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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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:Can special steel be used for electrical applications?
- Yes, special steel can be used for electrical applications. Special steel alloys, such as stainless steel or electrical-grade steels, are often used in electrical applications due to their excellent electrical conductivity, resistance to corrosion, and high strength properties. These steels are commonly utilized in the manufacturing of electrical components, wiring, transformers, and various electrical equipment.
- Q:Is special steel suitable for manufacturing cutting tools?
- Yes, special steel is highly suitable for manufacturing cutting tools. Special steel refers to steel that has been specifically designed and processed to possess exceptional properties such as high hardness, toughness, and wear resistance. These characteristics make special steel an ideal choice for cutting tools as they enable the tools to withstand the high stresses and pressures involved in cutting operations. The hardness of special steel ensures that cutting tools can maintain their sharpness for a longer period of time, leading to improved cutting performance and efficiency. Additionally, the toughness of special steel allows cutting tools to resist chipping, cracking, or breaking during use, enhancing their durability and longevity. Furthermore, the wear resistance of special steel ensures that cutting tools can withstand the abrasive forces encountered during cutting operations without significant loss of material or deterioration. This helps to maintain the accuracy and precision of the cutting tools over time. Moreover, special steel can be tailored to meet specific requirements for different cutting applications. For example, high-speed steel (HSS) is a type of special steel that is particularly suitable for cutting tools used in high-speed machining operations. HSS possesses excellent heat resistance and can retain its hardness even at elevated temperatures. In conclusion, special steel is highly suitable for manufacturing cutting tools due to its hardness, toughness, wear resistance, and ability to be customized for specific cutting applications. These properties enable cutting tools to deliver optimal cutting performance, durability, and accuracy.
- Q:What are the different magnetic grades of special steel?
- There are several different magnetic grades of special steel that are commonly used in various applications. Some of the most common magnetic grades include: 1. Soft Magnetic Materials: These grades of special steel are designed to have high magnetic permeability and low coercivity. They are used in applications where a high magnetic induction is required, such as in transformers, electric motors, and magnetic cores for electrical devices. 2. Martensitic Stainless Steels: These grades of special steel have a high magnetic permeability and are magnetic in their hardened state. They are commonly used in applications such as cutlery, tools, and certain automotive components. 3. Ferritic Stainless Steels: These grades of special steel have a lower magnetic permeability compared to martensitic stainless steels, but they are still magnetic. They are commonly used in applications such as automotive exhaust systems, decorative trim, and appliances. 4. Duplex Stainless Steels: These grades of special steel possess a mixed microstructure of austenite and ferrite, resulting in a magnetic response. They are known for their high corrosion resistance and are used in applications where both strength and corrosion resistance are required, such as in chemical processing equipment and offshore oil and gas platforms. 5. Austenitic Stainless Steels: These grades of special steel are non-magnetic in their annealed state. However, they can exhibit slight magnetism when cold worked or if they contain certain alloying elements. Austenitic stainless steels are widely used in various applications, such as in food processing equipment, architectural structures, and medical devices. It's important to note that the presence or absence of magnetism in special steel grades can vary depending on factors such as composition, heat treatment, and processing. Therefore, it is crucial to consider the specific requirements of a particular application when selecting the appropriate magnetic grade of special steel.
- Q:What industries commonly use special steel?
- Special steel, known as alloy steel as well, finds extensive use in diverse industries owing to its exceptional properties and performance characteristics. Several industries frequently employ special steel, including: 1. Automotive Industry: Special steel is extensively utilized in manufacturing automobile components such as crankshafts, camshafts, gears, and axles. Its exceptional strength, durability, and excellent heat resistance make it suitable for enduring the demanding conditions of the automotive sector. 2. Aerospace Industry: The aerospace industry relies on special steel to manufacture critical components like turbine blades, landing gear, and structural parts. Its ability to withstand high temperatures and maintain structural integrity under extreme conditions is vital for aerospace applications. 3. Oil and Gas Industry: In the oil and gas sector, special steel is crucial for applications like drill bits, valves, pipelines, and offshore platform components. Its corrosion resistance, high strength, and ability to withstand extreme temperatures and pressures make it suitable for these challenging environments. 4. Construction Industry: Special steel serves the construction industry in fabricating structural components, reinforcement bars, and high-rise building frameworks. Its high tensile strength, toughness, and resistance to wear and tear ensure the safety and stability of the structures. 5. Tool and Die Industry: The tool and die sector widely employs special steel in manufacturing cutting tools, molds, dies, and various machine components. Its capability to retain sharpness, resist deformation, and withstand high pressures and temperatures make it indispensable for these applications. 6. Energy Industry: Power generation plants, including nuclear, thermal, and renewable energy facilities, extensively utilize special steel. It is employed in manufacturing turbines, boilers, heat exchangers, and other critical components, thanks to its high temperature and corrosion resistance properties. 7. Medical Industry: In the medical field, special steel plays a crucial role, particularly in surgical instruments and implants. Its biocompatibility, strength, and corrosion resistance make it suitable for applications like joint replacements, dental instruments, and surgical cutting tools. 8. Manufacturing Industry: Various manufacturing processes like machining, forging, and casting widely rely on special steel. It is employed in the production of machine tools, industrial equipment, and heavy machinery components due to its high strength, toughness, and versatility. These examples represent just a fraction of the industries that commonly employ special steel. Its unique properties make it an indispensable material for a wide range of applications where strength, durability, heat resistance, and corrosion resistance are critical factors.
