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

Ref Price:

Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

Inquire Now

Chat Online

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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:Are steel round bars used in the aerospace industry?: Indeed, it is common practice to employ steel round bars within the aerospace industry. Renowned for their exceptional strength, durability, and resistance to corrosion, these round bars prove themselves as an excellent choice for aircraft components and structures. They find frequent application in the creation of landing gears, engine mounts, structural frames, and other pivotal aircraft parts. Moreover, steel round bars are also utilized in the production of aerospace fasteners, such as bolts and screws, owing to their capacity to endure immense stress and establish a steadfast connection. In summary, the pivotal role played by steel round bars in guaranteeing the safety and dependability of aerospace systems cannot be overstated.

Q:What is the fatigue strength of a steel round bar?: The fatigue strength of a steel round bar refers to its ability to withstand repeated or cyclic loading without failure. It is a measure of the bar's resistance to fatigue or fatigue-induced failure. The fatigue strength of a steel round bar depends on various factors such as the material composition, manufacturing process, surface finish, and geometry of the bar. To determine the fatigue strength of a steel round bar, fatigue tests are typically conducted using standardized procedures. These tests involve subjecting the bar to repeated loading cycles that simulate real-world conditions. The bar is subjected to a specific stress amplitude or stress range, and the number of cycles required to cause failure is recorded. The fatigue strength of a steel round bar is usually expressed as the stress level or stress range at which failure occurs after a certain number of cycles, such as 10^6 cycles or 10^7 cycles. This value is commonly referred to as the fatigue limit or endurance limit. For steel round bars, the fatigue strength is generally high compared to other materials, and it is usually expressed in terms of stress in megapascals (MPa) or pounds per square inch (psi). It is important to note that the fatigue strength of a steel round bar can vary depending on factors such as the presence of surface defects, residual stresses, temperature, and environmental conditions. Therefore, it is crucial to consider these variables when determining the fatigue strength of a specific steel round bar for a given application.

Q:Can steel round bars be used for making medical equipment?: Medical equipment can indeed be made using steel round bars. Steel is a versatile and durable material that is commonly used in the manufacturing of medical instruments and equipment. It possesses excellent strength and can withstand high levels of stress and pressure, making it suitable for a wide range of medical applications. Moreover, steel's resistance to corrosion and its ability to be easily sterilized ensure that the medical equipment remains hygienic and safe for use. Steel round bars can be machined, shaped, and formed into various medical instruments such as surgical tools, implants, braces, and prosthetics. Therefore, steel round bars are a viable option for producing medical equipment due to their strength, durability, and compatibility with sterilization processes.

Q:What is the difference between a cold finished and a turned steel round bar?: A cold finished steel round bar is processed through cold drawing or cold rolling processes, resulting in a smoother and more precise surface finish. On the other hand, a turned steel round bar is machined on a lathe, which removes material to achieve the desired dimensions and surface finish. Overall, the difference lies in the manufacturing process and the resulting surface finish of the two types of steel round bars.

Q:What are the advantages of using case-hardening steel round bars?: There are several advantages to using case-hardening steel round bars. Firstly, case-hardening steel round bars have a hardened outer layer or "case" while maintaining a relatively soft and ductile core. This allows for excellent wear resistance on the surface, making them ideal for applications where the material comes into contact with abrasive or erosive forces. The hardness of the outer layer also provides increased strength and durability, enhancing the lifespan of the round bars. Another advantage of case-hardening steel round bars is their ability to withstand high impact loads. The hardened outer layer provides a barrier that absorbs and disperses the impact energy, preventing deformation or breakage of the material. This makes them suitable for applications where the round bars are subjected to heavy loads or impacts, such as in machinery or construction equipment. Additionally, case-hardening steel round bars offer improved fatigue resistance. The hardened surface layer helps to distribute stresses evenly, reducing the likelihood of cracks or fractures developing under cyclic loading conditions. This makes them suitable for use in applications that require long-term durability and resistance to repeated stress, such as automotive components or gears. Furthermore, case-hardening steel round bars have excellent machinability. The soft and ductile core allows for easy cutting, drilling, and shaping, while the hardened surface provides the necessary wear resistance. This makes them cost-effective and efficient to work with, as they can be easily formed into various shapes and sizes to meet specific design requirements. In conclusion, the advantages of using case-hardening steel round bars include excellent wear resistance, high impact load resistance, improved fatigue resistance, and excellent machinability. These properties make them a versatile and reliable choice for a wide range of applications in industries such as automotive, construction, and manufacturing.

