Alloy Steel Round Bars 42CrMo4

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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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GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

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

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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.

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EXW, FOB, CIF, FFR, CNF

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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 nickel-manganese alloy steel round bars?: There are several advantages of using nickel-manganese alloy steel round bars in various applications. Firstly, nickel-manganese alloy steel round bars offer excellent strength and toughness. The addition of nickel and manganese enhances the overall strength and durability of the steel, making it suitable for heavy-duty applications that require high strength and resistance to wear and tear. This makes the alloy steel round bars ideal for industries such as construction, automotive, and manufacturing. Secondly, nickel-manganese alloy steel round bars have excellent corrosion resistance properties. The nickel content in the alloy provides exceptional resistance to corrosion, making it suitable for applications in harsh environments or where exposure to corrosive substances is common. This corrosion resistance extends the lifespan of the round bars and reduces the need for frequent maintenance or replacement. Another advantage of using nickel-manganese alloy steel round bars is their excellent heat resistance. The alloy steel can withstand high temperatures without losing its structural integrity, making it suitable for applications that involve exposure to extreme heat or thermal cycles. This heat resistance property makes the round bars ideal for use in industries such as aerospace, power generation, and oil and gas. Furthermore, nickel-manganese alloy steel round bars offer good weldability and machinability. The alloy's composition allows for easy welding and machining, enabling manufacturers to fabricate components or structures with ease. This versatility in processing makes the round bars highly adaptable to different manufacturing processes and requirements. Additionally, nickel-manganese alloy steel round bars have good ductility and formability. The alloy's composition allows it to be easily shaped or formed into various configurations without sacrificing its structural integrity. This formability makes it suitable for applications that require complex shapes or intricate designs. Overall, the advantages of using nickel-manganese alloy steel round bars include excellent strength, corrosion resistance, heat resistance, weldability, machinability, and formability. These properties make the round bars a reliable and versatile choice for a wide range of applications in various industries.

Q: What are the limitations of steel round bars?: When selecting the appropriate material for a specific application, it is important to consider the limitations associated with steel round bars. Firstly, weight is a significant factor to consider. Steel round bars can be quite heavy, especially in larger diameters. This can pose challenges during transportation and installation, especially in situations where weight restrictions are a concern. Secondly, corrosion is another limitation of steel round bars. Although steel is known for its strength and durability, it is susceptible to rust and deterioration when exposed to moisture or certain chemicals. To mitigate this, protective coatings can be used or stainless steel round bars can be chosen as they are more resistant to corrosion. Thirdly, machinability is a challenge with steel round bars due to their high hardness and strength. This can result in increased tool wear, reduced cutting speeds, and longer machining times, leading to higher production costs. Cost is also an important consideration. Steel round bars, especially those made from high-quality alloys, can be relatively expensive compared to other materials. This cost factor may limit their use in applications with budget constraints. In terms of design flexibility, steel round bars come in standard sizes and shapes, which may restrict design options in some cases. Additional processing steps such as cutting or forging may be necessary to achieve a specific shape or size, adding to the overall production cost. Lastly, fatigue strength is a limitation of steel round bars. Although they have excellent strength properties, they can be prone to fatigue failure under repeated or cyclic loading. This is particularly relevant in applications where the material is constantly subjected to stress or vibration. Despite these limitations, steel round bars are still widely used in various industries due to their exceptional strength, reliability, and versatility. However, it is crucial to carefully consider these factors to ensure that the chosen material meets the specific requirements of the intended application.

Q: What is the difference between a centerless ground and a rough turned steel round bar?: The manufacturing processes and resulting surface finishes of a centerless ground steel round bar and a rough turned steel round bar differ. To produce a centerless ground steel round bar, the bar is fed through a grinding machine. This machine removes material from the surface, achieving precise diameter and roundness tolerances. The bar is rotated between two grinding wheels, while pressure is applied to remove imperfections and create a smooth, polished surface. The end result is a highly accurate and consistent diameter, with a mirror-like finish. This makes it suitable for applications that require tight tolerances and a polished appearance. On the other hand, a rough turned steel round bar is manufactured using a different machining process called turning. In this process, the bar is rotated against a cutting tool, which removes material from the surface to achieve the desired diameter and shape. However, turning does not provide the same level of precision and surface finish as centerless grinding. The resulting surface of a rough turned bar will have visible tool marks and a rougher texture compared to a centerless ground bar. In conclusion, the main distinction between a centerless ground steel round bar and a rough turned steel round bar lies in their manufacturing processes and resulting surface finishes. Centerless grinding offers a more precise diameter, roundness, and smoother surface finish, making it ideal for applications that require tight tolerances and a polished appearance. Rough turning, while less precise and with a rougher surface finish, is still suitable for applications that do not require the same level of precision or aesthetic appeal.

