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: What is the difference between hot rolled and cold drawn steel round bars?: Hot rolled steel round bars are produced by heating a steel billet or ingot at a high temperature and then rolling it into the desired shape. This process results in a rougher surface finish and a larger diameter tolerance compared to cold drawn steel round bars. Hot rolled bars are commonly used in applications where strength and durability are important, such as in construction and manufacturing. On the other hand, cold drawn steel round bars are produced by pulling a hot rolled bar through a die at room temperature, which results in a smoother surface finish and tighter diameter tolerances. This process also improves the mechanical properties of the steel, such as its strength and hardness. Cold drawn bars are often used in applications where precision and a high-quality surface finish are required, such as in the production of shafts, bolts, and precision components. In summary, the main differences between hot rolled and cold drawn steel round bars are the surface finish, diameter tolerance, and mechanical properties. Hot rolled bars have a rougher surface finish, larger diameter tolerances, and are typically used in applications where strength and durability are important. Cold drawn bars have a smoother surface finish, tighter diameter tolerances, and are commonly used in applications where precision and a high-quality surface finish are required.

Q: Can steel round bars be machined?: Yes, steel round bars can be machined. Machining processes such as turning, milling, drilling, and grinding can be used to shape and cut steel round bars according to specific requirements.

Q: How are steel round bars used in the construction of pipelines?: Steel round bars are commonly used in the construction of pipelines due to their high strength and durability. These bars are typically made from carbon or alloy steel and are available in various sizes and grades to suit the specific requirements of the pipeline. One of the key uses of steel round bars in pipeline construction is for reinforcement. They are often used as reinforcement in concrete foundations and supports along the pipeline route. The bars provide added strength and stability to the structure, ensuring that the pipeline remains secure and can withstand external forces such as soil movement or seismic activity. Additionally, steel round bars are also used as the main material for the fabrication of pipeline joints. These bars are typically bent or welded to form various shapes and sizes to connect different sections of the pipeline. The high tensile strength of steel ensures that the joints can withstand the pressure and stress exerted by the fluids being transported through the pipeline. Moreover, steel round bars are utilized in the construction of pipeline hangers and supports. These bars are often shaped and welded to form brackets or clamps that hold the pipeline in place. The bars provide a sturdy and reliable support system, preventing sagging or movement of the pipeline, and ensuring smooth and uninterrupted flow. In summary, steel round bars play a crucial role in the construction of pipelines. They are used for reinforcement, fabrication of pipeline joints, and the construction of hangers and supports. Their high strength, durability, and versatility make them an ideal choice for ensuring the structural integrity and reliability of pipelines.

Q: What is the difference between a hot-rolled and a peeled steel round bar?: A hot-rolled steel round bar is produced by heating a billet or ingot until it reaches a temperature where the material can be easily shaped or formed. Once heated, the steel is rolled through a series of rollers to achieve the desired shape and size. The process of hot rolling creates a bar with a rough surface texture and a slightly rounded edge. On the other hand, a peeled steel round bar undergoes a different manufacturing process. It is first hot-rolled to achieve the desired shape and size, similar to the hot-rolled bar. However, after the initial hot rolling, the peeled bar is subjected to a mechanical peeling process. This involves removing the outer layer of the bar to achieve a smooth, shiny surface finish. The peeling process also helps to improve the dimensional accuracy and surface quality of the bar. In summary, the main difference between a hot-rolled and a peeled steel round bar lies in the surface finish and dimensional accuracy. While a hot-rolled bar has a rough surface texture and a slightly rounded edge, a peeled bar has a smooth, shiny surface finish with improved dimensional accuracy. The peeling process enhances the overall quality and appearance of the steel round bar, making it more suitable for applications where aesthetics or precision is important.

Q: What are the different types of steel round bars used in the marine industry?: There are several types of steel round bars commonly used in the marine industry, including stainless steel round bars, carbon steel round bars, and alloy steel round bars. Stainless steel round bars are highly corrosion-resistant and are often used in applications where exposure to saltwater is common. Carbon steel round bars are strong and durable, making them suitable for various marine components and structures. Alloy steel round bars offer enhanced strength and toughness, making them ideal for demanding marine applications that require high performance and resistance to wear and tear.

