45# Carbon Steel Material

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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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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.42-0.50 %	Tensile strength(MPA)	≥600
Si	0.17-0.37 %	Yield strength (MPA)	≥355
Mn	0.50-0.80 %	Elongation (δ5/%)	≥16
Cr	≤0.25 %	Reduction in Area (ψ/%)	≥40
Ni	≤0.25 %	Impact (J)	≥ 39
P	≤0.035 %	Hardness	≤197HB
S	≤0.035 %
Cu	≤0.25 %

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 are the different types of steel round bars used in the automotive chassis components?: There is a wide range of steel round bars commonly employed in automotive chassis components. These bars are selected based on their unique properties and performance criteria for different parts of the chassis. 1. Mild Steel Round Bars: Automotive chassis components often utilize mild steel round bars due to their well-balanced combination of strength, durability, and cost-effectiveness. These bars find application in various chassis parts such as brackets, supports, and reinforcements. 2. High-Strength Low-Alloy (HSLA) Steel Round Bars: HSLA steel round bars are crafted by combining low carbon content with small quantities of alloying elements like manganese, phosphorus, and chromium. This steel variant offers superior strength and enhanced formability compared to mild steel. Chassis components that demand critical performance, such as control arms, suspension components, and steering linkages, frequently incorporate HSLA steel round bars. 3. Boron Steel Round Bars: Boron steel round bars are renowned for their exceptional strength and resistance to deformation. These bars are alloyed with boron, which imparts high hardenability and toughness to the steel. Safety-critical chassis components like reinforced door beams and crash structures primarily employ boron steel round bars. 4. Stainless Steel Round Bars: Stainless steel round bars exhibit corrosion resistance alongside excellent strength and durability. While they are not as commonly employed in automotive chassis components, stainless steel round bars may be utilized in specialized parts that necessitate resistance to rust and corrosion, such as exhaust system components or parts exposed to harsh environmental conditions. 5. Alloy Steel Round Bars: Alloy steel round bars are produced by incorporating various alloying elements like nickel, chromium, and molybdenum to enhance specific properties such as strength, hardness, and wear resistance. These bars frequently find application in high-performance chassis components like drive shafts, axles, and gears. To summarize, the types of steel round bars utilized in automotive chassis components encompass mild steel, high-strength low-alloy steel, boron steel, stainless steel, and alloy steel. The selection of the appropriate type depends on the specific requirements of each component, including strength, durability, formability, and corrosion resistance.

Q: What are the different types of steel round bars used in the automotive engine components?: Automotive engine components rely on various types of steel round bars, each possessing unique properties and applications. 1. Carbon Steel Round Bars: The most prevalent variant, carbon steel round bars, display exceptional strength and durability. Their versatility allows them to be employed in manifold applications such as crankshafts, connecting rods, and camshafts. They excel in withstanding elevated stress levels and extreme temperatures. 2. Alloy Steel Round Bars: By introducing alloying elements like chromium, nickel, and molybdenum to carbon steel, alloy steel round bars enhance their strength, toughness, and resistance to wear. They find common usage in automotive engine components like gears, shafts, and bearings, which necessitate high strength and the ability to resist wear and fatigue. 3. Stainless Steel Round Bars: Automotive engine components that encounter corrosive fluids or environments benefit from the corrosion-resistant properties of stainless steel round bars. Valves, pistons, and exhaust systems are among the applications where stainless steel round bars are frequently employed. 4. Tool Steel Round Bars: Tool steel round bars are renowned for their remarkable hardness, abrasion resistance, and superior toughness. They are extensively utilized in automotive engine components involved in cutting or shaping processes, such as cutting tools, dies, and punches. 5. High-Speed Steel Round Bars: High-speed steel round bars are engineered to endure high temperatures while maintaining hardness and cutting efficiency at elevated speeds. Drills, milling cutters, and reamers in automotive engine components often benefit from high-speed steel round bars. It is crucial to highlight that the choice of steel round bar for automotive engine components depends on the specific application, performance requirements, and cost considerations. Automotive manufacturers meticulously select the appropriate steel grade to guarantee optimal performance and durability of engine components.

Q: What are the different types of steel round bars used in the manufacturing of valves and fittings?: Valves and fittings in manufacturing commonly utilize various types of steel round bars. These options include: 1. Carbon Steel Round Bars: Frequently employed in valve and fitting manufacturing, carbon steel round bars possess notable attributes such as strength, durability, and the ability to withstand high temperatures and pressures. 2. Stainless Steel Round Bars: Ideal for valves and fittings that come into contact with liquids or gases, stainless steel round bars exhibit high resistance to corrosion. They are also known for their exceptional strength and mechanical properties. 3. Alloy Steel Round Bars: Alloy steel round bars are created by incorporating alloying elements like chromium, manganese, and nickel into carbon steel. This enhances their strength, hardness, and resistance to wear and tear, making them suitable for demanding valve and fitting applications. 4. Duplex Steel Round Bars: Combining ferrite and austenite phases, duplex steel round bars are a specific type of stainless steel. This unique blend grants them excellent strength, corrosion resistance, and resistance to stress corrosion cracking, making them well-suited for valves and fittings in harsh environments. 5. Nickel Alloy Round Bars: Known for their outstanding resistance to corrosion and high-temperature applications, nickel alloy round bars possess excellent mechanical properties. They are commonly utilized in valves and fittings that handle corrosive fluids or operate in extreme temperatures. When manufacturing valves and fittings, it is crucial to select the appropriate steel round bar based on the specific requirements of the application. Factors to consider include pressure, temperature, fluid compatibility, and environmental conditions.

