Alloy Steel AISI 5120 SCr420H

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 120000 m.t./month

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C	Si	Mn	Cr	S	P	Ni	Cu
0.18~0.24	0.17~0.37	0.50~0.80	0.70~1.00	≤0.035	≤0.035	≤0.030	≤0.030

Description	Carbon Steel Rod/Carbon Steel Bar,carbon steel rod,carbon steel shaft,mild steel bar, Mild steel shaft,ms bar
Material	ASTM	1005, 1006, 1008, 1010, 1015, 1020, 1025, 1030, 1035, 1040, 1045, 1050, 1055, 1060, 1065, 1070, 1080, 1084, 1016, 1022
DIN	Ck10, Ck15, Ck22, Ck25, Ck30, Ck35, Ck40,Ck45, Ck50, 30Mn4, 40Mn4
BS	040A04, 095M15, 045M10, 080A40, 045M10, 080M50
JIS	S09CK, S9CK, S10C, S15C, S20C, S25C, S30C, S35C, S40C, S45C, S50C, S55C, S58C, SB45, S30C, S40C, S45C, S53C
Standard	GB/T799, ASTM A29, A108, A321, A575, BS970, DIN1652, JIS G4051
Section shape	Round, square, hexagonal, flat, angle
Surface	Black painted, galvanized
Specifications	Round bar	Diameter: 4mm~1200mm
Angle bar	Size: 3mm20mm20mm~12mm800mm800mm
Square bar	Size: 4mm4mm~100mm100mm
Flat bar	Thickness: 2mm~100mm
Width: 10mm~500mm
Hexagonal	Size: 4mm~800mm
Length	2m, 4m, 5.8m, 6m, 11.8m, 12m or as required.

Company Information

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

FAQ

1, Your advantages?

professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

3, Factory or Trading Company?

CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.

4, Payment Terms?

30% TT as deposit and 70% before delivery.

Irrevocable L/C at sight.

5, Trading Terms?

EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.

Packaging & Delivery

1, Packaging: seaworthy package or as required

2, Delivery: 35-45 days or based on quantity

Q: How do you prevent rust on steel round bars?: There are various effective methods available to prevent rust on steel round bars. Here are some strategies you can utilize: 1. Employ a protective coating: An effective way to prevent rust is by applying a protective coating such as paint, varnish, or enamel. These coatings act as a barrier, preventing moisture and oxygen from reaching the steel surface and causing rust. 2. Opt for galvanization: Galvanizing steel round bars involves coating them with a layer of zinc. This process creates a protective barrier, as the zinc acts as a sacrificial anode, corroding instead of the steel. Galvanized steel is highly resistant to rust and is commonly used in outdoor applications. 3. Utilize powder coating: Powder coating is another effective method of preventing rust on steel round bars. In this process, a dry powder is electrostatically applied to the steel surface, which is then cured under heat. The resulting coating provides excellent protection against rust and corrosion. 4. Maintain regular cleaning and maintenance: To prevent rust, it is important to regularly clean your steel round bars and remove any dirt, moisture, or other corrosive substances. Additionally, applying a rust inhibitor or lubricant can further protect the steel from corrosion. 5. Ensure proper storage: Proper storage of steel round bars is crucial in reducing the risk of rust. It is advisable to store them in a dry and well-ventilated area, avoiding direct contact with the ground or moisture-prone areas. Using pallets or racks to keep the steel elevated and properly spaced can also help prevent rust formation. 6. Avoid exposure to harsh environments: Exposing steel round bars to harsh environments, such as saltwater or acidic chemicals, significantly increases the risk of rust. If feasible, it is recommended to protect the steel from prolonged exposure to these substances or consider using a more corrosion-resistant material in such conditions. By implementing these preventive measures, you can effectively minimize the likelihood of rust formation on steel round bars, ensuring their durability and preserving their structural integrity.

