Round Steel 5115 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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Material standardized according to	5115 round steel round bar
Unfinished products manufactured	Pipes - profiles - squares
Properties	Excellent mechanical features - good workability on high-speed automatic machines with easy fragmentation of the shavings made by the tool
Typical applications	used for making heavy loading and sectional gear shaft,gear,connecting rod,eccentric shaft,rear axle shaft of car,parts of steam turbine,etc

C	Cr	Si	p	Mn	Ni
0.37~0.45	0.90~1.20	0.17~0.37	≤0.035	0.90~1.20	≤0.030

Quenching Temp	860 ±15 °C
Cool Media	Oil
Tempering Temp	600 ±15 °C
Cooling Media	air

Tensile Strength (MPA)	Yield Strength(MPA)	Elongation(%)	Reduction In Area(%)	Impact Energy(J)	Hardness(HB)
≥1080	≥ 930	≥ 12	≥ 45	≥ 63	≥217

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 manufacturing of architectural features?: Yes, steel round bars can be used in the manufacturing of architectural features. Steel round bars are versatile and strong, making them suitable for various applications in the construction industry, including architectural features. They can be used to create structural elements such as columns, beams, and supports, as well as decorative elements like stair railings, balustrades, and ornamental sculptures. Steel round bars offer durability, stability, and resistance to corrosion, making them an ideal choice for architectural features that need to withstand the test of time and harsh environmental conditions. Additionally, steel round bars can be easily fabricated and shaped into different designs, allowing for creativity and customization in architectural projects.

Q: Can steel round bars be heat treated for improved strength?: Yes, steel round bars can be heat treated to improve their strength. Heat treatment involves subjecting the steel to specific heating and cooling processes to alter its microstructure and properties. The most common heat treatment processes for steel round bars are quenching and tempering. During quenching, the steel round bar is heated to a high temperature and then rapidly cooled by immersing it in a quenching medium such as water, oil, or polymer. This rapid cooling helps to harden the steel by transforming its microstructure into a martensitic structure, which is harder and stronger. After quenching, the steel round bar is often tempered to reduce its brittleness and increase its toughness. Tempering involves reheating the quenched steel to a lower temperature and then slowly cooling it. This process relaxes the internal stresses created during quenching and allows the steel to achieve a balance between hardness and toughness, resulting in improved strength. It is important to note that the specific heat treatment process and parameters will depend on the type and grade of steel being used. Therefore, it is recommended to consult with a metallurgical expert or refer to the manufacturer's guidelines to determine the appropriate heat treatment process for a particular steel round bar to achieve the desired strength improvement.

Q: Can steel round bars be used in the production of musical instruments?: Yes, steel round bars can be used in the production of musical instruments. They are commonly used to make components such as keys, rods, and supports in various instruments such as pianos, xylophones, and various percussion instruments.

Q: What are the different types of steel round bar alloys for improved machinability?: There are several types of steel round bar alloys that are specifically designed to improve machinability. These alloys are chosen for their ability to be easily shaped, cut, and drilled, which is crucial in various machining applications. Some of the commonly used steel round bar alloys for improved machinability include: 1. 12L14 Steel: This alloy contains added lead, which enhances its machinability. The presence of lead lubricates the cutting tool, reduces friction, and improves chip formation during the machining process. 2. 1215 Steel: Similar to 12L14, 1215 steel also contains added lead, which provides excellent machinability. This alloy is known for its high cutting speeds, smooth surface finish, and improved chip control. 3. 4140 Steel: Although not specifically designed for machinability, 4140 steel is known for its excellent overall machining properties. With proper heat treatment, this alloy offers good strength, toughness, and wear resistance while still maintaining a reasonable level of machinability. 4. 1018 Steel: This low carbon steel alloy is widely used for its excellent machinability. It is easy to cut, drill, and shape, making it suitable for a variety of machining operations. However, it may have lower strength compared to some other alloys. 5. 8620 Steel: This alloy is specifically designed for case hardening, but it also offers good machinability. 8620 steel can be easily machined, providing high surface finish and dimensional accuracy. 6. 416 Stainless Steel: This stainless steel alloy provides good machinability due to its sulfur content. It is used in applications where corrosion resistance is required along with improved machinability. These are just a few examples of steel round bar alloys that are chosen for their enhanced machinability. The selection of the appropriate alloy depends on the specific machining requirements and the desired properties in the final product.

