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:How do steel round bars perform under bending or flexing forces?: Steel round bars exhibit excellent performance when subjected to bending or flexing forces due to their exceptional tensile strength and ductility. Their ability to resist deformation and retain their shape makes them highly suitable for various applications in construction, manufacturing, and engineering. Moreover, the combination of high strength and ductility enables these bars to evenly distribute and absorb applied loads, thereby minimizing the risk of failure or breakage. To further enhance the behavior of steel round bars under bending or flexing forces, several factors come into play, including alloy composition, heat treatment, and manufacturing processes. Different grades of steel offer varying levels of strength, toughness, and bending resistance. Additionally, heat treatment techniques such as quenching and tempering can significantly enhance the bars' mechanical properties, rendering them more resistant to bending and flexing. Nevertheless, it is crucial to acknowledge that excessive bending or flexing can result in permanent deformation or failure of steel round bars. Overloading or repeatedly subjecting the material to bending beyond its limits can lead to stress concentrations, microcracks, or even fractures. Consequently, it is of utmost importance to establish appropriate bending limits and ensure proper design and installation to uphold the structural integrity and safety of steel round bars when exposed to bending or flexing forces.

Q:What are the different surface treatments available for carbon steel round bars?: Carbon steel round bars have various surface treatments available, each serving a specific purpose and offering unique advantages. Some of the most commonly used treatments include: 1. Galvanizing: A layer of zinc is applied to the surface of the carbon steel round bar. This treatment provides exceptional corrosion resistance and significantly prolongs the steel's lifespan. 2. Black oxide coating: Also called blackening, this treatment creates a uniform, dark finish on the surface of the carbon steel round bar. Black oxide coatings offer mild corrosion resistance, improved lubricity, and a decorative appearance. 3. Chromium plating: By depositing a layer of chromium onto the carbon steel round bar's surface, typically through electroplating, this treatment enhances corrosion resistance, wear resistance, and provides a polished appearance. 4. Nitriding: Nitriding is a heat treatment process that diffuses nitrogen into the surface of the carbon steel round bar, resulting in a hard and wear-resistant layer. This treatment improves the steel's hardness and fatigue strength, making it suitable for applications requiring enhanced durability. 5. Phosphating: Phosphating is a chemical treatment that converts the surface of the carbon steel round bar into a layer of phosphate crystals. This treatment offers excellent corrosion resistance and enhances the adhesion of applied coatings or paints. 6. Powder coating: This treatment involves applying a dry powder to the surface of the carbon steel round bar, which is then cured under heat to form a protective coating. Powder coatings provide exceptional corrosion resistance, durability, and can be customized in various colors and finishes. These examples represent only a few of the available surface treatments for carbon steel round bars. The choice of treatment depends on the specific requirements of the application, such as corrosion resistance, wear resistance, aesthetics, and cost-effectiveness.

Q:How do you determine the strength of a steel round bar?: Various methods can be used to determine the strength of a steel round bar, including physical testing and material specifications. One commonly used method involves conducting a tensile test, where the bar is pulled until it breaks. This test helps determine the ultimate tensile strength (UTS) of the steel, which is the maximum stress it can handle before fracturing. The UTS is typically measured in units of force per cross-sectional area, such as pounds per square inch (psi) or megapascals (MPa). Another important strength property to consider is the yield strength. This is the stress level at which the steel starts to permanently deform, without any increase in load. The yield strength is crucial in assessing the structural integrity of the bar, as it indicates the maximum load it can bear without undergoing plastic deformation. In addition to physical testing, the strength of a steel round bar can also be determined by examining its material specifications. Steel manufacturers provide information about the composition and mechanical properties of their products. This includes details about the steel grade, which indicates the alloying elements present in the steel and their concentrations. Different steel grades have varying strength properties, which can help assess the strength of the round bar. It is important to consider that factors like heat treatment or surface conditions can also influence the strength of a steel round bar. Heat treatment processes, such as quenching and tempering, can enhance the strength and hardness of the steel. Additionally, surface conditions like coatings or treatments can improve corrosion resistance. To accurately determine the strength of a steel round bar, it is recommended to consult the material specifications provided by the manufacturer and, if necessary, conduct physical tests like tensile testing.

Q:Can steel round bars be used in the electronics industry?: Steel round bars can be used in the electronics industry, but their applications are generally limited. While steel is a strong and durable material, it is not typically utilized in electronic components or circuitry due to its electrical conductivity properties. In the electronics industry, materials with high electrical conductivity, such as copper or aluminum, are usually preferred. These materials allow for efficient transmission of electrical signals and minimize losses. However, steel round bars can find some applications in the electronics industry. They can be used for structural purposes, such as providing support or reinforcement to electronic equipment or enclosures. Steel bars can also be utilized in the manufacturing of various mechanical components, connectors, or fixtures used in electronics assembly. Additionally, steel round bars can be employed in the construction of equipment racks, shelves, or storage systems for electronic devices. Overall, while steel round bars may not be directly involved in the electrical aspects of the electronics industry, they can still serve important functions in terms of structural support and mechanical components.

