aisi 4140 carbon alloy steel round bars System 1

aisi 4140 carbon alloy steel round bars System 2

aisi 4140 carbon alloy steel round bars System 3

aisi 4140 carbon alloy steel round bars System 4

aisi 4140 carbon alloy steel round bars

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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

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:Can steel round bars be used in the production of gears?: Yes, steel round bars can be used in the production of gears. Steel round bars are commonly used as raw material for manufacturing gears due to their high strength, durability, and excellent mechanical properties. They can be machined, heat treated, and shaped into the desired gear profiles, making them suitable for various applications in industries such as automotive, machinery, and manufacturing.

Q:What is the elongation of a steel round bar?: The elongation of a steel round bar refers to the amount of lengthening or stretching the bar undergoes when subjected to an applied force or load.

Q:What are the factors to consider when selecting a steel round bar for a specific application?: When choosing a steel round bar for a particular application, there are several key factors that need to be taken into account. Firstly, the material grade of the steel round bar is of utmost importance. Different grades of steel have different properties, such as strength, hardness, and resistance to corrosion. It is crucial to select a material grade that is suitable for the specific requirements of the application. Secondly, the mechanical properties of the steel round bar, such as tensile strength, yield strength, and elongation, need to be carefully evaluated. These properties determine how well the bar can withstand forces and deformations under load. It is important to choose a steel round bar with mechanical properties that are compatible with the demands of the application. The size and dimensions of the steel round bar also play a critical role. This includes considering the diameter, length, and tolerance requirements. The dimensions should be chosen based on the structural needs of the application and the desired load-bearing capacity of the bar. The surface finish of the steel round bar is significant, particularly in applications where aesthetics or contact with other components are important. Factors such as smoothness, roughness, and the presence of coatings or treatments should be taken into account. Depending on the environment in which the application will be used, it is crucial to select a steel round bar with adequate corrosion resistance. Factors such as exposure to moisture, chemicals, or extreme temperatures can impact the bar's performance and longevity. Options like stainless steel or corrosion-resistant coatings can be considered to enhance the bar's resistance to corrosion. If the steel round bar needs to be machined or fabricated into a specific shape, its machinability must be considered. Some steel grades are easier to machine than others and may require different tools or techniques. It is important to choose a bar with a machinability that aligns with the desired manufacturing processes. Lastly, the cost of the steel round bar should not be overlooked. Different material grades and specifications come with varying price points. It is important to strike a balance between the required properties and performance of the bar and the budget constraints of the project. In conclusion, selecting a steel round bar for a specific application necessitates careful consideration of the material grade, mechanical properties, size, surface finish, corrosion resistance, machinability, and cost. By taking these factors into account, one can ensure that the chosen steel round bar will meet the requirements of the application and deliver optimal performance.

Q:What are the different surface treatments for steel round bars?: There are several different surface treatments available for steel round bars, including galvanizing, chrome plating, powder coating, and nitriding. These treatments are applied to enhance the corrosion resistance, durability, and appearance of the steel bars.

Q:What are the different types of steel round bars used in the automotive suspension systems?: There are several different types of steel round bars used in automotive suspension systems, each offering unique properties and advantages. 1. Carbon steel round bars: These are the most commonly used type of steel round bars in automotive suspension systems. They offer good strength and durability, making them ideal for handling the weight and stress of the vehicle. Carbon steel round bars also have excellent machinability, allowing for easy fabrication and customization. 2. Alloy steel round bars: Alloy steel round bars are made by adding various alloying elements such as chromium, nickel, or molybdenum to carbon steel. This enhances their mechanical properties, including increased strength, hardness, and wear resistance. In automotive suspension systems, alloy steel round bars are often used in critical components such as control arms or sway bars. 3. Stainless steel round bars: Stainless steel round bars are known for their corrosion resistance and aesthetic appeal. While not as common in automotive suspension systems, they can be used in certain applications where resistance to rust or chemical exposure is necessary. Stainless steel round bars also offer good strength and high temperature resistance, making them suitable for specific suspension components. 4. High-strength steel round bars: As the name suggests, high-strength steel round bars are designed to provide exceptional strength and toughness. These bars are often used in demanding suspension applications, such as heavy-duty trucks or performance vehicles, which require increased load-bearing capacity and improved resistance to fatigue. 5. Forged steel round bars: Forged steel round bars are known for their exceptional strength and structural integrity. They are created by heating the steel to a high temperature and then shaping it under extreme pressure. This manufacturing process results in a dense and uniform structure, making forged steel round bars highly reliable and suitable for rigorous suspension systems. In summary, the different types of steel round bars used in automotive suspension systems include carbon steel, alloy steel, stainless steel, high-strength steel, and forged steel. Each type offers specific properties and advantages that cater to the unique requirements of suspension components in various vehicles.

