C40 Carbon 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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C	Si	Mn	S max	P max	B
0.37-0.44	0.17-0.37	0.35-0.90	0.035	0.035	0.0008-0.003

Yield strength(MPa)	Tensile strength(MPa)	Elongation(%)	Reduction of area(%)	AKV(J)	Hardness(HB)
335	570	219	45	47	217

Sizes detalis	diameter	10-310mm
Sizes detalis	length	3-12m(canbe customerized)
Sizes tolerance	length	+/-100mm(max)
Sizes tolerance	diameter	+/-2mm(max)
Sizes tolerance	Straightness	3mm/m(max)

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: How do steel round bars compare to other materials like aluminum or stainless steel?: Steel round bars have several advantages over other materials like aluminum or stainless steel. Firstly, steel round bars are known for their exceptional strength and durability. They have a high tensile strength, making them capable of withstanding heavy loads and extreme conditions. This makes them ideal for applications where strength and resilience are crucial, such as construction, manufacturing, and engineering. Compared to aluminum, steel round bars offer superior strength and hardness. While aluminum is lightweight, it is not as strong as steel, which can be a limiting factor in certain applications. Steel round bars also have a higher resistance to impact and abrasion, making them more suitable for heavy-duty applications that require resistance to wear and tear. In terms of comparing steel round bars to stainless steel, it's important to note that stainless steel is an alloy that contains steel as its main component. Stainless steel is known for its corrosion resistance, making it an excellent choice for applications where exposure to moisture or harsh environments is a concern. However, stainless steel does not possess the same level of strength as steel round bars. Steel round bars are capable of carrying heavier loads and providing better structural integrity. Another aspect to consider is the cost-effectiveness of steel round bars compared to aluminum or stainless steel. Steel is generally more affordable than stainless steel and aluminum, making it a popular choice for a wide range of applications. Additionally, steel round bars are readily available in various sizes and grades, offering versatility and ease of use. Overall, steel round bars excel in terms of strength, durability, and cost-effectiveness when compared to other materials like aluminum or stainless steel. However, the choice of material ultimately depends on the specific requirements of the application and the desired properties needed for the project.

Q: What's the difference between pure iron round steel and electromagnetic pure iron bar?: One thing, one thing, the same thing is round. However, in the general industry, about 30 of the habit is called bar,

Q: Can steel round bars be used in the manufacturing of architectural features?: Steel round bars are a valuable resource in the production of architectural features. With their versatility and strength, they are well-suited for a variety of applications within the construction industry, particularly in the creation of architectural features. These bars can be utilized to construct both structural and decorative elements, such as columns, beams, supports, stair railings, balustrades, and ornamental sculptures. Due to their durability, stability, and resistance to corrosion, steel round bars are an excellent choice for architectural features that must endure the test of time and harsh environmental conditions. Moreover, these bars can be easily manipulated and shaped into various designs, enabling architects to exercise their creativity and personalize their architectural projects.

Q: How are steel round bars used in the construction of offshore structures?: Due to their exceptional mechanical properties, steel round bars are widely employed in offshore construction for their robustness and resilience. These bars, typically crafted from carbon steel or alloy steel, are commonly utilized in the production of oil rigs, offshore platforms, pipelines, and subsea structures. The primary function of steel round bars in offshore construction is to furnish structural support and reinforcement. Particularly, they are instrumental in the creation of piles, which are lengthy cylindrical structures driven into the seabed to establish a stable foundation for offshore facilities. Steel round bars are preferred for this purpose due to their remarkable ability to endure the harsh marine environment and heavy loads. Additionally, offshore platforms, which serve as elevated workspaces for oil and gas exploration and production activities, heavily rely on steel round bars. These bars are employed to construct the framework of the platform, constituting vital structural elements such as columns, beams, and trusses. By welding or bolting them together, a robust and rigid structure capable of withstanding extreme weather conditions and substantial loads is created. Moreover, steel round bars are integral to the construction of pipelines, which enable the transportation of oil and gas from offshore wells to onshore facilities. These bars are utilized to fabricate pipeline supports, guaranteeing the stability and secure fastening of the pipeline to the seabed. To conclude, the significance of steel round bars in offshore construction cannot be overstated. Their exceptional strength, durability, and ability to withstand the demanding marine environment make them the ideal choice for providing structural support and reinforcement in offshore construction ventures.

