1040 Carbon Structural Steel Round Bars System 1

1040 Carbon Structural Steel Round Bars System 2

1040 Carbon Structural Steel Round Bars System 3

1040 Carbon Structural Steel Round Bars System 4

1040 Carbon Structural Steel Round Bars

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Sizes detalis	diameter	16-320mm
length	3-12m(canbe customerized)
Sizes tolerance	length	+/-100mm
Straightness	3mm/m

GB	ASTM	JIS	DIN	BS	NF
40#	1040	S40C	C40	IC40080M40	C40

C	Si	Mn	Cr(≤)	Ni(≤)	Cu(≤)
0.37-0.44	0.17-0.37	0.5-0.8	0.25	0.3	0.25

Tensile Strength(Mpa)	Yield Strength(Mpa)	Elongation	Shrinkage	Akv(J)
570	335	19	45	47

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)

Carbon Steel	Mold bottom, Plastic mold, Construction machinery parts Automobile parts, Security grills, Screens, Construction
Bearing Steel	Aerospace, Navigation, Nuclear energy, Chemical industry Electronic information, Petrochemical, Instrument and meter Transportation
Cr-Mo Steel	Mechanism & Fasteners gear, Stressed components for vehicles Engines and machines, Parts of larger cross-section
Gear Steel	All kinds of gears, Statically and dynamically stressed component for vehicles Engines and machine, Larger cross-section parts, Crankshafts

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 seamless and a precision ground steel round bar?: A seamless steel round bar is made from a solid cylindrical steel billet that is heated and pierced to create a hollow tube-like structure. This process ensures a consistent outer diameter throughout the length of the bar, making it suitable for applications that require a smooth surface finish and high dimensional accuracy. Seamless round bars are commonly used in industries such as oil and gas, automotive, and aerospace. On the other hand, a precision ground steel round bar is manufactured by taking a hot-rolled or cold-drawn steel bar and subjecting it to precision grinding processes. This involves removing any surface imperfections, achieving tight dimensional tolerances, and providing a smooth and polished finish. Precision ground round bars are typically used in applications that require tight tolerances, excellent surface finish, and dimensional consistency, such as in the manufacturing of machinery parts, tools, and components. In summary, the main difference between a seamless and a precision ground steel round bar lies in the production process and the resulting properties. Seamless round bars are made from a hollow tube-like structure, ensuring a consistent outer diameter, while precision ground round bars are produced by grinding a solid steel bar to achieve tight tolerances and superior surface finish. Both types of round bars have their own advantages and are used in various industries depending on the specific application requirements.

Q:What are the common applications of steel round bars?: Steel round bars have numerous common applications across various industries. One common application is in construction, where steel round bars are used for structural support in buildings, bridges, and other infrastructure projects. They are also commonly used in the automotive industry for manufacturing of components such as axles, crankshafts, and suspension systems. Additionally, steel round bars find applications in the manufacturing of machinery, tools, and equipment due to their strength and durability. They are also utilized in the production of furniture, appliances, and various hardware products.

Q:Can steel round bars be used for making steering linkages?: Yes, steel round bars can be used for making steering linkages. Steel round bars are commonly used in various mechanical applications due to their strength and durability. They offer the necessary stability and rigidity required for steering linkages, making them a suitable choice for this purpose.

Q:How are steel round bars used in the manufacturing of conveyor systems?: Due to their durability and strength, steel round bars are commonly utilized in the manufacturing of conveyor systems. These bars serve as integral components for conveyor belts, rollers, and pulleys. In the realm of conveyor systems, it is customary to employ steel round bars in the construction of the framework or support structure. These bars form the main body of the conveyor, ensuring stability and strength to withstand the weight and movement of transported materials. To illustrate, steel round bars are frequently utilized in the creation of the support structure for conveyor belts. These bars are typically bent or welded into circular shapes, forming the rollers or idlers that provide support for the conveyor belt. The bars are evenly spaced along the conveyor's length, establishing a stable platform for the belt's movement. Moreover, steel round bars are also employed in the fabrication of the pulleys that drive the conveyor belt. These pulleys are usually fashioned from a solid steel round bar, which is machined to the desired size and shape. Once mounted on the conveyor system, the pulleys are connected to a motor or other power source, enabling them to rotate and move the conveyor belt. In essence, steel round bars assume a vital role in the manufacturing of conveyor systems by furnishing the necessary strength and stability for efficient material handling. Their durability and resistance to wear and tear make them an ideal choice for the demanding conditions found in conveyor applications.