Q: Can steel round bars be threaded?: Yes, steel round bars can be threaded. Threading refers to the process of cutting threads onto the surface of a cylindrical object, such as a steel round bar, to create a screw-like shape. This allows the bar to be securely fastened into a corresponding threaded hole or to join with another threaded component. Threading can be done using different methods, such as manual threading with a die or using machine tools like lathes or thread rolling machines. The specific method used depends on the size and type of thread required. However, it is important to note that not all steel round bars are suitable for threading, as the material composition and hardness of the steel can affect the threading process. Therefore, it is recommended to consult with a professional or experienced personnel to ensure the steel round bar is suitable for threading and to determine the appropriate threading method.

Q: Can steel round bars be used for making springs or suspension components?: Yes, steel round bars can be used for making springs or suspension components. Steel is a commonly used material for these applications due to its high strength, durability, and ability to handle heavy loads. The round shape of the bars allows for easy fabrication into various spring designs or suspension components. Additionally, steel can be heat-treated to improve its elasticity and resistance to fatigue, which are important characteristics for springs and suspension systems. Overall, steel round bars provide a reliable option for manufacturing springs and suspension components that can withstand the demands of these applications.

Q: What are the different methods used for machining steel round bars?: There are several methods used for machining steel round bars, each with its own advantages and applications. Some of the commonly used methods include: 1. Turning: This is a widely used method that involves rotating the steel round bar against a cutting tool, which removes material and creates the desired shape. Turning is suitable for both external and internal operations and can achieve high precision and surface finish. 2. Milling: In milling, a rotating multi-tooth cutter removes material from the steel round bar to create flat or contoured surfaces. This method is versatile and can be used for various operations, including face milling, slotting, and profiling. 3. Drilling: Drilling involves creating holes in the steel round bar using a rotating drill bit. This method is commonly used for creating holes of different sizes and depths, and can be done manually or through automated processes. 4. Grinding: Grinding is a precision machining method that uses abrasives to remove material from the steel round bar. It is commonly used to achieve a smooth surface finish, tight tolerances, and precise dimensions. Grinding can be performed using various types of grinding machines, such as cylindrical grinders or surface grinders. 5. Boring: Boring is used to enlarge existing holes or create internal cylindrical shapes in the steel round bar. It involves rotating a cutting tool inside the bar to remove material and achieve the desired dimensions and surface finish. 6. Broaching: Broaching is a specialized machining method used to create complex internal or external shapes in the steel round bar. It involves using a broach, a multi-toothed cutting tool, that is pushed or pulled through the bar to remove material and create the desired shape. 7. Sawing: Sawing is a method used to cut the steel round bar into desired lengths or shapes using a rotating blade with teeth. This method is efficient for mass production and can be performed using manual or automated sawing machines. These are just a few of the methods used for machining steel round bars. The choice of method depends on factors such as the desired shape, dimensions, tolerances, and surface finish, as well as the production volume and available equipment.

Q: What is the difference between a turned and a polished steel round bar?: The surface finishes and properties of a turned steel round bar and a polished steel round bar are different as a result of separate processes they undergo. Typically, a turned steel round bar is created by removing material from the surface of a steel bar using a lathe machine. This process involves rotating the bar against a cutting tool, which cuts away the outer layer, leaving a smooth and cylindrical surface. Although the turned bar may have visible machining marks, it is generally known for its precise and uniform diameter compared to other types of steel bars. Turned bars are commonly used in applications where dimensional accuracy is crucial, such as in machinery or tooling. On the other hand, a polished steel round bar goes through a different process involving grinding or buffing the surface to achieve a smooth and reflective finish. Polishing eliminates any imperfections or roughness, resulting in a highly lustrous appearance. Polished bars are often utilized in decorative applications or where visual aesthetics play a significant role, such as in architectural designs or high-end consumer products. To summarize, the main distinction between a turned and a polished steel round bar lies in their manufacturing processes and resulting surface finishes. A turned bar is machined to achieve precise dimensions, while a polished bar undergoes a polishing process to obtain a smooth and reflective surface. The choice between the two depends on the specific requirements of the application, with turned bars being preferred for dimensional accuracy and polished bars for aesthetic appeal.

