Prime Steel Billet Q275, 20MnSi, 5SP，for very good price
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 m.t.
- Supply Capability:
- 20000 m.t./month
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STEEL BILLET
1.Brief description
Steel billet(ingot) by cogging or breakdown of semi-finished products, is the raw material of all kinds of steel mill. Billet section of square, round, flat, rectangular and abnormity of several kinds of, mainly related to the shape of rolled products.
2.Features
Rectangular billet continuous casting billet and mainly general carbon steel, low carbon low silicon cold-rolled material, high quality carbon structural steel, high strength low alloy steel, special steel, etc.
The billet is mainly divided into two kinds from the shape:
Slab: cross section width and height of the ratio of the larger, mainly used for rolling plate.
Billet: equal cross section width and height, or a huge difference, mainly used for rolling steel, wire rod. ,
Steel billets have distinct characteristics as compared with already furnished steel bars and products. Billets have a specific grain structure, which enables the metal to be processed more intricately. Steel billets are also known for their malleability and ductility, especially when exposed to varying temperatures during shaping and molding.
3.Processing
Steel billets are considered fresh and raw, and they must undergo a series of manufacturing processes before they can be used for various purposes. Billets are made by means of freezing molten liquid, and are later exposed to extremely low temperatures in order to allow the metal to take shape and solidify in chemical structure. The temperature manipulates the metal's physical properties, and tones its strength and durability. The subsequent processes provide the metal's curved mold design so that it can fit the allotted space provided by other machines, which complete the finishing procedures.
4.Pictures
5.Usage
Billets, or ingots (as they sometimes referred to), are not of practical use until they have been formed into more functional shapes and sizes. While they have already been put in the furnace, they still require a series of shaping and molding procedures such as hot and cold working, milling and cutting before they are sold in hardware stores, or used for different applications. The unformed billets, however, can be used in striking currency such as coins and as reserves, similar to gold bars.
6.Detailed specification
Hot rolled billet steel
Size: 50x50mm-180x180mm
Steel Grade: 3SP, 5SP,Q195,Q235,Q255,Q275 Length:3m-12m
MOQ: 1000MT/size
Payment term: TT or LC
Packing: in bulk , bundle
Shipment: by container , bulk vessel
Packaging Details: bundles with steel strips or as customers's requirements
Delivery time: 15-30 days after the deposit
Loading port:Tianjin, or other port China
Origin : China
Inspection:Third party inspection before loading.
- Q:What are the main factors affecting the impact toughness of steel billets?
- There are several main factors that can affect the impact toughness of steel billets. Firstly, the chemical composition of the steel plays a significant role. The presence of certain alloying elements such as carbon, manganese, and nickel can enhance the toughness of the steel. Higher carbon content generally results in increased hardness but can decrease impact toughness. On the other hand, the addition of manganese and nickel can improve toughness by promoting the formation of fine-grained structures. Secondly, the heat treatment process employed during the production of steel billets can greatly impact their toughness. Annealing and quenching processes can help to refine the microstructure of the steel, making it more resistant to cracking and brittle fracture. On the other hand, improper heat treatment or rapid cooling rates can lead to the formation of undesirable phases or microstructural defects, which can reduce the impact toughness. Thirdly, the presence of impurities and inclusions in the steel can also affect its toughness. Non-metallic inclusions, such as sulfides and oxides, can act as stress concentrators and initiate crack propagation during impact loading. Therefore, steel with lower levels of impurities and cleaner inclusion content tends to exhibit higher toughness. Furthermore, the grain size of the steel can have a significant influence on its toughness. Finer grain sizes generally result in improved toughness due to the increased number of grain boundaries that can act as barriers to crack propagation. Therefore, steel billets with smaller grain sizes are typically more resistant to brittle fracture. Lastly, the mechanical working processes, such as hot rolling or forging, can affect the toughness of steel billets. These processes can induce deformation and strain hardening, which can lead to an increase in strength but a potential decrease in toughness. Careful control of the deformation parameters is necessary to balance strength and toughness in steel billets. In summary, the impact toughness of steel billets is influenced by various factors including chemical composition, heat treatment, impurities and inclusions, grain size, and mechanical working processes. Understanding and optimizing these factors is crucial in producing steel billets with the desired level of toughness for specific applications.
