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 is the hardness of a steel round bar?: The hardness of a steel round bar can vary depending on the specific type of steel used and the manufacturing process, but it is typically measured on the Rockwell or Brinell hardness scales.

Q: How do steel round bars differ from other types of steel bars?: Steel round bars differ from other types of steel bars primarily in their shape and versatility. Unlike other steel bars such as square or flat bars, steel round bars are cylindrical in shape and have a circular cross-section. This unique shape allows for greater flexibility and adaptability in their usage. One of the main advantages of steel round bars is their ability to withstand high levels of stress and pressure. Due to their circular shape, they distribute weight and pressure evenly, making them ideal for applications that require durability and strength. These bars are often used in construction, manufacturing, and engineering projects where structural integrity is crucial. Another key difference is the ease with which steel round bars can be machined and manipulated. Their cylindrical shape allows for easy drilling, cutting, and shaping, making them highly versatile and suitable for a wide range of applications. They can be easily welded, bent, or formed into various shapes, giving them an advantage over other types of steel bars in terms of customization. In terms of appearance, steel round bars also have a distinct visual appeal. The smooth and cylindrical surface of these bars offers a sleek and polished look, making them aesthetically pleasing in architectural and decorative applications. Overall, steel round bars stand out from other types of steel bars due to their shape, versatility, and strength. Their ability to withstand high levels of stress, ease of machining, and appealing appearance make them a popular choice in various industries.

Q: Can steel round bars be used in the production of bearings?: It is not possible to use steel round bars in the production of bearings. Bearings necessitate particular materials capable of enduring heavy loads and providing minimal friction. Steel round bars lack the essential attributes required to meet these criteria. Instead, bearings are typically manufactured from specialized materials such as chrome steel, stainless steel, or ceramics. These materials exhibit exceptional durability and performance, even in the challenging conditions under which bearings function.

Q: What are the advantages of using tungsten-alloy steel round bars?: There are several advantages of using tungsten-alloy steel round bars. Firstly, tungsten imparts high strength and durability, making these bars suitable for heavy-duty applications. Secondly, tungsten improves the hardness and wear resistance of the steel, increasing its lifespan and reducing the need for frequent replacements. Additionally, tungsten-alloy steel round bars exhibit excellent heat resistance and can withstand high temperatures without losing their mechanical properties. Lastly, these bars have superior corrosion resistance, making them ideal for use in harsh environments or corrosive conditions.

Q: Is there any technique for welding round steel?: The welding position is horizontal fillet welding, to control the size of the weld pool of available elliptic transport method the molten iron is brought up, and then try to consider the position of welding welding (a little more than half of small to)

Q: Can steel round bars be used for making shafts?: Steel round bars are capable of being utilized for the production of shafts. Owing to their exceptional strength and durability, steel round bars find widespread use in various industries for the purpose of shaft fabrication. They possess the ability to endure heavy loads, withstand forces that induce bending and twisting, and exhibit remarkable performance in applications where power transmission or rotational movement is required. Moreover, steel round bars offer commendable machinability, enabling effortless shaping and formation into shafts of diverse sizes and dimensions. Furthermore, heat treatment can be employed to augment the strength and hardness of steel round bars, rendering them even more suitable for shafts operating in demanding environments. In conclusion, steel round bars are an immensely popular choice for shaft production due to their inherent properties and unwavering reliability across a multitude of industrial applications.

Q: What are the common industries that use steel round bars?: Steel round bars are widely used in various industries due to their strength, durability, and versatility. Some of the common industries that heavily rely on steel round bars include construction, manufacturing, automotive, aerospace, energy, and oil and gas. In the construction industry, steel round bars are commonly used in the creation of structural frameworks, such as beams, columns, and trusses. They provide the necessary support and stability required for buildings, bridges, and other infrastructures. Additionally, steel round bars are utilized in reinforcement applications, such as concrete reinforcement bars (rebars), ensuring the structural integrity of various construction projects. The manufacturing industry also extensively utilizes steel round bars for the production of machinery, equipment, and tools. These round bars are often machined, forged, or heat-treated to create components like shafts, gears, fasteners, and bearings. Due to their high tensile strength and resistance to wear and tear, steel round bars are ideal for withstanding heavy loads and harsh operating conditions. In the automotive sector, steel round bars are employed in the manufacturing of various vehicle components, including axles, crankshafts, camshafts, and suspension systems. The use of steel round bars in these critical parts ensures the necessary strength and durability required for safe and reliable transportation. The aerospace industry heavily relies on steel round bars for the production of aircraft components. From landing gear to engine parts and structural elements, steel round bars are essential in ensuring the safety and performance of aircraft. The high strength-to-weight ratio of steel makes it an ideal material for aerospace applications, as it allows for lighter aircraft without compromising strength. Furthermore, the energy industry, including power generation and transmission, utilizes steel round bars in the construction of turbines, generators, and transmission towers. The robustness and corrosion resistance of steel make it suitable for withstanding extreme temperatures and harsh environments. Lastly, the oil and gas industry extensively uses steel round bars for drilling equipment, pipe fittings, valves, and other critical components. These round bars are required to withstand high-pressure and corrosive environments, making them essential for oil and gas exploration, extraction, and transportation. In conclusion, steel round bars find application in a wide range of industries, including construction, manufacturing, automotive, aerospace, energy, and oil and gas. Their strength, durability, and versatility make them a preferred choice for various applications, ensuring the safety, reliability, and efficiency of numerous industrial processes.