Q:Can steel round bars be used in high-pressure applications?: Yes, steel round bars can be used in high-pressure applications. Steel round bars are known for their strength and durability, making them suitable for various industrial and mechanical applications. They have the ability to withstand high pressure and provide structural stability, making them a popular choice in industries such as oil and gas, construction, and manufacturing. However, it is important to choose the right grade and quality of steel round bars to ensure they can withstand the specific pressure requirements of the application.

Q:What are the advantages of using nickel-silicon alloy steel round bars?: Nickel-silicon alloy steel round bars offer numerous benefits. Firstly, they possess outstanding strength at high temperatures and are resistant to oxidation and corrosion. Consequently, they are well-suited for applications in extreme environments, such as the aerospace and automotive industries. Secondly, these round bars exhibit superior mechanical properties, including high tensile and yield strength. As a result, they are ideal for use in structural components that require durability and strength, like construction and engineering projects. Additionally, nickel-silicon alloy steel round bars demonstrate excellent resistance to fatigue and wear. Therefore, they are perfect for applications involving repetitive stress or abrasive conditions. This ensures extended lifespan and reduced maintenance requirements for components made from this material. Furthermore, nickel-silicon alloy steel is renowned for its exceptional magnetic properties, making it suitable for electromagnetic applications such as transformers, motors, and generators. Lastly, nickel-silicon alloy steel round bars can be easily machined and fabricated, allowing for greater design flexibility and ease of manufacturing. Consequently, they are a cost-effective choice for various industries, as they lower production costs and lead times. In summary, the advantages of nickel-silicon alloy steel round bars include resistance to high temperatures, excellent mechanical properties, fatigue and wear resistance, superior magnetic properties, and ease of machining and fabrication.

Q:What are the advantages of using cobalt-alloy steel round bars?: Using cobalt-alloy steel round bars in various industries and applications offers several advantages. Firstly, this type of steel is exceptionally strong and hard, providing resistance against wear, corrosion, and high temperatures. This makes it suitable for demanding environments where other materials would quickly degrade. Secondly, cobalt-alloy steel maintains its shape and size even under extreme conditions, demonstrating excellent dimensional stability. This makes it ideal for applications that require precise tolerances and minimal deformation, such as in the aerospace and automotive industries. Moreover, cobalt-alloy steel retains its mechanical properties at elevated temperatures, showcasing excellent heat resistance. This makes it valuable in applications involving high-speed machining, cutting tools, and turbine components. Additionally, cobalt-alloy steel round bars are easily machined and fabricated, offering versatility and customization in various applications. Their high machinability and weldability make them suitable for use in manufacturing processes like forging, casting, and machining. Furthermore, cobalt-alloy steel round bars exhibit excellent fatigue resistance, ensuring long-lasting performance and durability. This makes them suitable for applications involving repetitive stress or cyclic loading, such as shafts, springs, and fasteners. Lastly, cobalt-alloy steel is biocompatible, making it suitable for medical and dental applications. Its corrosion resistance and biocompatibility properties make it commonly used in orthopedic implants, surgical tools, and dental instruments. In conclusion, the advantages of using cobalt-alloy steel round bars include exceptional strength, hardness, and dimensional stability, as well as heat resistance, machinability, fatigue resistance, and biocompatibility. These qualities make them valuable across a wide range of industries and applications, offering reliability, durability, and performance.

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, these bars offer excellent corrosion resistance, making them ideal for applications in marine environments or industries where exposure to harsh chemicals is common. Secondly, nickel-copper alloy steel round bars possess high strength and durability, ensuring their ability to withstand heavy loads and extreme conditions. Additionally, these bars exhibit excellent heat resistance, making them suitable for high-temperature applications such as in the aerospace or automotive industries. Finally, the nickel-copper alloy steel round bars have good weldability and machinability, allowing for easy fabrication and customization. Overall, these advantages make nickel-copper alloy steel round bars a reliable and versatile choice for various industrial applications.

Q:Can steel round bars be used for making suspension springs?: Yes, steel round bars can be used for making suspension springs. Steel is a common material choice for suspension springs due to its strength, durability, and ability to withstand high loads and vibrations. Steel round bars can be readily shaped, tempered, and heat-treated to meet the specific requirements of suspension springs, providing necessary flexibility and resilience.

Q:What are the differences between hot rolled stainless steel rounds and cold drawn round ones?: 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. Where: 5.5-25 mm small round steel mostly straight bundles of supply, used for steel, bolts and various mechanical parts; greater than 25 mm round steel, seamless steel pipe is mainly used for the manufacture of mechanical parts of the tube, etc..

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