Q: What are the advantages of using oil-hardening steel round bars?: There are several advantages of using oil-hardening steel round bars. Firstly, these bars have excellent hardenability, meaning they can be hardened throughout their entire cross-section. This makes them highly suitable for applications where a high degree of hardness and strength is required. Secondly, oil-hardening steel round bars have good machinability, allowing for ease of cutting, drilling, and shaping. Additionally, they exhibit good wear resistance, making them ideal for applications involving friction and abrasion. Lastly, oil-hardening steel round bars offer good dimensional stability and can withstand high temperatures, ensuring their durability and reliability in various industrial settings.

Q: Are steel round bars available in different diameters?: Yes, steel round bars are available in a variety of diameters to suit different applications and requirements.

Q: What are the advantages of using heat-resistant steel round bars?: Heat-resistant steel round bars have several advantages. Firstly, they are designed specifically to maintain their mechanical properties even in high temperatures. This means they can remain strong and structurally sound in extreme heat conditions. Secondly, these round bars have exceptional resistance to corrosion. This makes them highly durable and suitable for environments where they may come into contact with corrosive substances or chemicals. Their resistance to corrosion ensures a longer lifespan and reduces the need for frequent maintenance or replacement. Additionally, heat-resistant steel round bars have superior thermal conductivity. This allows them to efficiently transfer heat, which is beneficial in industries like power generation or petrochemicals where heat transfer is crucial. Using heat-resistant steel round bars guarantees optimal performance and energy efficiency. Furthermore, these round bars offer excellent dimensional stability. Even when exposed to high temperatures, they retain their shape and size without warping or deforming. This is particularly important in applications that require precise measurements and tight tolerances. Lastly, heat-resistant steel round bars come in various sizes and grades, offering versatility in their applications. They can be used in industries such as aerospace, automotive, construction, and manufacturing, where high temperatures are involved. In conclusion, the advantages of using heat-resistant steel round bars include their ability to withstand high temperatures, resistance to corrosion, superior thermal conductivity, dimensional stability, and versatility in applications. These benefits make them an ideal choice for industries that require materials to perform reliably under extreme heat conditions.

Q: What is the tensile strength of a steel round bar?: The tensile strength of a steel round bar is influenced by a range of factors, including the grade of steel, the manufacturing process, and any additional treatments or coatings applied. Typically, steel round bars exhibit high tensile strength due to their composition and structural design. The specific tensile strength can vary significantly based on the grade of steel. For instance, low carbon steel generally has a tensile strength ranging from 400 to 550 MPa (megapascals), while high carbon steel can have a tensile strength of 700 to 1000 MPa or even higher. It should be noted that heat treatment processes like quenching and tempering can further enhance the tensile strength of a steel round bar, resulting in increased strength and hardness. Additionally, the addition of certain alloying elements such as chromium, nickel, and molybdenum can improve the tensile strength and other mechanical properties of steel. To accurately determine the precise tensile strength of a specific steel round bar, it is essential to refer to the manufacturer's specifications or consult relevant industry standards like ASTM or AISI standards. These standards offer comprehensive information on the mechanical properties, including tensile strength, for different steel grades.

Q: Can steel round bars be heat treated for improved strength?: Steel round bars can undergo heat treatment for enhanced strength. This treatment involves subjecting the steel to specific heating and cooling procedures to modify its microstructure and properties. The most common techniques used for heat treating steel round bars are quenching and tempering. During quenching, the steel round bar is heated to a high temperature and rapidly cooled by immersing it in a quenching medium like water, oil, or polymer. This rapid cooling aids in hardening the steel by transforming its microstructure into a tougher and stronger martensitic structure. Following quenching, the steel round bar is often tempered to reduce brittleness and increase toughness. Tempering includes reheating the quenched steel to a lower temperature and gradually cooling it. This process relieves the internal stresses formed during quenching and allows the steel to achieve a balance between hardness and toughness, resulting in improved strength. It is important to consider that the specific heat treatment process and parameters rely on the type and grade of steel used. Therefore, it is advisable to consult with a metallurgical expert or refer to the manufacturer's guidelines to determine the appropriate heat treatment process for a specific steel round bar and achieve the desired strength improvement.

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