Carbon Steel C30/C35/C40/C45/C50/C55/C58 Round Bars

Carbon Steel C30/C35/C40/C45/C50/C55/C58 Round Bars System 1

Carbon Steel C30/C35/C40/C45/C50/C55/C58 Round Bars System 2

Carbon Steel C30/C35/C40/C45/C50/C55/C58 Round Bars System 3

Carbon Steel C30/C35/C40/C45/C50/C55/C58 Round Bars System 4

Carbon Steel C30/C35/C40/C45/C50/C55/C58 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)

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 hot rolled and cold drawn steel round bars?: Hot rolled steel round bars are made by heating a billet or ingot of steel to a high temperature and then rolling it into the desired shape. This process results in a rougher surface finish and less precise dimensions compared to cold drawn steel round bars. Cold drawn steel round bars, on the other hand, are made by pulling a hot rolled bar through a die to achieve the desired shape and size. This process produces a smoother surface finish and more accurate dimensions. Overall, the main difference between hot rolled and cold drawn steel round bars lies in the manufacturing process and the resulting surface finish and dimensional accuracy.

Q: Can steel round bars be used for making renewable energy systems?: Yes, steel round bars can be used for making renewable energy systems. Steel is a versatile material that is commonly used in various industries, including renewable energy. It is strong, durable, and resistant to corrosion, making it ideal for constructing frameworks, support structures, and components of renewable energy systems. Steel round bars can be used to manufacture wind turbine towers, solar panel frames, and support structures for hydroelectric power systems. Wind turbine towers require a strong and stable structure to support the weight of the turbine and withstand the forces of wind. Steel round bars provide the necessary strength and stability, ensuring the safety and efficiency of the wind turbine. Similarly, solar panel frames need to be sturdy enough to support the weight of the panels and withstand harsh weather conditions. Steel round bars can be used to construct durable frames that can securely hold the solar panels in place. In the case of hydroelectric power systems, steel round bars can be used to build support structures for various components, such as turbines, generators, and penstocks. These structures need to withstand the immense pressure and force of water flow, and steel's strength and durability make it an excellent choice for this purpose. Overall, steel round bars are a reliable and commonly used material in the construction of renewable energy systems. Their strength, durability, and resistance to corrosion make them suitable for various applications, helping to ensure the long-term viability and sustainability of renewable energy sources.

Q: How to determine the welding seam height of steel plate and steel bar?: How to determine the welding seam height of steel plate and steel bar?:If the steel plate surface and steel end vertical welding, welding angle height depends on the diameter of the steel, general welding angle height is 0.7 times the diameter of reinforcement;

Q: What are the different heat treatment processes for steel round bars?: There are several different heat treatment processes that can be used for steel round bars to enhance their mechanical properties and improve their overall performance. 1. Annealing: This process involves heating the steel round bars to a high temperature and then slowly cooling them, typically in a furnace. Annealing helps to relieve internal stresses, improve ductility, and refine the grain structure of the steel. 2. Normalizing: Normalizing is a heat treatment process that involves heating the steel round bars to a temperature above the critical range, followed by air cooling. This process helps to refine the grain structure, improve machinability, and enhance the mechanical properties of the steel. 3. Quenching and tempering: Quenching is a rapid cooling process that involves immersing the heated steel round bars into a quenching medium, such as oil or water, to rapidly cool them. This process results in the formation of a hard and brittle structure called martensite. To reduce the brittleness and improve the toughness of the steel, tempering is performed by reheating the quenched steel to a specific temperature and then cooling it. This process helps to improve the overall strength, hardness, and toughness of the steel. 4. Stress-relieving: Stress-relieving is a process that involves heating the steel round bars to a specific temperature below the critical range and holding it at that temperature for a certain period of time. This process helps to reduce residual stresses that may have developed during previous manufacturing processes, such as machining or welding. Stress-relieving improves the dimensional stability and reduces the risk of distortion or cracking in the steel round bars. 5. Induction hardening: Induction hardening is a specialized heat treatment process that involves selectively heating the surface of the steel round bars using high-frequency induction currents. This process quickly raises the temperature of the surface to a point where it can be hardened by quenching. Induction hardening is commonly used to increase the wear resistance and hardness of the surface while maintaining the toughness and ductility of the core of the steel round bars. These are some of the most common heat treatment processes used for steel round bars. The selection of the appropriate heat treatment process depends on the desired mechanical properties, intended application, and specific requirements of the steel round bars.

