What is DD12 steel?

DD12 is a European standard EN 10111 steel grade, which belongs to the pickling cold plate, and it corresponds to the German standard (DIN) steel grade StW23. DD12 steel has excellent ductility, weldability and surface quality, and is suitable for blanking, forming and other processing processes.

DD12 cold-rolled steel plate is the abbreviation of ordinary carbon steel cold-rolled thin plate, also known as cold-rolled plate, commonly known as cold-rolled plate, sometimes mistakenly written as cold-rolled plate. The cold plate is a steel plate with a thickness of less than 4mm made of ordinary carbon structural steel hot-rolled strip steel and further cold-rolled. Due to rolling at room temperature, no iron sheet will be produced, so the cold plate has good surface quality, high dimensional accuracy, coupled with annealing treatment, its mechanical properties and process performance are superior to hot-rolled steel plates, in many aspects, especially in household appliances In manufacturing, it has been gradually replaced by hot-rolled steel plates.

Composition of DD12 Pickling Cold Plate

The composition of DD12 pickling cold plates is an important aspect to consider when choosing the right material for your project. Made of mild steel, this steel plate is highly malleable and easily molded into various shapes.

DD12 Pickled Cold Plate also contains Silicon, Manganese, Phosphorus and Sulfur - all important elements that contribute to its strength and durability. These elements work together to create a strong yet flexible material suitable for high-stress applications.

The specific ingredients are as follows:

How about the mechanical properties of DD12 pickling cold-rolled steel sheet?

DD12 pickled cold-rolled steel plate is a low-carbon steel plate with excellent mechanical properties. Specifically, its mechanical properties are mainly manifested in the following aspects:

Tensile strength: The tensile strength of DD12 pickled cold-rolled steel plate is generally between 270-410MPa, which has good strength.

Yield strength: The yield strength of DD12 pickled cold-rolled steel plate is generally between 170-360MPa, and it has good plasticity and formability.

Elongation: The elongation of DD12 pickling cold-rolled steel plate is generally above 30%, and it has good toughness and crack resistance.

Impact toughness: DD12 pickled cold-rolled steel plate has good impact toughness and can withstand large impact loads.

In general, DD12 pickled cold-rolled steel sheet has good mechanical properties, and is suitable for manufacturing fields that require high mechanical properties, such as automobile manufacturing, machinery manufacturing, and electronic manufacturing.

Dimensions of DD12 pickling cold plate

The size range of DD12 (StW23) is as follows, and can also be customized according to your needs:

Thickness: 0.2-4mm,

Width: 600-2000mm,

Length: 1200-6000mm.

What are the characteristics of DD12 pickling cold plate?

DD12 pickling cold plate mainly uses low-carbon steel, which requires good cold bending and welding performance, as well as some stamping performance. The characteristics of DD12 steel mainly include the following aspects:

Excellent ductility: DD12 steel has high ductility and is suitable for stamping, deep drawing and other processing processes, and can meet the manufacturing needs of some products that require high formability.

Good weldability: DD12 steel can be connected and processed by various welding methods, and at the same time, it is not prone to problems such as cracking and embrittlement, ensuring the quality and reliability of the product.

High surface quality: After fine rolling, pickling and other processing, DD12 steel has a good surface quality without obvious defects and stains, which can improve the aesthetics and texture of the product.

Stable mechanical properties: DD12 steel has stable mechanical properties such as tensile strength, yield strength and elongation, which can meet the needs of different fields.

Process characteristics of DD12 pickling cold plate

After cleaning with hydrochloric acid and iron oxide on the hot-rolled steel plate to obtain a beautiful, smooth surface. After forming, the surface of the steel plate tends to be more cold-rolled.

By pickling the oxide skin on the surface of the steel plate, the surface defects of the steel plate are easily exposed, so the main problem of ensuring a high-quality surface is the issue that should be considered in the production process control.

What is the heat treatment of DD12 pickling cold-rolled sheet?

DD12 pickling cold-rolled sheet is a low-carbon steel sheet, and its heat treatment methods mainly include annealing and normalizing.

Annealing treatment: The annealing temperature of DD12 pickling cold-rolled sheet is about 650°C, and the holding time depends on the thickness of the sheet. After annealing, scale and rust will be produced on the surface of the steel plate, and surface cleaning is required.

Normalizing treatment: The normalizing temperature of DD12 pickling cold-rolled sheet is between 800-900°C, and the holding time is also determined according to the thickness of the sheet. After normalizing, the hardness, strength and ductility of the steel plate will be improved, and it is suitable for fields with high mechanical performance requirements.

It should be noted that before heat treatment, it is necessary to degrease and decontaminate the steel plate to ensure that the surface of the steel plate is clean and pollution-free, and to reduce possible surface defects and pores.

In general, the heat treatment method of DD12 pickling cold-rolled sheet can choose different temperature and time according to the specific requirements, so as to meet the requirements of different fields for the performance of the steel sheet.

What is the use of DD12 pickling cold rolled sheet?

DD12 pickling cold-rolled sheet is a thin steel sheet commonly used in the manufacturing industry, and its thickness is generally below 0.5mm. Because of its good surface quality, high dimensional accuracy, excellent mechanical properties and good processing performance, it is widely used in many fields, including:

Electronic manufacturing: as the shell material of electronic products, such as mobile phone shell, laptop shell, flat-screen TV, etc.

Communication equipment manufacturing: as communication equipment casing materials, such as antennas, microwave equipment, satellite communication equipment, etc.

Home appliance manufacturing: As the shell material of home appliances, such as refrigerators, ovens, microwave ovens, etc.

Construction industry: as building materials, such as steel structure, partition board, fireproof board, etc.

Other fields: It can also be used in the manufacture of railway equipment, ship equipment, pressure vessels, petrochemical equipment and other fields.

Generally speaking, DD12 pickled cold-rolled sheet is suitable for many fields. Its high quality, high precision, excellent mechanical properties and easy processing make it one of the ideal raw materials for many industrial products.

The difference between DD12 pickling cold-rolled sheet and DD11 cold-rolled sheet

The difference between DD12 pickling cold-rolled sheet and DD11 cold-rolled sheet lies in the manufacturing process and material properties. DD12 pickling cold-rolled sheet is a product obtained after pickling on the basis of DD11 cold-rolled sheet.

Specifically, DD12 pickling cold-rolled sheet is made by pickling DD11 cold-rolled sheet to remove surface oxide and black scale, and then deep cold-rolled. Compared with DD11, DD12 has higher surface finish, better dimensional accuracy, stronger corrosion resistance and better welding performance.

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