Q: What are the different types of steel round bar alloys for improved machinability?: There are several types of steel round bar alloys that are specifically designed to improve machinability. These alloys are chosen for their ability to be easily shaped, cut, and drilled, which is crucial in various machining applications. Some of the commonly used steel round bar alloys for improved machinability include: 1. 12L14 Steel: This alloy contains added lead, which enhances its machinability. The presence of lead lubricates the cutting tool, reduces friction, and improves chip formation during the machining process. 2. 1215 Steel: Similar to 12L14, 1215 steel also contains added lead, which provides excellent machinability. This alloy is known for its high cutting speeds, smooth surface finish, and improved chip control. 3. 4140 Steel: Although not specifically designed for machinability, 4140 steel is known for its excellent overall machining properties. With proper heat treatment, this alloy offers good strength, toughness, and wear resistance while still maintaining a reasonable level of machinability. 4. 1018 Steel: This low carbon steel alloy is widely used for its excellent machinability. It is easy to cut, drill, and shape, making it suitable for a variety of machining operations. However, it may have lower strength compared to some other alloys. 5. 8620 Steel: This alloy is specifically designed for case hardening, but it also offers good machinability. 8620 steel can be easily machined, providing high surface finish and dimensional accuracy. 6. 416 Stainless Steel: This stainless steel alloy provides good machinability due to its sulfur content. It is used in applications where corrosion resistance is required along with improved machinability. These are just a few examples of steel round bar alloys that are chosen for their enhanced machinability. The selection of the appropriate alloy depends on the specific machining requirements and the desired properties in the final product.

Q: Can steel round bars be used for making universal joints?: Yes, steel round bars can be used for making universal joints. Steel round bars are commonly used in the manufacturing of universal joints due to their strength, durability, and ability to handle high torque and rotational forces.

Q: What are the different methods of cutting steel round bars?: There are several methods for cutting steel round bars, each with its own advantages and limitations. Some of the most commonly used methods include: 1. Abrasive cutting: This method involves using a rotating abrasive wheel to grind through the steel round bar. It is a fast and efficient method, but it can produce a rough cut surface and generate a significant amount of heat. 2. Bandsaw cutting: Bandsaw machines are commonly used to cut steel round bars. They consist of a continuous band of toothed metal that rotates around two wheels, slicing through the material. Bandsaws provide a smooth and precise cut, but they are slower than some other methods. 3. Cold saw cutting: Cold saws are specifically designed for cutting metal, including steel round bars. They use a circular saw blade with teeth that have been specially designed to withstand the hardness of steel. Cold saws produce clean and accurate cuts, but they are generally slower than abrasive or bandsaw cutting. 4. Plasma cutting: Plasma cutting is a high-energy cutting method that uses a focused jet of ionized gas to melt and remove the metal. It is commonly used for thicker steel round bars and can produce a precise and clean cut. However, it requires specialized equipment and can be more expensive than other methods. 5. Laser cutting: Laser cutting uses a high-powered laser beam to melt and vaporize the metal, resulting in a precise and clean cut. It is a versatile method that can be used for various thicknesses of steel round bars. However, it requires expensive equipment and may not be suitable for all applications. Ultimately, the choice of cutting method depends on factors such as the thickness and hardness of the steel round bar, the desired cut quality, the available equipment, and the specific requirements of the project.

Q: What are the different types of steel round bar finishes for decorative purposes?: There are several different types of steel round bar finishes that can be used for decorative purposes. Some common options include polished, brushed, hammered, and antique finishes. Each of these finishes provides a unique aesthetic appeal and can be chosen based on the desired look and style for the decorative application.

Q: How do you straighten steel round bars?: To straighten steel round bars, you can use a variety of methods depending on the level of precision required and the size of the bars. Here are a few common techniques: 1. Manual Straightening: This method is suitable for smaller diameter round bars. Place the bar on a flat surface and apply pressure to the bent section using a hydraulic or manual press. Gradually increase the force until the bar is straightened. This technique is relatively simple but may not yield perfect results. 2. Heat Straightening: Heat straightening is effective for larger diameter round bars or bars with severe bends. Heat the bent section using an oxy-acetylene torch until it becomes red hot. Once heated, apply pressure in the opposite direction of the bend using hydraulic or manual tools. The heat softens the steel, allowing it to be manipulated easier. Be cautious not to overheat the steel, as it may weaken its structural integrity. 3. Roller Straightening: This method is commonly used in industrial settings and is suitable for larger diameter round bars. The bar is passed through a series of rollers that apply pressure to the bent section, gradually straightening it. This technique provides precise and uniform results but requires specialized equipment. 4. Hydraulic Press Straightening: For precision straightening, a hydraulic press can be used. Place the bar between two parallel plates and apply pressure using the hydraulic press. Gradually increase the force until the bar is straightened. This method is suitable for bars with minor bends and allows for precise control over the straightening process. It is essential to note that while these methods can straighten steel round bars, the effectiveness may vary depending on the severity of the bend, the quality of the steel, and the equipment used. It is advisable to consult with a professional or follow industry-specific guidelines to ensure safe and accurate straightening of steel round bars.

Q: Can steel round bars be used in automotive applications?: Yes, steel round bars can be commonly used in automotive applications due to their strength, durability, and versatility. They are often used in various components such as axles, crankshafts, suspension parts, and steering columns, among others, to provide structural support and ensure the safe and efficient functioning of vehicles.

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