Steel Round Bar Reliable Manufacturers from China

Steel Round Bar Reliable Manufacturers from China System 1

Steel Round Bar Reliable Manufacturers from China

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 554 m.t.

Supply Capability:: 2000000 m.t./month

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Description of steel round bar:

1. Commodity: Round steel bar

3. Technical: Hot rolling
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm

Festures of steel round bar:

1.Dia 80-800mm Length:2000-13000mm or as required
2.Technique:Forged
3.Delivery Time:45 days

Specifications of steel round bar:

1. Standards: AISI 4340 8620 8640 4320 , JIS SNCM8 GB:40CrNiMoA

2. Specification: Dia: 80~450mm Length:2000-13000mm or as required

The highest temperature is 427 degrees Celsius.it has good strength,and high quenching property ,the toughness is good and small deformation during quenching.At high temperature.

C	Si	Mn	S	P	Cr	Ni	Cu	Mo
0.37-0.44	0.17-0.37	0.40-0.80	0.025(max)	0.025(max)	0.60-0.90	1.25-1.65	0.025(max)	0.15-0.25

Images of steel round bar:

FAQ:

1. What is your package?

Packing situation: standard seaworthy packing or as customer required.

2. How long is the lead time?

Delivery time: 45 days after order confirmed.

3. What payment term do you accept?

Payment: T/T or L/C at sight.

Q:Can steel round bars be used in the production of HVAC equipment?: Certainly, HVAC equipment production can indeed make use of steel round bars. In the manufacturing of diverse HVAC components such as air ducts, frames, supports, brackets, and other structural elements, steel round bars find extensive application. Steel is widely preferred in HVAC equipment owing to its exceptional strength, durability, and resistance to corrosion. Its high tensile strength ensures its suitability in handling the mechanical stresses and loads encountered by HVAC systems. Furthermore, steel can endure high temperatures and is non-combustible, rendering it a secure material for HVAC purposes. On the whole, the reliability, longevity, and performance of steel round bars make them extensively employed in HVAC equipment production.

Q:How are steel round bars heat treated?: Steel round bars are heat treated to increase their strength and hardness while also improving their mechanical properties. The heat treatment process typically involves three main steps: heating, soaking, and cooling. Firstly, the steel round bars are heated to a specific temperature, known as the austenitizing temperature. This temperature is usually above the critical temperature of the steel, which allows the material to transform into its austenite phase. The austenitizing temperature varies depending on the type of steel and the desired properties. Once the steel round bars reach the austenitizing temperature, they are soaked at this temperature for a specific duration. The soaking time allows for the complete transformation of the microstructure, ensuring uniformity and avoiding any thermal gradients within the material. The soaking time is crucial in determining the final properties of the steel. After the soaking period, the steel round bars are rapidly cooled in a process called quenching. Quenching is typically done by immersing the bars in a quenching medium, such as oil, water, or air, depending on the desired hardness and properties. The quenching process rapidly cools the bars, causing a martensitic transformation in the steel's microstructure. This transformation results in increased hardness and strength. Following quenching, the steel round bars may undergo an additional step called tempering. Tempering involves reheating the bars to a lower temperature, typically below the austenitizing temperature. This step aims to reduce the brittleness caused by the quenching process while further improving the material's toughness and ductility. Overall, the heat treatment process for steel round bars involves heating to the austenitizing temperature, soaking for a specific duration, quenching to rapidly cool and harden the material, and potentially tempering to achieve the desired properties. This process allows for the customization and enhancement of the steel's mechanical properties, making it suitable for various applications.

Q:How to make the round welds on flat steel flat and qualified?: If it is full weld, for strong, don't groove. There must be no problem with the welding. If you hit the groove, it will deform. When welding, you should do spot welding and diagonal welding. I think you should be able to understand this, but I don't know what you are using for it,

Q:How are steel round bars used in the manufacturing of mining equipment?: Steel round bars are commonly used in the manufacturing of mining equipment due to their high strength and durability. These bars are often utilized as a key structural component in the construction of heavy machinery such as crushers, drilling rigs, and conveyor systems. They provide the necessary support and stability required to withstand the harsh operating conditions and heavy loads typically encountered in mining operations. Additionally, steel round bars can be machined and shaped to create various components such as shafts, pins, and gears, further enhancing the functionality and reliability of mining equipment.