- Q:What are the different methods of steel billet testing?
- In the industry, multiple methods are commonly used to test steel billets, aiming to evaluate their quality and integrity before further processing or use in construction. Among the various methods are: 1. Visual Inspection: The surface of the steel billet is visually examined to identify any visible defects like cracks, surface irregularities, or signs of damage. 2. Ultrasonic Testing: By emitting high-frequency sound waves into the billet and analyzing the reflected waves, internal defects or inconsistencies in the steel billet are detected. 3. Magnetic Particle Inspection: This method detects surface or near-surface defects by applying magnetic particles to the billet's surface. If there are any defects, the particles will be attracted, forming easily detectable visible indications. 4. Eddy Current Testing: Electromagnetic induction is utilized in this non-destructive testing method to identify surface or near-surface defects. Changes in the magnetic field caused by irregularities or defects in the billet are detected and analyzed. 5. Chemical Analysis: The chemical composition of the steel billet is analyzed to ensure it meets the required specifications. Techniques such as spectroscopy or wet chemistry methods are typically employed to determine the levels of various elements present. 6. Tensile Testing: A small sample of the steel billet is subjected to tension until it breaks, allowing for the determination of tensile strength and other mechanical properties. This test provides valuable information regarding the overall strength and durability of the billet. 7. Hardness Testing: The hardness of the steel billet, an important property for determining its suitability for specific applications, is measured. Various hardness testing methods like Rockwell, Brinell, or Vickers hardness tests can be used. Each testing method has its own advantages and limitations, and the choice of method depends on the specific requirements and quality standards of the steel billet under examination.
- Q:What are the different methods of steel billet surface cleaning?
- There are several methods of steel billet surface cleaning, each with its own advantages and disadvantages. Some of the common methods include: 1. Shot Blasting: This method involves shooting small metallic or non-metallic particles at high velocity onto the surface of the billet. The impact of these particles removes any rust, scale, or surface contaminants. Shot blasting is an effective method for cleaning large surfaces quickly, but it can cause surface roughness and may not be suitable for all types of steel. 2. Acid Pickling: Acid pickling involves immersing the steel billet in an acid solution, typically hydrochloric or sulfuric acid, to remove scale and rust. The acid reacts with the surface contaminants, dissolving them and leaving a clean surface. Acid pickling is effective in removing stubborn scale and rust, but it requires careful handling of the corrosive acids and proper disposal of the waste. 3. Mechanical Cleaning: Mechanical cleaning methods involve using abrasive tools or brushes to physically scrub the surface of the billet. This can be done manually or using machinery. Mechanical cleaning is effective in removing loose contaminants and scale, but it may not be suitable for heavily rusted or stubbornly adhered contaminants. 4. High-Pressure Water Jetting: This method uses high-pressure water jets to clean the surface of the billet. The force of the water removes scale, rust, and other contaminants. High-pressure water jetting is environmentally friendly as it does not involve the use of chemicals, but it may not be as effective in removing heavy scale or rust. 5. Ultrasonic Cleaning: Ultrasonic cleaning involves immersing the steel billet in a tank filled with a cleaning solution and subjecting it to high-frequency ultrasonic vibrations. The vibrations create tiny bubbles in the cleaning solution, which implode on the surface of the billet, effectively removing contaminants. Ultrasonic cleaning is effective in removing even microscopic particles and can reach complex geometries, but it may not be suitable for large-scale cleaning operations. Each of these methods has its own strengths and limitations, and the choice of method depends on factors such as the type and condition of the surface contaminants, the time and cost constraints, and the desired surface finish.
- Q:How are steel billets used in the production of sheet metal?
