Grade 4340 (ASTM A29) Alloy Special Steel Round Bar
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t
- Supply Capability:
- 10000 m.t/month
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Item specifice
Specifications of Round Bar
1. Alloy steel round bar
2. Dia:16mm~250mm
3. Length: 6m, 9m, 12m or as customer’s request
4. Tolerance: Within ±5% for weight; ±2mm for diameter
5. Note: The price can be better is the quantity is good
Equivement Grade
DIN:34CRNIMO
SAE:4340
JIS:SNCM439(SNCM8)
BS:817M40
UNI:40NiCrMo7
Chemical Composition
C | Si | Mn | S | P | Cr | Ni | Cu | Mo |
0.37-0.44 | 0.17-0.37 | 0.50-0.80 | ≤0.025 | ≤0.025 | 0.60-0.90 | 1.25-1.65 | ≤0.025 | 0.15-0.25 |
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Usage and Applications of Round Bar
1. Chinese standard steel bar is often used where large amounts of steel need to be formed, for example as structural steel.
2. And we can use this kind of product on the performance of the mechanical parts if the demand is not very high.
3. Steel round bar is used in construction and a large number of architectural and engineering structures.
Packaging & Delivery of Round Bar
Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)
Delivery Detail: 15~45 days
Trade terms: FOB, CFR, CIF
MOQ: 30 metric tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.
Weight: Theprice invoicing on theoretical weight basis or actual weight basis depends on customer’s request.
Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.
Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.
Production Flow of Round Bar
1. The common processes are preheated forging quenching, dual refinement solution process, cooling quenching and isothermal quenching. We use heat treatment for dual refinement solution process.
2. Material prepare (billet) — heat up — rough rolling — precision rolling — cooling — packing — storage and transportation
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4: What makes stainless steel stainless?
A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.
Q5: Can stainless steel rust?
A5: Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface.
- Q:How does special steel perform in renewable energy applications?
- Various renewable energy applications heavily rely on special steel, which plays a crucial role in their performance and durability. The exceptional properties of special steel, including its high strength, resistance to corrosion, and stability in different temperatures, make it an ideal choice for use in renewable energy technologies. Wind turbines, in particular, benefit greatly from special steel. The tower, rotor blades, and gearbox of wind turbines require materials that can withstand harsh environmental conditions and bear high mechanical loads. Special steel alloys excel in this aspect by offering excellent strength-to-weight ratios, enabling the design of lighter and more efficient turbines. Additionally, their resistance to corrosion ensures a longer lifespan and reduced maintenance needs, ultimately enhancing the reliability and overall performance of wind turbines. In solar power applications, special steel finds its use in the construction of solar panels and their support structures. Solar panels demand frames made of durable materials to withstand external forces and extreme weather conditions. By utilizing special steel, solar panels can be manufactured to be lightweight while maintaining the necessary strength to support the weight of photovoltaic cells. Moreover, the corrosion resistance of special steel ensures the panels remain intact even in harsh environments. Furthermore, special steel is also employed in hydroelectric power production. The corrosive nature of water, coupled with high pressure and temperature conditions, necessitates the use of materials that can withstand such environments. Special steel exhibits excellent resistance against corrosion, erosion, and cavitation, making it an ideal choice for hydroelectric power generation. Its strength and durability ensure efficient operation and the ability to withstand the forces exerted by flowing water. All in all, special steel significantly enhances the reliability, longevity, and efficiency of various renewable energy technologies. Its unique properties make it an essential material in wind turbines, solar panels, and hydroelectric power generation, thereby contributing to the overall progress and sustainability of renewable energy systems.
- Q:How does special steel contribute to the power generation sector?
- Special steel contributes to the power generation sector by offering enhanced strength, durability, and corrosion resistance properties required for critical components such as turbine blades, shafts, and boiler tubes. This high-performance steel ensures efficient power generation by withstanding extreme temperatures and pressures, thereby increasing the overall efficiency and reliability of power plant operations.
- Q:How does special steel contribute to reducing product weight while maintaining strength?
- Special steel contributes to reducing product weight while maintaining strength through its unique properties and composition. Special steel often has a higher strength-to-weight ratio compared to other materials, allowing manufacturers to use less steel without compromising on strength. Additionally, special steel can be engineered to have specific characteristics, such as high tensile strength or corrosion resistance, further enhancing its performance. By utilizing special steel, manufacturers can create lighter products without sacrificing durability, resulting in reduced weight and improved efficiency.
- Q:Can special steel be used in the computer manufacturing industry?
- Yes, special steel can be used in the computer manufacturing industry. Special steel, known for its enhanced strength, durability, and resistance to corrosion, can be utilized in various components of computer manufacturing. This includes using special steel alloys for computer casings, structural frames, heat sinks, and other critical components that require high strength and reliability. The use of special steel in the computer manufacturing industry ensures the longevity and performance of computer systems.
- Q:What are the different methods of surface ion nitriding for special steel?