Q: Are steel round bars available in different lengths?: Indeed, there is a variety of lengths for steel round bars. These bars are designed in diverse lengths to cater to various needs and applications. The range of lengths may differ depending on the supplier or manufacturer. Typically, steel round bars are commonly available in lengths between 6 and 12 feet. However, it is also possible to acquire custom lengths through special requests. This wide range of options grants more flexibility in construction and fabrication projects, as it facilitates the ability to cut or modify the bars according to specific requirements.

Q: What are the advantages of using wear-resistant steel round bars?: There are several advantages of using wear-resistant steel round bars: 1. Enhanced durability: Wear-resistant steel round bars are specifically designed to withstand high levels of abrasion and wear. They have a high hardness level and are resistant to surface damage caused by friction, impact, or scraping. This results in a longer lifespan of the round bars, reducing the need for frequent replacements. 2. Increased strength: Wear-resistant steel round bars possess exceptional strength properties, allowing them to withstand heavy loads and extreme conditions. This makes them suitable for a wide range of applications, such as in industries like mining, construction, manufacturing, and transportation, where strength and resilience are crucial. 3. Improved safety: The use of wear-resistant steel round bars ensures a safer working environment. Their high resistance to wear minimizes the risk of accidents and injuries caused by equipment failures or structural damage. This is particularly important in industries where heavy machinery, tools, or structures are involved. 4. Cost-effectiveness: Although wear-resistant steel round bars may have a higher initial cost compared to regular steel bars, their extended lifespan and reduced maintenance requirements make them a cost-effective choice in the long run. The reduced need for replacements and repairs leads to lower downtime, increased productivity, and ultimately, decreased operational costs. 5. Versatility: Wear-resistant steel round bars can be used in a variety of applications due to their versatility. They can be easily machined, welded, or formed into different shapes and sizes to meet specific requirements. This flexibility allows for their use in various industries and applications, making them an ideal choice for many projects. In summary, the advantages of using wear-resistant steel round bars include enhanced durability, increased strength, improved safety, cost-effectiveness, and versatility. These properties make them a reliable and efficient option for applications where wear and tear are significant concerns.

Q: What are the different grades of steel round bars available?: There are various grades of steel round bars available, each with different properties and applications. Some common grades include: 1. Mild Steel: This grade is the most commonly used and affordable option. It has a low carbon content and is easy to weld, cut, and form. Mild steel round bars are suitable for general construction projects, fabrication, and manufacturing. 2. Carbon Steel: With a higher carbon content than mild steel, carbon steel round bars offer greater strength and hardness. They are often used in applications that require high strength, such as machinery parts, shafts, and axles. 3. Alloy Steel: Alloy steel round bars are made by adding various alloying elements such as chromium, nickel, manganese, or molybdenum to improve specific properties. These bars offer enhanced strength, toughness, and wear resistance, making them suitable for applications like automotive parts, gears, and tools. 4. Stainless Steel: Stainless steel round bars are corrosion-resistant and have excellent mechanical properties. They are widely used in industries such as construction, food processing, and medical equipment manufacturing. Different grades of stainless steel, such as 304, 316, or 410, offer varying levels of corrosion resistance and strength. 5. Tool Steel: Tool steel round bars are specifically designed for making tools and dies. They have high hardness, wear resistance, and heat resistance properties. Tool steel grades like D2, A2, or O1 are commonly used for making cutting tools, molds, and dies. It's essential to select the appropriate grade of steel round bars based on the specific requirements of your project, considering factors such as strength, corrosion resistance, hardness, and machinability. Consulting with a steel supplier or an engineer can help identify the most suitable grade for your application.

