What is plain round steel? Characteristics and applications of plain round steel
Steel is a material that is widely used in the construction field because of its many outstanding advantages. Today, there are many types of steel on the market, of which “plain round steel” is widely used and popular. To better understand “plain round steel”, Trung Dung Steel will help you have a more general view through the article below:
1. What is plain round steel?
Plain round steel, also known as plain round steel bar, is a type of steel in the form of a round bar with a smooth surface, without ribs or grooves, made from high-quality carbon steel alloy or stainless steel. This is one of the popular types of steel bars and is widely used in many different applications.
2. Types of plain round steel
2.1 Hot rolled plain round steel
Mechanical properties
High tensile strength: Hot rolled plain round steel has good tensile strength, suitable for applications that require load-bearing capacity.

Good toughness: The hot rolling process gives the steel a high toughness, allowing it to withstand impact forces without breaking or deforming.
Good tensile strength: This characteristic makes hot rolled plain round steel ideal for applications in construction and load-bearing structures.
Surface: Rough and scaly surface: Due to the high temperature rolling process, the surface of hot rolled plain round steel often has scaly iron and is not as smooth as cold rolled steel. This scaly iron can be removed by surface treatments if necessary.
Size and shape
Uniformity: Hot rolled plain round steel has a uniform diameter from end to end.
Various sizes: Available in a variety of diameters, from a few millimeters to a few tens of millimeters, and lengths typically ranging from 6 meters to 12 meters.
2.2 Cold rolled plain round steel
High precision: Cold rolled plain round steel often has more precise dimensions and roundness than hot rolled steel due to the manufacturing process.
Smooth surface: Cold rolled products often have smoother and brighter surfaces because they are not oxidized at high temperatures as in the hot rolling process.

High hardness: Due to the cold rolling process, plain round steel has higher hardness than hot rolled steel, which helps to increase its bearing capacity and tensile strength.

High mechanical strength: Cold rolled plain round steel has good bearing capacity and mechanical strength, suitable for many applications requiring high strength.
Good machinability: With a smooth surface and high precision, cold rolled plain round steel is easy to process mechanically such as turning, milling, and grinding.
2.3 Stainless plain round steel (Inox)
Composition: Alloy of steel with chrome and nickel, has good corrosion resistance.Characteristics
High corrosion resistance: Stainless steel has excellent corrosion resistance, thanks to the presence of chromium compounds (minimum 10.5%), which create a protective oxide layer on the steel surface.
High strength and ductility: Stainless steel has high mechanical strength, while maintaining good ductility and machinability, suitable for many applications requiring complex shapes and high strength.
Highly polished, aesthetically pleasing surface: With a shiny and aesthetically pleasing surface, stainless steel is often used in applications requiring a beautiful appearance, such as interior decoration and household appliances.
Good heat resistance: Stainless steel is capable of withstanding high temperatures without losing its mechanical properties, making it suitable for heat-resistant applications.
Good weldability: Stainless steel has good weldability, allowing the connection of parts without reducing the strength and properties of the material.
Chemical resistance: Stainless steel does not react with many chemicals, making it suitable for applications in chemical and medical environments.
Common types of stainless steel
Austenitic (stainless steel 300 series): Contains a lot of chrome and nickel, has high corrosion resistance, is tough, and is often used in household appliances, decoration, and the food industry.
Ferritic (stainless steel 400 series): Contains high chrome but low nickel, is not as durable as austenitic but is cheaper, and is often used in the production of household appliances and automobile exhaust pipes.
Martensitic: Contains high chrome and carbon, has good strength and wear resistance, and is often used in cutting tools and knives.
2.4 Alloyed round steel
Alloyed round steel is a type of steel whose chemical composition is improved by adding alloying elements such as nickel, chrome, manganese, vanadium, and other elements to improve the mechanical and chemical properties of the material. Here are the main characteristics of alloyed round steel:
High strength: Alloy steels typically have higher tensile strength and hardness than non-alloyed steels, due to the interaction between the alloying elements and the steel matrix.
Wear and corrosion resistance: Alloy steels typically have better wear and corrosion resistance, thanks to the addition of elements such as chrome, nickel, and molybdenum.
Good machinability: With improved crystal structure and evenly dispersed alloying elements, alloy steels have good machinability, allowing the production of complex and precise parts.
Good heat resistance: Some alloy steels have high heat resistance and maintain mechanical properties at high temperatures, making them suitable for applications that require heat resistance.
Various applications: Alloyed round steels are widely used in industries such as automotive, aerospace, shipbuilding, oil and gas industry, and machinery manufacturing applications.
Special Features: Some alloy steels have special features such as high pressure resistance, impact resistance, and high impact resistance, making them suitable for special applications in harsh conditions.
Common Alloy Steels
Structural Alloy Steels: Includes high-strength steels used for structural parts in construction, bridges, and heavy equipment.
Tool Alloy Steels: Used to produce cutting tools, drills, grinders, and other metalworking tools.
Stainless Steel Alloys: A group of alloy steels with good corrosion resistance, commonly used in the food, chemical, medical, and harsh environment industries.
Thanks to the combination of mechanical and chemical properties of the alloying elements, alloy plain steels are important materials in many industries, providing high performance and durability for different applications.

3. Applications of plain round steel
Mechanical engineering: Plain round steel is widely used in the mechanical industry to manufacture machine parts, load-bearing parts, machine shafts, crankshafts, and impact-resistant parts.
Construction and industrial construction: In the construction industry, plain round steel is often used to make piles, beams, columns, water pipes, and other structural components.
Automotive industry: Plain round steel is used to manufacture automobile parts such as wheel axles, crankshafts, chassis parts, and other mechanical parts in car manufacturing and maintenance.
Oil and gas industry: In the energy industry, plain round steel is used to manufacture oil pipes, drilling equipment, and other technological parts.
Aerospace and aviation industry: Plain round steel can be used in the manufacture of engine parts, aircraft fuselages, and other applications in the aviation industry.
Food and medical industry: Plain round stainless steel is a special type of steel used in the food and medical industry to manufacture medical equipment, food containers, surgical instruments, and other products that require high hygiene properties.

Electronics and refrigeration industry: Plain round steel is also used to manufacture parts in the electronics and refrigeration industry such as protective components, joints, and welds.

Applications in art and decoration: Plain round steel can also be used in interior decoration applications, decorative parts, railings, windows, and other works of art.

4. Summary
Plain round steel is considered a basic and important material in many industries thanks to its versatility, durability, and strength, suitable for diverse applications from industrial production to construction and decoration.
After more than 28 years, Trung Dung Steel is proud to be a high-end distributor of major steel manufacturing brands such as: Southern Steel, Pomina Steel, Hoa Phat Steel, VAS Steel, Tung Ho Steel, etc. We are committed to always accompanying and building strong trust for customers with the “Prestige – Dedication – Professionalism” of a high-end distributor to bring the best quality steel products quickly to customers.