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 the different grades of carbon steel round bars for structural applications?: The different grades of carbon steel round bars commonly used for structural applications include ASTM A36, ASTM A572, and ASTM A992.

Q: What are the different types of steel round bar surface treatments used in the aerospace industry?: In the aerospace industry, there are several types of steel round bar surface treatments that are commonly used to enhance the performance and durability of the materials. These treatments are specifically designed to meet the stringent requirements and standards set by the industry. Some of the different types of steel round bar surface treatments used in the aerospace industry include: 1. Passivation: This treatment involves the removal of iron particles and other contaminants from the surface of the steel round bar. It helps to prevent corrosion and improves the overall corrosion resistance properties of the material. 2. Shot Peening: Shot peening is a process that involves bombarding the surface of the steel round bar with small metallic shots. This treatment induces compressive stress on the surface, which enhances the material's fatigue strength and resistance to stress corrosion cracking. 3. Electroplating: Electroplating is a common surface treatment used in the aerospace industry. It involves the deposition of a layer of metallic coating onto the steel round bar through an electrochemical process. This treatment enhances the material's corrosion resistance, wear resistance, and aesthetic appearance. 4. Anodizing: Anodizing is an electrolytic passivation process that is commonly used on aluminum alloys. However, it can also be used on steel round bars. This treatment forms a thick, durable, and corrosion-resistant layer of oxide on the surface, which improves the material's resistance to wear, corrosion, and scratching. 5. Nitriding: Nitriding is a surface hardening treatment that involves the diffusion of nitrogen into the surface of the steel round bar. This treatment improves the material's surface hardness, wear resistance, and fatigue strength. 6. Chemical Conversion Coating: Chemical conversion coating is a treatment that involves the formation of a thin, protective layer on the surface of the steel round bar. This coating enhances the material's corrosion resistance and provides a good base for subsequent paint or coating applications. These are just a few examples of the different types of steel round bar surface treatments used in the aerospace industry. Each treatment offers unique benefits and is selected based on the specific requirements of the application, such as corrosion resistance, wear resistance, fatigue strength, and aesthetic appearance.

Q: How do you measure the length of a steel round bar?: In order to determine the length of a steel round bar, one must utilize a measuring tool, specifically a tape measure or ruler. Firstly, it is important to confirm that the bar is positioned upon a level surface. Subsequently, align the zero mark of the tape measure or ruler with one extremity of the bar. Steadily hold the measuring tool against the bar and proceed to extend it along the entire span until reaching the opposing end. Pay close attention to the measurement displayed on the tape measure or ruler at the precise point where the other end of the bar lines up. This measurement denotes the length of the steel round bar.

Q: What is the difference between a seamless and a turned steel round bar?: The manufacturing process and resulting characteristics distinguish a seamless steel round bar from a turned steel round bar. To produce a seamless steel round bar, a solid steel billet is pierced, typically through hot rolling. This creates a hollow tube-like structure that is then elongated and shaped into the desired round bar form. The absence of welded joints or seams along its length gives the seamless bar a smooth and continuous surface. This manufacturing method improves the overall strength and durability of the round bar. In contrast, a turned steel round bar begins as a solid steel bar obtained through casting or hot rolling. The bar undergoes a machining process called turning, where it is rotated against a cutting tool to remove material and achieve the desired dimensions and shape. This turning process results in a round bar with a smooth and polished surface. However, there may be mill marks or slight imperfections due to the machining process, unlike a seamless round bar. Seamless steel round bars are often preferred in industries that require high strength and reliability, such as construction, automotive, and oil and gas. Their uniform structure and absence of welds make them highly resistant to cracking and failure under heavy loads or extreme conditions. On the other hand, turned steel round bars are commonly used in applications where a smooth surface finish is desired, such as decorative pieces or precision components for machinery. In summary, the main difference between a seamless and a turned steel round bar lies in their manufacturing process and resulting characteristics. While both provide a smooth surface finish, seamless round bars offer enhanced strength and reliability due to their seamless structure, whereas turned round bars are often chosen for their precise dimensions and aesthetic qualities.

Q: What are the advantages of using high-temperature steel round bars?: There are several advantages of using high-temperature steel round bars in various applications. Firstly, high-temperature steel round bars have excellent heat resistance properties, allowing them to withstand elevated temperatures without compromising their structural integrity. This makes them ideal for use in industries such as aerospace, automotive, and power generation, where components are exposed to extreme heat conditions. Another advantage of high-temperature steel round bars is their superior strength and durability. These bars are designed to withstand high mechanical stresses, making them ideal for applications that require heavy loads or intense pressure. Their high strength-to-weight ratio also allows for lighter and more efficient designs, reducing overall material and production costs. In addition, high-temperature steel round bars have excellent corrosion resistance properties. This means they can withstand exposure to harsh environments, including chemicals, moisture, and saltwater, without experiencing significant degradation. This makes them suitable for use in marine, chemical, and oil and gas industries where corrosion resistance is crucial. Furthermore, high-temperature steel round bars offer excellent dimensional stability, meaning they maintain their shape and size even under extreme temperature fluctuations. This property is highly beneficial in applications where precision and accuracy are essential, such as in machining and tooling. Lastly, high-temperature steel round bars are readily available in various sizes, grades, and finishes, allowing for flexibility and customization to meet specific project requirements. This versatility makes them suitable for a wide range of applications and ensures that there is a suitable option for every project, regardless of complexity or industry. Overall, the advantages of using high-temperature steel round bars include superior heat resistance, strength, durability, corrosion resistance, dimensional stability, and versatility. These properties make them an excellent choice for various industries and applications, ensuring reliable and long-lasting performance in demanding environments.

