C40 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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C	Si	Mn	S max	P max	B
0.37-0.44	0.17-0.37	0.35-0.90	0.035	0.035	0.0008-0.003

Yield strength(MPa)	Tensile strength(MPa)	Elongation(%)	Reduction of area(%)	AKV(J)	Hardness(HB)
335	570	219	45	47	217

Sizes detalis	diameter	10-310mm
Sizes detalis	length	3-12m(canbe customerized)
Sizes tolerance	length	+/-100mm(max)
Sizes tolerance	diameter	+/-2mm(max)
Sizes tolerance	Straightness	3mm/m(max)

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: The difference between round face and round bar steel on concrete: 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. Of which: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts, and more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.

Q: What is the difference between common wire and high-speed wire?: 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. Of which: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. Round bars larger than 25 millimeters are used mainly for making mechanical parts or for seamless steel tubes.

Q: What are the different types of steel round bars used in the defense industry?: There are several different types of steel round bars that are commonly used in the defense industry. These materials are specifically chosen for their strength, durability, and ability to withstand harsh conditions. Some of the most commonly used steel round bars in the defense industry include: 1. High-strength low-alloy (HSLA) steel round bars: These bars are known for their high strength-to-weight ratio, making them ideal for applications where weight reduction is important. HSLA steel round bars are often used in the construction of armored vehicles, tanks, and other military equipment. 2. Stainless steel round bars: Stainless steel is highly resistant to corrosion and rust, making it an excellent choice for defense applications where exposure to moisture or harsh environments is common. Stainless steel round bars are frequently used in the manufacturing of military aircraft, naval vessels, and firearms. 3. Carbon steel round bars: Carbon steel is a versatile and cost-effective material that is widely 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 combination of different metals, typically including chromium, molybdenum, and nickel, which enhances its mechanical properties. Alloy steel round bars are commonly utilized in the production of military-grade vehicles, artillery systems, and munitions. 5. Tool steel round bars: Tool steel is specifically designed to have exceptional hardness, wear resistance, and toughness. It is often used for manufacturing cutting tools, drills, and other equipment used in the defense industry. Each type of steel round bar has its own unique properties and advantages, allowing it to fulfill specific requirements in 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 bearings?: No, steel round bars cannot be used for making bearings. Bearings require materials with specific properties such as hardness, smoothness, and low friction, which are not typically found in steel round bars. Bearing materials like stainless steel, ceramics, or specialized alloys are used instead.

Q: What are the different types of steel round bar alloys used in the construction industry?: There are several different types of steel round bar alloys commonly used in the construction industry. Some of the most popular alloys include: 1. Carbon Steel: This is the most common type of steel alloy used in construction. It is known for its high strength and durability, making it suitable for a wide range of applications. 2. Stainless Steel: This alloy is highly resistant to corrosion and staining, making it ideal for construction projects where exposure to moisture or chemicals is a concern. It is often used in applications such as handrails, kitchen equipment, and structural components. 3. Alloy Steel: This type of steel contains additional alloying elements such as manganese, chromium, or nickel, which enhance its mechanical properties. Alloy steel round bars are known for their high tensile strength, toughness, and wear resistance, making them suitable for applications that require heavy-duty performance. 4. Tool Steel: As the name suggests, this alloy is specifically designed for making tools and machinery components. Tool steel round bars are known for their hardness, resistance to abrasion, and ability to retain their shape at high temperatures. They are commonly used in the construction industry for making cutting tools, dies, and molds. 5. Duplex Steel: This alloy combines the properties of both austenitic and ferritic stainless steels. Duplex steel round bars offer excellent corrosion resistance, high strength, and good weldability. They are often used in construction projects where a combination of strength and corrosion resistance is required, such as in marine or coastal environments. Overall, the choice of steel round bar alloy in the construction industry depends on the specific application and requirements of the project. Each alloy offers unique properties and advantages, allowing construction professionals to select the most suitable option for their needs.

