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.

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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

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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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For any problem, please kindly contact us at any your convenient time.

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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 manufacturing of shafts?: Yes, steel round bars can be used in the manufacturing of shafts. Steel round bars are often used as raw materials for shaft manufacturing due to their high strength, durability, and excellent mechanical properties. The round shape of the bar allows for easier machining and forming processes, making it suitable for creating shafts of various sizes and lengths. Additionally, steel round bars can be heat treated to enhance their hardness, strength, and wear resistance, further improving their suitability for shaft applications.

Q: Are steel round bars suitable for high-pressure applications?: Yes, steel round bars are often suitable for high-pressure applications. Steel is known for its strength and durability, making it an ideal material for withstanding high pressure. Round bars, in particular, offer excellent tensile strength and resistance to deformation, making them suitable for use in high-pressure environments such as hydraulic systems, oil and gas pipelines, and structural applications. Additionally, steel round bars can be manufactured to meet specific strength and hardness requirements, further enhancing their suitability for high-pressure applications. However, it is important to consider the specific requirements of the application and consult with an engineer or industry expert to ensure the appropriate grade and size of steel round bar is selected for optimal performance and safety.

Q: Are steel round bars available in custom lengths?: Yes, steel round bars are available in custom lengths.

Q: What are the different types of steel round bars used in the defense industry?: In the defense industry, various steel round bars are commonly employed due to their strength, durability, and ability to withstand harsh conditions. Some of the frequently utilized types are as follows: 1. High-strength low-alloy (HSLA) steel round bars: These bars possess a high strength-to-weight ratio, making them ideal for applications where weight reduction is crucial. They find extensive use in the construction of armored vehicles, tanks, and other military equipment. 2. Stainless steel round bars: Stainless steel exhibits remarkable resistance to corrosion and rust, making it an excellent choice for defense applications exposed to moisture or harsh environments. Its wide usage includes the manufacturing of military aircraft, naval vessels, and firearms. 3. Carbon steel round bars: Carbon steel is a versatile and cost-effective material extensively used in the defense industry. It offers excellent strength and hardness, making it suitable for various applications, such as missile components, gun barrels, and armor plates. 4. Alloy steel round bars: Alloy steel is a blend of different metals, typically including chromium, molybdenum, and nickel, which enhances its mechanical properties. It finds common application in the production of military-grade vehicles, artillery systems, and munitions. 5. Tool steel round bars: Tool steel is specifically designed to possess exceptional hardness, wear resistance, and toughness. It is often employed in the manufacturing of cutting tools, drills, and other equipment utilized in the defense industry. Each type of steel round bar possesses unique properties and advantages, enabling it to meet specific requirements within the defense sector. The selection of the appropriate steel round bar depends on the specific application and the desired performance characteristics needed to meet the demands of the defense industry.

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: What are the advantages of using high-strength steel round bars?: Using high-strength steel round bars in various applications brings several advantages. Firstly, these bars have an exceptional strength-to-weight ratio. Despite being lighter than other materials, they possess significantly higher strength. This advantage allows for the construction of sturdy and lightweight structures, making them ideal for weight reduction in industries like aerospace and automotive. Secondly, high-strength steel round bars offer excellent resistance to wear, fatigue, and impact. This makes them highly durable and able to withstand heavy loads and repeated stress, enhancing the lifespan and performance of structures or components. This is particularly beneficial in construction, where materials must maintain structural integrity over time. Furthermore, high-strength steel round bars provide improved design flexibility due to their versatility. They can be easily shaped, machined, and welded, allowing for the creation of complex and customized structures or components. This enables engineers and designers to optimize their designs and achieve specific performance requirements. In addition, high-strength steel round bars offer enhanced resistance to corrosion, making them suitable for applications in harsh environmental conditions. By utilizing these bars, structures or components can maintain their integrity and functionality for extended periods, reducing the need for frequent maintenance and replacement. Finally, using high-strength steel round bars can lead to long-term cost savings. Despite their higher initial cost, their superior strength and durability significantly reduce maintenance, repair, and replacement costs over time. Additionally, their lightweight nature contributes to fuel efficiency, resulting in cost savings in transportation and other industries. Overall, the advantages of using high-strength steel round bars include a high strength-to-weight ratio, excellent resistance to wear and fatigue, improved design flexibility, enhanced corrosion resistance, and potential cost savings. These benefits make them a preferred choice for a wide range of applications.

Q: What are the advantages of using spring steel round bars?: Some advantages of using spring steel round bars include their high tensile strength, excellent resilience, and durability. They are able to withstand heavy loads and provide reliable support in various applications. Additionally, spring steel round bars offer good flexibility and are resistant to bending or breaking, making them ideal for use in springs, tools, machinery, and automotive components.

