45# Carbon Steel Material

Ref Price:

Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 120000 m.t./month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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 alloying elements used in steel round bars?: There are several alloying elements that can be used in the production of steel round bars. These elements are added to enhance the properties of the steel and improve its strength, durability, and other specific characteristics. Some of the commonly used alloying elements in steel round bars include: 1. Carbon: Carbon is the primary alloying element in steel and helps to increase its hardness and strength. The carbon content in steel round bars usually ranges from 0.2% to 2.1%. 2. Chromium: Chromium is added to steel to improve its resistance to corrosion and oxidation. It also enhances the steel's hardness, strength, and wear resistance. Stainless steel round bars often contain chromium as a major alloying element. 3. Nickel: Nickel is commonly used in stainless steel round bars to improve their corrosion resistance and enhance their mechanical properties. It also increases the toughness and strength of the steel. 4. Manganese: Manganese is added to steel to improve its hardenability, strength, and wear resistance. It also contributes to the steel's ability to withstand impact and shock loading. 5. Molybdenum: Molybdenum is often used in steel round bars to enhance their strength, toughness, and resistance to corrosion. It also improves the steel's high-temperature strength and creep resistance. 6. Vanadium: Vanadium is added to steel to improve its strength, toughness, and wear resistance. It also helps in refining the steel's grain structure, which enhances its mechanical properties. 7. Tungsten: Tungsten is used in steel round bars to increase their hardness, strength, and resistance to wear and corrosion. It also improves the steel's high-temperature strength and toughness. 8. Silicon: Silicon is added to steel to improve its strength, hardness, and resistance to oxidation. It also helps in deoxidizing the steel during the manufacturing process. 9. Copper: Copper is sometimes used as an alloying element in steel to improve its corrosion resistance, thermal conductivity, and electrical conductivity. These are just some of the alloying elements that can be used in steel round bars. The specific combination and proportion of these elements depend on the desired properties of the steel and the intended application of the round bars.

Q: Can steel round bars be used in corrosive environments?: Steel round bars can be used in corrosive environments depending on the specific grade of steel and the severity of the corrosive conditions. Stainless steel round bars, for example, have high resistance to corrosion and are commonly used in corrosive environments. However, regular carbon steel round bars may be susceptible to corrosion and would require additional protective coatings or treatments to be used effectively in such conditions.

Q: What are the different types of threads used for steel round bars?: The usage of various thread types for steel round bars depends on the specific application and requirements. The most common thread types for steel round bars are as follows: 1. Unified National Coarse (UNC) Thread: This thread type is widely utilized for general-purpose applications and offers a relatively coarse pitch. It is suitable for most common applications that do not demand high strength. 2. Unified National Fine (UNF) Thread: UNF threads have a finer pitch compared to UNC threads and provide better resistance to vibration. They are commonly employed in applications that require a higher level of thread engagement and improved thread performance. 3. Metric Thread: Metric threads are prevalent in countries that adopt the metric system. They are characterized by their pitch, which determines the distance between each thread. Metric threads offer a precise and standardized threading solution for diverse applications. 4. Acme Thread: Acme threads possess a trapezoidal shape and find frequent use in applications necessitating high strength and resistance to wear and tear. They are often employed in heavy-duty machinery like lead screws, jackscrews, and power transmission systems. 5. Buttress Thread: Buttress threads have a triangular shape, with one side perpendicular to the thread axis. This unique design enables them to bear high loads and resist axial forces in a specific direction. Buttress threads are commonly found in applications involving high-pressure fluid flow, such as hydraulic cylinders and pumps. 6. Whitworth Thread: Whitworth threads were extensively used in the past but have become less common in modern times. They have a rounded profile and a coarse pitch. Whitworth threads can still be found in older machinery and equipment. Choosing the appropriate thread type for a specific application is crucial to ensure the proper fit, functionality, and durability of the steel round bar. Factors such as load requirements, environmental conditions, compatibility with mating parts, and industry standards will determine the suitable thread type for a given situation.

Q: Can steel round bars be extruded?: No, steel round bars cannot be extruded. Extrusion is a manufacturing process that involves forcing material through a die to create a specific shape or profile. While steel can be extruded into various shapes, such as tubes, channels, or angles, round bars are typically not produced by extrusion. Instead, steel round bars are usually made through a different process called hot rolling, where a cylindrical billet is heated and passed through a series of rollers to achieve the desired diameter and length.

