SAE 52100 Bearing Steel Round Bars SUJ2 System 1

SAE 52100 Bearing Steel Round Bars SUJ2 System 2

SAE 52100 Bearing Steel Round Bars SUJ2 System 3

SAE 52100 Bearing Steel Round Bars SUJ2 System 4

SAE 52100 Bearing Steel Round Bars SUJ2

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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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DIN	AISI	JIS
1.2067	L1/L3	SUJ2

C	Si	Mn	Cr	P	S	Mo	Ni
0.95-1.10	0.15-0.35	0.25-0.40	1.40-1.70	≤0.03	≤0.03	---	---

Round steel bar 60-800mm
Flat steel bar 25-400mm*200-800mm

Black surface/ Grinded/ Machined

HB225MAX

Flat Steel GCr15 Flats are of Good hardening ability. Good wear resistance. Shadow depth of hardness

Flat Steel GCr15 Flats are for making gauges and measuring tools, mandrels, cold rolls and flanging rolls, wood and paper processing tools, slitting blades, ball bearings and shear knives

Hardening Harden from a temperature of 790-820oC, 820-860oC followed by water or oil quenching. Hardness after quenching is 63-67, 63-66 HRC. Tempering Tempering temperature: 150-300oC. Hardness after tempering is 56-65 HRC.

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 bicycle frame applications?: Yes, steel round bars are suitable for bicycle frame applications. Steel is a commonly used material for bicycle frames due to its strength, durability, and ability to absorb vibrations. Round bars provide a strong and rigid structure, allowing for a stable and reliable frame that can withstand the stresses and strains of regular use.

Q:What are the advantages of using manganese-alloy steel round bars?: Manganese-alloy steel round bars offer several advantages. Firstly, they possess excellent strength and durability, making them ideal for applications that require high load-bearing capacity. Secondly, the presence of manganese in the alloy enhances hardenability, resulting in improved wear resistance and toughness. This makes manganese-alloy steel round bars suitable for use in environments with abrasive conditions or high impact forces. Additionally, these round bars exhibit good machinability, allowing for easy fabrication and shaping. Lastly, the corrosion resistance of manganese-alloy steel ensures a longer lifespan, reducing maintenance requirements and costs in various industries.

Q:Can steel round bars be used for making conveyor belts or rollers?: Certainly, conveyor belts or rollers can be made using steel round bars. Steel possesses remarkable tensile strength and durability, rendering it appropriate for tasks involving heavy loads or incessant motion. The round bars can be utilized to establish the conveyor belt or roller's structural framework or support system, ensuring stability and rigidity. Furthermore, steel exhibits resistance to wear and tear, as well as the capability to endure high temperatures, thereby making it perfect for industrial environments. Nevertheless, it is crucial to take into account other aspects such as the conveyor system's specific requirements, the type of material being transported, and any potential corrosion concerns that might arise.

Q:What are the different surface defects that can be found in steel round bars?: Some common surface defects that can be found in steel round bars include scratches, pits, cracks, scale, and decarburization.

Q:What are the standard sizes of steel round bars?: The standard sizes of steel round bars vary depending on the country and the specific industry standards. In general, steel round bars are available in a wide range of diameters, typically ranging from 6mm (0.24 inches) to 400mm (15.75 inches) or even larger. Commonly used sizes for commercial applications include 10mm (0.39 inches), 12mm (0.47 inches), 16mm (0.63 inches), 20mm (0.79 inches), 25mm (0.98 inches), and 32mm (1.26 inches). However, it is important to note that these sizes may differ in different regions and industries, and specialized applications may require unique dimensions. It is always recommended to consult the relevant industry standards or consult with suppliers to determine the specific standard sizes for steel round bars in a particular context.

Q:What are the advantages of using duplex steel round bars?: There are several advantages of using duplex steel round bars in various applications. Firstly, duplex steel round bars offer excellent corrosion resistance. This type of steel contains a balanced combination of chromium, nickel, and molybdenum, which enables it to withstand harsh environments, including marine and chemical industries. This corrosion resistance makes duplex steel round bars ideal for applications where exposure to corrosive elements is high. Secondly, duplex steel round bars possess high strength and toughness. The duplex microstructure of this steel combines both ferrite and austenite phases, resulting in a material with higher strength compared to traditional stainless steels. This enhanced strength and toughness make duplex steel round bars suitable for demanding applications that require high load-bearing capacities. Additionally, duplex steel round bars exhibit good fatigue resistance. This property makes them suitable for applications subjected to cyclic loading or dynamic stress, such as in structural components or machinery parts. The fatigue resistance of duplex steel allows for extended service life and reliability in such applications. Another advantage of using duplex steel round bars is their superior weldability. They offer good weldability due to their balanced chemical composition and microstructure. This makes it easier to fabricate and join duplex steel round bars, reducing production time and costs in various industries. Furthermore, duplex steel round bars have excellent resistance to stress corrosion cracking (SCC). SCC occurs when a material is exposed to a corrosive environment combined with tensile stresses, leading to premature failure. The ability of duplex steel to resist SCC makes it a preferred choice for applications where the risk of stress corrosion cracking is high, such as in offshore and oil and gas industries. Lastly, duplex steel round bars offer cost-effective solutions. Despite their superior properties, duplex steel round bars are often more cost-effective than other high-performance materials. Their long service life, reduced maintenance requirements, and overall durability contribute to lower lifecycle costs, making them an economical choice for various applications. In summary, the advantages of using duplex steel round bars include excellent corrosion resistance, high strength and toughness, good fatigue resistance, superior weldability, resistance to stress corrosion cracking, and cost-effectiveness. These properties make duplex steel round bars a preferred choice for a wide range of industries, including oil and gas, chemical processing, marine, and structural applications.

