Special Steel Forged Steel 709M40 Round Steel Bar

Special Steel Forged Steel 709M40 Round Steel Bar System 1

Special Steel Forged Steel 709M40 Round Steel 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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Product Information

1 Chemical Composition:

C	Si	Mn	P	S	Cr	Mo
0.36-0.44	0.10-0.35	0.70-1.00	≤0.035	≤0.04	0.90-1.50	0.20-0.35

2 Brief Introduction:

Dimension	13-350mm
Length	2-13m or as per your request
Delivery condition	Hot rolled
Heat Treatment	Normalizing, Annealing, Quenching
Packing	Standard seaworthy packing or according to your requirements

3 Mechanical Property:

Yield Strength (MPa)	≥417.1
Tensile Strength (MPa)	≥655.0
Elongation (%)	≥25.7
Hardness (HB)	≤197
Reduction in Area (%)	≥56.9
AKV (J)	≥54.5

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Special Steel Forged Steel 709M40 Round Steel Bar

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Special Steel Forged Steel 709M40 Round Steel Bar

Shipping

1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

Delivery Time: 3-7 days for samples; 5-25 days for batch goods.

Payment Terms

1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.

2.MOQ: 1pcs

3.Warranty : 3 years

4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)

2)as customer's requirement

Why choose us?

(1) The leading exporter in China special steel industry.

(2) Large stocks for various sizes, fast delivery date.

(3) Good business relationship with China famous factories.

(4) More than 7 years steel exporting experience.

(5) Good after-sales service guarantee.

Q:What are the main factors affecting the formability of special steel?: The formability of special steel, like any other type of steel, is influenced by several factors. These factors include the composition of the steel, its microstructure, mechanical properties, temperature, and strain rate. The composition of special steel plays a crucial role in its formability. The presence of alloying elements, such as chromium, nickel, molybdenum, and vanadium, can significantly affect the steel's ability to be formed. These elements can alter the steel's strength, ductility, and resistance to deformation. The microstructure of special steel is another key factor affecting its formability. Fine-grained steels tend to have better formability compared to coarse-grained steels. The presence of non-metallic inclusions, such as sulfides and oxides, can also influence formability by acting as stress concentrators and promoting crack formation. The mechanical properties of special steel, such as yield strength, tensile strength, and elongation, directly impact its formability. Steels with higher yield strength are generally more difficult to form, as they require greater force to deform. However, steels with high elongation can undergo larger plastic deformation before failure, making them more formable. Temperature is another critical factor affecting the formability of special steel. At elevated temperatures, the steel becomes more ductile and easier to deform. This is due to the reduction in yield strength and increased mobility of dislocations within the crystal structure. However, excessively high temperatures can also lead to grain growth, which negatively impacts formability. The strain rate, or the rate at which deformation is applied to the steel, also affects formability. Higher strain rates can cause strain hardening, where the steel becomes stronger and less formable. Conversely, lower strain rates allow for greater plastic deformation and improved formability. In conclusion, the formability of special steel is influenced by its composition, microstructure, mechanical properties, temperature, and strain rate. Understanding and optimizing these factors is essential for achieving the desired formability and shaping capabilities of special steel in various applications.

Q:How does special steel contribute to the power transmission sector?: The power transmission sector relies heavily on special steel due to its exceptional properties and performance characteristics. Special steel is highly valued for its strength and resilience, making it an ideal material for manufacturing various components of power transmission systems. For example, transmission towers require special steel for their stability and durability, even in extreme weather conditions. Additionally, special steel's resistance to corrosion is particularly advantageous in the power transmission sector. Power transmission equipment often faces harsh environments, such as high humidity, chemical pollutants, and saltwater exposure, which can speed up corrosion. By using special steel in the manufacturing process, the risk of corrosion-related failures is significantly reduced, ensuring a reliable and uninterrupted power transmission. Furthermore, special steel's excellent electrical conductivity makes it a perfect choice for conductors and cables used in power transmission. Efficient transfer of electrical energy is crucial to minimize power losses and optimize the transmission process. Special steel conductors offer low resistance to the flow of electricity, enabling efficient power transmission over long distances. Moreover, special steel is also employed in the production of transformers and other electrical equipment used in power transmission. The magnetic properties of special steel make it an excellent material for transformer cores, facilitating efficient energy conversion and minimizing energy losses during transmission. In summary, special steel greatly contributes to the power transmission sector by providing strength, corrosion resistance, electrical conductivity, and magnetic properties. These properties ensure the reliability, efficiency, and longevity of power transmission systems, ultimately supporting the uninterrupted supply of electricity to industries, businesses, and households.

