aisi 4140 carbon alloy steel round bars System 1

aisi 4140 carbon alloy steel round bars System 2

aisi 4140 carbon alloy steel round bars System 3

aisi 4140 carbon alloy steel round bars System 4

aisi 4140 carbon alloy steel round bars

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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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GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

Product Name	Typical Grades	Diameter(mm)	Standard adopted
Carbon Steel	20 (1020/S20C/C22)	Ø16-Ø300	GB/SAE/JIS/DIN
40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing Steel	GCr9 (51100/SUJ1)	Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)
Cr-Mo Steel	20Cr (5120/SCr420H/20Cr4)	Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel	20CrNiMo	Ø16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)

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:What is the difference between a forged and a peeled steel round bar?: A forged steel round bar and a peeled steel round bar are both types of steel bars used in various industries for different applications. However, there are distinct differences between the two in terms of their manufacturing processes and physical characteristics. A forged steel round bar is made by heating a solid steel billet to a high temperature and then applying pressure to shape it into the desired form. This process involves the use of machinery, such as hammers or presses, to shape the steel and create the round bar. The forging process imparts strength and durability to the steel, making it suitable for applications that require high strength and resistance to wear and tear. On the other hand, a peeled steel round bar is produced through a different manufacturing process known as peeling or turning. In this process, a solid steel bar is rotated against a cutting tool, which removes the outer layer of the bar, resulting in a smooth and precise surface finish. Peeling removes any surface defects or imperfections present in the original bar, improving its dimensional accuracy and surface quality. In terms of physical characteristics, forged steel round bars typically have a rougher surface texture due to the nature of the forging process. This rough texture can provide enhanced grip or adhesion when used in certain applications. Additionally, forged bars often have a denser and more uniform internal grain structure, which contributes to their superior mechanical properties. Peeled steel round bars, on the other hand, possess a smooth and shiny surface finish as a result of the peeling process. This smooth surface makes peeled bars suitable for applications that require aesthetic appeal or require a low coefficient of friction. However, the peeling process may result in a slight reduction in the overall diameter of the bar. In summary, the main difference between a forged and a peeled steel round bar lies in their manufacturing processes and resulting physical characteristics. Forged bars are created through the application of pressure, resulting in a rougher surface texture and superior mechanical properties. Peeled bars, on the other hand, are produced by removing the outer layer of a steel bar, resulting in a smooth surface finish and improved dimensional accuracy. The choice between these two types of bars ultimately depends on the specific requirements of the application at hand.

Q:Can steel round bars be used in the aerospace manufacturing industry?: The aerospace manufacturing industry can indeed utilize steel round bars. In various aerospace applications like structural components, landing gear, engine components, and fasteners, steel round bars are a common choice. The reason behind this is the commendable strength and durability of steel, which makes it highly suitable for critical aerospace applications. Moreover, steel round bars can be conveniently machined and shaped into intricate forms, offering customization and precise engineering solutions in the aerospace sector. Furthermore, steel's ability to resist corrosion and withstand extreme temperatures enhances its reliability in aerospace manufacturing. Ultimately, due to their strength, durability, machinability, and corrosion resistance, steel round bars emerge as a versatile and extensively employed material in the aerospace industry.

Q:Can steel round bars be used for making interior components?: Yes, steel round bars can be used for making interior components. Steel is a durable and versatile material that can be shaped and formed into various designs and structures. Round bars are particularly suitable for creating interior components such as handrails, staircases, furniture frames, and decorative elements. They provide strength, stability, and an aesthetic appeal to interior spaces. Additionally, steel round bars can be easily welded, bent, or cut to meet specific design requirements, making them an ideal choice for custom-made interior components.

Q:What are the advantages of using low-alloy steel round bars?: One advantage of using low-alloy steel round bars is its increased strength and durability compared to regular carbon steel. This makes it suitable for applications that require high tensile strength and resistance to wear and tear. Additionally, low-alloy steel round bars generally offer better weldability and machinability, allowing for easier fabrication and modification. Overall, low-alloy steel round bars provide a cost-effective solution for various industries, including construction, automotive, and manufacturing.

Q:What is the maximum diameter of a steel round bar?: The maximum diameter of a steel round bar may differ depending on the specific grade and type of steel utilized. Nonetheless, typically, the diameter of a steel round bar ranges from 1 inch to 12 inches. On a customized order basis, larger diameters might be obtainable. To obtain precise information about the maximum diameter of a steel round bar for a particular grade and type of steel, it is crucial to consult the manufacturer or supplier.

Q:What is the difference between a solid round bar and a hollow round bar?: The main difference between a solid round bar and a hollow round bar is their construction. A solid round bar is uniform in shape and made of one solid piece of material, whereas a hollow round bar has a hollow center, which means it has a cylindrical shape with an empty space in the middle. This difference in construction affects their weight, strength, and application. Solid round bars are generally more robust and heavier, making them suitable for applications that require high strength and durability. On the other hand, hollow round bars are lighter in weight and often used in applications where weight reduction is crucial, such as in construction, manufacturing, and engineering industries.