Q:What are the different types of steel round bar surface finishes used in the construction industry?: Steel round bars are widely used in the construction industry due to their strength and durability. To meet specific requirements and enhance performance, these bars undergo various surface finishes. Some common surface finishes used in construction include: 1. Hot Rolled Finish: The most commonly used finish involves heating the steel bar above its recrystallization temperature and rolling it through rollers. This process creates a rough and scale-covered surface. 2. Cold Drawn Finish: This process involves drawing the steel bar through dies to reduce its diameter and increase its length. Cold drawing produces a smooth and shiny surface, ideal for applications where aesthetics and precision are important. 3. Peeled and Polished Finish: This finish includes removing the outer layer of the steel bar through peeling and polishing it to achieve a smooth and mirror-like surface. It is often used in applications that require high visual appeal, such as architectural structures or decorative elements. 4. Ground Finish: Grinding is used to achieve a smooth and uniform surface finish on steel round bars. The process removes imperfections and unevenness, resulting in a precise and polished surface. Ground finishes are commonly used in applications that require tight tolerances, such as machinery or automotive components. 5. Coated Finish: Steel round bars can be coated with various materials, such as galvanized, epoxy, or powder coatings, to enhance corrosion resistance and provide additional properties. These coatings not only protect the steel from environmental factors but also improve its aesthetic appeal. Each surface finish offers unique advantages and is chosen based on specific project requirements. Whether it's for aesthetics, corrosion resistance, or tolerances, selecting the right surface finish is crucial to ensure optimal performance of steel round bars in their intended applications.

Q:Can steel round bars be used in the telecommunications industry?: Yes, steel round bars can be used in the telecommunications industry. They are often used for constructing infrastructure such as transmission towers and poles, as well as for cable management and support systems. The high strength and durability of steel make it suitable for withstanding the environmental conditions and load requirements in the telecommunications sector.

Q:What are the different types of surface defects in steel round bars?: Steel round bars can have different types of surface defects, which can vary in severity and affect the quality and performance of the bars. Common surface defects include: 1. Scale: During manufacturing, an oxide layer called scale can form on the surface of the steel. Scale appears as a rough, flaky layer and negatively affects the bar's appearance and surface finish. 2. Pits: Small depressions or cavities can occur on the bar's surface due to corrosion, mechanical damage, or manufacturing defects. Pits weaken the bar's structural integrity and increase the risk of failure. 3. Scratches: Shallow grooves or marks can be caused by handling, transportation, or contact with other objects during manufacturing. While scratches may not significantly impact the bar's strength, they do affect its appearance and surface finish. 4. Cracks: Linear fractures on the bar's surface can result from excessive stress, thermal cycling, or manufacturing defects. Cracks are extremely harmful to the bar's strength and integrity and can lead to catastrophic failure if not addressed. 5. Decarburization: Loss of carbon from the steel bar's surface layer, which can occur during heating or cooling processes. This process results in a softer and weaker surface layer, reducing the bar's overall strength and durability. 6. Lamination: Separation or delamination of layers within the steel bar, caused by improper bonding or rolling conditions during manufacturing. Lamination weakens the bar's structural integrity and increases the likelihood of failure. 7. Inclusions: Non-metallic particles or impurities present on the bar's surface, caused by contaminants in raw materials or improper manufacturing processes. Inclusions negatively impact the bar's mechanical properties and performance. To ensure the quality and performance of steel round bars, it is crucial to identify and address these surface defects. Various inspection and testing methods can be used, such as visual inspection, ultrasonic testing, magnetic particle inspection, and dye penetrant inspection.

Q:Are steel round bars suitable for the production of fasteners?: Fasteners can be produced using steel round bars, which are a suitable choice. Steel is known for its strength and durability, enabling it to withstand high levels of tension and pressure. This makes it an ideal option for fasteners. Round bars, specifically, offer a smooth and even surface that can be easily machined and shaped into various types of fasteners like bolts, screws, and studs. The versatility of steel round bars allows for customization in terms of size, length, and surface finish. As a result, they are suitable for a wide range of fastening applications in industries such as construction, automotive, and manufacturing. Moreover, steel round bars exhibit excellent corrosion resistance properties when coated with protective finishes. This ensures that the fasteners have a long lifespan and can be relied upon.

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