Low Carbon Steel C10/C15/C22/C25 Round Bars

Low Carbon Steel C10/C15/C22/C25 Round Bars System 1

Low Carbon Steel C10/C15/C22/C25 Round Bars System 2

Low Carbon Steel C10/C15/C22/C25 Round Bars System 3

Low Carbon Steel C10/C15/C22/C25 Round Bars System 4

Low Carbon Steel C10/C15/C22/C25 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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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

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FAQ

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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

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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.

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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 cast iron bars?: Considered to be stronger and more durable than cast iron bars are steel round bars. Steel possesses a higher tensile strength and can endure greater loads and stress without distorting or fracturing. Moreover, steel exhibits superior resistance to corrosion and possesses a higher melting point in comparison to cast iron. An additional benefit of steel round bars lies in their versatility. Steel can be easily machined, welded, and shaped into various forms, making it suitable for a wide array of applications. Conversely, cast iron is brittle and challenging to manipulate. It possesses limited malleability and is prone to cracking or chipping under stress. Nevertheless, cast iron bars possess their own distinct properties that render them appropriate for specific applications. Renowned for its exceptional heat retention and distribution, cast iron proves ideal for applications such as cookware and engine blocks. It also boasts commendable vibration damping properties, which can prove advantageous in certain industrial applications. In conclusion, while steel round bars are generally regarded as superior in terms of strength, durability, and versatility, cast iron bars possess unique advantages in select applications. Ultimately, the choice between the two will depend on the specific requirements and conditions of the intended use.

Q: Can steel round bars be used for construction purposes?: Yes, steel round bars can be used for construction purposes. They are commonly used for structural applications such as building frames, bridges, and various types of infrastructure due to their strength, durability, and versatility. Steel round bars provide a reliable and cost-effective solution for construction projects.

Q: How do you measure the hardness of a steel round bar?: There are various methods to measure the hardness of a steel round bar, with the Rockwell hardness test being the most commonly used. This test involves applying a specific load to an indenter and measuring the depth of the resulting indentation on the material's surface. To measure the hardness of a steel round bar using the Rockwell hardness test, follow these steps: 1. Choose the appropriate Rockwell scale for the steel being tested. The commonly used scales for steel are HRC (Rockwell C) and HRB (Rockwell B). 2. Clean the surface of the steel round bar to eliminate any dirt, oil, or contaminants that could affect the test's accuracy. 3. Place the steel round bar on a flat and stable surface, ensuring proper support to prevent any movement during testing. 4. Select the suitable indenter for the chosen Rockwell scale. For HRC, a diamond cone indenter is typically used, while for HRB, a hardened steel ball is used. 5. Apply a preliminary minor load to the indenter, usually 10 kgf for HRC and 3 kgf for HRB. This ensures proper contact between the indenter and the material's surface. 6. Apply the major load, specific to the chosen Rockwell scale. For HRC, it is typically 150 kgf, while for HRB, it is usually 100 kgf. 7. Allow the major load to dwell for a specific period, typically 15 seconds, to ensure proper indentation. 8. Release the major load while maintaining the minor load. This allows the indenter to partially recover, reducing the depth of the indentation. 9. Measure the depth of the remaining indentation using a microscope or a specialized Rockwell hardness testing machine. The measured value corresponds to the hardness value on the chosen Rockwell scale. It's worth noting that the Rockwell hardness test is just one of several methods available to measure the hardness of a steel round bar. Depending on the specific requirements of the application, other methods like the Brinell hardness test or the Vickers hardness test may also be utilized.

Q: What are the advantages of using alloy steel round bars?: There are several advantages of using alloy steel round bars. Firstly, alloy steel round bars offer superior strength and durability compared to regular steel bars. This makes them ideal for applications where high strength and toughness are required, such as in construction, automotive, and aerospace industries. The alloying elements in these bars enhance their mechanical properties, making them more resistant to wear, impact, and corrosion. Additionally, alloy steel round bars have excellent heat resistance. They can withstand high temperatures without losing their strength, making them suitable for use in high-temperature environments like furnaces, boilers, and heat exchangers. This property allows for extended service life and reduces the need for frequent replacements. Another advantage of using alloy steel round bars is their versatility. These bars can be easily machined, forged, or welded, allowing for flexibility in design and manufacturing processes. They can be customized to meet specific requirements, making them suitable for various applications. Furthermore, alloy steel round bars have good dimensional stability. They maintain their shape and size even under extreme conditions, ensuring precise and accurate performance. This property is particularly important in applications where tight tolerances are required, such as in precision engineering and manufacturing industries. Lastly, alloy steel round bars are cost-effective in the long run. Although they may have a higher initial cost compared to regular steel bars, their enhanced properties and extended service life result in reduced maintenance and replacement costs. This makes them a more economical choice in the long term. In conclusion, the advantages of using alloy steel round bars include superior strength and durability, excellent heat resistance, versatility in machining and fabrication, good dimensional stability, and long-term cost-effectiveness. These benefits make them a preferred choice in various industries where high-performance materials are required.