Q: Can steel round bars be used for making gates?: Indeed, gates can be made using steel round bars. The strength, durability, and versatility of steel round bars make them a favored option for gate production. Welding them together to achieve the desired gate design is a simple task, and they possess the capacity to endure substantial loads and impacts. Furthermore, steel round bars can undergo galvanization or coating processes in order to safeguard them against rust and corrosion, enhancing the gate's longevity. As a result, steel round bars are an appropriate material for constructing gates and are frequently employed in residential, commercial, and industrial settings.

Q: Can steel round bars be used for hydraulic cylinder applications?: Certainly, hydraulic cylinder applications can indeed make use of steel round bars. Given their remarkable strength and durability, steel round bars find frequent application in the fabrication of hydraulic cylinders. They exhibit exceptional resistance to impact, corrosion, and wear, rendering them ideal for demanding tasks. Furthermore, steel round bars can be conveniently machined and shaped to meet precise dimensional specifications for hydraulic cylinder components. Consequently, steel round bars enjoy significant popularity when it comes to hydraulic cylinder applications.

Q: What are the advantages of using heat-treatable steel round bars?: There are several advantages of using heat-treatable steel round bars: 1. Increased strength: Heat-treatable steel round bars can be subjected to controlled heating and cooling processes, which enhances their strength and hardness. This makes them suitable for applications that require high strength and durability. 2. Improved wear resistance: Through heat treatment, the steel round bars can develop a hardened surface layer, which significantly improves their resistance to wear and abrasion. This makes them ideal for use in industries such as manufacturing, construction, and automotive, where components are subjected to heavy wear and tear. 3. Customizability: Heat-treatable steel round bars offer the advantage of being easily customizable to meet specific requirements. By adjusting the heat treatment process, the hardness, strength, and other mechanical properties of the bars can be tailored to suit different applications, ensuring optimal performance. 4. Machinability: Heat-treatable steel round bars typically have good machinability, which means they can be easily cut, drilled, or shaped into various forms without compromising their structural integrity. This makes them convenient to work with, reducing production time and costs. 5. Versatility: Heat-treatable steel round bars are highly versatile and find applications in a wide range of industries, including construction, manufacturing, oil and gas, automotive, and aerospace. They are commonly used in the production of shafts, gears, bolts, axles, and other critical components. 6. Cost-effectiveness: While heat-treatable steel round bars may have a higher initial cost compared to non-heat-treatable or lower-grade steels, their durability and enhanced properties make them cost-effective in the long run. The improved strength and wear resistance lead to longer service life, reducing the need for frequent replacements and maintenance. Overall, the advantages of using heat-treatable steel round bars include increased strength, improved wear resistance, customizability, good machinability, versatility, and cost-effectiveness. These benefits make them a preferred choice for demanding applications that require high-performance materials.

Q: What is the difference between a hot rolled and a precision ground steel round bar?: The main difference between a hot rolled and a precision ground steel round bar is the manufacturing process and the resulting surface finish. Hot rolled steel round bars are made by heating a steel billet until it is soft enough to be formed into a round shape, then rolling it through a series of rollers to achieve the desired diameter. This process creates a rougher surface finish and can result in slight variations in diameter along the length of the bar. On the other hand, precision ground steel round bars are made by starting with a hot rolled bar and then subjecting it to additional grinding or machining processes to achieve a precise diameter and a smooth, consistent surface finish. This extra processing ensures that the bar has a more uniform size and a finer surface texture, making it suitable for applications that require tight tolerances and a polished appearance. Overall, the choice between a hot rolled and a precision ground steel round bar depends on the specific requirements of the application. Hot rolled bars are generally more cost-effective and suitable for less demanding applications, while precision ground bars are preferred for precision machining and high-performance applications.

Q: What are the different types of steel round bar shapes?: There are several different types of steel round bar shapes available, each with its own unique characteristics and applications. Some common types include: 1. Round: This is the most basic and widely used shape for steel round bars. It is cylindrical in shape and is used in a variety of industries, including construction, manufacturing, and automotive. 2. Square: Square steel round bars have four equal sides and are often used in applications where a strong, sturdy shape is required. They are commonly used in construction, architectural designs, and machinery. 3. Hexagonal: Hexagonal steel round bars have six sides, giving them a unique shape. They are often used in applications where high strength and resistance to corrosion are required. Hexagonal bars are commonly used in industries such as aerospace, defense, and oil and gas. 4. Flat: Flat steel round bars have a rectangular cross-section with a flat top and bottom surface. They are often used in applications where a wide, flat surface is required, such as construction, machinery, and manufacturing. 5. Half Round: Half-round steel round bars have a semicircular shape with a flat bottom surface. They are commonly used in applications such as handrails, fencing, and decorative purposes. 6. D-shaped: D-shaped steel round bars have a flat bottom surface and a curved top surface, resembling the letter "D". They are often used in applications where a strong, yet lightweight shape is required, such as automotive frames and chassis. These are just a few examples of the different types of steel round bar shapes available. The choice of shape depends on the specific requirements of the application, including strength, durability, corrosion resistance, and aesthetic appeal.

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