Q: How do you straighten a bent steel round bar?: To straighten a bent steel round bar, there are a few simple steps you can follow: 1. Assess the bend: Determine the severity and location of the bend in the round bar. This will help you choose the appropriate method for straightening it. 2. Heat the bar: If the bend is not too severe, you can use a blowtorch or forge to heat the bar. Apply heat evenly to the bent area until it turns red hot. Heating the bar will make it more flexible and easier to straighten. 3. Apply pressure: Once the bar is heated, you can use a vice or hydraulic press to apply pressure to the bent section. Gradually increase the pressure until the bar starts to straighten. Be cautious not to exert excessive force, as it may cause the bar to break. 4. Utilize leverage: If the bend is not too severe, you can also straighten the bar by using leverage. Secure one end of the bar in a vice or clamp and apply force to the bent section in the opposite direction. Slowly and gently increase the force until the bar straightens. 5. Cold bending: If the bend is minor, you may be able to straighten the bar without applying heat. This method involves using a hammer or mallet to lightly tap the bent area in the opposite direction until it becomes straight. Be careful not to strike the bar too forcefully, as it may create new bends or fractures. 6. Check for straightness: After applying the straightening method, carefully examine the bar to ensure it is straight. If there are any remaining bends, repeat the process until the bar is completely straight. Always remember to wear appropriate safety gear, such as gloves and eye protection, when working with steel bars. If you are uncertain about the straightening process or if the bar is severely bent, it is advisable to seek guidance from a professional.

Q: Are steel round bars used in the construction industry?: Yes, steel round bars are commonly used in the construction industry. They are often used as structural elements, such as reinforcement in concrete structures, as well as in the fabrication of various components and fittings.

Q: What are the advantages of using nickel-aluminum alloy steel round bars?: Nickel-aluminum alloy steel round bars offer numerous advantages. Firstly, they provide excellent resistance to corrosion, making them suitable for use in environments exposed to moisture, chemicals, or extreme temperatures. This resistance prolongs the lifespan of the bars and reduces the need for frequent maintenance or replacement. Secondly, these round bars demonstrate exceptional strength and toughness, making them ideal for structural applications requiring durability and reliability. Their high strength enables them to withstand heavy loads and impacts without deforming or breaking, ensuring the integrity of the structure. In addition, nickel-aluminum alloy steel round bars possess good heat resistance, allowing them to withstand high temperatures without losing their mechanical properties. This makes them suitable for applications involving heat or thermal cycling, while also maintaining their shape and strength under extreme temperature variations. Furthermore, these round bars exhibit excellent machinability, enabling easy cutting, drilling, and shaping into various forms. This versatility reduces manufacturing time and costs, and also facilitates customization to meet specific design requirements. Moreover, nickel-aluminum alloy steel round bars have good weldability, allowing them to be easily joined to other materials without compromising their mechanical properties. This enables the construction of complex structures or assemblies that require the combination of different materials. In summary, the advantages of nickel-aluminum alloy steel round bars include corrosion resistance, high strength and toughness, heat resistance, good machinability, and weldability. These properties make them a reliable and versatile choice for a wide range of applications in industries such as aerospace, automotive, construction, and marine.

Q: How are steel round bars tested for quality and compliance?: To ensure quality and compliance, steel round bars undergo a series of rigorous tests and inspections. The most commonly used test is the tensile test, which measures the bar's ability to withstand pulling forces. By stretching the bar until it breaks and analyzing the stress-strain curve, its mechanical properties, including yield strength, ultimate tensile strength, and elongation, can be determined. Another important test is the hardness test, which assesses the bar's surface resistance to indentation. This test helps determine the material's strength and its ability to resist wear and deformation. Chemical analysis is conducted to verify the composition of the steel round bars. This test determines the percentage of elements present, such as carbon, manganese, silicon, sulfur, and phosphorus. It ensures that the steel meets the required specifications and is suitable for its intended application. Dimensional inspection is crucial to ensure that the steel round bars meet the specified dimensions and tolerances. This involves using calibrated instruments to measure the length, diameter, and straightness of the bars. The surface quality is assessed through visual inspection and non-destructive testing methods, such as ultrasonic testing and magnetic particle inspection. These tests detect any surface defects, cracks, or discontinuities that may affect the bar's performance and integrity. Additionally, specialized tests may be conducted based on the intended application of the steel round bars. For example, bars used in the construction industry may undergo corrosion resistance or impact testing. In summary, the quality and compliance of steel round bars are assured through a comprehensive range of tests, inspections, and analyses. These tests enable manufacturers and customers to determine the suitability and reliability of the bars for specific applications, ensuring the safety and effectiveness of the final products.

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: How do steel round bars perform in high-temperature environments?: Steel round bars generally perform well in high-temperature environments due to their high heat resistance and thermal stability. The composition and manufacturing process of steel bars allow them to retain their mechanical properties, such as strength and hardness, even at elevated temperatures. However, the specific performance of steel round bars in high-temperature environments can vary depending on factors like the grade of steel, duration of exposure, and the presence of corrosive agents.

Send your message to us

*Email

*TEL

*Quantity

*Unit