- Surface ion nitriding of special steel can be achieved through various methods. These methods encompass: 1. Utilizing DC Plasma Nitriding: Employing direct current (DC) plasma to ionize nitrogen gas, a plasma atmosphere is created. By subjecting the special steel to the plasma chamber and applying high voltage, the ions are accelerated towards the steel's surface, resulting in nitriding. 2. Adopting RF Plasma Nitriding: Similar to DC plasma nitriding, RF (Radio Frequency) plasma nitriding employs a radio frequency power supply to generate plasma instead of direct current. This method allows for better control over the nitriding process and can accommodate more intricate geometries. 3. Employing Pulse Plasma Nitriding: By applying short pulses of high voltage to the steel surface, a plasma discharge is created. These pulses are repeated at regular intervals, enabling precise control over the nitriding process. Pulse plasma nitriding is commonly used for steels with sensitive properties that may be affected by prolonged exposure to high temperatures. 4. Combining Plasma Assisted Nitriding: This method combines plasma nitriding with other surface treatment techniques, such as physical vapor deposition (PVD) or chemical vapor deposition (CVD). Initially, the steel is coated with a thin layer of reactive material, followed by nitriding in a plasma atmosphere. This combination enhances the surface properties of the special steel, such as wear resistance or corrosion resistance. 5. Employing Glow Discharge Nitriding: This method involves placing the special steel in a chamber filled with a nitrogen-rich gas, such as ammonia. Applying high voltage creates a glow discharge, which ionizes the gas and generates nitrogen ions that diffuse into the steel's surface. Glow discharge nitriding is commonly employed for small parts or components with complex shapes. It is crucial to consider factors such as desired properties, steel geometry, and application-specific requirements when selecting the most suitable method for surface ion nitriding of special steel.
- Q:How does special steel contribute to the construction of infrastructure projects?
- Special steel plays a crucial role in the construction of infrastructure projects by providing enhanced strength, durability, and resistance to corrosion. It is commonly used in critical structural components such as beams, columns, and reinforcement bars, ensuring the stability and longevity of buildings, bridges, and other infrastructure. Additionally, special steel alloys offer flexibility in design, making it possible to create structures that are lighter and more cost-effective without compromising safety or structural integrity.
- Q:How does tool steel maintain its hardness at high temperatures?
- Tool steel maintains its hardness at high temperatures due to its high carbon content and alloying elements. The high carbon content allows for the formation of carbides, which are extremely hard and stable even at elevated temperatures. Additionally, the alloying elements in tool steel, such as chromium, tungsten, and molybdenum, form secondary carbides that further enhance the steel's hardness and heat resistance. These carbides act as strengthening agents, preventing the steel from losing its hardness and maintaining its performance even under high-temperature conditions.
- Q:What are the non-destructive testing methods used for special steel?
- There are several non-destructive testing (NDT) methods that are commonly used for special steel. These methods are designed to detect flaws or defects in the steel without causing any damage to the material. One of the most widely used NDT methods for special steel is ultrasonic testing. This technique involves sending high-frequency sound waves through the steel and analyzing the echoes that are reflected back. By measuring the time it takes for the sound waves to travel through the steel and return, technicians can determine the thickness, density, and internal structure of the material. Ultrasonic testing is particularly effective at detecting cracks, voids, or inclusions in the steel. Another commonly used NDT method for special steel is magnetic particle testing. This technique involves applying a magnetic field to the surface of the steel and then coating it with a magnetic powder. Any defects or irregularities in the steel will create magnetic flux leakage, causing the magnetic particles to cluster and form visible indications. This method is particularly effective at detecting surface cracks or discontinuities in the steel. Liquid penetrant testing is another NDT method that is often used for special steel. This technique involves applying a liquid dye or fluorescent material to the surface of the steel. The dye penetrates any surface cracks or defects, and after a specified dwell time, excess dye is removed. A developer is then applied, which draws out the dye from any flaws, making them visible under UV light. This method is effective at detecting surface discontinuities and is commonly used in the aerospace and automotive industries. Radiographic testing is another NDT method that can be used for special steel. This technique involves exposing the steel to X-rays or gamma rays and capturing the resulting image on a film or digital detector. By analyzing the radiographic image, technicians can detect internal flaws such as cracks, voids, or inclusions in the steel. This method is particularly useful for thicker sections of steel or when access to the material is limited. In conclusion, non-destructive testing methods such as ultrasonic testing, magnetic particle testing, liquid penetrant testing, and radiographic testing are commonly used for special steel. These methods allow for the detection of flaws or defects in the steel without causing any damage to the material, ensuring its integrity and reliability.
- Q:What are the different cutting techniques used for special steel?
- Some of the different cutting techniques used for special steel include abrasive cutting, laser cutting, waterjet cutting, and flame cutting.
- Q:Can special steel be used for manufacturing tools?
- Yes, special steel can definitely be used for manufacturing tools. Special steel refers to a specific type of steel that is carefully engineered and designed to possess certain properties and characteristics that make it suitable for specific applications. In the case of manufacturing tools, special steel is often preferred due to its exceptional strength, hardness, and durability. These properties enable tools made from special steel to withstand high levels of stress, wear, and impact, making them ideal for demanding applications such as cutting, drilling, shaping, and machining. Additionally, special steel can also exhibit excellent heat resistance, corrosion resistance, and dimensional stability, further enhancing its suitability for tool manufacturing. Overall, the use of special steel in tool production ensures the creation of high-quality, long-lasting, and efficient tools that can effectively perform various tasks in different industries.
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Grade 4340 (ASTM A29) Alloy Special Steel Round Bar
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t
- Supply Capability:
- 10000 m.t/month
OKorder Service Pledge
OKorder Financial Service
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