with an annual export value between US$2.5 million and US$5 million. We maintain a quality management system certified to ISO9000 and ISO19011:2000, which underscores our commitment to process stability and continuous improvement. Every shipment is inspected for thickness, coating weight, surface quality, and packaging integrity. We also operate an overseas office to improve communication with international buyers and respond quickly to after-sales inquiries.
Customization, Packaging, and Logistics
We understand that every production line is different. Therefore, we offer flexibility in width, length, hardness, surface finish, and packing method. Typical options include slit coils, flat sheets, wooden pallets, steel pallets, wooden cases, and steel-strapped bundles. Our locations near Qingdao, Tianjin, and Shanghai ports allow convenient sea freight export to many destinations. Please contact us with your required quantity and specifications, and we will provide a quotation that matches your production schedule and cost targets.
Frequently Asked Questions
Q1: What is the difference between CA and BA tinplate?
A1: CA refers to continuous annealing, where the steel strip is processed in a continuous line at higher temperatures and quicker cooling, producing a harder material with good flatness. BA refers to batch annealing, where coils are heat-treated in a furnace, resulting in a softer and more ductile material. For this product, both options are available, and we recommend selecting based on your forming method.
Q2: Is the 3.2g/m2 tin coating measured on one side or both sides?
A2: The value 3.2g/m2 can be interpreted as the nominal coating weight per surface, but please confirm your required standard and specification with our sales team. Coating weights can be adjusted upon request to match your application.
Q3: Can we order in small quantities for a trial?
A3: Yes, samples or trial orders are possible. We can supply a small quantity for you to test forming, printing, or lacquering performance. Please discuss the exact size and coating requirements with our export department.
Q4: What kind of packaging do you use for export?
A4: Tinplate sheets and coils are packed in water-resistant paper, then placed on wooden pallets or steel pallets, and secured with steel strapping. For sensitive surfaces, we can add protective paper or plastic film between layers.
Q5: Do you provide custom width or length cutting?
A5: Yes, we can slit coils into custom widths and shear sheets into custom lengths based on your order. Custom dimensions help reduce waste and improve production efficiency in your factory.
Q6: What is the usual lead time for shipment?
A6: Lead time depends on the quantity and specification. For common sizes, it is typically around 15-25 days after order confirmation. We will provide a precise schedule when you submit your inquiry.
Q7: Can this tinplate be used for food packaging?
A7: MR grade tinplate is commonly used for food cans and closures. However, food-contact suitability also depends on the final surface condition, the lacquer, and the regulations of your target market. Please verify the final requirements with your client or regulatory authority.
Q8: How do I get a quotation?
A8: Simply send us your required thickness, width, length, annealing type, surface finish, quantity, and destination port. Our sales team will respond with a detailed offer, including delivery terms and packaging details.
Contact Shandong Sino Steel Co., Ltd. today to request more information or a competitive quotation for this cold-rolled CA BA tinplate sheet. With our production capacity, export experience, and commitment to quality, we are ready to support your tinplate procurement needs.
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