ASTM A105 Carbon Steel Round Bars System 1

ASTM A105 Carbon Steel Round Bars System 2

ASTM A105 Carbon Steel Round Bars System 3

ASTM A105 Carbon Steel Round Bars System 4

ASTM A105 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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Item
Standard	GB/T 700-2006,GB/T 1591-94,JIS G3101-2004, ASTM A36/A36M-05,ASTM A242/A242M-04,ASTM A529/A529M-05, ASTM A572/A572M-06,EN 10025-2-2004
Material	Q195,Q215 A,Q215 B,Q235 A,Q235 B,Q235 C, Q235D,Q275,Q275B,Q275C,Q275D,Q295,Q345,Q390,Q420, Q460, SS330,SS400,SS490,SS540,A36,1,GR.36,50(245),55(380),42(290), 60(415),65(450),S185(1.0035),S235JO(1.0114), S235JR(1.0038), S235J2(0.0117),S275JR(1.0044),S275JO(1.10143),S355JO(1.0553), E295(1.0050),E335(1.0060), S235J2W(1.861),S355J2W(1.8965),10#, 15#20#
Diameter	4mm~800mm
Length	1m,3m,5.8m,6m,12m or as required
Surface	polished,bright,black,coated,2b,ba,mirror,NO.4,8K
Package	Standard export seaworthy or as customers’ requirements
Application	1.Mainly used in the manufacture of petroleum, chemical, gas separation and shipping container or other similar devices, such as all kinds of tower vessels, heat exchangers, torage tank and tank car, etc 2.Manufacture all kinds of stamping parts, construction and engineering structure and some of the less important machine structure and parts. 3. Buildings and Bridges,Vehicles, towers and other structures. 4.Used as a floor, workshop escalator, working pedal, ship deck and car plate and so on 5.Make fixed boiler, boiler and other important hull attachments. 6.Pressure vessels, welding gas cylinder steel plate 7.Production of cutting tools, measuring tool and die
Export	Ireland,Singapore,Indonesia,Ukraine,Saudi Arabia,Spain,Canada,USA,Brazil,Thailand,Iraq,Russia, Holland,Turkey,Kuwait,Korea,Iran,India,Egypt,Oman,Malaysia,Peru, Vietnam,Mexico,etc

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:What is the tensile strength of round steel bars of diameter 28?: Round steel is a solid strip of steel whose cross section is round. Its specifications are expressed in diameter, in units of millimeters (mm), such as "50mm", which means a diameter of 50 millimeters of round steel.

Q:How are steel round bars used in the mining industry?: The mining industry extensively utilizes steel round bars for various purposes. Underground support systems heavily rely on these bars, commonly employed as roof bolts or rock bolts, to prevent cave-ins or roof falls. In the manufacturing of drilling equipment, steel round bars are frequently transformed into drill rods or drill bits. This conversion allows them to endure the challenging conditions associated with mining operations. The bars are typically subjected to heat treatment to enhance hardness and resistance to wear, ensuring their durability during drilling processes. Within the mining field, steel round bars have another significant application in the production of grinding media for grinding mills. Termed grinding rods, these bars consist of high-quality steel and possess specific hardness and toughness. Their function is to effectively reduce ore particles into smaller sizes, facilitating the extraction of valuable minerals. Furthermore, steel round bars contribute to the construction of conveyor systems in mining operations. They are commonly employed as support bars or rollers in conveyor belts, ensuring the efficient transportation of mined materials from one location to another. To summarize, steel round bars hold a crucial position in the mining industry. Their diverse applications, ranging from providing support in underground mines to manufacturing drilling equipment and grinding media, contribute to the overall efficiency and productivity of mining operations.

