Hot rolled Steel Square Billets Q195 and Q235 with High Quality for Construction
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25000 m.t.
- Supply Capability:
- 200000 m.t./month
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Quality Product, Order Online Tracking, Timely Delivery
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Specification of Hot rolled Steel Square Billets Q195 and Q235 with High Quality for Construction:
Chemical Composition. Q195
Standard | Grade | Element (%) | ||||
GB | Q195 | C | Mn | S | P | Si |
0.06~0.12 | 0.25~0.50 | ≤0.050 | ≤0.045 | ≤0.30 | ||
Chemical Composition. Q235
Standard | Grade | Element (%) | ||||
GB | Q235B | C | Mn | S | P | Si |
0.12~0.20 | 0.30~0.70 | ≤0.045 | ≤0.045 | ≤0.30 | ||
Technology process of Hot rolled Steel Square Billets Q195 and Q235 with High Quality for Construction:
1.Heat the EVA film
2.Cover the heated EVA film on the mould(can be made from wood or aluminum)
3.Spray a coating in a certain baume degree
4.Put on the empty blask
5.Sand-up the flask and vibrate to compaction
Packaging & Delivery of Hot rolled Steel Square Billets Q195 and Q235 with High Quality for Construction:
Packaging Details:containers
Delivery Detail:Complete one set of equipment needs for three months
The products can be delivered by bulk vessel or by container. As for container, products with the length of 6m will be loaded in 20’ container, with 9m or 12m, in 40’ container.
-The maximum quantity of loading of container is 25 tons.
-The products usually are transported to the nearest port from the production place.
FAQ:
Q1: How soon can we receive the product after purchase?
A1: 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.
Q2: What makes stainless steel stainless?
A2: 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.
Q3: Can stainless steel rust?
A3: 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.
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- Q:What are the main factors affecting the fatigue strength of steel billets?
- There are several main factors that can affect the fatigue strength of steel billets. 1. Material Composition: The composition of the steel billet, including the type and amount of alloying elements, plays a significant role in determining its fatigue strength. Elements like carbon, manganese, and silicon can influence the material's ability to resist fatigue and withstand cyclic loading. 2. Surface Quality: The surface quality of steel billets is crucial in determining their fatigue strength. Surface defects such as cracks, scratches, or pits can act as stress concentrators, leading to premature fatigue failure. Therefore, proper surface preparation and inspection are necessary to ensure high fatigue resistance. 3. Heat Treatment: The heat treatment process used to modify the microstructure of the steel billet can significantly affect its fatigue strength. Proper heat treatment techniques like quenching and tempering can improve the material's fatigue resistance by enhancing its hardness, strength, and toughness. 4. Grain Size: The grain size of the steel billet's microstructure also plays a role in determining its fatigue strength. Finer grains generally exhibit higher fatigue resistance due to reduced stress concentration and improved grain boundary strength. 5. Residual Stress: Residual stresses, which can result from various manufacturing processes, can significantly affect the fatigue strength of steel billets. High levels of residual stress can act as a starting point for fatigue cracks, reducing the material's fatigue life. 6. Operating Conditions: The operating conditions, including the applied cyclic load magnitude, frequency, and temperature, can affect the fatigue strength of steel billets. Higher loads, faster cycling rates, and elevated temperatures can all decrease the material's fatigue life. 7. Environmental Factors: The environment in which the steel billet operates can also impact its fatigue strength. Factors like humidity, corrosive gases, and exposure to chemicals can accelerate fatigue crack initiation and propagation, leading to reduced fatigue resistance. Understanding and considering these main factors affecting the fatigue strength of steel billets is crucial in designing components and structures that can withstand cyclic loading and ensure long-term reliability.
- Q:How are steel billets used in the manufacturing of wire products?
- Steel billets are used in the manufacturing of wire products by being hot rolled into thin rods or wires, which are then further processed to achieve the desired shape and dimensions. These billets serve as the raw material for wire drawing, where they are pulled through a series of dies to reduce their size and increase their length. This process helps to improve the strength, ductility, and surface finish of the wire, making it suitable for various applications such as construction, automotive, and electrical industries.
- Q:How are steel billets used in the production of mining machinery?
