Hot Rolled Alloy Carbon Structural Steel Bars

Hot Rolled Alloy Carbon Structural Steel Bars System 1

Hot Rolled Alloy Carbon Structural Steel Bars System 2

Hot Rolled Alloy Carbon Structural Steel Bars System 3

Hot Rolled Alloy Carbon Structural Steel Bars System 4

Hot Rolled Alloy Carbon Structural Steel 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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Product Name	Alloy Steel 1.2379
Standard	ASTM A689, JIS G4801, DIN 17221, GB/T 18254, ASTM A295, JIS G4805, etc.
Spring steel	65Mn, 1566, 60Si2Mn, 9260, etc.
Bearing steel	GCr15, SAE52100, GCr15SiMn, 100CrMnSi6-4, SJU2, etc.
Cold heading steel	ML25, ML35, etc.
Alloy structural steel	40CrNiMo, SAE4330, 42CrMo, 15Cr2Ni2, 40CrNi2Mo, 35CrMoV, 12Cr1MoV, ASTM4130, SCM420, 40CrV, etc.
Military steel	20Cr2Ni4A, 18Cr2Ni4WA, 23CrNiMo7-4-7, etc.
Heat resistant steel	5CrNiMoV, 4Cr10Si2Mo, etc.
Mold and tool steel	SKD62, Cr12, 31CrMoV9, H11, 4Cr5MoSiV1, SKD61, DIN1.2344, H13, 35CrMoV, Cr12Mo1V1, SKD11, X153CrMoV12, D2, O1, DIN1.2510, P20, DIN1.2311, 3Cr2Mo, 9CrWMn, 4Cr13, AISI420, DIN1.2083, Cr12MoV, DIN1.2601, P20+Ni, Cr8Mo2SiV, DC53, DIN1.2738, etc.
Gear steel	ASTM8620, SAE4340, SNCM430, 40CrNiMo, etc.
Size	Round bar: 15-1200mm Square bar: 80-800mm
Length	2-12m, as customers' requirement.
Melting process	EAF+LF+VD
Ultrasonic testing	SEP1921-84 C/C, D/D, E/E
Surface treatment	Black, grinded, peeled, polished are available
Delivery condition	Annealing, tempering, quenching + tempering
Technique	hot rolled, cold drawn, forged are available
Package	Standard seaworthy packing, as customers’ requirement
Delivery Time	30 days after receipt of the deposit, negotiable.

Grade	Size (mm)
Round rolled steel (Dia.)	Flat rolled steel	Round forged steel (Dia.)	Square forged steel	Bright bar (Dia.)
High-quality carbon structural steel	16-320	5-38 44-150	120-900	100-750	12-150
Alloy structural steel	16-320	5-38 44-150	120-900	100-750	12-150
Carbon tool steel	16-320	5-38 44-150	120-350	100-310	12-150
Alloy tool steel	30-90		100-900	100-750	12-150
High speed tool steel			80-120	80-110	12-150
Bearing steel	16-320	5-38 44-150	120-300	100-600	12-150
Spring steel	14-180	5-38 44-150	120-300	100-260	12-150
Stainless steel	16-250		120-750	120-600	12-150
High temperature alloy steel			55-200	80-200	12-150
Free-cutting steel	14-250		120-400		12-150
Gear steel	16-320	5-38 44-150	120-900		15-150

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: Are steel round bars suitable for machining?: Yes, steel round bars are suitable for machining. Steel round bars are commonly used in various machining processes due to their excellent machinability. They can be easily shaped, cut, drilled, and turned using different machining techniques such as milling, turning, drilling, and grinding. Steel round bars offer good dimensional stability, high strength, and excellent wear resistance, making them ideal for machining operations. Additionally, steel round bars are available in different grades and alloys, allowing for a wide range of machining applications in industries such as automotive, aerospace, construction, and manufacturing.

Q: How do you prevent warping of steel round bars during machining?: To prevent warping of steel round bars during machining, several precautions can be taken. First, it is important to use a proper cutting tool with sharp edges and the right cutting speed to minimize heat generation. Additionally, using lubricants and coolants during the machining process can help dissipate heat and reduce friction. It is also crucial to ensure that the workpiece is properly secured to minimize vibration and movement during machining. Finally, allowing sufficient time for the steel round bars to cool down gradually after machining can help prevent warping.

