C22 Carbon Steel Round Bars

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.37-0.44 %	Tensile strength(MPA)	≥980(100)
Si	0.17-0.37 %	Yield strength (MPA)	≥785(80)
Mn	0.50-0.80 %	Elongation (δ5/%)	≥9
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.30 %	Impact (J)	≥ 47
P	≤0.035 %	Impact toughness value αkv (J/cm2)	≥59(6)
S	≤0.035 %	Hardness	≤207HB
Cu	≤0.030 %

Grade/Material	1020 1045 4140 4130 4150 ASTM A36 A105 S20C S45c SCM440
Available sizes	Round: Dia. 9.5–300mm Square:88-160160mm Flat: Thickness 10–120mm, width 305 – 2200mm
Size tolerance	Length tolerance:+100mm/-0mm Straigthness:<=3mm/m
Delivery condition	Hot rolled or cold drawn or forged, turned or black surface, annealed or QT as customer’s request
Applications	Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.
Inspection	100% Ultrasonic according to the test standards: SEP1921-84,GR.3 CLASS C/C
Packing situation	In bundle or as customer required
Process	EAF+LF+VD ( necessary) +UT+ Peeled(optional) +Turned (optional) + Heat Treatment (optional)
Delivery time	30days after the down payment
Payment term	T/T or L/C

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

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 advantages of using steel round bars over other materials?: Steel round bars have numerous advantages compared to other materials: 1. Strength and durability: Known for their remarkable strength and durability, steel round bars are perfect for a wide range of applications. They can withstand heavy loads and resist deformation, making them ideal for structural purposes. 2. Versatility: Steel round bars offer tremendous versatility due to their various sizes, grades, and finishes. They can be easily customized to meet specific requirements, such as different lengths, diameters, and surface finishes. 3. Cost-effectiveness: Steel round bars provide a cost-effective solution when compared to other materials. They are readily available and affordable, thanks to their abundance and efficient manufacturing processes. Moreover, their high strength-to-weight ratio allows for the use of smaller quantities of steel without compromising strength. 4. Corrosion resistance: Steel round bars can be produced with different finishes, including galvanized or stainless steel, which enhances their resistance to corrosion. This enables them to be suitable for outdoor applications or environments where they may encounter moisture or chemicals. 5. Machinability: Steel round bars are highly regarded for their excellent machinability, allowing for easy cutting, drilling, or shaping according to specific design requirements. This characteristic promotes efficient processing and reduces production costs. 6. Fire resistance: Steel is inherently fire-resistant and does not contribute to the spread of flames. Consequently, steel round bars are the preferred choice in applications where fire safety is a concern, such as construction or industrial settings. 7. Recyclability: Steel is highly recyclable, making steel round bars an environmentally friendly option. They can be easily melted down and reused to create new steel products without compromising their properties or strength. In summary, the advantages of using steel round bars over other materials include their strength, durability, versatility, cost-effectiveness, corrosion resistance, machinability, fire resistance, and recyclability. These factors make steel round bars the preferred choice in various industries, including construction, manufacturing, automotive, and infrastructure projects.

Q:Can steel bars be replaced by large screws in the concrete floor?: Tensile strength, extensibility, yield point! The same thread can be used instead!Of course, the number of roots must also be the same ~ only specifications vary!

Q:How do steel round bars perform under cyclic loading?: Steel round bars exhibit excellent performance under cyclic loading due to their high strength and ductility, enabling them to withstand significant stress without deformation or failure. The fatigue characteristics of steel round bars are influenced by various factors, including material composition, heat treatment, and surface finish. Bars with higher tensile strength and hardness demonstrate superior fatigue resistance, enabling them to endure higher stress levels before failure. Cyclic loading subjects steel round bars to stress cycles that induce alternating compression and tension forces. These cycles can initiate and propagate cracks, ultimately leading to failure. However, steel's inherent ductility allows it to absorb energy and redistribute stress, thereby mitigating crack propagation and extending the bar's fatigue life. Fatigue strength assessments typically involve subjecting steel round bars to a specified number of stress cycles until failure occurs. These tests yield valuable information on the bar's endurance limit and fatigue life under different loading conditions. Various techniques, such as shot peening, surface coating, and induction of residual stress, can be employed to enhance the fatigue performance of steel round bars. These techniques introduce compressive stress on the bar's surface, inhibiting crack initiation and propagation, thereby improving fatigue resistance. In summary, steel round bars are reliable and durable when subjected to cyclic loading, making them suitable for applications involving repeated or fluctuating stresses, such as structural components, automotive parts, and machinery components. However, careful consideration of loading conditions, material properties, and design criteria is necessary to ensure optimal performance and longevity when selecting steel round bars.