- The production of sheet metal involves using steel billets in a process called rolling. Rolling entails passing steel billets through a series of rollers in order to decrease their thickness and create a flat sheet. To begin the process, the steel billets are heated to a specific temperature, which enhances their malleability. Once heated, the billets are fed into a rolling mill where they pass through a sequence of rollers that gradually reduce the thickness of the steel. As the billets are rolled, they undergo compression and elongation, resulting in a thinner and longer piece of steel. This procedure is repeated multiple times, with each pass further reducing the thickness of the steel sheet. After reaching the desired thickness, the sheet is cooled and cut into specific lengths. The end product is a flat sheet of sheet metal that can be further processed and utilized in various industries, including construction, automotive, and manufacturing. Steel billets play a vital role in the production of sheet metal as they serve as the raw material from which the sheets are formed. Their malleability and ability to withstand the rolling process make them an excellent choice for creating thin and long-lasting sheet metal.
- Q:What are the different heat treatment processes used for steel billets?
- Steel billets undergo various heat treatment processes, each with its own distinct purpose and resulting in different mechanical properties. These processes encompass annealing, normalizing, quenching, tempering, and case hardening. Annealing involves heating the steel billets to a specific temperature and gradually cooling them to enhance ductility and soften the material. This process mitigates internal stresses and promotes uniformity in the steel's microstructure. Normalizing entails heating the steel billets beyond the critical point and allowing them to cool in ambient air. This process improves the grain structure and mechanical properties like strength and toughness. It also reduces residual stresses and enhances the steel's machinability. Quenching is a rapid cooling technique that immerses heated steel billets in a quenching medium, such as water or oil, to achieve high hardness. The resulting material is brittle, necessitating subsequent tempering to reduce brittleness and improve toughness. Tempering involves reheating quenched steel billets to a specific temperature and then allowing them to cool slowly. This process relieves residual stresses and enhances material toughness and ductility. It also reduces the hardness attained during quenching, resulting in a balanced combination of strength and toughness. Case hardening selectively hardens the surface layer of steel billets while maintaining a softer and more ductile core. This is accomplished by introducing carbon or nitrogen into the material's surface layer through carburizing or nitriding processes. Case hardening improves surface hardness and wear resistance, making it suitable for applications that require high surface hardness. Overall, these diverse heat treatment processes for steel billets yield a range of mechanical properties, enabling customization based on specific application requirements. Each process possesses unique advantages and limitations, with selection dependent on factors such as desired mechanical properties, steel grade, and intended application.
- Q:What are the different types of defects that can occur during casting of steel billets?
- During the casting of steel billets, various types of defects may arise, impacting the quality and integrity of the final product. Some commonly encountered defects are as follows: 1. Shrinkage: Shrinkage defects manifest when the metal cools and solidifies unevenly, resulting in voids or shrinkage cavities within the billet. This irregular cooling weakens the structure and diminishes its overall strength. 2. Porosity: Porosity refers to the presence of trapped gas or air bubbles within the billet. This defect can occur due to improper gating or venting, inadequate control of pouring temperature, or the existence of impurities in the molten metal. Porosity can reduce the mechanical properties of the billet and increase its susceptibility to failure. 3. Inclusions: Inclusions denote the presence of non-metallic materials, such as oxides, sulfides, or refractory particles, that become trapped in the billet during casting. These inclusions can weaken the metal, resulting in reduced ductility, increased brittleness, and decreased resistance to fatigue or corrosion. 4. Cold shuts: Cold shuts arise when two streams of molten metal fail to fuse adequately during casting, resulting in a visible line or seam within the billet. Cold shuts can weaken the billet and cause failure under stress. 5. Hot tearing: Hot tearing occurs when the solidifying metal is constrained from contracting, leading to localized cracking or tearing. This phenomenon is typically caused by high thermal stresses or insufficient feeding of the metal during solidification. Hot tearing significantly impacts the structural integrity of the billet. 6. Misruns: Misruns are defects that occur when the molten metal fails to completely fill the mold cavity. This defect can arise due to inadequate pouring temperature, improper gating or venting, or insufficient fluidity of the metal. Misruns result in incomplete, undersized, or malformed billets with reduced mechanical properties. 7. Surface defects: Surface defects encompass surface cracks, scabs, or roughness that may occur during the solidification or cooling process. These defects contribute to increased rejection rates, reduced machinability, and compromised surface finish of the billet. It is of utmost importance to identify and minimize these defects during the casting process to ensure the production of high-quality steel billets with the desired mechanical properties and dimensional accuracy.
