Grade 4340 (ASTM A29) Alloy Special Steel Round Bar
- Ref Price:
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- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 m.t
- Supply Capability:
- 10000 m.t/month
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Specification
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: What are the applications of special steel in the aerospace sector?
- Due to its exceptional properties and capabilities, special steel finds numerous applications in the aerospace sector. Firstly, it is utilized in the manufacturing of aircraft engines. Special steel's high strength and temperature resistance make it an ideal choice for components such as turbine blades and discs, which experience extreme heat and stress during operation. Moreover, special steel provides excellent corrosion resistance, ensuring the durability and reliability of vital engine parts. Another important application of special steel in the aerospace sector involves constructing aircraft structures. Special steel alloys are employed to fabricate landing gear, wing components, and other structural elements. The high strength-to-weight ratio of special steel enables the production of lightweight yet sturdy structures, contributing to fuel efficiency and overall performance. Special steel is also essential in producing aerospace fasteners, including bolts, nuts, and screws that secure various aircraft components together. Special steel's exceptional mechanical properties, fatigue resistance, and vibration resistance make it an ideal material for fasteners, ensuring the integrity and safety of aircraft assemblies. Furthermore, special steel is utilized in aerospace tooling and equipment. Tools used in the manufacturing process, such as cutting tools and molds, are often made from special steel. Its high hardness and wear resistance enable efficient and precise machining of aerospace components. Additionally, special steel is employed in the production of specialized equipment, such as test rigs, calibration devices, and ground support equipment, which are crucial for aerospace operations and maintenance. In conclusion, special steel plays a crucial role in the aerospace sector, contributing to the overall safety, performance, and reliability of aerospace systems. Its use in aircraft engines, structures, fasteners, and tooling is indispensable for the demanding and critical applications within the aerospace industry, thanks to its unique properties.
- Q: What are the main characteristics of high-speed steel?
- High-speed steel (HSS) possesses exceptional properties that make it widely used in machining applications. HSS is characterized by its superior hardness, achieved through the addition of alloying elements such as tungsten, molybdenum, cobalt, vanadium, and chromium. This hardness allows HSS to withstand high temperatures and resist wear. Another notable characteristic of high-speed steel is its excellent heat resistance, enabling it to maintain its hardness and strength even at elevated temperatures. This is crucial in applications where the tool needs to endure high cutting speeds and generate significant amounts of heat. HSS also demonstrates good toughness, resisting cracking and chipping under heavy loads or impact. This ensures the tool's ability to withstand demanding cutting conditions without premature failure. Furthermore, high-speed steel exhibits high wear resistance, making it suitable for cutting, drilling, and milling operations. It retains its sharpness and performance even with prolonged usage, resulting in extended tool life. High-speed steel is highly versatile and can be used for cutting, shaping, and forming various materials such as metals, plastics, and wood. Its versatility makes it a popular choice in industries like manufacturing, automotive, aerospace, and construction. Additionally, HSS can be easily machined and shaped into different tool designs, allowing for customization and optimization based on specific applications. This makes it a preferred material for manufacturing cutting tools like drills, end mills, taps, and saw blades. Compared to other high-performance tool materials like carbide, high-speed steel is relatively more cost-effective. It strikes a balance between performance and affordability, making it a cost-efficient choice for many machining applications. In conclusion, high-speed steel is highly valued for its exceptional hardness, heat resistance, toughness, wear resistance, versatility, ease of machining, and cost-effectiveness. These characteristics make it a preferred material for a wide range of cutting tools, ensuring efficient and reliable machining operations.
- Q: What are the properties of nickel-based alloys?
- Nickel-based alloys possess several key properties including high corrosion resistance, excellent heat resistance, good mechanical strength, and a combination of high toughness and durability. They also exhibit good electrical and thermal conductivity, making them suitable for various applications in industries such as aerospace, chemical processing, and power generation. Additionally, nickel-based alloys have the ability to maintain their properties at elevated temperatures, making them ideal for use in extreme environments.
- Q: What is the difference between general steel and special steel?
- Pu steel: full name ordinary steel, mostly with plates, profiles and wire form. Ordinary steel is the basic material of the earliest, the largest amount of use in industry, widely used in architectural structure, bridge components, hull structure, transportation, machinery manufacturing, agriculture, textile, defense industry, metal products, food industry, household appliances and other various departments of the national economy.
- Q: What is the significance of tensile strength in special steel?
- Tensile strength is of great significance in special steel because it determines the steel's ability to withstand stretching or pulling forces without breaking or deforming. This property is crucial in various industries, especially in manufacturing and construction, where high tensile strength is required for structural integrity and safety. Special steel with superior tensile strength can withstand heavy loads, resist impacts, and provide durability, making it highly sought after in applications such as building infrastructure, automotive manufacturing, and aerospace engineering.
- Q: How is special steel recycled or disposed of?