Q:Can steel round bars be used for making tools or machinery parts?: Yes, steel round bars can be used for making tools or machinery parts. Steel round bars are known for their high strength, durability, and resistance to wear and tear. These properties make them ideal for applications in the manufacturing of tools and machinery parts that require high strength and reliability. Steel round bars can be machined, forged, or heat-treated to achieve the desired shape and properties required for specific tools or machinery parts. Additionally, steel round bars come in various grades, each with its own specific properties, allowing manufacturers to select the most suitable grade for their specific application. Overall, steel round bars are a versatile and commonly used material in the manufacturing industry for making tools and machinery parts.

Q:Can steel round bars be used in the production of medical equipment?: Medical equipment can indeed utilize steel round bars. This is because steel is a widely employed material in the production of medical devices and equipment. Its strength, durability, and versatility make it a popular choice. By utilizing steel round bars, one can fashion various components of medical equipment, including surgical instruments, orthopedic implants, diagnostic tools, and hospital furniture. Steel possesses desirable properties, such as resistance to corrosion and the ability to be sterilized, rendering it suitable for use in the medical sector where hygiene and patient safety are paramount. Furthermore, steel round bars can be easily machined and fabricated into different shapes and sizes, allowing for the customization of medical equipment to fulfill specific requirements.

Q:How do you determine the straightness of a steel round bar?: There are several methods available to determine the straightness of a steel round bar. One commonly used technique involves visually inspecting the bar for any visible bends, twists, or deviations from a straight line. This involves placing the bar on a flat surface and checking for gaps or unevenness between the bar and the surface. Another method involves utilizing a straightedge or precision ruler. By placing either of these tools along the length of the bar, any deviations from a straight line can be easily detected. This method allows for more precise measurements and can even identify slight bends or curves. Alternatively, measuring devices like dial indicators or laser alignment tools can be employed to assess the straightness of a steel round bar. These devices provide more accurate measurements and can quantify the degree of deviation from a straight line by providing numerical readings. It should be noted that the acceptable level of straightness may vary depending on the specific application or industry standards. In such cases, it may be necessary to adhere to specific tolerances or guidelines to ensure that the steel round bar meets the required straightness criteria. In conclusion, determining the straightness of a steel round bar necessitates careful visual inspection and the utilization of appropriate measuring tools to ensure that it satisfies the necessary straightness standards for its intended purpose.

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:What are the different types of steel round bar alloys for improved corrosion resistance?: There are several types of steel round bar alloys that are known for their improved corrosion resistance. Some of the commonly used alloys include stainless steel, weathering steel, and duplex stainless steel. 1. Stainless Steel: This alloy contains a minimum of 10.5% chromium, which forms a thin, protective layer of chromium oxide on the surface of the steel. This layer acts as a barrier against corrosion, making stainless steel highly resistant to rust and other forms of corrosion. Different grades of stainless steel, such as 304 and 316, offer varying levels of corrosion resistance depending on the specific application. 2. Weathering Steel: Also known as Corten steel, weathering steel develops a protective rust-like appearance when exposed to the weather. This self-healing characteristic makes it resistant to atmospheric corrosion. The addition of copper, chromium, and nickel in weathering steel enhances its corrosion resistance and enables it to withstand harsh environmental conditions without the need for painting. 3. Duplex Stainless Steel: Duplex stainless steel is a combination of austenitic and ferritic stainless steels. This alloy offers excellent corrosion resistance due to its high chromium and molybdenum content. Duplex stainless steel is particularly resistant to localized corrosion, such as pitting and crevice corrosion, making it suitable for applications in aggressive environments like marine and chemical industries. It is important to note that the choice of steel round bar alloy for improved corrosion resistance depends on the specific application requirements and environmental conditions. Consulting with a materials engineer or corrosion specialist can help determine the most suitable alloy for a particular application.

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