- Q:Does special steel require special machining techniques?
- Yes, special steel often requires special machining techniques due to its unique properties and characteristics. It is typically harder, tougher, and more heat resistant compared to regular steel, making it more challenging to cut, shape, and form. Special machining techniques such as using high-speed tools, specific tool geometries, and advanced coolant systems may be necessary to achieve desired results and maintain the integrity of the special steel.
- Q:How does surface treatment affect the performance of special steel?
- The performance of special steel is greatly enhanced by surface treatment, which serves the essential purpose of altering the steel's surface properties to meet specific requirements and improve its performance in various applications. One notable effect of surface treatment on special steel is the increased resistance to corrosion. Coatings or treatments such as galvanization, electroplating, or passivation are applied to make the steel's surface more resilient against the damaging effects of moisture, chemicals, and other corrosive agents. This is particularly crucial in industries like construction, automotive, or marine, where steel is subjected to harsh environments. Surface treatment also has an impact on the wear resistance of special steel. Through processes like carburizing, nitriding, or boriding, a thin layer of hard and wear-resistant material is formed on the surface of the steel. This significantly enhances its ability to withstand friction, abrasion, and mechanical stress, making it suitable for applications involving heavy machinery, cutting tools, or bearings. Moreover, surface treatment can enhance the aesthetic appeal of special steel. Techniques such as polishing, grinding, or coating can be employed to improve the appearance of the steel, making it more visually pleasing for architectural or decorative purposes. Another crucial aspect affected by surface treatment is the adhesion properties of the steel. By modifying the surface through processes like shot peening or surface etching, the steel becomes more receptive to adhesives, paints, or coatings. This improves the bond strength between the steel and other materials, making it suitable for applications where adhesion is critical, such as in the aerospace or electronics industries. To summarize, surface treatment has a significant impact on the performance of special steel. It enhances corrosion resistance, wear resistance, adhesion properties, and aesthetic appeal. Manufacturers can maximize the steel's performance and extend its lifespan by selecting the appropriate surface treatment techniques to tailor its surface properties to meet specific application requirements.
- Q:What are the different surface treatment methods used for special steel?
- Some of the different surface treatment methods used for special steel include galvanizing, electroplating, powder coating, heat treatment, and nitriding. Galvanizing involves applying a protective zinc coating to prevent corrosion. Electroplating uses an electrical current to deposit a layer of metal onto the surface of the steel, improving its appearance and corrosion resistance. Powder coating involves spraying a dry powder onto the steel and then baking it to create a durable and attractive finish. Heat treatment involves subjecting the steel to high temperatures and then cooling it rapidly to alter its properties, such as hardness or toughness. Nitriding is a process of diffusing nitrogen into the surface of the steel to improve its hardness, wear resistance, and corrosion resistance. These surface treatment methods are used to enhance the performance, durability, and aesthetic appeal of special steel.
- Q:What are the different construction grades of special steel?
- There are several different construction grades of special steel that are used in various industries and applications. These grades are specifically designed to provide superior strength, durability, and resistance to corrosion and other environmental factors. Some of the commonly known construction grades of special steel include: 1. Mild Steel: This is the most basic and widely used grade of special steel in construction. It has a low carbon content, making it easy to work with and weld. Mild steel is suitable for applications that require moderate strength and durability. 2. High-Strength Low-Alloy (HSLA) Steel: HSLA steel is a type of special steel that contains small amounts of alloying elements, such as copper, nickel, and vanadium. This grade offers higher strength and improved formability compared to mild steel. It is commonly used in structural applications where a higher strength-to-weight ratio is required. 3. Weathering Steel: Also known as Cor-Ten steel, weathering steel is a special grade that forms a protective layer of rust when exposed to the elements. This layer acts as a barrier against further corrosion, making it ideal for outdoor structures. Weathering steel is commonly used in bridges, buildings, and other architectural applications. 4. Stainless Steel: Stainless steel is a corrosion-resistant alloy that contains a minimum of 10.5% chromium. It offers excellent resistance to corrosion, heat, and chemicals, making it suitable for a wide range of construction applications. Stainless steel is commonly used in building facades, roofing, and structural components. 5. Tool Steel: Tool steel is a special grade that is specifically designed for making tools, dies, and molds. It has high hardness, wear resistance, and toughness properties, making it suitable for applications that require cutting, shaping, and forming of materials. 6. Alloy Steel: Alloy steel is a special grade that contains additional alloying elements, such as manganese, silicon, nickel, and chromium. This grade offers improved strength, toughness, and wear resistance compared to carbon steel. Alloy steel is commonly used in the construction of machinery, equipment, and components subjected to high stress and wear. These are just a few examples of the different construction grades of special steel. Each grade has its own unique properties and is chosen based on the specific requirements of the application.
- Q:How does special steel perform under high temperatures?
- Special steel, also known as high-temperature steel, exhibits excellent performance under high temperatures. It maintains its strength, hardness, and resistance to deformation, making it suitable for various applications in extreme heat conditions. Additionally, special steel can withstand thermal stress and oxidation, ensuring its durability and reliability in high-temperature environments.
- Q:How is mold steel used in injection molding?
- Mold steel is used in injection molding to create the molds or tooling that are used to produce plastic parts. It is a durable and heat-resistant material that can withstand the high temperatures and pressures involved in the injection molding process. The mold steel is shaped into the desired mold design and then used to form the plastic material into the desired shape through injection molding. This allows for the mass production of plastic parts with high accuracy and repeatability.
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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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