Q:What are the different testing methods used for steel round bars?: Steel round bars undergo various testing methods to guarantee their quality and suitability for different applications. These methods encompass: 1. Visual Inspection: In this preliminary step, the bars are visually assessed for any discernible defects, such as cracks, surface irregularities, or incorrect dimensions. 2. Dimensional checks: To verify their diameter, length, and straightness, steel round bars are subject to dimensional scrutiny. Accurate measurements are imperative to meet specified requirements. 3. Ultrasonic Testing: Internal defects like cracks, voids, or inclusions are detected by passing ultrasonic waves through the round bars. This method identifies potential weaknesses that could compromise the bars' structural integrity. 4. Magnetic Particle Inspection: By utilizing a magnetic field and magnetic particles, this method identifies surface and near-surface defects like cracks, seams, or laps. It is especially advantageous for ferromagnetic materials like steel. 5. Dye Penetrant Inspection: This technique involves applying a colored dye to the round bars' surface and subsequently wiping it off. The dye seeps into any surface cracks or defects, making them visible under ultraviolet light. 6. Hardness Testing: To gauge the hardness of steel round bars, hardness testing is conducted using methods like Rockwell or Brinell scales. It assists in determining the material's ability to withstand external forces and ensures compliance with required hardness specifications. 7. Tensile Testing: This test measures the maximum load a steel round bar can bear before fracturing, providing insight into the material's strength and ductility. 8. Chemical Analysis: Chemical analysis is performed to ascertain the composition of the steel round bars, including the presence of elements like carbon, manganese, sulfur, phosphorus, and others. It guarantees adherence to the required chemical composition standards. These testing methods are vital in ensuring that steel round bars meet industry standards and customer requirements in terms of quality, reliability, and compliance. Employing a combination of these tests is essential to ensure overall quality and performance in various applications.

Q:Are steel round bars susceptible to cracking?: Yes, steel round bars can be susceptible to cracking under certain conditions. The specific factors that can contribute to cracking in steel round bars include high stress levels, improper heat treatment, and the presence of impurities or defects in the material. Additionally, sudden changes in temperature or excessive loading can also increase the likelihood of cracking. It is important to note that steel round bars can vary in their susceptibility to cracking depending on the specific grade and composition of the steel. Some types of steel, such as low carbon or mild steel, are generally less prone to cracking compared to higher carbon or alloy steels. To mitigate the risk of cracking, proper handling and storage of steel round bars is crucial. This includes avoiding dropping or mishandling the bars, as well as storing them in a dry and controlled environment to prevent corrosion. Furthermore, proper heat treatment processes, such as annealing or tempering, can help improve the structural integrity of steel round bars and reduce the risk of cracking. Additionally, regular inspections and testing for any potential defects or impurities can help identify and address any issues before they lead to cracking. Overall, while steel round bars can be susceptible to cracking, taking appropriate precautions and utilizing proper manufacturing and handling techniques can minimize the risk and ensure the integrity of the bars.

Q:Can steel round bars be used in the automotive manufacturing?: Yes, steel round bars can be used in automotive manufacturing. Steel round bars offer high strength and durability, making them suitable for various automotive components such as crankshafts, camshafts, axles, and suspension parts. They also provide excellent machinability and can be easily fabricated into the required shapes and sizes, making them a preferred choice in the automotive industry.

Q:Can steel round bars be used for making engine parts?: Yes, steel round bars can be used for making engine parts. Steel round bars are often used in the manufacturing of engine components due to their high strength, durability, and resistance to heat and corrosion. They can be machined into various shapes and sizes to create engine parts such as crankshafts, camshafts, connecting rods, and valves. The use of steel round bars ensures the required mechanical properties and structural integrity needed for engine performance and reliability. Additionally, steel round bars can be heat-treated and surface-treated to further enhance their properties, making them suitable for engine applications.

Q:What are the different surface finishes available for steel round bars?: Steel round bars can be finished in various ways, each with its unique properties and applications. Some commonly used surface finishes include: 1. Hot Rolled: By heating the steel above its recrystallization temperature and allowing it to cool, a rough and scaled surface is achieved. This finish is suitable for applications that prioritize functionality over aesthetics. 2. Cold Drawn: The steel round bar is pulled through a die at room temperature, resulting in a smooth and polished surface. This finish offers improved dimensional accuracy and tight tolerances, making it ideal for precise applications that require a visually appealing appearance. 3. Turned and Polished: Using a lathe machine, the steel round bar is turned to achieve a smooth and shiny surface. This process eliminates any imperfections and irregularities, providing a close tolerance and highly finished surface. Turned and polished bars are commonly used in applications that demand high surface finish and dimensional accuracy, such as shafts and precision components. 4. Ground: Grinding is employed to remove surface defects and irregularities, resulting in a highly accurate and smooth surface finish. This finish is suitable for applications that require close tolerances and a superior surface finish, such as bearings, gears, and high-precision components. 5. Coated: Steel round bars can be coated with materials like zinc, chrome, or nickel to enhance their performance and protect against corrosion. Coated bars offer improved durability, corrosion resistance, and aesthetic appeal. The choice of surface finish for steel round bars depends on specific application requirements, including dimensional accuracy, surface quality, corrosion resistance, and aesthetic appeal.

