AISI 4140 42CrMo4 Alloy Steel Round Bar System 1

AISI 4140 42CrMo4 Alloy Steel Round Bar System 2

AISI 4140 42CrMo4 Alloy Steel Round Bar System 3

AISI 4140 42CrMo4 Alloy Steel Round Bar System 4

AISI 4140 42CrMo4 Alloy Steel Round Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t.

Supply Capability:: 100000 m.t./month

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AISI 4140 42CrMo4 Alloy Steel Round Bar

Specifications

1. Delivery condition: Hot-rolled,black surface

2. Chemical composition: C:0.38~0.45 Si:≤0.40 Mn:0.60~0.90 S:≤0.035 P:≤0.035 Cr:0.90~1.20 Ni:≤0.030 Cu:≤0.030 Mo:0.15~0.30

C	Si	Mn	P	S	Cr	Mo
0.38-0.45	≤0.4	0.6-0.9	≤0.035	≤0.030	0.9-1.2	0.15-0.30

3.Process: EAF + LF + VD + Forged + Heat Treatment (optional)

4.Delivery condition: Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)

5.Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing

6.Test: ultrasonic test according to SEP 1921-84 3 D/D

7. Material details will be as per agreed technical specifications

Equipment

We are well-equipped with 2000-Ton Hydraulic press, 15-Ton Hydraulic manipulator, various kinds of Lathe and boring machine, product range OD 200mm-800mm, Length less than 9m.

AISI 4140 42CrMo4 Alloy Steel Round Bar

Products

AISI 4140 42CrMo4 Alloy Steel Round Bar

Q: Grade 1 steel is round steel, grade two steel is ribbed thread steel. Are the weight of the two units the same?: Grade two steel is ribbed steel, but the average diameter is calculated. The chemical composition of grade steel and grade two steel is different, but the density of them is the same. Therefore, the unit weight of grade 1 steel and grade two steel is the same.

Q: What is the difference between a peeled and a centerless ground steel round bar?: A peeled steel round bar involves the removal of the outer surface to achieve a smooth and precise finish. This is typically done using a peeling machine. The purpose of this process is to eliminate any imperfections or scale on the bar's surface, resulting in a polished appearance. Additionally, the peeled round bar goes through a sizing process to ensure accurate dimensions. This makes it suitable for various applications where a smooth surface and precise dimensions are important. In contrast, a centerless ground steel round bar is achieved through the use of a centerless grinding machine. This process entails feeding the bar through grinding wheels that rotate at different speeds. Material is removed from the outer diameter of the bar to attain the desired size and surface finish. Centerless grinding offers tight tolerances and precise sizing, making it suitable for applications that demand high precision and accuracy. In summary, the primary distinction between a peeled and a centerless ground steel round bar lies in the method employed to achieve the desired surface finish and dimensional accuracy. While both processes result in a smooth and precise bar, peeling eliminates material from the outer surface, whereas centerless grinding removes material from the outer diameter. The choice between the two depends on the specific requirements of the application, as well as the desired surface finish and dimensional accuracy.

Q: How are steel round bars used in the manufacturing of heat exchangers?: Due to their unique properties, steel round bars are commonly utilized in the production of heat exchangers. These devices are responsible for transferring heat between multiple fluids, and the inclusion of steel round bars is essential to their construction. One primary application of steel round bars in heat exchangers is in the manufacturing of the tubes. These tubes are responsible for carrying the fluids that require heating or cooling. Steel round bars are frequently chosen as the base material for these tubes due to their exceptional heat transfer properties and high strength. The round shape of the bars facilitates the easy fabrication of the tubes, ensuring a secure and snug fit. Moreover, steel round bars are utilized in the construction of the headers and tube sheets in heat exchangers. The headers enable the fluid to enter and exit the heat exchanger, while the tube sheets hold the tubes firmly in place. These components must possess durability and high strength to withstand the pressure and temperature differentials encountered during heat exchange. Steel round bars provide the necessary stability and strength to ensure the proper operation of the heat exchanger. Furthermore, steel round bars are also employed in the manufacturing of the support structures or frames of heat exchangers. These structures offer stability and support to the various components of the heat exchanger, ensuring proper alignment and positioning. Steel round bars exhibit excellent structural integrity and can endure heavy loads, making them an ideal choice for this purpose. In summary, steel round bars play a vital role in the production of heat exchangers. Their high strength, excellent heat transfer properties, and durability make them well-suited for fabricating the tubes, headers, tube sheets, and support structures of heat exchangers. By incorporating steel round bars, manufacturers can guarantee the efficiency, effectiveness, and longevity of heat exchangers in numerous industries, including power generation, chemical processing, and HVAC systems.