Q: What are the different types of steel round bars used in the manufacturing of springs?: There are several different types of steel round bars commonly used in the manufacturing of springs. These include: 1. Carbon steel round bars: These are the most commonly used type of steel for springs. They have a high carbon content, typically ranging from 0.60% to 0.95%. Carbon steel round bars offer good strength and durability, making them suitable for a wide range of spring applications. 2. Alloy steel round bars: These are made by adding alloying elements such as chromium, manganese, nickel, or vanadium to carbon steel. Alloy steel round bars provide enhanced mechanical properties, including higher strength, toughness, and resistance to wear and corrosion. They are often used in heavy-duty or high-performance spring applications. 3. Stainless steel round bars: These are corrosion-resistant steel bars with a high chromium content (usually above 10.5%). Stainless steel round bars are popular for springs that require excellent resistance to rust, oxidation, and chemicals. They are commonly used in applications where hygiene, cleanliness, and aesthetic appeal are important, such as in the food and medical industries. 4. Spring steel round bars: These are specifically designed for spring manufacturing. They have a unique combination of properties, including high yield strength, good fatigue resistance, and excellent elasticity. Spring steel round bars are typically made from either carbon steel or alloy steel, depending on the specific requirements of the application. It is important to choose the right type of steel round bar based on factors such as the intended application, load requirements, environmental conditions, and desired spring performance. Consulting with a materials engineer or spring manufacturer can help determine the most suitable steel round bar for a specific spring manufacturing project.

Q: How are steel round bars used in the manufacturing of mining equipment?: Steel round bars are commonly used in the manufacturing of mining equipment due to their high strength and durability. These bars are often utilized as a key structural component in the construction of heavy machinery such as crushers, drilling rigs, and conveyor systems. They provide the necessary support and stability required to withstand the harsh operating conditions and heavy loads typically encountered in mining operations. Additionally, steel round bars can be machined and shaped to create various components such as shafts, pins, and gears, further enhancing the functionality and reliability of mining equipment.

Q: What are the tolerance standards for steel round bars?: The tolerance standards for steel round bars differ based on specific requirements and industry norms. Generally, the tolerance for the diameter or size of steel round bars is specified as a plus or minus tolerance. This implies that the actual diameter of the bar may slightly deviate from the specified size, but it must fall within the specified tolerance range. In certain industries, like construction or manufacturing, the tolerance for steel round bars may be broader to facilitate easier fabrication and installation. For instance, a common tolerance range for the diameter of steel round bars used in construction could be ±0.005 to ±0.010 inches. In more precise applications, such as aerospace or automotive industries, the tolerance requirements for steel round bars are typically stricter. In these cases, the tolerance range can be significantly smaller, often ranging from ±0.001 to ±0.002 inches. It is important to note that different countries and organizations may have their own specific tolerance standards for steel round bars. These standards are usually outlined in industry-specific documents or specifications, such as ASTM (American Society for Testing and Materials) or ISO (International Organization for Standardization) standards. In summary, the tolerance standards for steel round bars vary depending on the specific requirements of the industry and application. The tolerance range for diameter can range from relatively broad to extremely tight, and these standards are typically defined by industry-specific organizations or standards bodies.

Q: Can steel round bars be used in the construction industry?: Yes, steel round bars can be commonly used in the construction industry. They are versatile and widely used for various structural applications. Steel round bars offer high strength and durability, making them suitable for supporting heavy loads and providing structural stability in buildings, bridges, and other construction projects. They can be used as reinforcement in concrete structures, such as columns, beams, and slabs, to enhance their strength and resist bending or cracking. Additionally, steel round bars are often utilized in the fabrication of steel frameworks, scaffolding, and other support systems in the construction industry. Their availability in different sizes and grades allows for flexibility in meeting specific construction requirements. Overall, steel round bars are a vital component in the construction industry due to their strength, versatility, and ability to withstand demanding conditions.

Q: 45# what are the main rounds for?: 45# round bars are divided into three kinds: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of them: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.

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