Q: Are steel round bars susceptible to rust?: It is true that rust can occur on steel round bars. Rust is the outcome of a chemical reaction involving iron and oxygen in the presence of moisture. Due to the fact that steel is primarily composed of iron, it can rust if it is exposed to air and moisture. Nevertheless, the likelihood of rust can be decreased by taking specific precautionary measures. To establish a barrier between the steel and the surrounding environment, steel round bars can be coated with protective layers such as paint, oil, or galvanized coatings. This effectively prevents or delays the initiation of rust. In order to minimize the risk of rust formation on steel round bars, it is advisable to regularly maintain them by cleaning and reapplying protective coatings.

Q: Are steel round bars suitable for high-temperature applications?: Depending on the specific grade and composition, steel round bars can be used for high-temperature applications. Steel grades like stainless steel and heat-resistant alloys are designed specifically to withstand high temperatures without compromising their mechanical properties. These grades have high melting points, excellent heat resistance, and good oxidation resistance, making them ideal for industries such as aerospace, automotive, and power generation. For instance, stainless steel round bars offer exceptional corrosion resistance and high strength even at elevated temperatures. They can endure temperatures ranging from 800-900 degrees Celsius without significant loss of mechanical properties. Moreover, heat-resistant alloys like Inconel or Hastelloy are employed in extreme high-temperature settings like gas turbines or petrochemical plants, where temperatures can surpass 1000 degrees Celsius. Nevertheless, not all steel round bars are suitable for high-temperature applications. Carbon steels, for instance, are susceptible to oxidation and loss of strength when exposed to elevated temperatures. Low-grade steel round bars may also experience deformation, softening, or even failure under high-temperature conditions. Consequently, it is essential to carefully choose the appropriate steel grade and seek guidance from experts or engineers to determine the suitability of steel round bars for specific high-temperature applications.

Q: How do steel round bars compare to fiberglass or composite bars?: Steel round bars and fiberglass or composite bars exhibit distinct differences in their properties and applications. Strength and Durability: Steel round bars possess exceptional strength and durability, boasting a high tensile strength that enables them to withstand heavy loads and stress. Conversely, fiberglass or composite bars possess a favorable strength-to-weight ratio but generally lack the same level of strength as steel bars. They may be more susceptible to bending or breaking under high pressure or impact. Weight: A significant disparity exists in weight between steel bars and fiberglass or composite bars. This contrast can prove advantageous in certain applications where additional weight is necessary for stability or to counteract external forces. Conversely, situations that prioritize weight reduction, such as in the aerospace or automotive industries, favor fiberglass or composite bars due to their lightweight nature. Corrosion Resistance: Steel bars are prone to corrosion, particularly when exposed to moisture or harsh environments. Consequently, they necessitate regular maintenance and protective coatings to prevent rusting. In contrast, fiberglass or composite bars inherently possess corrosion-resistant properties, rendering them suitable for applications prevalent in marine or chemical industries that often involve exposure to corrosive elements. Electrical Conductivity: Steel round bars boast electrical conductivity, which proves advantageous in specific applications requiring electrical grounding or conductivity. Fiberglass or composite bars, by contrast, are non-conductive and preferred in situations necessitating electrical insulation, such as in electrical installations or sensitive electronic systems. Cost: Steel bars generally offer a more cost-effective solution compared to fiberglass or composite bars. The abundance of raw materials for steel production contributes to their affordability in most cases. Conversely, fiberglass or composite bars involve intricate manufacturing processes and the utilization of specialized materials, leading to higher production costs. In conclusion, steel round bars are favored for their strength, durability, and cost-effectiveness, finding widespread use in construction, manufacturing, and infrastructure projects. Conversely, fiberglass or composite bars present advantages in weight reduction, corrosion resistance, and electrical insulation, frequently finding application in industries that prioritize these properties. The selection between the two hinges upon the specific requirements and conditions of the project or industry.

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