AISI 4340 Forged Steel Round Bars System 1

AISI 4340 Forged Steel Round Bars System 2

AISI 4340 Forged Steel Round Bars System 3

AISI 4340 Forged Steel Round Bars System 4

AISI 4340 Forged Steel Round 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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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.38-0.43 %	Tensile strength(MPA)	≥980(100)
Si	0.15-0.35 %	Yield strength (MPA)	≥835(85)
Mn	0.60-0.80 %	Elongation (δ5/%)	≥12
Cr	0.70-0.90 %	Reduction in Area (ψ/%)	≥55
Ni	1.65-2.00 %	Impact (J)	≥ 78
P	≤0.035 %	Impact toughness value αkv (J/cm2)	≥98(10)
S	≤0.040 %	Hardness	≤269HB
Mo	0.20-0.30 %

Standard	ASTM A29/A 29M-05
Grade	4340
MOQ	1 Metric Ton
Diameter	8mm~1500mm
Length	6m,12m or as required.
Diameter Tolerance	As required
Condition of delivery	Hot rolled,Cold Rolled or as required.

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 outdoor applications?: Indeed, outdoor applications can make use of steel round bars. Steel, being a robust and long-lasting material, possesses corrosion resistance, thus rendering it suitable for outdoor purposes. Construction, manufacturing, and infrastructure projects frequently employ round bars to offer structural support and reinforcement. Furthermore, steel round bars exhibit the ability to withstand diverse weather conditions, such as rain, snow, and extreme temperatures, while retaining their strength and integrity. Nevertheless, it is crucial to carefully choose the most suitable type of steel for the specific outdoor application to guarantee optimal performance and longevity.

Q: Is yuan steel round steel?: 3 strength, steel and other steel with high strength low strength, namely, diameter of the same size as compared with other steel, round steel can bear the pulling force than other reinforced small, but the plastic steel reinforced bar is stronger than the other, there is a large deformation in the break before, and it reinforced the deformation the break before the much smaller.

Q: Can steel round bars be used for making shafts?: Yes, steel round bars can be used for making shafts. Steel round bars are widely used in various industries for making shafts due to their high strength and durability. They can withstand heavy loads, resist bending and twisting forces, and provide excellent performance in applications that require the transmission of power or rotational movement. Steel round bars also offer good machinability, allowing them to be easily shaped and formed into shafts of different sizes and dimensions. Additionally, steel round bars can be heat treated to enhance their strength and hardness, further making them suitable for shafts in demanding environments. Overall, steel round bars are a popular choice for making shafts due to their inherent properties and reliability in various industrial applications.

Q: Can steel round bars be used for making transmission towers?: Yes, steel round bars can be used for making transmission towers. Steel round bars are strong, durable, and have excellent load-bearing capabilities, making them suitable for supporting the weight and structure of transmission towers.

Q: How do you identify the grade of a steel round bar?: There are several ways to determine the grade of a steel round bar. First, examining the markings or labels on the bar itself can provide valuable information. Manufacturers often imprint or etch the grade directly onto the bar's surface. These markings usually include details like the grade designation (e.g., 304, 316, 4140), which represents the specific alloy composition, and may also include additional information such as the heat or lot number. Another method involves consulting the mill test certificate (MTC) that comes with the steel round bar. The MTC provides extensive information about the composition, mechanical properties, and other relevant specifications of the material. Typically, the steel mill or supplier issues the MTC, and it can be requested at the time of purchase. Additionally, the grade of a steel round bar can be determined through visual inspection and physical testing. Visual inspection entails examining the bar's appearance, texture, and color. Different grades of steel exhibit distinct characteristics, such as a glossy or matte finish, specific surface treatments, or variations in color due to varying alloying elements. Physical testing methods, such as tensile or hardness testing, can further confirm the steel grade. These tests measure the material's mechanical properties, including its strength, ductility, and hardness. By comparing the test results with established standards and specifications for different steel grades, it is possible to identify the grade of the round bar. In conclusion, to ascertain the grade of a steel round bar, one can inspect the markings, refer to the mill test certificate, visually assess the bar, and conduct physical tests to evaluate its mechanical properties.

Q: Can steel round bars be used in the transportation industry?: Yes, steel round bars can be used in the transportation industry. Steel round bars are known for their strength and durability, making them ideal for applications in the transportation industry where safety, reliability, and load-bearing capacity are essential. Steel round bars can be used for various purposes in transportation, such as constructing the framework for vehicles, manufacturing axles, drive shafts, suspension components, and other critical parts. The high tensile strength of steel ensures that these components can withstand heavy loads and vibrations, making them suitable for use in trucks, buses, cars, trains, and other modes of transportation. Additionally, steel round bars can be easily machined and fabricated into different shapes, allowing for customization and adaptation to specific transportation requirements.

Q: What is the minimum diameter available for steel round bars?: The specific manufacturing and supplier capabilities can cause variations in the minimum diameter of available steel round bars. Typically, a wide range of diameters can be found, starting from as small as 1/8 inch (3.175 mm) and going up to several inches or even larger. To ascertain the exact minimum diameter for steel round bars that aligns with your specific needs, it is advisable to consult with steel suppliers or manufacturers.

Q: What are the different finishes available for steel round bars?: There are several different finishes available for steel round bars, each of which serves a specific purpose and provides distinct benefits. Some of the most common finishes include: 1. Hot Rolled: This finish is achieved by heating the steel above its recrystallization temperature and then rapidly cooling it. It results in a rough, scaly surface texture that provides excellent corrosion resistance and durability. 2. Cold Rolled: In this process, the steel is rolled at room temperature, resulting in a smooth and polished finish. Cold rolled steel round bars are known for their precise dimensions, tight tolerances, and improved surface finish. 3. Bright Drawn: This finish involves subjecting the steel round bars to a drawing process, where they are pulled through a die to achieve the desired shape and size. It leaves the surface smooth, bright, and free from any imperfections or defects. 4. Polished: Polishing is typically done after the steel round bars have been cold rolled or drawn. It involves using abrasive materials or chemical treatments to remove any surface imperfections and create a highly reflective finish. Polished steel round bars are often used in decorative applications. 5. Ground: Grinding is a process where the steel round bars are subjected to abrasive wheels to remove any surface imperfections or irregularities. It results in a smooth and even finish, making the bars suitable for applications where tight tolerances and uniformity are required. 6. Galvanized: Galvanizing is a coating process where the steel round bars are dipped in a bath of molten zinc. This creates a protective layer that prevents corrosion and increases the lifespan of the bars, making them suitable for outdoor applications or environments with high humidity or moisture. These different finishes offer a range of properties and appearances, allowing steel round bars to be used in various industries and applications such as construction, automotive, manufacturing, and engineering. It is important to consider the specific requirements and conditions of the intended use when selecting the appropriate finish for steel round bars.

Q: Can steel round bars be polished?: Indeed, it is possible to polish steel round bars. The act of polishing steel round bars encompasses the utilization of abrasive substances, for instance, sandpaper or polishing compounds, to eliminate any flaws or coarse areas on the bar's exterior. This procedure can be executed manually or with the aid of machinery exclusively devised for polishing metals. Ultimately, a sleek and lustrous surface is achieved on the steel round bar. Nevertheless, it is imperative to acknowledge that the specific polishing methods and materials needed are contingent upon the type of steel and the desired end result.

Q: What are the different heat treatment methods for steel round bars?: Some of the common heat treatment methods for steel round bars include annealing, normalizing, quenching, tempering, and case hardening.

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