4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 1

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 2

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 3

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 4

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar

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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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Grade:	S45CB, 40Cr, SCM440, SCM420, 42CrMo, AISI4140, customized is available.
Size:	25-450mm
Length:	5.8m/6m fixed length, or as customized.
MOQ:	20MT
Remark:	chamfering and straightness
Packing:	arround 3MT per bundle

Grade	C	Si	Mn	P	S	Cr	Mo
42CrMo4	0.38-0.45	0.17-0.37	0.40-0.70	≤0.035	≤0.035	0.90-1.20	0.15-0.25
1.7225	0.38-0.45	≤0.40	0.60-0.90	≤0.025	≤0.035	0.90-1.20	0.15-0.30
4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.035	≤0.040	0.80-1.10	0.15-0.25

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)

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:Can steel round bars be used in the construction of buildings?: Yes, steel round bars can be used in the construction of buildings. They are commonly used as reinforcement materials in concrete structures due to their high strength and durability. Steel round bars provide structural stability and help resist bending and tensile forces, making them an important component in building construction.

Q:Are steel round bars suitable for architectural applications?: Yes, steel round bars are suitable for architectural applications. Steel is a versatile and durable material that is commonly used in construction and architectural projects. Steel round bars offer several benefits for architectural applications. Firstly, steel round bars are known for their strength and load-bearing capacity. They have excellent tensile strength and can withstand heavy loads, making them suitable for applications where structural integrity is crucial. Whether used as support beams, columns, or in other structural elements, steel round bars offer a reliable and long-lasting solution. Additionally, steel round bars are highly resistant to corrosion and fire, which is essential for architectural applications. They can withstand harsh weather conditions, including extreme temperatures, without compromising their structural integrity. This resistance to corrosion and fire makes steel round bars a safe and reliable choice for architectural projects. Furthermore, steel round bars can be easily fabricated and customized to meet specific design requirements. They can be cut, welded, bent, and shaped into various forms, allowing architects and designers to create unique and innovative structures. The versatility of steel round bars makes them suitable for a wide range of architectural applications, including bridges, stadiums, and high-rise buildings. Moreover, steel round bars are cost-effective compared to some other building materials. They have a longer lifespan and require minimal maintenance, reducing the overall lifecycle costs of a project. This cost-effectiveness, combined with their durability and versatility, makes steel round bars a popular choice in architectural applications. In conclusion, steel round bars are indeed suitable for architectural applications. Their strength, resistance to corrosion and fire, ease of fabrication, and cost-effectiveness make them an ideal choice for a wide range of architectural projects. Whether used for structural elements or decorative purposes, steel round bars offer a reliable and aesthetically pleasing solution for architects and designers.

Q:What is the corrosion resistance of steel round bars?: The corrosion resistance of steel round bars depends on the specific type of steel used and any additional coatings or treatments that have been applied. Generally, stainless steel round bars have excellent corrosion resistance due to their high levels of chromium and nickel, which form a protective oxide layer on the surface. However, carbon steel round bars are more susceptible to corrosion and may require additional protection such as galvanization or painting to enhance their resistance.

Q:Can steel round bars be used for making oil and gas industry components?: Yes, steel round bars can be used for making oil and gas industry components. Steel round bars are commonly used in the oil and gas industry due to their high strength, durability, and resistance to corrosion. These components require materials that can withstand harsh environments, high pressures, and extreme temperatures, and steel round bars meet these criteria. They are commonly used to manufacture various components such as valves, flanges, pipes, and fittings, which are vital for the functioning of the oil and gas industry. Additionally, steel round bars can be easily machined and welded, allowing for the fabrication of complex shapes and structures required in this industry. Overall, steel round bars are a reliable and widely used material for making oil and gas industry components.