Q:How does special steel contribute to the safety of infrastructure?: The safety of infrastructure is greatly enhanced by special steel in several ways. Firstly, it possesses exceptional strength and durability, allowing for the construction of strong and resilient structures. Bridges, buildings, and tunnels can rely on special steel to withstand heavy traffic, strong winds, seismic activities, and even potential terrorist attacks. Furthermore, special steel exhibits excellent resistance to corrosion, making it ideal for infrastructure projects exposed to harsh environmental conditions. By preventing rust and decay, it prolongs the lifespan of structures and reduces the need for costly maintenance and repairs. This is particularly crucial in coastal areas, where saltwater can cause significant damage. Moreover, special steel has outstanding fire resistance due to its high melting point. This characteristic ensures that structures maintain their structural integrity even under extreme temperatures. In the event of a fire, this feature allows for additional time for evacuation and emergency response, thereby enhancing overall safety. Additionally, special steel enables innovative design solutions, further contributing to infrastructure safety. Its versatility allows for the creation of complex and efficient structures such as long-span bridges and skyscrapers. These designs often incorporate special steel components, such as high-strength beams or columns, which enhance overall stability and safety. In conclusion, special steel is an essential material for ensuring the safety and reliability of infrastructure. Its exceptional strength, corrosion resistance, fire resistance, and design flexibility enable engineers and architects to create structures capable of withstanding various challenges. By utilizing special steel in construction projects, lives and well-being of people who utilize these structures can be effectively protected.

Q:What are the requirements for special steel used in high-performance racing cars?: In order to meet the demands of the racing environment, the requirements for special steel used in high-performance racing cars are quite strict. Some of the main requirements include: 1. Exceptional strength and durability: The special steel must possess outstanding strength and durability to endure the extreme loads and stresses encountered during high-speed racing. It must have a high tensile strength and the ability to withstand fatigue and deformation under intense conditions. 2. Lightweight: Racing cars require lightweight materials to achieve optimal performance and maneuverability on the track. The special steel used in high-performance racing cars must have a high strength-to-weight ratio, allowing for reduced weight without compromising strength or safety. 3. Excellent heat resistance: The steel must have excellent heat resistance to withstand the high temperatures generated by high-performance engines, braking systems, and exhaust systems. It must maintain its structural integrity and mechanical properties even under extreme heat conditions. 4. High corrosion resistance: Racing cars are often exposed to harsh environments, including moisture, salt, and other corrosive elements. Therefore, the special steel used in racing cars should have high corrosion resistance to prevent rust and degradation, ensuring the longevity and reliability of the components. 5. Easy machinability: The steel should be easily machinable, facilitating the precise manufacturing and fabrication of complex components. This ensures that the parts can be produced accurately and efficiently, resulting in superior performance and reliability. 6. Good weldability: The special steel used in racing cars should have good weldability, as welding is often required for the assembly of various components. It should be able to withstand the heat generated during welding without experiencing significant loss in strength or other mechanical properties. In summary, the requirements for special steel used in high-performance racing cars revolve around strength, lightweight, heat resistance, corrosion resistance, machinability, and weldability. Meeting these requirements is essential to ensure the safety, performance, and success of racing cars on the track.