Q: How do I calculate the length of a steel round bar based on weight?: In order to determine the length of a steel round bar based on its weight, there are a few factors to consider. Firstly, you must be aware of the density of steel, which typically ranges around 7850 kilograms per cubic meter. However, it's worth noting that this value can vary depending on the specific type and grade of steel being utilized. After obtaining the density value, the next step involves converting the weight of the steel round bar into kilograms if it is initially given in a different unit. For instance, if the weight is provided in pounds, you can multiply it by 0.4536 to convert it into kilograms. Once you have successfully converted the weight into kilograms, you can proceed with using the following formula to calculate the length: Length = Weight / (Density * π * (Diameter/2)^2) It's important to ensure that the diameter is measured in meters. If the diameter is given in a different unit, it must be converted accordingly. Additionally, the symbol "π" represents the mathematical constant pi, which is approximately equal to 3.14159. By substituting the appropriate values into the formula, you will be able to accurately determine the length of the steel round bar. Remember to maintain consistent units throughout the calculation to yield precise results. Please bear in mind that this calculation assumes the round bar possesses a consistent diameter along its entire length. If the bar exhibits varying diameters or irregularities, the resulting length may be an approximation rather than an exact measurement.

Q: What is the diameter deviation of 12 mm galvanized round bar?: It is widely used in hardware, building, automobile, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, aerospace and other architectural decoration. The most extensive machining of general machine parts, general rod type steel parts, CD pole, bolt, nut.

Q: What are the advantages of using phosphorus-alloy steel round bars?: Phosphorus-alloy steel round bars possess several advantages: 1. Greater strength: These bars exhibit higher tensile strength in comparison to standard steel bars. This increased strength makes them ideal for applications necessitating a greater load-bearing capacity, such as the construction and automotive industries. 2. Heightened corrosion resistance: Phosphorus-alloy steel demonstrates superior resistance to corrosion when compared to regular steel. Consequently, it boasts improved durability and longevity, particularly in environments with high moisture content or exposure to chemicals. 3. Enhanced machinability: Phosphorus-alloy steel showcases excellent machinability, enabling it to be easily shaped, cut, and formed into various designs or structures. This characteristic makes it the favored choice for industries requiring precision shaping, such as manufacturing and engineering. 4. Diminished brittleness: Phosphorus-alloy steel manifests a lower degree of brittleness in contrast to other steel types. Therefore, it is less prone to breaking or fracturing under sudden impacts or stress, rendering it a safer option for applications where structural integrity is paramount. 5. Cost-effectiveness: Despite its enhanced properties, phosphorus-alloy steel round bars remain cost-effective when compared to other specialty alloys. This affordability renders them a more economical choice for industries seeking high-performance materials without exceeding their budget. 6. Improved weldability: Phosphorus-alloy steel round bars exhibit exceptional weldability, facilitating easy and secure welding connections. This attribute makes them suitable for applications necessitating strong and reliable welded joints, such as construction or fabrication projects. In conclusion, phosphorus-alloy steel round bars offer increased strength, heightened corrosion resistance, enhanced machinability, diminished brittleness, cost-effectiveness, and improved weldability. These advantages establish them as the favored choice for various industries that require high-performance materials.

Q: How do you check the quality of a steel round bar?: To check the quality of a steel round bar, several factors need to be considered. Firstly, it is important to assess the bar's dimensions. This involves measuring its diameter, length, and straightness. Any deviation from the specified dimensions could indicate a lower quality bar. Next, the surface condition of the steel round bar should be inspected. It should be free from any visible defects, such as cracks, pits, or surface irregularities. Additionally, the bar's surface should be smooth and devoid of any significant roughness or burrs. Furthermore, the chemical composition of the steel round bar must be examined. This can be determined through spectroscopic analysis or other testing methods. The composition should meet the required standards and specifications, as any deviations can affect the bar's strength and durability. Another crucial aspect to consider is the mechanical properties of the steel round bar. This involves testing its tensile strength, yield strength, and elongation. These tests can be conducted using specialized machines to ensure that the bar meets the necessary strength requirements. Additionally, the steel round bar can be subjected to non-destructive testing methods, such as ultrasonic testing or magnetic particle inspection. These techniques help identify any internal or surface defects that may impact the bar's quality. Furthermore, it is essential to verify the bar's compliance with industry standards and certifications. This includes checking if the steel round bar meets the specifications set by organizations such as ASTM International or ISO. Lastly, it is advisable to consult with reputable suppliers or manufacturers who have a proven track record in producing high-quality steel round bars. They can provide documentation, certifications, and test reports to validate the quality of their products. In summary, evaluating the dimensions, surface condition, chemical composition, mechanical properties, compliance with standards, and supplier's reputation are key steps to check the quality of a steel round bar. By thoroughly examining these factors, one can ensure the reliability and performance of the steel round bar for their intended applications.

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