- Q:How are steel billets inspected for hardness?
- Steel billets are inspected for hardness using a non-destructive testing method called ultrasonic testing. This involves the use of high-frequency sound waves that are transmitted through the billet. The reflected sound waves are then analyzed to determine the hardness of the steel. This method allows for accurate and reliable hardness inspection without causing any damage to the billet.
- Q:What is the role of steel billets in the construction of power plants?
- The construction of power plants relies heavily on steel billets, which are semi-finished steel products utilized as raw materials in various processes involved in power plant production. A significant application of steel billets in this field is the creation of structural steel, which forms the framework of power plant structures like the main building, turbine halls, reactor buildings, and cooling towers. To produce the necessary structural components such as beams, columns, and trusses, steel billets are melted, refined, and cast into different shapes and sizes. These components provide essential support and stability to power plant infrastructure. Furthermore, steel billets are crucial in the manufacturing of equipment and machinery necessary for power generation. Turbine rotors, generator frames, and condensers are among the components produced using steel billets. These components play a vital role in the operation of power plants and contribute to efficient energy conversion. Moreover, steel billets are utilized in the construction of storage tanks, pipelines, and ducts within power plants. These structures are crucial for storing and transporting various fluids like water, steam, and fuel. Steel billets are transformed into sheets, plates, and tubes to fabricate these components, which are designed to withstand high pressures and temperatures. Steel billets are also highly durable and possess exceptional mechanical properties such as strength and toughness. These properties enable them to withstand the harsh operating conditions and loads experienced in power plants. They can endure high temperatures, corrosion, and stresses, ensuring the structural integrity and longevity of power plant infrastructure. In conclusion, steel billets are indispensable in power plant construction as they are employed in the production of structural components, equipment, and machinery. Their durability, strength, and versatility make them the preferred material in this industry. The use of steel billets guarantees the reliability and safety of power plants, ultimately contributing to the generation of electricity for various industries and communities.
- Q:What are the different methods of steel billet surface polishing?
- There are several methods available for steel billet surface polishing, each with its own advantages and applications. These methods include mechanical polishing, chemical polishing, electrochemical polishing, and abrasive blasting. Mechanical polishing is a widely used method that involves the use of abrasive materials to remove surface imperfections and create a smooth finish. This can be done manually using sandpaper or with the help of machinery such as buffing machines or belt sanders. Mechanical polishing is effective in removing scratches, oxidation, and other surface defects, resulting in a polished and reflective surface. Chemical polishing is a non-mechanical method that utilizes chemical reactions to remove surface imperfections. This process involves the immersion of the steel billet in a chemical solution that dissolves a thin layer of the material, resulting in a smoother surface. Chemical polishing is often used for intricate or delicate parts, as it can achieve a high level of precision and uniformity. Electrochemical polishing, also known as electropolishing, is a method that combines chemical and electrical processes to polish the steel billet surface. It involves immersing the billet in an electrolyte solution and applying an electric current. The electrical current removes microscopic peaks and imperfections, resulting in a smoother and brighter surface. Electrochemical polishing is commonly used for stainless steel billets due to its ability to remove surface contaminants and enhance corrosion resistance. Abrasive blasting, also known as sandblasting, is a method that uses high-pressure air or water to propel abrasive materials onto the steel billet surface. This process effectively removes rust, scale, and other surface contaminants, resulting in a clean and textured finish. Abrasive blasting can be done using various abrasive materials such as sand, steel shot, or glass beads, depending on the desired surface finish. In summary, the different methods of steel billet surface polishing include mechanical polishing, chemical polishing, electrochemical polishing, and abrasive blasting. Each method has its own advantages and applications, offering a range of options to achieve the desired surface finish for steel billets.
- Q:How are steel billets inspected for defects?
- Steel billets are inspected for defects using various non-destructive testing methods such as visual inspection, ultrasonic testing, magnetic particle inspection, and eddy current testing. These techniques help identify surface cracks, internal flaws, and other defects that may compromise the quality and integrity of the steel billets.
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Prime Steel Billet Q275, 20MnSi, 5SP，for very good price
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 m.t.
- Supply Capability:
- 20000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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