Q: What are the different tolerances for steel round bars?: There are various tolerances for steel round bars, depending on the specific requirements and standards set by different industries and applications. These tolerances ensure that the dimensions and surface conditions of the steel round bars meet the desired specifications. The most common tolerance for steel round bars is the diameter tolerance. This refers to the allowable deviation from the specified diameter. For example, a steel round bar with a diameter tolerance of +/- 0.005 inches means that the actual diameter of the bar can vary within this range. Another important tolerance for steel round bars is the straightness tolerance. This refers to the allowable deviation from a straight line over a specified length of the bar. Straightness tolerances are usually given in terms of the maximum deviation in relation to the length, such as 0.010 inches per foot. Surface finish tolerance is also crucial for steel round bars. It refers to the acceptable variation in the surface texture or roughness of the bar. This tolerance is often specified using parameters such as Ra (average roughness) or Rz (maximum roughness depth). For example, a surface finish tolerance of Ra 0.8 micrometers means that the average roughness of the bar's surface should not exceed this value. In addition to these common tolerances, there may be other specific tolerances based on the intended application of the steel round bars. These can include tolerances for straightness, length, weight, or other dimensional properties. It is important to note that the tolerances for steel round bars can vary depending on the standards followed by different industries and countries. It is always recommended to refer to the relevant standards or specifications to determine the specific tolerances required for a particular application.

Q: What are the different grades of tool steel round bars?: Various grades of tool steel round bars are offered, each possessing unique properties and characteristics tailored to specific applications. Examples of these grades include: 1. W1: With its relatively low carbon content, W1 is a water-hardening tool steel renowned for its exceptional toughness and good wear resistance. It finds common usage in cutting tools and woodworking tools. 2. O1: O1 tool steel round bars are oil-hardening tool steel boasting high carbon content. They exhibit excellent wear resistance, high toughness, and exceptional dimensional stability. O1 tool steel is frequently employed for punches, dies, and cutting tools. 3. A2: A2 tool steel round bars are air-hardening tool steel with moderate carbon and chromium content. They offer good wear resistance, superior toughness, and high dimensional stability. A2 tool steel is a popular choice for blanking and forming dies, as well as shear blades. 4. D2: D2 tool steel round bars are characterized by their high carbon and chromium content, providing outstanding wear resistance and good toughness. They exhibit remarkable resistance to abrasive wear and are commonly utilized in the production of cutting tools, punches, and forming dies. 5. M2: High-speed M2 tool steel round bars are enriched with a notable amount of tungsten, molybdenum, and vanadium. They deliver exceptional wear resistance, high red hardness, and good toughness. M2 tool steel is typically employed for high-speed cutting tools, drill bits, and machining tools. 6. S7: S7 tool steel round bars are air-hardening shock-resistant tool steel. They possess high impact toughness, good wear resistance, and excellent heat resistance. S7 tool steel is frequently applied in applications necessitating high shock resistance, such as chisels and hammers. These are merely a few instances of the diverse grades of tool steel round bars available in the market. The choice of grade hinges on factors such as the specific application, desired hardness, wear resistance, toughness, and heat resistance required. It is crucial to seek guidance from a knowledgeable supplier or metallurgist to ascertain the most appropriate grade for a given application.

Q: How are steel round bars used in the construction of high-rise buildings?: Steel round bars are commonly used in the construction of high-rise buildings due to their strength, durability, and versatility. These bars are typically made of carbon steel, which has excellent mechanical properties and can withstand high loads and pressures. In the construction of high-rise buildings, steel round bars are primarily used in reinforced concrete structures. They are commonly used as reinforcement in concrete beams, columns, and slabs. The bars are embedded in the concrete to provide additional strength and stiffness to the overall structure. One of the main advantages of using steel round bars is their ability to resist tension forces. Concrete is strong in compression but weak in tension, so the steel bars act as tension reinforcement, preventing the concrete from cracking or failing under tension loads. This helps to enhance the structural integrity and overall safety of the building. Additionally, steel round bars can be easily bent, shaped, and welded, allowing for flexible design and construction possibilities. They can be customized to specific lengths and diameters to suit the requirements of the building project. This versatility makes them ideal for constructing various structural elements, such as beams and columns, which need to be precisely engineered to support the weight and stresses of a high-rise building. Moreover, steel round bars have excellent resistance to corrosion, which is crucial in the construction of high-rise buildings that are exposed to various environmental elements. The corrosion-resistant properties of steel ensure the long-term durability and lifespan of the structure. Overall, steel round bars play a vital role in the construction of high-rise buildings by providing strength, durability, and flexibility to the reinforced concrete structures. They enhance the overall structural integrity, safety, and longevity of the building, making them an essential component in modern construction practices.

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