Q: How are steel round bars used in the manufacturing of mining equipment?: Steel round bars are an essential component in the manufacturing of mining equipment due to their strength, durability, and versatility. These bars are used in various applications throughout the mining industry, ensuring the reliability and longevity of the equipment. One of the primary uses of steel round bars in mining equipment is for the construction of frames and structural components. The bars provide the necessary structural support, ensuring the overall stability and robustness of the equipment. Whether it is for excavators, drilling rigs, or conveyor systems, steel round bars play a crucial role in maintaining the integrity of the machinery. Moreover, steel round bars are commonly utilized in the manufacturing of mining tools and attachments. These bars can be machined and shaped into different forms, such as shafts, pins, and bolts, which are vital for various mining operations. For example, drill bits used for drilling into rock formations are often made with steel round bars due to their ability to withstand high-pressure conditions. In addition, steel round bars are essential for the fabrication of wear-resistant components in mining equipment. The harsh environments in mining, including abrasive materials and extreme temperatures, necessitate the use of durable materials. Steel round bars with specific alloys and heat treatments can be employed to create wear-resistant parts like cutting edges, teeth, and buckets for excavators, ensuring their longevity and performance. Furthermore, steel round bars are also utilized in the production of support structures and safety features in mining equipment. These bars can be used to create roll cages, protective frames, and guardrails, providing a safe working environment for operators and minimizing the risk of accidents. Overall, steel round bars are a vital component in the manufacturing of mining equipment, contributing to their strength, reliability, and performance. Their use in construction, tool fabrication, wear-resistant components, and safety features ensures the durability and efficiency of mining machinery, enabling the industry to operate effectively and safely.

Q: How are steel round bars tested for quality?: Steel round bars are tested for quality through various methods such as visual inspection, dimensional checks, surface defects detection, mechanical testing, and chemical analysis. These tests ensure that the steel bars meet the required standards for strength, durability, and composition, ensuring their suitability for specific applications.

Q: Can steel round bars be used in the manufacturing of bearings?: No, steel round bars are not typically used in the manufacturing of bearings. Bearings require materials that have specific characteristics such as high strength, hardness, and wear resistance. Steel round bars may not possess these properties in the required magnitude. Instead, bearings are typically made from high-quality steel alloys specifically designed for bearing applications, such as bearing steel or stainless steel. These materials undergo specialized heat treatment processes to achieve the desired properties necessary for bearing manufacturing, including high load-carrying capacity, low friction, and long-lasting durability.

Q: Can steel round bars be used in the oilfield equipment industry?: Yes, steel round bars can be used in the oilfield equipment industry. Steel round bars are commonly used in the oilfield industry due to their high strength, durability, and resistance to corrosion. They are used to manufacture various components and equipment such as drill collars, drill bits, valves, and pump shafts. The use of steel round bars ensures that the equipment can withstand the harsh conditions and extreme pressures encountered in oilfield operations. Additionally, steel round bars can be easily welded and machined to meet specific requirements, making them a versatile choice for the oilfield industry.

Q: What are the different types of steel round bar shapes?: There is a wide range of steel round bar shapes to choose from, each possessing its own distinctive characteristics and uses. Some commonly seen types include: 1. Round: This shape is the most commonly used and versatile for steel round bars. It takes on a cylindrical form and finds application in various industries like construction, manufacturing, and automotive. 2. Square: Square steel round bars feature four equal sides and are often employed when a robust and sturdy form is needed. They are frequently utilized in construction, architectural designs, and machinery. 3. Hexagonal: Hexagonal steel round bars boast six sides, setting them apart with their unique shape. They are often selected for applications requiring high strength and corrosion resistance, such as aerospace, defense, and oil and gas industries. 4. Flat: Flat steel round bars exhibit a rectangular cross-section with flat top and bottom surfaces. They are commonly used when a broad, level surface is desired, as in construction, machinery, and manufacturing sectors. 5. Half Round: Half-round steel round bars adopt a semicircular shape with a flat base. They are frequently employed for handrails, fencing, and decorative purposes. 6. D-shaped: D-shaped steel round bars possess a flat bottom surface and a curved top surface, resembling the letter "D". They are often favored when a sturdy yet lightweight structure is required, such as in automotive frames and chassis. These examples merely scratch the surface of the various steel round bar shapes available. The choice of shape hinges upon the specific requirements of the application, encompassing factors like strength, durability, corrosion resistance, and aesthetic appeal.

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