Q:What are the advantages of using nickel-alloy steel round bars?: There are several advantages of using nickel-alloy steel round bars: 1. High strength and durability: Nickel-alloy steel round bars are known for their superior strength and durability. They can withstand high levels of stress and provide excellent resistance to corrosion, making them ideal for applications in harsh environments. 2. Enhanced temperature resistance: Nickel-alloy steel round bars have excellent temperature resistance properties, allowing them to maintain their strength and integrity even at elevated temperatures. This makes them suitable for use in high-temperature applications such as aerospace, power generation, and petrochemical industries. 3. Improved corrosion resistance: Nickel-alloy steel round bars exhibit exceptional corrosion resistance, making them highly resistant to rust and oxidation. This characteristic makes them ideal for use in marine environments, chemical plants, and other applications where exposure to corrosive substances is common. 4. Excellent mechanical properties: Nickel-alloy steel round bars possess excellent mechanical properties such as high tensile strength, toughness, and ductility. This enables them to withstand heavy loads and impacts without deformation or failure, making them suitable for use in critical structural applications. 5. Versatility and adaptability: Nickel-alloy steel round bars can be easily machined, forged, and welded, allowing for greater versatility in manufacturing processes. They can be shaped and formed into various sizes and dimensions to meet specific application requirements, making them highly adaptable to different industries. 6. Cost-effective solution: While nickel-alloy steel round bars may have a higher initial cost compared to other materials, their long-term cost-effectiveness makes them a preferred choice for many industries. Their resistance to corrosion and wear reduces maintenance and replacement costs, ultimately resulting in significant cost savings over time. In conclusion, the advantages of using nickel-alloy steel round bars lie in their high strength, enhanced temperature resistance, improved corrosion resistance, excellent mechanical properties, versatility, adaptability, and cost-effectiveness. These qualities make them a reliable and efficient choice for a wide range of applications in various industries.

Q:What are the advantages of using tool steel round bars?: There are several advantages to using tool steel round bars. Firstly, tool steel round bars offer exceptional hardness and wear resistance. This makes them ideal for applications where the material needs to withstand high levels of stress, such as in the manufacturing of cutting tools, dies, and molds. The hardness of tool steel also allows for precise machining, resulting in accurate and intricate shapes. Secondly, tool steel round bars have excellent toughness and impact resistance. This means that they can withstand heavy-duty applications without breaking or cracking. This makes them suitable for use in demanding industries such as aerospace, automotive, and construction. Furthermore, tool steel round bars are known for their high temperature resistance. They can maintain their hardness and strength even under extreme heat conditions. This feature is particularly advantageous in applications where the material is exposed to high temperatures, such as in forging or heat treating operations. Another advantage of using tool steel round bars is their dimensional stability. They have a low coefficient of thermal expansion, meaning they do not undergo significant dimensional changes when exposed to temperature variations. This makes them highly reliable and predictable in various operating conditions. Moreover, tool steel round bars can be easily machined and heat treated to achieve specific properties. This versatility allows manufacturers to tailor the material to their specific needs, enhancing the overall performance of the end product. Lastly, tool steel round bars are readily available and cost-effective. They are widely produced and stocked by suppliers, making them easily accessible for various applications. Additionally, their long lifespan and resistance to wear and tear contribute to their cost-effectiveness. In conclusion, the advantages of using tool steel round bars include exceptional hardness, toughness, high temperature resistance, dimensional stability, versatility, availability, and cost-effectiveness. These properties make them a preferred choice in industries where durability, precision, and reliability are crucial.

Q:1, three, two, steel, wire rod, round steel what is the difference?: Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Among them, 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.

Q:How do steel round bars perform under impact or shock loading?: Steel round bars are known for their exceptional performance under impact or shock loading. Due to their high strength and toughness, steel round bars can withstand sudden forces and resist deformation or failure. The inherent properties of steel, such as its hardness and ductility, contribute to its ability to absorb energy and distribute it throughout the material, minimizing the impact on the structure. When subjected to impact or shock loading, steel round bars undergo plastic deformation, which allows them to absorb the applied energy without breaking. The ability to absorb energy is crucial in various applications, such as construction, automotive, and machinery industries, where components are often subjected to dynamic loads. Additionally, steel's excellent fatigue resistance further enhances its performance under impact or shock loading. Even when subjected to repeated impacts, steel round bars can withstand the cyclic loading without undergoing significant degradation in their mechanical properties. Moreover, steel round bars can be further enhanced through various heat treatment processes, such as quenching and tempering, to improve their resistance to impact or shock loading. These processes help to refine the microstructure of the steel, resulting in increased strength, toughness, and hardness. In conclusion, steel round bars have a remarkable performance under impact or shock loading. Their high strength, toughness, and ability to absorb energy make them reliable and widely used in applications where sudden forces or dynamic loads are expected.

