ASTM 5140 Alloy Steel Round Bar System 1

ASTM 5140 Alloy Steel Round Bar System 2

ASTM 5140 Alloy Steel Round Bar System 3

ASTM 5140 Alloy Steel Round Bar System 4

ASTM 5140 Alloy Steel Round Bar

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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	0.37-0.44 %	Tensile strength(MPA)	≥980(100)
Si	0.17-0.37 %	Yield strength (MPA)	≥785(80)
Mn	0.50-0.80 %	Elongation (δ5/%)	≥9
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.30 %	Impact (J)	≥ 47
P	≤0.035 %	Impact toughness value αkv (J/cm2)	≥59(6)
S	≤0.035 %	Hardness	≤207HB
Cu	≤0.030 %

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 are steel round bars?: Steel round bars are long, cylindrical metal bars that are made from steel. They are commonly used in various industries such as construction, manufacturing, and engineering. These bars are known for their strength, durability, and versatility. Steel round bars are typically produced through a hot rolling process, where a solid steel billet is heated and passed through a series of rollers to achieve the desired shape and size. They come in a range of sizes and grades, with different properties depending on the specific application. These bars are often used as structural components in buildings, as shafts in machinery, as support bars in concrete structures, and as raw material for the production of other steel products. Due to their high tensile strength and resistance to corrosion, steel round bars are widely preferred in the construction and manufacturing sectors.

Q:How do you store and handle steel round bars?: Steel round bars should be stored in a dry and covered area to protect them from moisture and corrosion. They should be stacked horizontally on a flat surface, with spacers in between each layer to prevent deformation. When handling steel round bars, it is important to wear appropriate protective gear such as gloves and safety shoes. They should be lifted using proper lifting equipment, ensuring that the load is evenly distributed. Additionally, bars should not be dragged or rolled on the ground to avoid scratches or damage.

Q:What are the advantages of using weather-resistant steel round bars?: There are several advantages to using weather-resistant steel round bars. Firstly, weather-resistant steel round bars are designed to withstand the effects of harsh weather conditions. They are specifically formulated to resist corrosion, rust, and other forms of degradation caused by exposure to rain, snow, humidity, and even saltwater environments. This makes them highly suitable for outdoor applications, such as construction projects, marine structures, and infrastructure in coastal areas. Secondly, the use of weather-resistant steel round bars eliminates the need for additional protective coatings or treatments. Unlike regular steel, which requires regular maintenance and painting to prevent rust and corrosion, weather-resistant steel round bars possess a natural protective layer that forms on the surface, known as patina. This patina acts as a barrier against further corrosion, reducing the overall maintenance requirements and extending the lifespan of the material. Thirdly, weather-resistant steel round bars offer exceptional strength and durability. They are manufactured using a special alloy composition, which enhances their mechanical properties and makes them highly resistant to impact, bending, and fatigue. This makes them ideal for structural applications where strength and reliability are crucial, such as in bridges, building frameworks, and heavy machinery. Additionally, weather-resistant steel round bars have aesthetic advantages. The unique patina that develops on the surface of these bars gives them a distinctive appearance, often described as an attractive and warm reddish-brown color. This natural weathered look can be desirable for architectural and design purposes, adding a visually appealing element to structures and outdoor installations. Lastly, the use of weather-resistant steel round bars contributes to sustainability and cost-effectiveness. Due to their long lifespan and low maintenance requirements, these bars offer a more sustainable solution compared to traditional steel, which often requires frequent painting and replacement. Furthermore, the initial investment in weather-resistant steel round bars may be higher than regular steel, but the long-term savings in maintenance and replacement costs make them a cost-effective choice in the long run. In conclusion, the advantages of using weather-resistant steel round bars include their ability to withstand harsh weather conditions, eliminate the need for additional protective coatings, provide exceptional strength and durability, offer aesthetic appeal, and contribute to sustainability and cost-effectiveness.

