ST12 – ASTMA1008CS Plate SPCC Carbon Sheet Coil Factory Direct Supply

Product name Carbon Steel Sheet
Thickness 0.1-60mm (Or as custom’s request)
Width 1250-2500mm (Or as custom’s request)
Steel Grade st12
Technique hot rolled cold rolled (as custom’s request)
Container Size 20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
Application steel plate are widely used in shipping building,engineer construction,
mechanical manufacturing

Product Introduction

ST12 is a commonly used low carbon structural steel in China. It belongs to the category of ordinary carbon cold rolled carbon structural steel, and its chemical composition and mechanical properties are regulated by the Chinese national standard GBT 5213-2008. 


Cold-rolled coils are made of hot-rolled coils, which are rolled at room temperature below the recrystallization temperature, including plates and coils. Since there is no heating during the production process, there are no defects such as pits and scales that often occur in hot rolling, and the surface quality is good and the finish is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and structure of the products can meet some special requirements for use, such as electromagnetic properties and deep drawing properties.  


ST12 is equivalent to ASTMA1008CS in the United States, and SPCC in Japan JIS standards. It is the most common steel grade, which is basically the same as Q195 and DC01 grades.


ST12 carbon steel has the following general characteristics:


1)Low Carbon Content: ST12 steel belongs to the category of normal cold rolled carbon steel. The carbon content in st12 is generally less than 0.10%, it is the most common and basic steel grade. In principle (steel factory regulations) it can only be bent and formed, and stamping is not allowed.


2)Good Weldability: ST12 steel can be easily welded using common welding methods such as arc welding, resistance welding, and gas welding.


3)High Strength: Although it is a low carbon steel, ST12 has relatively high tensile strength, with a yield strength of 280 MPa and a tensile strength of 270-410 MPa, elongation after breaking ≥ 28%.



4)Excellent Plasticity: ST12 steel exhibits good plasticity, allowing it to be formed into various shapes and structures without fracturing.


  • Wide Application: ST12 steelis widely used in general structural and engineering purposes, including construction, bridges, machinery manufacturing, transportation equipment, automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans and other industries where strength and durability are required.

ST12 Steel Chemical Composition:


Composition (%)












ST12 has a wide range of applications in various industries due to its good mechanical properties and affordability. Some common applications of ST12 include:


1)Construction: ST12 is extensively used in the construction industry for various structural components, such as beams, columns, and frameworks. It is suitable for both residential and commercial construction projects.


2)Bridges: ST12 is commonly used for bridge construction, including the fabrication of bridge girders, piers, and structural supports. Its high strength and good weldability make it suitable for bridge applications.


3)Machinery Manufacturing: ST12 is employed in the manufacturing of machinery and equipment components, such as frames, chassis, and structural parts. Its versatility and easy machinability make it a preferred choice for various machinery applications.


4)Automotive Industry: ST12 is utilized in the automotive industry for the production of components like car frames, chassis, and structural parts. Its high strength and good formability make it suitable for automotive applications.


  • Railway Vehicles: ST12is also used in the manufacturing of railway vehicles, including railcar bodies, underframes, and structural components. Its mechanical properties and durability meet the requirements of the railway industry.


6)General Fabrication: ST12 is widely utilized in general fabrication processes where a low carbon steel with good mechanical properties is required. It can be formed, welded, and machined to create various structures and components.

Classification By Size

The length is generally 2440mm, 2000mm, 3050mm, 4000mm, 3000mm, and the thickness is distinguished by cold rolling and hot rolling. Cold rolling mainly has thickness 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm. The main thickness of hot rolling is 3.0mm, 4.0mm, 6.0mm, 8.0mm, 10.0mm, and the width is generally 1000mm, 1219mm, 1500mm.Please contact customer service for general specifications.

Hot-rolled products have excellent properties such as high strength, good toughness, easy processing and good weldability, so they are widely used in manufacturing industries such as steel, construction, machinery, boilers, and pressure vessels. Application range: (1) After annealing, it is processed into ordinary cold rolling; (2) The galvanizing unit with pre-annealing treatment device processes galvanizing; (3) Panels that basically do not need to be processed.

Hot-rolled coils (in the form of flat plates or coils) generally have a thickness of 2.0-13.5mm, of which the price of 2.0-3.0mm hot coils gradually decreases from thin to thick; most steel mills have a basic price of 3.1mm-13.5mm Equivalent, the price of 3.1-4.0mm and 9.5mm-13.5mm hot plate coils in some manufacturers and markets may be higher than the price of 4.0mm-9.5mm plates. Hot plate coils represent products with a thickness of 5.5mm. Under normal circumstances, the price of flat plates is slightly higher than the price of coils.

Why Choose Us?

*Top 20 companies in steel industry trade volume.

*Customized processing steel one-stop purchase.

*Exports of steel exceeded tens of billions for 5 consecutive years.

**We have a complete set of testing equipment, such as ut & ET, hydraulic testing equipment, spectrometer, scanning electron microscope, etc, and have passed SGS TUV

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