Q:What are the applications of steel round bars in the aerospace industry?: Steel round bars are widely used in the aerospace industry due to their exceptional strength, durability, and versatility. These bars are utilized in various applications, including: 1. Structural Components: Steel round bars are commonly used in the production of structural components in the aerospace industry. They are used for manufacturing aircraft frames, landing gear, wing spars, and other critical structural elements. The high tensile strength of steel ensures the structural integrity and safety of the aircraft. 2. Fasteners: Steel round bars are also used to produce fasteners such as bolts, screws, and pins. These fasteners play a crucial role in holding different parts of the aircraft together. Steel's strength and resistance to fatigue make it an ideal material for these critical connections. 3. Engine Components: Steel round bars find application in the production of various engine components. They are used to manufacture shafts, crankshafts, connecting rods, and turbine blades. These components need to withstand high temperatures, pressure, and mechanical stress, and steel's heat resistance and strength make it suitable for these demanding conditions. 4. Landing Gear: The landing gear of an aircraft is subjected to immense stress during takeoff, landing, and taxiing. Steel round bars are used in the construction of landing gear components such as axles and struts. The high strength and toughness of steel ensure the landing gear's ability to withstand the forces encountered during landing operations. 5. Tooling and Fixtures: Steel round bars are used to manufacture tooling and fixtures necessary for the production and maintenance of aircraft. These tools and fixtures are employed in various processes, including machining, assembly, and inspection. Steel's hardness and machinability make it an ideal material for these applications. In summary, steel round bars have numerous applications in the aerospace industry, ranging from structural components to fasteners, engine parts, landing gear, and tooling. The unique combination of strength, durability, and versatility offered by steel makes it an essential material in ensuring the performance, safety, and reliability of aerospace systems.

Q:What are the considerations for selecting the right steel grade for a round bar?: When selecting the right steel grade for a round bar, there are several considerations to take into account. Firstly, the intended application of the round bar must be evaluated, as different steel grades offer varying levels of strength, hardness, and corrosion resistance. Additionally, factors such as the desired machinability, weldability, and heat treatability should be considered. Furthermore, the environmental conditions in which the round bar will be used, such as temperature and exposure to chemicals, play a crucial role in determining the appropriate steel grade. Lastly, budget constraints and availability of the steel grade should also be taken into consideration. Overall, a thorough analysis of the application requirements and an understanding of the properties of different steel grades are key considerations in selecting the right steel grade for a round bar.

Q:How do you straighten steel round bars?: Different methods can be employed to straighten steel round bars, depending on the desired precision and the size of the bars. Below are a few commonly used techniques: 1. Manual Straightening: This approach is applicable for smaller diameter round bars. Place the bar on a flat surface and exert pressure on the bent section using either a hydraulic or a manual press. Gradually increase the force until the bar is straightened. This method is relatively straightforward but may not yield flawless results. 2. Heat Straightening: Heat straightening is effective for larger diameter round bars or bars with significant bends. Heat the bent section using an oxy-acetylene torch until it turns red hot. Once heated, apply pressure in the opposite direction of the bend using hydraulic or manual tools. The heat softens the steel, making it easier to manipulate. Caution must be exercised not to overheat the steel, as it could compromise its structural integrity. 3. Roller Straightening: This method is commonly employed in industrial environments and is suitable for larger diameter round bars. Pass the bar through a series of rollers that apply pressure to the bent section, gradually straightening it. This technique provides precise and uniform results but necessitates specialized equipment. 4. Hydraulic Press Straightening: For precise straightening, a hydraulic press can be utilized. Position the bar between two parallel plates and exert pressure using the hydraulic press. Gradually increase the force until the bar is straightened. This method is suitable for bars with minor bends and offers precise control over the straightening process. It is important to note that while these methods can straighten steel round bars, their effectiveness may vary depending on the severity of the bend, the quality of the steel, and the equipment utilized. It is advisable to seek guidance from a professional or adhere to industry-specific guidelines to ensure the safe and accurate straightening of steel round bars.

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