Q: How do steel round bars compare to plastic or composite bars?: Steel round bars are generally considered to be stronger and more durable compared to plastic or composite bars. They have higher tensile strength, can withstand heavier loads, and are less prone to bending or breaking. Additionally, steel bars offer better resistance to harsh weather conditions, corrosion, and fire. However, plastic or composite bars can be more lightweight and cost-effective, making them suitable for certain applications where weight or budget is a concern. Overall, the choice between steel, plastic, or composite bars depends on the specific requirements of the project or application.

Q: What are the different grades of steel round bars?: Steel round bars come in various grades, each with its own distinct properties and characteristics. Some of the most commonly used grades are as follows: 1. Mild Steel, also known as low carbon steel, is widely preferred due to its affordability and versatility. It has a relatively low carbon content and is easily weldable and malleable. 2. Carbon Steel has a higher carbon content compared to mild steel, resulting in increased strength and durability. It is commonly used in applications that demand high strength and hardness, such as construction and machinery. 3. Alloy Steel round bars are created by combining carbon steel with different elements like chromium, nickel, or molybdenum. This combination enhances the material's properties, such as improved corrosion resistance, toughness, and tensile strength. 4. Stainless Steel round bars are predominantly made of iron and contain at least 10.5% chromium. This grade of steel is renowned for its exceptional corrosion resistance and is commonly used in industries, such as food and pharmaceuticals, where cleanliness and hygiene are critical. 5. Tool Steel round bars are specifically designed to withstand high temperatures, heavy loads, and repetitive impacts. They possess excellent hardness, wear resistance, and toughness, making them ideal for manufacturing tools and dies. 6. High-Speed Steel (HSS) round bars, a type of tool steel, can maintain their hardness even at high cutting speeds. They find extensive use in cutting, drilling, and machining applications that require high speeds, such as the production of drills and milling cutters. These are just a few examples of the wide variety of steel round bar grades available. Each grade is tailored to meet specific requirements in different industries and applications. It is crucial to select the appropriate grade based on factors like strength, corrosion resistance, and desired properties for a particular project or usage.

Q: Can steel round bars be used for making tools?: Yes, steel round bars can be used for making tools. Steel round bars are commonly used in tool making due to their strength, durability, and versatility. The high tensile strength of steel makes it suitable for withstanding heavy use and providing stability to tools. Additionally, steel round bars can be easily machined and shaped into various tool designs, allowing for the creation of different types of tools such as wrenches, chisels, punches, and hammers. Moreover, steel's resistance to corrosion ensures that tools made from steel round bars will have a longer lifespan. Overall, steel round bars are a popular choice in tool making due to their excellent mechanical properties and suitability for various applications.

Q: What are the different types of steel alloys used for round bars?: There are several different types of steel alloys used for round bars, each offering unique properties and characteristics that make them suitable for various applications. Some of the commonly used steel alloys for round bars include: 1. Carbon Steel: This is the most common type of steel alloy used for round bars. It contains primarily carbon and iron, and offers excellent strength and toughness. Carbon steel round bars are commonly used in construction, manufacturing, and general engineering applications. 2. Stainless Steel: This alloy contains chromium, which provides corrosion resistance and makes it suitable for applications where rust or oxidation is a concern. Stainless steel round bars are widely used in the food and beverage industry, as well as in marine and chemical industries. 3. Alloy Steel: This type of steel alloy is made by adding other elements such as manganese, nickel, or chromium to improve its mechanical properties. Alloy steel round bars are known for their high strength, hardness, and resistance to wear and tear. They are commonly used in automotive, aerospace, and machinery industries. 4. Tool Steel: Tool steel alloys are specifically designed to have high hardness, wear resistance, and toughness. They are used for making cutting tools, dies, and molds. Tool steel round bars are available in various grades, such as D2, O1, and A2, each with specific properties for different applications. 5. Duplex Steel: This alloy contains a combination of austenitic and ferritic stainless steels, offering a combination of high strength and corrosion resistance. Duplex steel round bars are used in applications where both strength and resistance to corrosion are required, such as in the oil and gas industry. These are just a few examples of the different types of steel alloys used for round bars. The specific choice of alloy depends on the desired properties and the intended application of the round bar.