Q:What are the advantages of using boron-alloy steel round bars?: There are several advantages of using boron-alloy steel round bars in various applications. Firstly, boron-alloy steel has significantly higher strength compared to traditional carbon steel. This increased strength allows for the construction of more lightweight and durable structures, reducing material costs and improving overall efficiency. Additionally, boron-alloy steel round bars exhibit excellent hardenability, which means they can be heat-treated to achieve desired properties such as increased hardness and wear resistance. This makes them ideal for use in demanding applications where high strength and durability are required, such as in the automotive and construction industries. Another advantage of boron-alloy steel round bars is their enhanced weldability. They can be easily welded without sacrificing their mechanical properties, allowing for seamless integration into various fabrication processes. This not only saves time and effort during assembly but also ensures the structural integrity of the final product. Furthermore, boron-alloy steel round bars offer excellent resistance to abrasion and corrosion, making them suitable for use in harsh environments or applications where exposure to chemicals or moisture is common. This extends the lifespan of the material and reduces the need for frequent repairs or replacements, resulting in cost savings and improved productivity. Lastly, boron-alloy steel round bars are readily available and cost-effective compared to other high-strength steel alternatives. Their wide availability makes them a viable option for a range of applications, from manufacturing machinery to constructing infrastructure. In summary, the advantages of using boron-alloy steel round bars include higher strength and durability, improved hardenability, enhanced weldability, resistance to abrasion and corrosion, and cost-effectiveness. These benefits make them an excellent choice for various industries where lightweight, strong, and long-lasting materials are required.

Q:Can steel round bars be used for making cooling system components?: Yes, steel round bars can be used for making cooling system components. Steel is a versatile and durable material that can withstand high temperatures and pressures, making it suitable for cooling system applications. Steel round bars can be machined to specific dimensions and shapes required for different cooling system components such as pipes, fittings, valves, and heat exchangers. Additionally, steel has excellent thermal conductivity, allowing for efficient heat transfer in cooling systems. However, it is important to consider the specific requirements of the cooling system and consult with engineers or professionals in order to select the appropriate grade of steel and ensure compatibility with other system components.

Q:What are the different international standards for steel round bars?: There are several different international standards for steel round bars, including ASTM A36, ASTM A615, ASTM A276, EN 10060, DIN 1013, and JIS G4105. Each standard specifies different requirements for the chemical composition, mechanical properties, dimensions, and tolerances of steel round bars, ensuring their quality and compatibility with specific applications.

Q:What are the common sizes and dimensions of steel round bars?: Steel round bars come in a variety of sizes and dimensions to cater to different applications and requirements. The most common sizes and dimensions of steel round bars include diameters ranging from 1/4 inch to 24 inches. These diameters correspond to the nominal size of the round bar, which represents the approximate measurement of the bar's cross-sectional diameter. In terms of dimensions, steel round bars are typically available in standard lengths of 20 feet or 6 meters. However, custom lengths can be produced upon request. The length of the round bar is crucial as it determines the amount of material available for cutting, shaping, and fabrication. Additionally, the weight of steel round bars can vary depending on their size. Steel is typically measured by its weight per unit length, commonly expressed in pounds per foot or kilograms per meter. The weight of a steel round bar is influenced by the diameter, length, and specific type of steel used. It is worth noting that the sizes and dimensions mentioned above are standard in the industry, but there may be variations depending on the specific manufacturer or supplier. Therefore, it is always advisable to consult the manufacturer's catalog or contact them directly to obtain accurate and up-to-date information on the sizes and dimensions of steel round bars they offer.

Q:What is the difference between a centerless ground and a cold finished steel round bar?: A centerless ground steel round bar and a cold finished steel round bar are both types of steel bars that have undergone different manufacturing processes, resulting in distinct characteristics and properties. A centerless ground steel round bar is produced by feeding a hot rolled or cold drawn steel bar through a grinding machine. This process removes any surface imperfections or irregularities, resulting in a smooth and uniform surface finish. The centerless grinding process also ensures tight dimensional tolerances, making the bar suitable for applications that require precise measurements. Additionally, centerless ground bars have improved straightness and roundness, which enhances their overall quality and suitability for various machining operations. On the other hand, a cold finished steel round bar is produced by cold drawing or cold rolling a hot rolled steel bar. This process involves reducing the diameter of the bar while maintaining its length, resulting in a more precise and consistent size. Cold finishing also improves the surface finish of the bar, making it smoother and more uniform. Cold finished bars have tighter dimensional tolerances and improved mechanical properties, including higher strength and hardness compared to hot rolled bars. In summary, the main difference between a centerless ground and a cold finished steel round bar lies in the manufacturing processes used and their resulting characteristics. Centerless ground bars have a smooth surface finish, tight dimensional tolerances, improved straightness, and roundness, making them suitable for precise machining applications. Cold finished bars, on the other hand, have a more precise size, improved surface finish, tighter dimensional tolerances, and enhanced mechanical properties, making them suitable for various applications requiring higher strength and hardness.

Q:How do you calculate the fatigue strength of a steel round bar?: To calculate the fatigue strength of a steel round bar, you typically conduct a fatigue test, also known as a fatigue life assessment. This involves subjecting the round bar to repeated loading cycles, with varying stress levels, until it fails. The number of cycles the bar can withstand before failure is the fatigue strength. This test helps determine the endurance limit or fatigue limit of the steel round bar, which represents the maximum stress level that the bar can endure indefinitely without failure.

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