10 steel (annealed and rolled) low carbon carbon steel metallographic structure

Low Carbon Steel with Annealed Rolling Microstructure

Low carbon steels with annealed rolling microstructure are metals made up largely of iron, but with smaller amounts of other elements such as manganese, titanium, chromium and molybdenum. These elements help to strengthen the metal and give it particular characteristics like corrosion resistance, hardness and wear resistance. The annealed rolling process adds structure, strength and toughness to the metal, making it an ideal choice for applications exposed to extreme environmental conditions.

The annealed rolling process of low carbon steels consists of heating the metal to temperatures that exceed 1000°C and then cooling it to near, but not at, room temperature. This process introduces strain and improves the microstructure of the metal, increasing its strength and toughness. The microstructure of annealed low carbon steel after rolling consists of ferrite and pearlite grains. Ferrite grains are formed in the matrix and the pearlite grains are a combination of ferrite and iron-carbon particles. The presence of the pearlite grains indicates that the metals carbon content has decreased below the eutectoid composition.

One of the benefits of annealing low carbon steels is greater uniformity in its final properties. Since the stiffness and strength of the metal are equalized, distortion remains low during production. This uniformity allows for more uniform behavior and more consistent performance, not just in terms of strength and stiffness, but also in other important characteristics such as corrosion resistance and wear resistance.

Low carbon steel with annealed rolling microstructure also has excellent weldability. Normal grade of mild low carbon steels with annealed rolling microstructure (d11), may be welded by most processes often without the need for preheating. The heat affected zone created by the welding process is softer than the base metal, making it easier for the arc to penetrate the metal and create a strong, stable joint.

The toughness of low carbon steel with annealed rolling microstructure also increases significantly. This increased toughness makes it difficult for any damage to occur and limits the amount of force that is able to assemble the metal parts. This reduction in the amount of force required to assemble the metal parts increases the efficiency of the assembly process.

Low carbon steel with annealed rolling microstructure is an ideal ferrous metal for a variety of applications because of its superior properties. Its uniform properties make it easier to work with and create higher quality parts. The toughness and strength makes it resistant to wear and corrosion. The weldability increases the efficiency of production processes as well as ensuring strong, reliable connections that do not require additional machining or post-machining repairs. The combination of these properties makes low carbon steel with annealed rolling microstructure a versatile and reliable choice for many industrial and manufacturing applications.

Low-carbon steels 10G2 features low-carbon steel with ferritic-pearlitic matrix structure, which is good for welding and forming operations. It has relatively low yield point and good cold-forming properties. It does not require heat treatment for its fabrication. The chemical composition for 10G2 steel consists 0.12～0.18 carbon (C), 0.30~0.70 silicon (Si), 0.40~0.80 manganese (Mn), 0.035 phosphor (P) and 0.04 sulfur (S).

With good hot forming, cutting and cold-forming properties, 10G2 steel is the most commonly used low-carbon steel grade. It can be easily manipulated and is used in many industrial sectors, such as construction, civil engineering, infrastructure, automotive and farm equipment.

The 10G2 steel is produced by rolling out the hot-rolled rolled material on cold-mill rolls and then annealing it in special ovens to avoid crystallization of the steel at ambient temperatures. The 10G2 material is then used in applications such as bolts, nails, screws, nuts and general rivets.

Apart from applications mentioned, the 10G2 steel can also be used for production of springs, fences, wire rods, and power lines that can be used for any type of use and for any environment.

In terms of its mechanical properties, 10G2 steel features high flexural strength and yield strength, low elongations and tensile strength. Its hardness is also low and it can be easily machined. The 10G2 steel is quite suitable for machining operations and in case of cold-working processes.

Moreover, 10G2 steel has good welding properties and a welding joint manufactured with 10G2 steel provides excellent energies. Its machinability is also quite satisfactory.

In conclusion, 10G2 steel is one of the most popular low-carbon steel grades and thanks to its versatile properties and applications it is used in variety of fields. From automotive and construction industry to power line building and power plants, 10G2 steel is recognized for its usability and toughness.