Q:What is the difference between a rough turned and a precision ground steel round bar?: A rough turned steel round bar refers to a steel bar that has undergone a rough machining process to remove excess material and bring the bar to a closer approximation of its final dimensions. This process typically involves removing the outer layer of the bar through turning or other machining methods. However, the bar is not yet finished to precise tolerances and may still have slight variations in diameter or surface roughness. On the other hand, a precision ground steel round bar has undergone a secondary machining process known as grinding. Grinding is a more precise and controlled method of removing material from the surface of the bar. It involves using a grinding wheel or abrasive tool to carefully remove small amounts of material, resulting in a bar with highly precise dimensions and a smoother surface finish. Precision ground bars are typically made to meet specific tolerances and have a more consistent diameter, surface finish, and straightness compared to rough turned bars. The main difference between a rough turned and a precision ground steel round bar is the level of precision and surface finish achieved. Rough turned bars are suitable for applications where tight tolerances and surface finish are not critical, such as in certain structural or machinery components. Precision ground bars, on the other hand, are preferred when precise dimensions, tight tolerances, and a smooth surface finish are required, such as in precision machining applications or where the bar will be used as a shaft or component in critical machinery or equipment.

Q:Can steel round bars be used for making electrical components?: Steel round bars can be used for making certain electrical components, but it depends on the specific requirements and applications. Steel is a versatile material with good electrical conductivity and high durability, making it suitable for various electrical applications. However, for certain components that require specific electrical properties or insulation, other materials such as copper or aluminum may be more commonly used. Additionally, steel round bars may need to undergo surface treatments or coatings to prevent corrosion or improve electrical conductivity. Ultimately, the suitability of steel round bars for making electrical components should be assessed based on the specific requirements and regulations of the intended application.

Q:What are the different types of steel round bars used in the manufacturing of gears?: There are several different types of steel round bars that are commonly used in the manufacturing of gears. These include: 1. Carbon steel round bars: Carbon steel is one of the most commonly used materials in gear manufacturing. It offers good strength, wear resistance, and durability, making it suitable for a wide range of gear applications. 2. Alloy steel round bars: Alloy steel is a type of steel that contains additional alloying elements such as chromium, nickel, or molybdenum. These elements enhance the mechanical properties of the steel, including its strength, toughness, and resistance to wear and fatigue. Alloy steel round bars are often used in high-performance gears that require superior strength and durability. 3. Stainless steel round bars: Stainless steel is known for its corrosion resistance and high strength-to-weight ratio. It is often used in gear manufacturing applications where resistance to rust and corrosion is important, such as in marine or outdoor equipment. 4. Tool steel round bars: Tool steel is a type of high-carbon steel that is specifically designed to be used in cutting tools, molds, and dies. It has excellent hardness, wear resistance, and toughness, making it suitable for the manufacturing of gears that undergo heavy loads and high temperatures. 5. Case-hardened steel round bars: Case hardening is a heat treatment process that creates a hard surface layer on the steel, while maintaining a tough and ductile core. Case-hardened steel round bars are often used in gear manufacturing to provide a wear-resistant surface and improve the overall strength and durability of the gears. The choice of steel round bar for gear manufacturing depends on various factors, such as the specific application, desired mechanical properties, and budget constraints. It is important to select the appropriate type of steel that meets the requirements of the gear in terms of strength, wear resistance, and durability to ensure optimal performance and longevity.

Q:What are the different surface roughness options for steel round bars?: The different surface roughness options for steel round bars can vary depending on the manufacturing process and specific requirements. Some common surface finishes for steel round bars include smooth, turned and polished, ground, and rough. These options provide different levels of smoothness and surface texture to meet various industrial and aesthetic needs.

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 exhaust systems?: Indeed, exhaust systems can be fabricated using steel round bars. Steel, being renowned for its endurance, resistance to heat, and capacity to endure extreme temperatures and harsh surroundings, is widely favored as a material for exhaust systems. By utilizing steel round bars, one can fashion the pipes, mufflers, and other constituents of an exhaust system. Moreover, these bars can be readily welded and molded into the preferred shape, enabling customization and design flexibility. Furthermore, steel round bars can furnish the essential strength and structural soundness imperative for an effective and enduring exhaust system.

Q:Can steel round bars be used for making control arms?: Yes, steel round bars can be used for making control arms. They are commonly used in the automotive industry as they provide strength, durability, and stability required for control arm applications.

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