Q:Are steel round bars prone to fatigue failure?: Fatigue failure is a common occurrence in steel round bars, which can be attributed to repeated cyclic loading or stress. This leads to a gradual weakening of the material, eventually causing it to fail, even if the applied stress is below its ultimate strength. Due to their inherent characteristics, steel round bars, like other structural materials, are susceptible to fatigue failure. Various factors can contribute to fatigue failure in steel round bars, including improper design, inadequate material selection, manufacturing defects, and excessive cyclic loading. Additionally, surface defects, notches, stress concentrations, and corrosive environments can further accelerate the fatigue process. Engineers and designers take several measures to mitigate the risk of fatigue failure. These include implementing appropriate design practices, selecting high-quality materials, conducting thorough inspections, applying stress-relieving treatments, and considering the impact of cyclic loading during the structural design phase. It is important to understand that the susceptibility of steel round bars to fatigue failure depends on multiple factors, such as the specific steel grade, loading conditions, environmental factors, and overall structural design. Therefore, it is crucial to carefully assess these factors and employ appropriate mitigation measures to ensure the safe and reliable performance of steel round bars in various applications.

Q:What are the environmental benefits of using steel round bars?: There are several environmental benefits of using steel round bars: 1. Recyclability: Steel is one of the most recycled materials in the world. Using steel round bars reduces the demand for new steel production and saves energy and resources. Additionally, recycling steel reduces the amount of waste sent to landfills, helping to reduce environmental pollution. 2. Durability: Steel round bars are highly durable and have a long lifespan. This means that they do not need to be replaced frequently, reducing the overall consumption of materials. The durability of steel also reduces the need for maintenance and repairs, further reducing environmental impact. 3. Energy efficiency: Producing steel round bars requires less energy compared to other construction materials like concrete or wood. The energy savings are significant throughout the entire life cycle of the product, including extraction, manufacturing, transportation, and installation. 4. Reduced carbon emissions: Steel production emits less carbon dioxide (CO2) compared to other materials. By using steel round bars, we can help reduce greenhouse gas emissions and combat climate change. Furthermore, steel can be produced using alternative energy sources, such as renewable energy, further reducing carbon emissions. 5. Versatility and weight reduction: Steel round bars are versatile and can be used in various construction applications. Their high strength-to-weight ratio allows for the creation of lightweight structures, reducing the amount of material needed. This not only lowers the environmental impact but also decreases transportation costs and fuel consumption during delivery. 6. Fire-resistant properties: Steel round bars are highly resistant to fire, which can help prevent the spread of flames and reduce damage to structures. This property reduces the need for fire retardant chemicals that may have negative environmental impacts. In conclusion, using steel round bars offers numerous environmental benefits, including recyclability, durability, energy efficiency, reduced carbon emissions, weight reduction, and fire resistance. By opting for steel round bars, we can contribute to a more sustainable and eco-friendly construction industry.

Q:Are steel round bars resistant to impact?: Yes, steel round bars are generally resistant to impact due to their high strength and durability. They can withstand significant force without deforming or breaking, making them suitable for applications where impact resistance is required.

Q:Can steel round bars be used for shafts or axles?: Yes, steel round bars can be used for shafts or axles. Steel round bars are commonly used in various industries, including automotive, machinery, and construction, for their strength, durability, and versatility. They are often chosen for shafts or axles due to their ability to withstand heavy loads, provide reliable support, and resist wear and tear. Steel round bars can be machined and heat-treated to meet specific requirements, making them suitable for use as shafts or axles in various applications where strength and reliability are crucial, such as in vehicles, industrial equipment, and rotating machinery.

Q:What are the advantages of using alloy steel round bars?: Alloy steel round bars offer numerous benefits. Firstly, they possess superior strength and durability, surpassing regular steel bars. This quality is particularly advantageous in industries like construction, automotive, and aerospace, where high strength and toughness are crucial. The inclusion of alloying elements enhances their mechanical properties, making them highly resistant to wear, impact, and corrosion. Moreover, alloy steel round bars exhibit exceptional heat resistance. They can endure high temperatures without compromising their strength, making them suitable for environments like furnaces, boilers, and heat exchangers. This attribute extends their service life and reduces the need for frequent replacements. Another advantage lies in the versatility of alloy steel round bars. They can be easily machined, forged, or welded, providing flexibility in design and manufacturing processes. Their ability to be customized to meet specific requirements makes them suitable for a wide range of applications. Additionally, alloy steel round bars maintain good dimensional stability. Even under extreme conditions, they retain their shape and size, ensuring precise and accurate performance. This characteristic is particularly valuable in industries that demand tight tolerances, such as precision engineering and manufacturing. Lastly, alloy steel round bars prove to be cost-effective in the long term. Although they may have a higher initial cost compared to regular steel bars, their enhanced properties and extended service life result in reduced maintenance and replacement expenses. This makes them a more economical choice over time. In conclusion, the benefits of utilizing alloy steel round bars include superior strength and durability, excellent heat resistance, versatility in machining and fabrication, good dimensional stability, and long-term cost-effectiveness. These advantages make them the preferred option in various industries that require high-performance materials.

1. Manufacturer Overview
Location
Year Established
Annual Output Value
Main Markets
Company Certifications

2. Manufacturer Certificates
a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability
a)Trade Capacity
Nearest Port
Export Percentage
No.of Employees in Trade Department
Language Spoken:
b)Factory Information
Factory Size:
No. of Production Lines
Contract Manufacturing
Product Price Range