- Special steel, also known as alloy steel, is a valuable and highly sought-after material due to its unique properties and applications. When it comes to recycling or disposing of special steel, several methods can be employed depending on the condition and quality of the material. Recycling is the preferred and most common method for dealing with special steel. The recycling process involves collecting, sorting, and melting down the steel scrap to be reused in the production of new steel products. This process helps conserve natural resources, reduce energy consumption, and minimize waste generation. The first step in recycling special steel is the collection of scrap or end-of-life products that contain this material. These sources can include discarded machinery, automotive parts, construction materials, and even old appliances. Once collected, the steel is sorted and separated from other materials, such as plastic, rubber, or non-ferrous metals, using various techniques like magnetic separation, eddy current separation, or manual sorting. After sorting, the steel scrap is sent to a specialized recycling facility, commonly known as a steel mill or foundry. Here, the scrap is melted down in large furnaces at extremely high temperatures. During this process, impurities and contaminants are removed, and alloying elements can be added to achieve the desired composition and properties of the steel. Once the steel has been melted and purified, it is cast into various forms such as ingots, billets, or slabs, which can then be used to manufacture new steel products. These products may include pipes, bars, plates, or even new machine parts, depending on the specific requirements of the industry. As for disposal, special steel should be considered a valuable resource and not simply thrown away as waste. However, in cases where the steel is damaged beyond repair or contains hazardous materials, proper disposal methods must be followed. This typically involves consulting with specialized waste management companies that can handle the safe and environmentally friendly disposal of such materials. In conclusion, special steel is primarily recycled due to its high value and the various benefits associated with recycling. Through the collection, sorting, and melting processes, special steel can be transformed into new products while conserving resources and minimizing waste. Proper disposal methods are only necessary in exceptional cases where recycling is not feasible or when dealing with damaged or hazardous materials.
- Q: What are the different methods of joining special steel components?
- There are several methods of joining special steel components, each with its own advantages and applications. Some of the most common methods include welding, brazing, soldering, and mechanical fastening. 1. Welding: Welding is one of the most widely used methods for joining special steel components. It involves melting the base metals and adding a filler material to create a strong bond. Different welding techniques, such as arc welding, gas welding, or laser welding, can be used depending on the specific requirements and properties of the steel components. 2. Brazing: Brazing is a joining process that uses a filler material with a lower melting point than the base metals. The filler material is heated and distributed between the components, creating a strong bond when it solidifies. Brazing is often used for high-temperature applications and can be done with a torch, furnace, or induction heating. 3. Soldering: Soldering is similar to brazing but uses a lower melting point filler material called solder. It is commonly used for electrical and electronic applications, as well as for joining small or delicate steel components. Soldering requires less heat and can be done with a soldering iron or a hot air gun. 4. Mechanical Fastening: Mechanical fastening involves joining components using mechanical means such as screws, bolts, nuts, or rivets. This method is often used when disassembly or reassembly is required, as it allows for easy removal and replacement of components. Mechanical fastening is suitable for applications where a strong and reliable joint is needed but welding or brazing may not be feasible. 5. Adhesive Bonding: Adhesive bonding is another method used for joining special steel components. It involves applying an adhesive material to the mating surfaces and allowing it to cure or harden, creating a strong bond. Adhesive bonding is often used when a continuous joint is required or when joining dissimilar materials. It is also advantageous for applications that require vibration damping or sealing. Each method of joining special steel components has its own strengths and limitations, and the selection of the appropriate method depends on factors such as the specific requirements of the application, the properties of the steel components, and the desired strength and durability of the joint.
- Q: What are the different tempering techniques used for special steel?
- Some of the different tempering techniques used for special steel include air tempering, oil tempering, water tempering, and salt bath tempering.
- Q: How does special steel contribute to the hardness of products?
- Special steel contributes to the hardness of products through its unique composition and manufacturing processes. Unlike regular steel, special steel is alloyed with additional elements such as chromium, nickel, and manganese, which enhance its strength and durability. These alloying elements form solid solutions within the steel matrix, creating a more rigid and dense structure. The presence of these alloying elements in special steel allows for the formation of various microstructures, such as fine-grained structures or martensitic structures, which significantly increase the hardness of the steel. Moreover, special steel often undergoes heat treatment processes like quenching and tempering, which further refine its microstructure and improve its hardness. Additionally, the manufacturing processes used for special steel, such as hot rolling or cold working, can also contribute to its hardness. These processes deform the steel, aligning its grain structure and reducing any defects or impurities present, leading to a more uniform and harder material. The hardness of special steel is crucial in various industries where strength and resistance to wear and deformation are essential. For example, in the automotive industry, special steel is used to manufacture components like engine parts, gears, and axles, which require high hardness to withstand the demanding conditions and loads they experience. Similarly, in the construction industry, special steel is used for producing tools, cutting blades, and reinforcement bars, where hardness is crucial for longevity and performance. In summary, special steel contributes to the hardness of products through its unique alloying elements, manufacturing processes, and heat treatments. Its ability to form microstructures and its resistance to deformation make it an ideal material for applications where hardness is essential for performance and durability.
- Q: How does special steel perform in terms of thermal expansion?
- Special steel typically performs well in terms of thermal expansion. It has a low coefficient of thermal expansion, meaning it expands and contracts less with temperature changes compared to other types of steel. This makes it more dimensionally stable and less prone to warping or distortion when exposed to heat or cold.
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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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