- Steel billets are an essential component in the production of mining machinery due to their unique properties and versatility. These billets, which are semi-finished metal forms, are typically made from raw iron ore and undergo a series of heating, rolling, and cooling processes to obtain their final shape and properties. In the production of mining machinery, steel billets serve as the primary raw material for various important components. One of the most common uses is in the manufacturing of heavy-duty structural parts, such as frames, chassis, and support structures. These components require high strength and durability to withstand the extreme conditions and heavy loads encountered in mining operations. Additionally, steel billets are used for the production of critical functional components, including gears, shafts, and axles. These components are crucial for the proper functioning of mining machinery, as they transmit power, facilitate movement, and control the operation of various equipment. Steel billets offer excellent machinability, allowing them to be easily shaped and fabricated into complex geometries required for these components. Furthermore, steel billets are used in the production of wear-resistant parts and components, such as cutting edges, buckets, and crusher liners. Mining machinery is subjected to constant abrasion, impact, and wear, and therefore requires materials that can withstand such harsh conditions. Steel billets are often alloyed with other elements, such as manganese or chromium, to enhance their hardness, toughness, and resistance to wear. Another application of steel billets in mining machinery is in the production of hydraulic components and systems. These components, such as hydraulic cylinders, valves, and pumps, play a crucial role in the operation and control of mining equipment. Steel billets provide the necessary strength and integrity to withstand high-pressure hydraulic systems, ensuring reliable and efficient performance. In summary, steel billets are an integral part of the production of mining machinery. They are used to manufacture various structural, functional, and wear-resistant components that are essential for the reliable and efficient operation of mining equipment. The unique properties of steel billets, including their strength, durability, and machinability, make them an ideal choice for withstanding the demanding conditions encountered in mining operations.
- Q:How are steel billets rolled or forged into other shapes?
- Steel billets can be transformed into various shapes through a process called rolling or forging. Rolling involves passing the heated billet through a series of rollers that apply pressure to reshape the material. This process is often used to produce long and flat shapes such as sheets, plates, and bars. During rolling, the billet is first heated to a specific temperature to make it more malleable. It is then fed into the rolling mill, where a pair of rotating rollers exerts pressure on the billet to reduce its thickness and elongate it. The rollers can be smooth or grooved, depending on the desired shape of the final product. The billet is passed through the rollers multiple times, gradually reducing its thickness and lengthening it. This process can be repeated with different sets of rollers to achieve specific dimensions and cross-sectional shapes. The final product is then cooled and cut to the desired length. Forging, on the other hand, involves applying compressive forces to the heated billet to shape it into various forms. There are two main types of forging processes: open-die forging and closed-die forging. In open-die forging, the heated billet is placed between two flat dies, and a hammer or press applies pressure to deform the material. The billet is repeatedly struck or pressed until it takes the desired shape. This process is commonly used for producing large and complex shapes such as crankshafts, connecting rods, and turbine discs. Closed-die forging, also known as impression-die forging, involves using two or more dies with cavities that mirror the desired shape of the final product. The heated billet is placed between the dies, and pressure is applied to force the material into the cavities, filling them completely. This process is often used to produce smaller and more intricate shapes like automotive parts, hand tools, and fittings. Both rolling and forging processes require the billet to be heated to a specific temperature to make it more ductile and easier to shape. The choice between rolling and forging depends on factors such as the desired shape, size, and mechanical properties of the final product.
- Q:What are the different types of steel billet forming processes?
- The different types of steel billet forming processes include hot rolling, cold rolling, extrusion, forging, and casting.
- Q:How are steel billets inspected for chemical composition?
- Steel billets are typically inspected for chemical composition through a process called spectroscopy. In this method, a small sample is taken from the billet and analyzed using specialized instruments such as optical emission spectroscopy or X-ray fluorescence spectroscopy. These instruments measure the emission or absorption of specific wavelengths of light to determine the concentration of different elements present in the steel. This allows for accurate assessment of the chemical composition of the billet, ensuring it meets the required specifications.
- Q:Can steel billets be customized according to specific requirements?
- Yes, steel billets can be customized according to specific requirements. Steel billets are semi-finished products that are typically used for further processing to produce various steel products, such as bars, rods, and wire. The customization of steel billets involves adjusting their dimensions, chemical composition, and mechanical properties to meet the specific needs of different applications. Steel billets can be customized in terms of their size and shape. Depending on the requirements, the length, width, and thickness of the billets can be modified to ensure optimal efficiency during subsequent processing. Additionally, the shape of the billets can be customized to match the desired end product, such as square, round, or rectangular. Furthermore, the chemical composition of steel billets can be customized to achieve specific properties. By adjusting the percentage of various elements, such as carbon, manganese, and alloying elements like chromium or nickel, the steel can be tailored to exhibit certain characteristics, such as increased strength, improved corrosion resistance, or enhanced weldability. Finally, the mechanical properties of steel billets can be customized through heat treatment processes. Heat treatment techniques like quenching and tempering can be applied to control the hardness, toughness, and overall strength of the steel, making it suitable for specific applications. Overall, steel billets can be customized in terms of size, shape, chemical composition, and mechanical properties to meet specific requirements, ensuring that they can be effectively used in various industries and applications.
- Q:How are steel billets used in the production of power transmission equipment?