Q:How does special steel contribute to the power generation machinery industry?: Special steel plays a crucial role in the power generation machinery industry by contributing to the efficiency, reliability, and durability of power generation equipment. Firstly, special steel possesses exceptional mechanical properties, such as high strength, toughness, and temperature resistance. These properties make it ideal for manufacturing key components of power generation machinery, such as turbines, generators, and boilers. The superior strength and toughness of special steel enable these components to withstand high pressures, extreme temperatures, and harsh operating conditions, ensuring the safe and efficient operation of power plants. Moreover, special steel alloys can be specifically designed to resist corrosion, erosion, and wear, which are common challenges faced by power generation equipment. Corrosion can be caused by the chemical reactions between metals and the environment, while erosion and wear result from the high-speed flow of steam, water, or gases. By utilizing corrosion-resistant and wear-resistant special steel, power generation machinery can operate for longer periods without significant degradation, reducing maintenance requirements and downtime. Another significant contribution of special steel to the power generation machinery industry is its ability to retain magnetic properties at elevated temperatures. This property is crucial for electrical generators, as it ensures optimal performance and efficiency. Special steel with excellent magnetic properties enables generators to produce electricity with minimal energy losses due to heat, resulting in higher power output and reduced energy consumption. Furthermore, the design flexibility of special steel allows for the production of customized components, tailored to the specific requirements of different power generation technologies. For instance, in nuclear power plants, special steel alloys with high resistance to radiation and neutron embrittlement are used for the construction of reactor pressure vessels and other critical components. In renewable energy systems like wind turbines, special steel with superior fatigue resistance is utilized to withstand the cyclic loading experienced by turbine blades. In summary, special steel significantly contributes to the power generation machinery industry by enhancing the efficiency, reliability, and durability of power generation equipment. Its exceptional mechanical properties, corrosion resistance, wear resistance, magnetic properties, and design flexibility make it indispensable for manufacturing components that can withstand extreme conditions and ensure the continuous and efficient generation of electricity.

Q:What are the different marine grades of special steel?: There are several different marine grades of special steel that are specifically designed to withstand the harsh conditions of marine environments. These grades are typically categorized based on their corrosion resistance and mechanical properties. One of the most commonly used marine grades of special steel is 316 stainless steel. It contains a higher percentage of molybdenum and nickel, which enhances its resistance to corrosion from saltwater and other harsh chemicals. This grade is often used for marine hardware, such as bolts, nuts, and screws, as well as for marine structures and equipment. Another marine grade of special steel is 2205 duplex stainless steel. This grade has a higher strength and better corrosion resistance compared to 316 stainless steel. It is often used in marine applications that require high strength and durability, such as propeller shafts, offshore structures, and pressure vessels. There is also 5083 aluminum-magnesium alloy, which is commonly used in marine applications where weight is a concern. This grade of special steel offers excellent corrosion resistance and high strength, making it suitable for boat hulls, superstructures, and other lightweight marine components. Additionally, there are various high-strength low-alloy (HSLA) steels that are used in marine applications. These steels are specifically designed to provide superior strength and toughness while also offering good corrosion resistance. They are often used for shipbuilding, offshore drilling rigs, and other marine structures that require high strength and durability. Overall, the different marine grades of special steel provide a range of options for various marine applications. The choice of grade depends on the specific requirements of the project, including the level of corrosion resistance, strength, and weight considerations.

Q:How does special steel enhance the durability of products?: Special steel enhances the durability of products by providing exceptional strength, resistance to corrosion, and wear and tear. Its unique composition and manufacturing processes result in a material that can withstand high pressures, extreme temperatures, and harsh environments, prolonging the lifespan of various products and reducing the need for frequent repairs or replacements.

Q:What are the different methods of surface ion nitriding for special steel?: There are several methods of surface ion nitriding for special steel, including traditional gas nitriding, plasma nitriding, and ion nitriding. Each method involves introducing nitrogen ions into the surface of the steel to improve its hardness, wear resistance, and corrosion resistance. Gas nitriding involves exposing the steel to ammonia gas at high temperatures, while plasma nitriding uses a low-pressure plasma to generate nitrogen ions. Ion nitriding, on the other hand, utilizes a high-voltage electrical discharge to create the nitrogen ions. Overall, these methods offer various options for enhancing the surface properties of special steel, depending on the specific requirements and desired outcomes.

Q:How does special steel perform in abrasive wear conditions?: Special steel performs well in abrasive wear conditions due to its high hardness and toughness. It has excellent resistance to abrasion, which allows it to withstand the rubbing, scraping, and grinding that occurs in abrasive environments. The unique composition and heat treatment of special steel enhance its ability to resist wear and maintain its structural integrity, making it an ideal choice for applications where abrasive wear is a concern.

Q:How does special steel compare to stainless steel?: Special steel and stainless steel differ in terms of their composition and properties. Special steel refers to a broad category of high-performance steels that possess unique characteristics, such as increased strength, toughness, heat resistance, or corrosion resistance. On the other hand, stainless steel is a specific type of steel alloy that is highly resistant to corrosion and staining. While special steel can exhibit superior mechanical properties, stainless steel excels in its resistance to rust and oxidation. Ultimately, the choice between the two depends on the specific application and the desired properties required.

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