Q:How do you calculate the torsional strength of a steel round bar?: To determine the torsional strength of a steel round bar, it is necessary to take into account its material properties and dimensions. The torsional strength, also referred to as torsional yield strength or shear strength, denotes the maximum torque or twisting force that a round bar can endure without experiencing permanent deformation or failure. The torsional strength can be calculated using the following formula: Torsional Strength = (Torsional Constant * Yield Strength) / (Polar Moment of Inertia * Length) 1. Torsional Constant: This constant relies on the shape of the round bar's cross-section. In the case of a solid round bar, the torsional constant is given by (π * D^4) / 32, where D represents the bar's diameter. 2. Yield Strength: This is the stress at which the steel material starts to plastically deform. It is typically provided by the manufacturer or can be determined through material testing. 3. Polar Moment of Inertia: This property signifies the round bar's resistance to torsional deformation. For a solid round bar, the polar moment of inertia equals (π * D^4) / 32. 4. Length: This denotes the extent of the round bar where the torsional force is applied. By substituting these values into the formula, the torsional strength of the steel round bar can be calculated. It is important to note that this computation assumes the round bar is completely homogeneous, devoid of any defects, and subjected solely to pure torsion. It is crucial to bear in mind that torsional strength is just one factor to consider when assessing the suitability of a steel round bar for a specific application. Other considerations, such as fatigue strength, corrosion resistance, and load-bearing capacity, should also be taken into account. For accurate calculations and appropriate material selection, it is advisable to consult a professional engineer or refer to pertinent industry standards.

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.

Q:Can steel round bars be used in the production of construction equipment?: Steel round bars are indeed capable of being utilized in the production of construction equipment. The construction industry frequently relies on steel round bars for their exceptional characteristics, including strength, durability, and versatility. These bars can be effectively employed in the creation of various construction equipment components, such as axles, shafts, gears, and structural supports. Thanks to their remarkable tensile strength, steel round bars ensure that the equipment can effectively endure heavy loads and challenging operating conditions. Furthermore, their machinability and weldability render them highly suitable for the fabrication processes involved in manufacturing construction equipment. All in all, steel round bars represent a reliable and extensively used material within the construction industry for the production of construction equipment.

Q:Can steel round bars be used for making furniture?: Yes, steel round bars can be used for making furniture. Steel is a durable and sturdy material, which makes it suitable for creating various types of furniture such as tables, chairs, and shelves. The round bars can be shaped and welded to fit the desired design, providing a modern and industrial look to the furniture.

Q:Can steel round bars be used for shafts or axles?: Yes, steel round bars can be used for shafts or axles. Steel round bars are commonly used for these applications due to their high strength, durability, and ability to withstand heavy loads and torsional forces. They can be machined and shaped to fit specific requirements, making them suitable for various industrial and mechanical applications.

Q:What is the difference between a solid and a hollow steel round bar?: A cylindrical bar made entirely of solid steel material is called a solid steel round bar. It is completely filled and does not have any empty spaces inside. On the other hand, a hollow steel round bar is also cylindrical but has a hollow center, meaning there is empty space or a void within the bar. The primary distinction between a solid and a hollow steel round bar is their structural composition and the roles they fulfill. A solid steel round bar is typically used in applications where strength and durability are of utmost importance. It is commonly employed in construction, manufacturing, and engineering projects that require load-bearing capacity. Conversely, a hollow steel round bar is designed to be lighter in weight while still maintaining structural integrity. The hollow center allows for weight reduction while still providing sufficient strength for various applications. Hollow steel round bars are often utilized in industries such as aerospace, automotive, and marine, where reducing weight is crucial for enhanced fuel efficiency and overall performance. Furthermore, the empty space inside a hollow steel round bar also presents an opportunity for customization. It can be utilized to house other components, such as wires or piping, enabling a more streamlined and efficient design. This versatility makes hollow steel round bars suitable for various applications that necessitate both strength and weight reduction. In conclusion, the main difference between a solid and a hollow steel round bar lies in their structural composition and the roles they fulfill. Solid steel round bars are employed in applications that demand maximum strength and durability, while hollow steel round bars offer weight reduction and customization options, making them suitable for applications that prioritize lightweight design without compromising structural integrity.

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