Q: How do I determine the load capacity of a steel round bar?: To ascertain the load capacity of a steel round bar, one must take into account a range of factors. The load capacity of said round bar is contingent upon its diameter, length, and the specific steel variant employed. The ensuing steps elucidate the process of determining the load capacity: 1. Ascertain the steel grade: Distinct steel grades exhibit distinct strength properties. A few examples of common steel grades are A36, A572, and 4140. To pinpoint the precise grade of the steel round bar at hand, reference the specifications or seek guidance from an engineer. 2. Calculate the cross-sectional area: Employ the formula A = πr² to compute the cross-sectional area of the round bar, with A representing the area and r representing the radius of said bar. Remember to convert the diameter to radius by dividing it by 2. 3. Determine the allowable stress: The allowable stress denotes the maximum stress that a material can endure prior to deformation or failure. This value can be gleaned from engineering handbooks or through consultation with an engineer. 4. Apply the load capacity formula: Compute the load capacity of the round bar using the formula Load Capacity = Allowable Stress × Cross-sectional Area. 5. Account for safety factors: In engineering applications, it is customary to incorporate safety factors to ensure the safety of the structure. The specific safety factors hinge upon the application in question and the desired level of reliability. To ascertain the ultimate load capacity, reference the appropriate safety factor for your project. It is crucial to acknowledge that calculating the load capacity of a steel round bar is a multifaceted procedure necessitating expertise in structural engineering. If any uncertainty arises or precise calculations are required, it is advisable to seek the guidance of a qualified engineer who can furnish detailed analysis predicated on the specific parameters of your project.

Q: How do you prevent steel round bars from rusting during transportation?: To prevent steel round bars from rusting during transportation, you can apply a protective coating such as oil or rust inhibitors on the surface of the bars. Additionally, storing them in a dry and moisture-free environment, using moisture-absorbing materials or desiccants, and covering them with waterproof wrapping can also help prevent rusting.

Q: How do you determine the straightness of a steel round bar?: To determine the straightness of a steel round bar, there are several methods that can be used. One common method is visual inspection, where the bar is carefully examined for any visible bends, twists, or deviations from a straight line. This can be done by placing the bar on a flat surface and checking for any gaps or unevenness between the surface and the bar. Another method is to use a straightedge or a precision ruler. By placing the straightedge or ruler 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 help identify even slight bends or curves. Measuring devices such as dial indicators or laser alignment tools can also be used to determine the straightness of a steel round bar. These devices provide more accurate measurements and can quantify the degree of straightness by providing numerical readings of any deviations from a straight line. It is important to note that the acceptable level of straightness may vary depending on the specific application or industry standards. In such cases, specific tolerances or guidelines may need to be followed to ensure that the steel round bar meets the required straightness criteria. Overall, determining the straightness of a steel round bar requires careful visual inspection and the use of appropriate measuring tools to ensure that it meets the necessary straightness standards for its intended use.

Q: How do you prevent rusting of steel round bars?: To prevent rusting of steel round bars, there are several effective measures that can be taken: 1. Apply a protective coating: One of the most common ways to prevent rusting is by applying a protective coating on the steel round bars. This can be done by using paint, varnish, or a specialized rust-preventive coating. The coating acts as a barrier between the steel surface and the surrounding environment, preventing moisture and oxygen from reaching the metal and causing rust. 2. Keep the steel dry: Moisture is a key factor that contributes to the corrosion of steel. Therefore, it is crucial to keep the steel round bars as dry as possible. This can be achieved by storing them in a dry environment or using dehumidifiers in areas where moisture levels are high. 3. Maintain proper ventilation: Adequate ventilation helps in preventing the accumulation of moisture around the steel round bars. Good air circulation allows any moisture that may be present to evaporate, reducing the risk of rust formation. 4. Implement a rust inhibitor: Rust inhibitors, also known as corrosion inhibitors, can be applied to the steel round bars to prevent rust formation. These inhibitors work by chemically reacting with the metal surface, forming a protective layer that inhibits the oxidation process. Rust inhibitors can be in the form of oils, waxes, or specialized compounds. 5. Store in a controlled environment: If the steel round bars are not immediately being used, it is essential to store them in a controlled environment. This typically means keeping them in a dry, temperature-controlled area to minimize exposure to moisture and extreme temperatures, both of which can accelerate rust formation. 6. Regular maintenance and inspection: It is advisable to regularly inspect the steel round bars for signs of rust or damage. If any rust spots are detected, they should be promptly cleaned and treated with a rust remover or inhibitor to prevent further corrosion. By following these preventive measures, the rusting of steel round bars can be significantly reduced, ensuring their longevity and maintaining their structural integrity.