Q:How do you measure the diameter of a steel round bar?: In order to determine the diameter of a steel round bar, there are two tools that can be utilized: a caliper or a micrometer. First and foremost, it is crucial to ensure that the round bar is devoid of any dirt, debris, or rough edges. Place the round bar on a level and smooth surface. If a caliper is available, open it and place one jaw on one side of the round bar and the other jaw on the opposite side. It is important to guarantee that the jaws are perpendicular to the bar and in contact with its outer surface. Gradually close the caliper until both jaws are firmly pressed against the bar. The measurement can be read from the caliper's scale or digital display, providing the diameter of the round bar. Alternatively, if a micrometer is at hand, open it and adjust the thimble to zero. Position the anvil, which is the stationary part, against one side of the round bar, and the spindle, which is the moving part, against the opposite side. Rotate the thimble until the spindle makes firm contact with the bar. The measurement can be read from the thimble's scale or digital display, along with the corresponding number on the barrel. This will yield the diameter of the round bar. It is important to remember that in order to ensure accuracy, multiple measurements should be taken at various points along the bar, as the diameter may not be perfectly uniform throughout its length.

Q:What is the minimum yield strength of steel round bars?: The minimum yield strength of steel round bars can vary depending on the specific grade and type of steel being used. However, in general, most steel round bars have a minimum yield strength of 36,000 psi (pounds per square inch) or 250 megapascals (MPa). This minimum yield strength is typically required to ensure that the steel round bars have sufficient strength and durability to withstand applied loads and prevent deformation or failure. It is important to note that different applications may require steel round bars with higher yield strengths to meet specific performance requirements.

Q:What are the advantages of using nickel-copper alloy steel round bars?: There are several advantages of using nickel-copper alloy steel round bars. Firstly, nickel-copper alloy steel has excellent resistance to corrosion and oxidation. This makes it ideal for applications in harsh environments, such as marine or chemical industries, where the bars may come into contact with corrosive substances or saltwater. The high resistance to corrosion ensures the longevity and durability of the round bars, reducing the need for frequent replacements. Secondly, nickel-copper alloy steel round bars have excellent mechanical properties. The addition of nickel and copper to the alloy enhances its strength, toughness, and hardness. This makes the bars suitable for heavy-duty applications that require high strength and durability, such as in construction, manufacturing, and engineering. The superior mechanical properties of nickel-copper alloy steel round bars allow them to withstand heavy loads and resist deformation or breakage, contributing to the overall safety and reliability of the structures or components they are used in. Another advantage of using nickel-copper alloy steel round bars is their excellent thermal stability. The alloy has a low coefficient of thermal expansion, meaning it can withstand high temperatures without significant dimensional changes. This property is particularly important in applications that involve exposure to extreme heat, such as in the aerospace or power generation industries. The thermal stability of the round bars ensures their dimensional integrity, reducing the risk of warping or cracking under high-temperature conditions. Furthermore, nickel-copper alloy steel round bars offer good electrical conductivity. This property is beneficial in applications that require the transmission of electric current, such as in electrical wiring or power distribution systems. The high electrical conductivity of the alloy ensures efficient and reliable electrical connections, minimizing power loss and maximizing performance. In conclusion, the advantages of using nickel-copper alloy steel round bars include excellent corrosion resistance, superior mechanical properties, thermal stability, and good electrical conductivity. These characteristics make the bars suitable for a wide range of applications in various industries, providing durability, strength, and reliability.

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