Q: What are the different safety considerations when working with steel round bars?: When working with steel round bars, there are several safety considerations that need to be taken into account. First and foremost, it is important to wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and steel-toed boots to protect against potential hazards. One of the main safety concerns when handling steel round bars is the risk of injury from sharp edges or burrs. These can cause cuts or puncture wounds if not handled with care. It is crucial to inspect the round bars for any sharp edges or burrs and file them down or use protective coverings if necessary. Another important consideration is the weight of the steel round bars. Depending on their size and length, they can be quite heavy and may require the use of lifting equipment or assistance from another person to prevent strain or back injuries. It is essential to use proper lifting techniques and avoid overexertion when moving or transporting the bars. Fire safety is also a concern when working with steel round bars. Steel can conduct heat and electricity, so it is important to take precautions to prevent sparks or heat sources from igniting flammable materials in the vicinity. Fire extinguishers should be readily available, and the work area should be well-ventilated to minimize the risk of fire or smoke inhalation. Additionally, when cutting or manipulating steel round bars, there is a potential for flying debris or metal chips. Safety goggles or a face shield should be worn to protect the eyes from these hazards. It is also important to use appropriate cutting tools and techniques to prevent accidents or injuries. Finally, it is crucial to have proper training and knowledge of the equipment and machinery used when working with steel round bars. This includes understanding the correct procedures for cutting, bending, or welding the bars, as well as being aware of any specific safety precautions related to the machinery being used. Overall, safety should always be a top priority when working with steel round bars. By following these considerations and taking the necessary precautions, the risk of accidents or injuries can be minimized, ensuring a safe working environment.

Q: What is the difference between a smooth and a precision ground steel round bar?: A smooth steel round bar is a steel rod with a plain surface and no specific surface treatment or finishing process. It is typically made through hot rolling or cold drawing, resulting in a basic cylindrical shape with a relatively rough surface texture. Smooth steel round bars are commonly used in various applications where a smooth exterior finish is not crucial. On the other hand, a precision ground steel round bar goes through an extra manufacturing process to achieve a more precise and refined surface finish. The process involves removing any imperfections or irregularities from the steel rod's surface, resulting in a highly smooth and polished finish. This ensures that the round bar maintains a consistent diameter along its length and has a superior level of finish and accuracy. Precision ground steel round bars are widely used in applications that require tight tolerances, precision machining, or a smooth and polished surface. Industries such as aerospace, automotive, tooling, and manufacturing often rely on precision ground steel round bars for their high-quality surface finish, dimensional accuracy, and reliable performance. In conclusion, the main distinction between a smooth and a precision ground steel round bar lies in the surface finish and level of precision achieved. While a smooth steel round bar has a basic, rough surface texture and is suitable for general applications, a precision ground steel round bar undergoes additional grinding processes to achieve a highly smooth, polished, and accurate surface finish. This makes it ideal for applications requiring tight tolerances and precision machining.

Q: Are steel round bars suitable for the production of hydraulic cylinders?: Steel round bars are indeed appropriate for manufacturing hydraulic cylinders. Steel is renowned for its robustness, longevity, and resistance to corrosion, thus making it an exceptional option for hydraulic purposes. Due to their exceptional tensile strength and capacity to endure substantial loads and pressure, steel round bars are frequently employed in the construction of hydraulic cylinders. Furthermore, steel can be effortlessly machined and welded, enabling accurate production and customization of hydraulic cylinders. In summary, steel round bars possess the essential attributes and capabilities needed for manufacturing hydraulic cylinders.

Q: Can steel round bars be used for making bicycle frames or handlebars?: Yes, steel round bars can be used for making bicycle frames or handlebars. Steel is a commonly used material in the manufacturing of bicycle frames and handlebars due to its strength, durability, and ability to absorb vibrations. Steel round bars provide the necessary structural integrity and rigidity required for these components, making them suitable for use in bicycle frames and handlebars.

Q: What is the tensile strength of a steel round bar?: The tensile strength of a steel round bar can vary depending on the specific grade and manufacturing process. However, in general, steel round bars have a high tensile strength, typically ranging from 400 to 700 megapascals (MPa).

Q: How are steel round bars used in the construction of transmission towers?: Transmission towers commonly use steel round bars due to their strength, durability, and ease of fabrication. These bars, typically made from high-strength carbon steel, come in various diameters to meet different structural needs. In transmission tower construction, steel round bars serve as the primary structural elements. They form the vertical and diagonal members that provide strength and stability to the tower. The bars are connected using welding or bolted connections to create the lattice structure of the tower. The round shape of the bars allows for even distribution of forces, making them ideal for handling the loads and stresses experienced by transmission towers. These loads include the tower's weight, electrical conductors, and environmental factors like wind, ice, and seismic forces. Moreover, steel round bars offer excellent corrosion resistance, which is crucial for transmission towers exposed to harsh weather conditions. This resistance helps extend the tower's lifespan and ensures the safety and reliability of the transmission lines. Additionally, steel round bars can be easily fabricated and customized to meet the specific design requirements of the transmission tower. They can be cut, bent, and shaped to the desired dimensions, providing flexibility in tower design and construction. In conclusion, steel round bars play a crucial role in the construction of transmission towers by providing strength, durability, and corrosion resistance. Their versatility and ability to withstand various loads make them an essential component in ensuring the safe and reliable transmission of electricity.

Q: Are steel round bars recyclable?: Yes, steel round bars are recyclable. Steel is one of the most commonly recycled materials in the world, and round bars made of steel can be easily melted down and reused to make new steel products.

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