Q: What are the different types of steel round bar alloys used in the construction industry?: In the construction industry, various steel round bar alloys are commonly utilized. The following are some of the most favored alloys: 1. Carbon Steel: This type of steel alloy is extensively employed in construction due to its exceptional strength and durability, enabling it to be used in a wide array of applications. 2. Stainless Steel: With its remarkable resistance to corrosion and staining, stainless steel is an ideal choice for construction projects that involve exposure to moisture or chemicals. It finds applications in handrails, kitchen equipment, and structural components. 3. Alloy Steel: This steel variant contains additional alloying elements like manganese, chromium, or nickel, which augment its mechanical properties. Alloy steel round bars are renowned for their high tensile strength, toughness, and wear resistance, making them suitable for heavy-duty applications. 4. Tool Steel: Designed specifically for manufacturing tools and machinery components, tool steel round bars are recognized for their hardness, resistance to abrasion, and ability to retain their shape at high temperatures. They are commonly utilized in the construction industry for fabricating cutting tools, dies, and molds. 5. Duplex Steel: This alloy combines the qualities of both austenitic and ferritic stainless steels. Duplex steel round bars offer excellent corrosion resistance, high strength, and good weldability. They are frequently employed in construction projects that necessitate a combination of strength and corrosion resistance, such as in marine or coastal environments. In summary, the selection of a steel round bar alloy in the construction industry hinges on the specific application and project requirements. Each alloy boasts distinct properties and advantages, enabling construction professionals to choose the most suitable option for their needs.

Q: What kind of steel bars are used in general civil buildings?: In the general construction of commonly used hot rolled round bar (commonly known as round steel), hot rolled ribbed steel bars (commonly known as steel), the two most widely used steel. Identified as HPB235, the diameter of 6.5, 8, 10, 12, and then rough is not commonly used, and in the 6.5 and 8 most as commonly used, used as column, main reinforcement and stirrups and plate reinforced beam distribution.Steel is the HRB335, the diameter of 12 to 22, 25, 28, even 32, and then rough generally appear in the mass concrete construction, not commonly used, generally below 25 is commonly used in masonry structure in rural low level below 16 is most commonly used. Used as beams, columns, main bars and stand bars, etc.

Q: What are the applications of steel round bars?: Steel round bars have a wide range of applications across various industries due to their inherent strength, durability, and versatility. Some of the key applications of steel round bars include: 1. Construction: Steel round bars are extensively used in the construction industry for various structural purposes. They are commonly used for building columns, beams, and frames due to their high strength-to-weight ratio, which ensures stability and safety in construction projects. 2. Manufacturing: Steel round bars are widely used in the manufacturing sector for fabricating various components and machinery. They are commonly employed in the production of gears, shafts, axles, and other machine parts that require high strength and precision. 3. Automotive industry: Steel round bars find significant applications in the automotive industry. They are used in the manufacturing of crankshafts, connecting rods, suspension components, and many other parts, providing strength and reliability to vehicles. 4. Oil and gas industry: In the oil and gas sector, steel round bars are used for manufacturing drill bits, valves, pipes, and other equipment that are exposed to harsh environmental conditions and require high strength and corrosion resistance. 5. Aerospace industry: Steel round bars are essential in the aerospace industry due to their high strength and lightweight properties. They are used in the production of aircraft components, such as landing gear, engine parts, and structural components. 6. Shipbuilding: Steel round bars are commonly used in shipbuilding due to their excellent strength and corrosion resistance. They are used in the construction of ship frames, hulls, and other critical components that require durability and resistance to harsh marine environments. 7. Infrastructure projects: Steel round bars are extensively used in infrastructure projects, such as bridges, tunnels, and railways. They provide the necessary strength and stability required for supporting heavy loads and ensuring the structural integrity of these projects. 8. Furniture and interior design: Steel round bars are also used in the furniture and interior design industry. They are commonly employed in the construction of chairs, tables, shelves, and other furniture pieces due to their sleek appearance, durability, and easy formability. Overall, steel round bars have a wide range of applications in various industries, contributing to the development of robust and reliable structures, machinery, and equipment.

Q: Are steel round bars suitable for use in the marine industry?: Yes, steel round bars are suitable for use in the marine industry. Steel is known for its strength, durability, and corrosion resistance, making it an excellent choice for marine applications. Steel round bars are commonly used in shipbuilding, offshore structures, and other marine equipment due to their ability to withstand harsh weather conditions, saltwater exposure, and heavy loads. Additionally, steel's versatility allows for easy fabrication and customization to meet specific requirements in the marine industry.

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