20MnCr5 Alloy Steel Round Bars SAE 5152 System 1

20MnCr5 Alloy Steel Round Bars SAE 5152 System 2

20MnCr5 Alloy Steel Round Bars SAE 5152 System 3

20MnCr5 Alloy Steel Round Bars SAE 5152 System 4

20MnCr5 Alloy Steel Round Bars SAE 5152

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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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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.17-0.22 %	Tensile strength(MPA)	≥1482
Si	≤0.25 %	Yield strength (MPA)	≥1232
Mn	1.10-1.50 %	Elongation (δ5/%)	≥13
Cr	1.00-1.30 %	Reduction in Area (ψ/%)	≥57
Ni	≤0.30 %	Impact toughness value αkv (J/cm2)	≥73
P	≤0.035 %	Hardness	≤357HB
S	≤0.035 %

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:Can steel round bars be used in the oil and gas industry?: Yes, steel round bars can be used in the oil and gas industry. Steel round bars are commonly used in various applications within the industry, including drilling, production, and transportation of oil and gas. These bars are highly durable and offer high strength, making them suitable for withstanding the harsh and demanding conditions that are typically found in the oil and gas sector. They are used in the construction of drilling equipment, such as drill collars and drill pipes, as well as in the production of valves, pumps, and other critical components. Additionally, steel round bars are used in the fabrication of pipelines and offshore platforms, where they provide structural support and ensure the integrity of the infrastructure. Overall, steel round bars are essential materials in the oil and gas industry due to their strength, reliability, and ability to withstand the challenging environments encountered in this sector.

Q:Can steel round bars be used for making shock absorber components?: Absolutely! When it comes to constructing shock absorber components, steel round bars are a fantastic choice. The reason being, steel possesses exceptional qualities including robustness, longevity, and the ability to withstand wear and tear. By utilizing steel round bars, it becomes possible to craft a multitude of shock absorber elements, including piston rods, mounting brackets, and tube bodies, through either machining or forging methods. The incorporation of steel guarantees that these components can endure the immense pressures and forces linked to shock absorption, thereby ensuring vehicle stability and seamless functionality.

Q:How are steel round bars used in the manufacturing of valves and fittings?: Steel round bars are used in the manufacturing of valves and fittings as they provide the necessary strength and durability required for these components. The round bars are first machined and shaped into various parts of the valve or fitting, such as the body, stem, or disc. The steel round bars are then further processed through cutting, drilling, and threading to create the desired shape and size. This ensures that the valves and fittings can withstand high pressure, temperature, and corrosive environments, making them suitable for industrial applications.

Q:Can steel round bars be used for making valves or fittings?: Yes, steel round bars can be used for making valves or fittings. Steel is a common material choice for valves and fittings due to its strength, durability, and resistance to corrosion. Steel round bars can be machined or forged into the desired shape for valves or fittings, ensuring that they meet the necessary specifications and requirements. Additionally, steel round bars can be heat-treated to enhance their mechanical properties and make them suitable for high-pressure or high-temperature applications. Overall, steel round bars are a versatile and reliable material option for manufacturing valves or fittings.

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 types of steel round bar surface finishes for corrosion resistance?: Corrosion resistance in steel round bars can be achieved through various surface finishes. These finishes effectively shield the bar from corrosive elements, reducing the risk of rust or degradation over time. Hot-dip galvanizing is a popular choice for corrosion resistance. It entails immersing the steel round bar in molten zinc, which creates a protective zinc coating. This sacrificial anode corrodes before the steel, providing long-lasting protection against rust and corrosion. Stainless steel is another common surface finish for corrosion resistance. With a minimum chromium content of 10.5%, it forms a passive oxide layer when exposed to oxygen. This layer acts as a barrier, preventing further oxidation and corrosion, making stainless steel round bars highly resistant to rust. Electroplating is a method used to provide corrosion resistance. By immersing the bar in an electrolyte solution and passing an electric current through it, a layer of metal like zinc or nickel is deposited onto the surface, offering a protective coating. For steel round bars that require both corrosion resistance and aesthetic appeal, powder coating is a popular choice. This process involves applying a dry powder coating to the surface and curing it under heat. The resulting hard, durable finish not only offers excellent corrosion resistance but also provides a variety of color options. There are also specialized coatings available for specific applications, such as epoxy or polymer coatings. These coatings offer superior resistance to particular corrosive environments, like exposure to chemicals or high humidity. In conclusion, there are several types of surface finishes for corrosion resistance in steel round bars. These include hot-dip galvanizing, stainless steel, electroplating, powder coating, and specialized coatings. The choice of finish depends on factors such as the specific application, environmental conditions, and desired aesthetics.