Q: What are the factors to consider when selecting a steel round bar for a specific application?: When choosing a steel round bar for a particular application, there are several key factors that need to be taken into account. Firstly, the material grade of the steel round bar is of utmost importance. Different grades of steel have different properties, such as strength, hardness, and resistance to corrosion. It is crucial to select a material grade that is suitable for the specific requirements of the application. Secondly, the mechanical properties of the steel round bar, such as tensile strength, yield strength, and elongation, need to be carefully evaluated. These properties determine how well the bar can withstand forces and deformations under load. It is important to choose a steel round bar with mechanical properties that are compatible with the demands of the application. The size and dimensions of the steel round bar also play a critical role. This includes considering the diameter, length, and tolerance requirements. The dimensions should be chosen based on the structural needs of the application and the desired load-bearing capacity of the bar. The surface finish of the steel round bar is significant, particularly in applications where aesthetics or contact with other components are important. Factors such as smoothness, roughness, and the presence of coatings or treatments should be taken into account. Depending on the environment in which the application will be used, it is crucial to select a steel round bar with adequate corrosion resistance. Factors such as exposure to moisture, chemicals, or extreme temperatures can impact the bar's performance and longevity. Options like stainless steel or corrosion-resistant coatings can be considered to enhance the bar's resistance to corrosion. If the steel round bar needs to be machined or fabricated into a specific shape, its machinability must be considered. Some steel grades are easier to machine than others and may require different tools or techniques. It is important to choose a bar with a machinability that aligns with the desired manufacturing processes. Lastly, the cost of the steel round bar should not be overlooked. Different material grades and specifications come with varying price points. It is important to strike a balance between the required properties and performance of the bar and the budget constraints of the project. In conclusion, selecting a steel round bar for a specific application necessitates careful consideration of the material grade, mechanical properties, size, surface finish, corrosion resistance, machinability, and cost. By taking these factors into account, one can ensure that the chosen steel round bar will meet the requirements of the application and deliver optimal performance.

Q: What are the different types of steel round bar alloys for improved machinability and strength?: There are several different types of steel round bar alloys that are specifically designed to offer improved machinability and strength. These alloys are commonly used in various industries where the ability to machine components efficiently while maintaining high tensile strength is crucial. Some of the most popular steel round bar alloys for improved machinability and strength include: 1. 12L14: This alloy contains lead, which acts as a lubricant during machining, resulting in improved chip formation and reduced tool wear. It offers excellent machinability and good strength, making it suitable for applications that require intricate machining processes. 2. 4140: Also known as "chromoly" steel, this alloy contains chromium and molybdenum, which enhance its strength and hardenability. 4140 steel round bars are widely used in applications that require high tensile strength, such as automotive parts, shafts, and gears. 3. 8620: This alloy is a low-alloy nickel-chromium-molybdenum steel that offers a combination of high strength and good toughness. It can be easily machined and is often used in applications that require case-hardening, such as gears, shafts, and fasteners. 4. 1018: Known as "cold-rolled" or "cold-finished" steel, 1018 is a low-carbon steel alloy that offers good machinability and weldability. It is commonly used in applications where precise and smooth finishes are required, such as in the manufacturing of bolts, screws, and hydraulic fittings. 5. 52100: This alloy is a high carbon, chromium-bearing steel that is primarily used in the manufacturing of bearings and other high-wear applications. It offers excellent hardness, wear resistance, and machinability, making it suitable for components that require high strength and durability. These are just a few examples of the different types of steel round bar alloys available for improved machinability and strength. The choice of alloy depends on the specific requirements of the application, such as the desired strength, machinability, and durability. Consulting with a materials engineer or supplier can help determine the most suitable alloy for a particular use case.

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