Q: What is the maximum elongation of steel round bars?: The maximum elongation of steel round bars can vary depending on the specific grade and composition of the steel. However, in general, the maximum elongation for steel round bars is typically around 20-30% of its original length. This means that the steel round bar can stretch or elongate by up to 20-30% before reaching its breaking point or ultimate tensile strength. It is important to note that this maximum elongation is influenced by various factors such as the quality of the steel, the manufacturing process, and any heat treatment applied to the bars. Therefore, it is advisable to consult the specific manufacturer's specifications and consider the intended application of the steel round bars to determine the maximum elongation for a particular case.

Q: What is the difference between a centerless ground and a polished steel round bar?: A centerless ground steel round bar is a type of steel bar that has been ground to achieve precise dimensions and a smooth surface finish. The grinding process involves removing material from the outer diameter of the bar, resulting in a consistent diameter and improved dimensional accuracy. On the other hand, a polished steel round bar is a steel bar that has been subjected to a polishing process to enhance its appearance and provide a reflective, shiny surface. While both processes improve the surface finish, centerless grinding focuses more on dimensional accuracy and consistency, while polishing emphasizes aesthetics and visual appeal.

Q: What are the factors to consider when selecting a steel round bar?: There are several factors to take into account when choosing a steel round bar. Firstly, it is crucial to evaluate the grade of steel. Each grade has different properties and strengths, so it is important to consider the specific application and requirements. For instance, if high corrosion resistance is needed, stainless steel grades such as 304 or 316 may be appropriate, while carbon steel grades like A36 or 1018 may be more suitable for structural purposes. Secondly, the dimensions and size of the round bar should be considered. This includes the diameter, length, and tolerance requirements. The size should be chosen based on the specific application, load-bearing capacity, and available installation space. Thirdly, the condition and surface finish of the round bar should be assessed. This includes factors like surface roughness, straightness, and any surface defects. The surface finish should be selected based on the desired aesthetics, functional requirements, and manufacturing process. Another important aspect is the availability and cost of the steel round bar. It is crucial to consider the availability of the desired grade and size from suppliers, as well as the associated cost. Comparing prices from different suppliers is advisable to ensure the best value for money. Furthermore, it is necessary to evaluate the required mechanical properties of the steel round bar. This includes factors like tensile strength, yield strength, hardness, and ductility. The mechanical properties should align with the intended application and load-bearing requirements. Lastly, any additional requirements or certifications should be considered. This could include compliance with specific industry standards (e.g., ASTM, ISO), certifications (e.g., RoHS, REACH), or specific testing requirements (e.g., ultrasonic testing, impact testing). In conclusion, selecting a steel round bar involves considering the grade, dimensions, surface finish, availability, cost, mechanical properties, and any additional requirements. Taking these factors into account will ensure that the chosen steel round bar is suitable for the intended application and meets all necessary specifications.

Q: What are the different types of steel round bars used in the agricultural sector?: In the agricultural sector, different types of steel round bars are commonly used, including mild steel, carbon steel, and stainless steel. These bars are used for various applications such as constructing farm machinery, fencing, and handling equipment. Mild steel round bars are cost-effective and offer good strength, while carbon steel round bars provide enhanced durability and resistance to wear and tear. Stainless steel round bars are favored for their corrosion resistance properties, making them suitable for agricultural applications exposed to moisture or chemicals.

Q: What are the advantages of using magnesium-alloy steel round bars?: Using magnesium-alloy steel round bars offers several benefits: 1. They are lightweight, making them ideal for industries that require weight reduction, such as aerospace and automotive. 2. Despite being lightweight, they have a high strength-to-weight ratio, ensuring structural integrity under high loads. 3. They have excellent corrosion resistance, making them suitable for outdoor and marine applications. 4. They are known for their superior machinability, allowing for precise and complex component manufacturing. 5. They effectively dissipate heat, making them ideal for applications that require heat management. 6. They contribute to a more sustainable and environmentally friendly manufacturing process due to magnesium's recyclability. 7. While they may have a higher initial cost, their lightweight nature leads to cost savings in transportation and installation. Additionally, their corrosion resistance and durability reduce long-term maintenance and replacement costs. In conclusion, magnesium-alloy steel round bars offer advantages such as lightweight, high strength-to-weight ratio, corrosion resistance, machinability, heat dissipation, eco-friendliness, and cost-effectiveness. They are highly desirable for industries that prioritize weight reduction, performance, and durability.

Q: What are the corrosion resistance properties of steel round bars?: Steel round bars have excellent corrosion resistance properties due to the presence of alloying elements such as chromium, nickel, and molybdenum. These elements form a protective oxide layer on the surface of the steel, preventing the metal from coming into contact with corrosive substances. Additionally, stainless steel round bars are highly resistant to rust and corrosion caused by exposure to moisture, chemicals, and atmospheric conditions, making them suitable for various applications in industries such as construction, marine, and manufacturing.

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