Q: What is the difference between a hot-rolled and a cold-drawn steel round bar?: The main difference between a hot-rolled and a cold-drawn steel round bar lies in the manufacturing process. Hot-rolled steel round bars are formed by heating and rolling the steel at high temperatures, resulting in a rougher surface finish and less precise dimensions. On the other hand, cold-drawn steel round bars are formed by pulling the steel through a die at room temperature, resulting in a smoother surface finish and more precise dimensions. Cold-drawn steel round bars also tend to have improved mechanical properties and a higher strength-to-weight ratio compared to hot-rolled steel round bars.

Q: What is the difference between a solid round bar and a hollow round bar?: A cylindrical shape, known as a solid round bar, consists of a single material, typically metal or plastic. It maintains a consistent diameter throughout its length, without any empty space inside. In contrast, a hollow round bar also has a cylindrical shape but contains a hollow space within its center. This hollow space creates a tube-like structure within the bar. The outer diameter remains constant, but the inner diameter varies depending on the design and purpose of the hollow round bar. The primary distinction between a solid round bar and a hollow round bar lies in their structural characteristics and potential uses. The solid round bar offers strength and rigidity due to its solid core, making it suitable for applications requiring robust support or load-bearing capabilities. It finds common usage in construction, manufacturing, and engineering projects where strength and durability are vital. Conversely, the hollow round bar combines strength with a lightweight design. The presence of the hollow space reduces the overall weight while maintaining structural integrity. This makes hollow round bars ideal for applications prioritizing weight reduction, such as in the aerospace, automotive, and marine industries. Furthermore, the hollow space can serve various purposes, such as facilitating the passage of fluids, wires, or other components through the bar. In conclusion, while both solid and hollow round bars possess a cylindrical shape, the presence or absence of a hollow space distinguishes them. Solid round bars offer strength and rigidity, while hollow round bars strike a balance between strength and reduced weight, with the potential for additional functionality. The choice between the two depends on the specific requirements and intended application of the bar.

Q: Can steel round bars be used in the manufacturing of office furniture?: Yes, steel round bars can be used in the manufacturing of office furniture. Steel is a versatile and durable material that can be shaped into various forms, including round bars. These round bars can be used as structural components in office furniture, such as table legs, chair frames, or support beams. Steel round bars provide strength and stability to the furniture, making it suitable for heavy use in office environments. Additionally, steel can be finished in different ways, such as powder coating or chrome plating, to enhance its appearance and match the aesthetic of the office space. Overall, using steel round bars in the manufacturing of office furniture offers durability, stability, and a modern look.

Q: Can steel round bars be used in the production of valves?: Yes, steel round bars can be used in the production of valves. Steel round bars are commonly used as raw material in valve manufacturing due to their high strength, durability, and resistance to corrosion. The bars can be machined, forged, or cast to create various valve components such as stems, bodies, and bonnets. Additionally, steel round bars offer excellent mechanical properties, making them suitable for handling high-pressure and high-temperature applications commonly encountered in valve systems.

Q: What are the standard sizes of steel round bars?: The standard sizes of steel round bars vary depending on the country and the specific industry standards. In general, steel round bars are available in a wide range of diameters, typically ranging from 6mm (0.24 inches) to 400mm (15.75 inches) or even larger. Commonly used sizes for commercial applications include 10mm (0.39 inches), 12mm (0.47 inches), 16mm (0.63 inches), 20mm (0.79 inches), 25mm (0.98 inches), and 32mm (1.26 inches). However, it is important to note that these sizes may differ in different regions and industries, and specialized applications may require unique dimensions. It is always recommended to consult the relevant industry standards or consult with suppliers to determine the specific standard sizes for steel round bars in a particular context.

Q: Can steel round bars be used for drive shaft applications?: Yes, steel round bars can be used for drive shaft applications. Drive shafts are responsible for transmitting torque and rotational motion from the engine to the wheels or other components in various mechanical systems such as automobiles, industrial machinery, and even boats. Steel round bars possess excellent mechanical properties, including high strength, durability, and toughness, which are crucial for withstanding the stresses and loads imposed during operation. They also exhibit good fatigue resistance, allowing them to endure repeated loading cycles without failure. Furthermore, steel round bars can be accurately machined to meet the required dimensions and tolerances for drive shaft applications. They can be heat-treated to enhance their strength and hardness or surface treated to improve corrosion resistance if necessary. Overall, steel round bars are a popular choice for drive shaft applications due to their combination of strength, durability, and machinability, making them well-suited for transmitting power efficiently and reliably in various mechanical systems.

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