Q:What are the different types of defects that can occur in steel round bars?: Steel round bars can experience a range of defects that differ in severity and impact on overall quality and performance. Common types of defects include surface defects, internal defects, dimensional defects, decarburization, lamination, and incomplete heat treatment. Surface defects, such as scratches, pits, and scaling, are visible on the external surface of the bar. While these defects may not compromise the bar's structural integrity, they can affect its aesthetic appeal and potentially lead to corrosion if not addressed properly. Internal defects, like voids, inclusions, and segregation, occur within the body of the bar. These defects can weaken the bar's mechanical properties, jeopardize its structural integrity, and even cause cracking or failure under stress. Dimensional defects refer to variations in the size or shape of the bar, such as differences in diameter, length, or straightness. These defects can occur during manufacturing and can impact the bar's functionality and compatibility with other components. Decarburization is a defect that arises when the surface layer of the bar loses carbon due to exposure to high temperatures during manufacturing or heat treatment. This defect weakens the bar's hardness and strength, making it more susceptible to wear, fatigue, or failure. Lamination defects occur when there are layers or separations within the bar, often resulting from inadequate rolling or processing techniques. These defects reduce the bar's strength and ductility, making it prone to fracture or failure. Incomplete heat treatment can occur if the process is not performed correctly or if there are inconsistencies in cooling or reheating. This can lead to variations in hardness, strength, or toughness along the length of the bar. Manufacturers and quality control teams employ various testing and inspection methods to detect and mitigate these defects, ensuring that the bars meet the necessary standards and specifications. It is crucial to consider the specific application and requirements of the steel round bar when assessing the severity and impact of these defects.

Q:What are the different specifications for steel round bars?: The different specifications for steel round bars typically include the diameter, length, and grade of the steel. Other specifications may include the tolerance levels for diameter and length, as well as any specific requirements for surface finish or heat treatment.

Q:What is the difference between a hot rolled and a turned steel round bar?: The main difference between a hot rolled and a turned steel round bar lies in the manufacturing process and the resulting characteristics of the finished product. A hot rolled steel round bar is produced by heating a billet or ingot of steel to a high temperature and then rolling it into the desired shape. This process allows for the steel to be formed and shaped easily, resulting in a bar with a rough surface and a slightly rounded or irregular shape. Hot rolling also helps to improve the overall strength and toughness of the steel, making it suitable for a wide range of applications. On the other hand, a turned steel round bar is produced by machining a hot rolled or cold drawn bar on a lathe. This process involves removing material from the surface of the bar using cutting tools, resulting in a smooth and precise finish. Turning also allows for greater dimensional accuracy and control over the final shape and size of the bar. In terms of surface finish and dimensional accuracy, a turned steel round bar generally offers a higher level of precision compared to a hot rolled bar. The turned bar has a smoother surface with fewer imperfections, making it ideal for applications where appearance and aesthetics are important. Additionally, the turned bar typically has tighter tolerances, ensuring consistent dimensions throughout its length. The choice between a hot rolled and a turned steel round bar depends on the specific requirements of the application. Hot rolled bars are commonly used in construction, manufacturing, and general engineering applications where strength and toughness are crucial. Turned bars, on the other hand, are often used in industries such as automotive, aerospace, and precision machining, where a high level of surface finish and dimensional accuracy is required. In summary, the difference between a hot rolled and a turned steel round bar lies in the manufacturing process and the resulting characteristics. Hot rolled bars offer strength and toughness, while turned bars provide a smoother surface finish and greater dimensional accuracy. The choice depends on the specific needs of the application.

Q:What are the typical tolerances for steel round bars?: The typical tolerances for steel round bars can vary depending on the specific grade and size of the bar. However, common industry standards typically specify tolerances in terms of diameter deviation, straightness, and length. For diameter, tolerances can range from +/- 0.005 to +/- 0.25 inches, again depending on the bar size. Straightness tolerances are often specified as a maximum deviation per foot or meter, such as 0.010 inches per foot. Length tolerances can range from +/- 0.125 to +/- 1 inch. It's important to consult the appropriate industry standards or supplier specifications for precise tolerances based on the specific requirements of the project or application.

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