- Steel billets are an essential component in the production of power transmission equipment. Power transmission equipment, such as gears, shafts, and couplings, require high-strength and durable materials to withstand the forces and stresses involved in transmitting power. Steel billets, which are semi-finished steel products, play a crucial role in meeting these requirements. Firstly, steel billets are used as raw material for forging or casting processes to create various components of power transmission equipment. Forging involves heating the billets to a high temperature and then shaping them under extreme pressure, resulting in a strong and dense material with excellent mechanical properties. Casting, on the other hand, involves pouring molten steel into molds to form complex shapes. Steel billets are melted and cast into molds to create intricate components like gears or shafts. Furthermore, the composition and quality of steel billets are carefully controlled to ensure that the final product meets the specific requirements of power transmission equipment. Steel billets are made from various steel grades, each with different properties such as strength, hardness, and wear resistance. The choice of steel grade depends on the specific application and operating conditions of the power transmission equipment. For instance, a gear used in heavy-duty industrial machinery may require a higher strength steel billet compared to a gear used in a smaller-scale application. Additionally, steel billets can undergo further processing, such as heat treatment, to enhance their mechanical properties. Heat treatment processes like quenching and tempering can improve the hardness, toughness, and overall performance of the billets. This ensures that the final power transmission equipment has the necessary strength and durability to withstand the rigors of transmitting power. In summary, steel billets are crucial in the production of power transmission equipment due to their strength, durability, and versatility. They serve as raw material for forging or casting processes, allowing the creation of complex components. The careful selection of steel grade and heat treatment processes ensure that the final product meets the specific requirements of power transmission equipment, making steel billets an integral part of the manufacturing process.
- Q:What are the main factors that influence the strength of steel billets?
- The strength of steel billets is impacted by various factors, including the chemical composition, heat treatment, and microstructure of the steel. The chemical composition plays a significant role in determining the strength of steel billets. Alloying elements like carbon, manganese, silicon, and chromium can enhance strength by forming solid solutions or precipitates that increase hardness and tensile strength. It is crucial to control impurity levels and maintain the desired balance of alloying elements to achieve the desired strength properties. Heat treatment is another important factor that affects the strength of steel billets. This process involves heating the steel to a specific temperature and then cooling it at a controlled rate. It significantly impacts the microstructure of the steel, which ultimately influences its strength. For example, quenching and tempering can result in the formation of desired microstructures like martensite or bainite, which enhance strength and toughness. The microstructure of steel billets also plays a crucial role in determining their strength. The arrangement of crystal grains and the presence of different phases within the steel greatly influence its mechanical properties. Fine-grained structures generally exhibit higher strength due to a greater number of grain boundaries, which inhibit dislocation movement and enhance strength. Additionally, the presence of specific microstructural features like precipitates or second-phase particles can contribute to the strength of steel billets. Other factors such as the manufacturing process, cooling rate during solidification, and mechanical working (such as rolling or extrusion) can also affect the strength of steel billets. These factors impact grain size, grain boundary density, and defect concentration, all of which influence the mechanical properties of the steel. In conclusion, the strength of steel billets is influenced by the chemical composition, heat treatment, and microstructure of the steel. These factors can be carefully controlled and optimized to achieve the desired strength properties for various applications.
- Q:What are the different surface defects found in tool steel billets?
- There are several different surface defects that can be found in tool steel billets. These defects can occur during the manufacturing process or can be the result of handling, transportation, or storage. Some of the common surface defects found in tool steel billets include: 1. Decarburization: This defect occurs when the surface of the steel billet loses its carbon content due to exposure to high temperatures during heat treatment or improper cooling. Decarburization can lead to reduced hardness and wear resistance in the tool steel. 2. Scale: Scale refers to the formation of oxide layers on the surface of the steel billet. It can occur during the hot rolling process or due to exposure to high temperatures. Scale can negatively impact the surface finish and can also affect the mechanical properties of the tool steel. 3. Cracks: Cracks can occur on the surface of tool steel billets due to various reasons such as improper cooling, excessive stress during hot rolling, or quenching. These cracks can be either surface cracks (which are visible) or internal cracks (which may not be immediately visible). 4. Inclusions: Inclusions are non-metallic particles or impurities that are trapped within the steel billet during the manufacturing process. These inclusions can cause weak spots or discontinuities in the material, leading to reduced toughness and fatigue resistance. 5. Pitting: Pitting refers to the formation of small holes or cavities on the surface of the steel billet. It can be caused by localized corrosion, exposure to aggressive environments, or improper handling. 6. Roll marks: Roll marks are surface imperfections that occur due to the contact between the steel billet and the rolls during the hot rolling process. These marks can appear as grooves, scratches, or indentations on the surface of the tool steel. 7. Surface contamination: Tool steel billets can get contaminated with foreign substances such as dirt, oil, grease, or other particles during handling, transportation, or storage. These contaminants can negatively affect the surface finish and can also lead to corrosion or other defects. It is important to detect and address these surface defects in tool steel billets to ensure the desired performance and reliability of the final tooling products. Various inspection techniques and quality control measures are employed to identify and mitigate these defects, such as visual inspection, ultrasonic testing, magnetic particle inspection, and surface cleaning processes.
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Hot rolled Steel Square Billets Q195 and Q235 with High Quality for Construction
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25000 m.t.
- Supply Capability:
- 200000 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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