Q: What are the factors to consider when selecting a steel round bar for a specific application?: When choosing a steel round bar for a particular application, there are several key factors that need to be taken into account. Firstly, the material grade of the steel round bar is of utmost importance. Different grades of steel have different properties, such as strength, hardness, and resistance to corrosion. It is crucial to select a material grade that is suitable for the specific requirements of the application. Secondly, the mechanical properties of the steel round bar, such as tensile strength, yield strength, and elongation, need to be carefully evaluated. These properties determine how well the bar can withstand forces and deformations under load. It is important to choose a steel round bar with mechanical properties that are compatible with the demands of the application. The size and dimensions of the steel round bar also play a critical role. This includes considering the diameter, length, and tolerance requirements. The dimensions should be chosen based on the structural needs of the application and the desired load-bearing capacity of the bar. The surface finish of the steel round bar is significant, particularly in applications where aesthetics or contact with other components are important. Factors such as smoothness, roughness, and the presence of coatings or treatments should be taken into account. Depending on the environment in which the application will be used, it is crucial to select a steel round bar with adequate corrosion resistance. Factors such as exposure to moisture, chemicals, or extreme temperatures can impact the bar's performance and longevity. Options like stainless steel or corrosion-resistant coatings can be considered to enhance the bar's resistance to corrosion. If the steel round bar needs to be machined or fabricated into a specific shape, its machinability must be considered. Some steel grades are easier to machine than others and may require different tools or techniques. It is important to choose a bar with a machinability that aligns with the desired manufacturing processes. Lastly, the cost of the steel round bar should not be overlooked. Different material grades and specifications come with varying price points. It is important to strike a balance between the required properties and performance of the bar and the budget constraints of the project. In conclusion, selecting a steel round bar for a specific application necessitates careful consideration of the material grade, mechanical properties, size, surface finish, corrosion resistance, machinability, and cost. By taking these factors into account, one can ensure that the chosen steel round bar will meet the requirements of the application and deliver optimal performance.

Q: Can steel round bars be used for making tools or machinery parts?: Yes, steel round bars can be used for making tools or machinery parts. Steel round bars are commonly used in the manufacturing industry due to their high strength, durability, and ability to withstand heavy loads. They can be machined, forged, or welded into various shapes and sizes to create different tools and machinery parts.

Q: Will the three steel is steel? It is a steel bar?: Your question is inaccurateThread steels are grade two, grade three, grade four, and even grade fiveFirst grade steel generally refers to the wire rod, also known as wire rod, is a ribbed steel bar

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: Are steel round bars resistant to corrosion?: The corrosion resistance of steel round bars can vary depending on the type of steel and the environment in which they are placed. For instance, stainless steel round bars consist of chromium, which creates a protective layer on the surface, shielding against corrosion. This protective layer is capable of self-repair and offers exceptional resistance to corrosion in various environments, such as those with moisture, chemicals, or saltwater. Conversely, carbon steel round bars do not possess inherent corrosion resistance and might necessitate additional protective coatings or treatments to prevent corrosion. Hence, it is crucial to consider the specific steel type and intended application when evaluating the corrosion resistance of steel round bars.

Q: How do steel round bars compare to wood round bars?: Steel round bars have several advantages over wood round bars. Firstly, steel is much stronger and more durable than wood, making steel round bars a more reliable and long-lasting option. Steel round bars also have higher tensile strength, meaning they can withstand greater force without breaking. Additionally, steel is resistant to moisture, rot, and pests, making it a better choice for outdoor or high-moisture environments. On the other hand, wood round bars may be preferred in certain applications for their natural aesthetic appeal and lower cost. Overall, steel round bars offer superior strength, durability, and resistance to environmental factors compared to wood round bars.

Q: What are the different treatments available for steel round bars?: There are several different treatments available for steel round bars, including heat treatment, surface treatment, and coating. Heat treatment involves processes such as annealing, quenching, and tempering to improve the material's strength, hardness, and ductility. Surface treatments, such as polishing, grinding, or shot blasting, are used to enhance the surface finish and remove any imperfections. Coatings, such as galvanizing or painting, provide protection against corrosion and improve the overall appearance of the steel round bars.

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