Q:What are the different types of steel round bar surface finishes for improved cleanliness?: There are several types of steel round bar surface finishes that can be used to improve cleanliness. 1. Bright Surface Finish: This is achieved by polishing the steel round bar, resulting in a smooth and reflective surface. Bright surface finishes are commonly used in applications where cleanliness and appearance are important, such as in the manufacturing of kitchen appliances or decorative items. 2. Satin Finish: This finish is achieved by brushing the steel round bar with fine abrasive pads, resulting in a smooth and matte surface. Satin finishes are often used in applications where a clean and modern aesthetic is desired, such as in architectural designs or furniture manufacturing. 3. Pickled Finish: This finish involves immersing the steel round bar in an acid solution, which removes any impurities or oxides from the surface. Pickled finishes are commonly used in applications where the steel round bar will be further processed, such as in the production of pipes or tubes. 4. Passivated Finish: This finish involves treating the steel round bar with a chemical solution, which forms a protective oxide layer on the surface. Passivated finishes are used to enhance the corrosion resistance of the steel round bar, making it suitable for applications in harsh or corrosive environments. 5. Shot Blasted Finish: This finish involves propelling small metal or ceramic particles at high velocity onto the surface of the steel round bar. Shot blasting removes any scale, rust, or surface contaminants, resulting in a clean and textured surface. Shot blasted finishes are commonly used in applications where a good bond between the steel round bar and another material, such as paint or coating, is required. Overall, the choice of steel round bar surface finish depends on the specific application and the desired level of cleanliness. Each finish offers unique properties and benefits, allowing for improved cleanliness and performance in various industries.

Q:Can steel round bars be hot worked?: Yes, steel round bars can be hot worked.

Q:Can steel round bars be hardened or tempered?: Steel round bars have the capability to be hardened or tempered. To harden them, the steel is heated to a specific temperature and then rapidly cooled, often by quenching it in water or oil. This treatment boosts the steel's hardness and strength, making it more resistant to wear and deformation. On the other hand, tempering involves reheating the hardened steel to a lower temperature and then cooling it gradually. This process decreases the steel's brittleness and enhances its toughness and ductility. Both hardening and tempering can be applied to steel round bars to achieve desired mechanical properties for different applications.

Q:What are the different types of steel round bar heat treatments?: Steel round bars can undergo several types of heat treatments, each aiming to enhance specific material properties. Common heat treatments include annealing, normalizing, quenching and tempering, and case hardening. 1. Annealing involves heating the steel round bar to a high temperature and gradually cooling it to room temperature. This process relieves internal stresses, improves machinability, and enhances ductility and toughness. 2. Normalizing, similar to annealing, requires heating the steel round bar to a specific temperature. However, instead of slow cooling, the bar is left to cool in air. Normalizing refines the grain structure, improves mechanical properties, and enhances machinability. 3. Quenching and tempering entails heating the steel round bar to a high temperature and rapidly cooling it using a quenching medium like oil or water. This rapid cooling achieves high hardness and strength. Subsequently, the steel is tempered by reheating it to a lower temperature, enhancing toughness and reducing brittleness. 4. Case hardening is employed to increase the surface hardness of the steel round bar while maintaining a tough core. This treatment involves heating the bar in the presence of carbon-rich substances like gas or liquid carburizing agents. It results in a hardened outer layer, known as the case, while the core remains relatively softer and more ductile. These examples demonstrate the various heat treatments applicable to steel round bars. The choice of heat treatment depends on the desired properties and applications of the steel. Consulting with metallurgical experts ensures the selection of the most appropriate treatment for each specific steel round bar.

Q:Can steel round bars be used in manufacturing equipment?: Yes, steel round bars can be commonly used in manufacturing equipment due to their high strength, durability, and versatility. They are often utilized as structural components, axles, shafts, and other critical parts in various industries such as automotive, construction, and machinery.

Q:Are steel round bars resistant to UV radiation?: No, steel round bars are not inherently resistant to UV radiation.

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