Q:Can steel round bars be used in the manufacturing of lighting fixtures?: Yes, steel round bars can be used in the manufacturing of lighting fixtures. Steel is a versatile material that offers strength, durability, and a sleek appearance, making it suitable for various applications, including lighting fixtures. Steel round bars can be shaped, cut, and welded to create different components of lighting fixtures, such as frames, bases, or decorative elements. Additionally, steel can be finished with various coatings or finishes to enhance its aesthetic appeal and protect it from corrosion.

Q:What are the safety precautions to be taken while handling steel round bars?: When handling steel round bars, it is important to follow certain safety precautions to prevent accidents and injuries. Here are some safety measures to be taken: 1. Personal Protective Equipment (PPE): Always wear appropriate PPE, such as safety goggles, gloves, and steel-toe boots, to protect yourself from potential hazards like flying debris, sharp edges, and crushing injuries. 2. Lifting Techniques: Use proper lifting techniques, such as bending your knees and using your leg muscles instead of your back, to avoid strain or back injuries. Do not attempt to lift heavy steel round bars alone; seek assistance or use lifting equipment like cranes or forklifts. 3. Secure Storage: Store steel round bars in a designated area or rack that is stable and secure. Ensure that they are properly stacked and organized to prevent them from falling or rolling onto someone. 4. Handling Tools: Use appropriate tools, such as tongs or lifting hooks, to handle steel round bars. Avoid using your hands or fingers directly to prevent cuts or pinching injuries. 5. Inspection: Before handling steel round bars, inspect them for any defects, sharp edges, or protrusions that may pose a safety risk. If any issues are found, report them to the appropriate personnel and do not use the bars until they are repaired or replaced. 6. Communication: Maintain clear communication with co-workers when handling steel round bars, especially in situations where multiple people are involved. Use hand signals or verbal cues to coordinate movements and avoid accidental collisions. 7. Proper Storage and Transportation: When storing or transporting steel round bars, ensure they are properly secured and adequately supported to prevent shifting, sliding, or falling during movement. 8. Training: Provide appropriate training to all personnel involved in handling steel round bars. This should include proper lifting techniques, the use of PPE, and awareness of potential hazards and safety procedures. By following these safety precautions, you can minimize the risk of accidents and injuries while handling steel round bars. Always prioritize safety to create a secure working environment for yourself and those around you.

Q:Can steel round bars be bent or shaped?: Certainly! Steel round bars have the capability to undergo bending and shaping. Steel, being a highly malleable material, can be formed into desired shapes through different processes. Techniques such as hot bending, cold bending, or induction bending can be employed to bend the steel. By applying force to the steel bar, it can be deformed and molded into the desired shape. Moreover, machining processes like turning, drilling, milling, or grinding can also be utilized to shape steel round bars. These processes enable the creation of various profiles, including cylindrical, square, or hexagonal shapes, among others. In summary, steel round bars provide great flexibility for bending and shaping, allowing for their versatile use in a wide range of applications.

Q:How do steel round bars compare to plastic or composite bars?: Plastic or composite bars cannot match the advantages of steel round bars. Firstly, steel round bars surpass plastic or composite bars in terms of strength and sturdiness. They excel in enduring heavy loads and providing outstanding structural support. Therefore, they are ideal for construction or engineering projects demanding robustness and durability. Secondly, steel round bars exhibit remarkable resistance to impact and wear. They can withstand severe environmental conditions and are less prone to cracking, chipping, or breaking compared to plastic or composite bars. Consequently, steel round bars suit heavy-duty applications where abrasion resistance is crucial. Moreover, steel round bars boast superior heat resistance in comparison to plastic or composite bars. They can endure high temperatures without distorting or compromising their structural integrity. Hence, steel round bars are suitable for applications involving extreme heat, such as machinery or equipment manufacturing. Furthermore, steel round bars are highly versatile and can be easily machined or modified to meet specific requirements. They allow for effortless customization and adaptability through cutting, drilling, bending, or welding. Conversely, plastic or composite bars may have limitations regarding customization or modification. Nonetheless, it is important to consider that steel round bars also have drawbacks when compared to plastic or composite bars. Steel is heavier, which can pose challenges in handling and transportation. Additionally, depending on the specific grade and quality, steel round bars can be more expensive than their plastic or composite counterparts. In conclusion, steel round bars surpass plastic or composite bars in terms of strength, durability, impact resistance, and heat resistance. Although they may have some drawbacks such as weight and cost, their overall performance and versatility make them the preferred choice for numerous high-performance applications.

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