Hot Rolled Steel Round Bar GB, ASTM, JIS Standard WIth High Quality

Hot Rolled Steel Round Bar GB, ASTM, JIS Standard WIth High Quality System 1

Hot Rolled Steel Round Bar GB, ASTM, JIS Standard WIth High Quality

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 200000 m.t./month

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Product Description:

1. Grade: Q195, Q235, A36, SS400, Q345

2. Material: Mild carbon steel

3. Diameter: 8mm-150mm

4. Length: 6m, 9m, 12m

5. Quenching methods: oil quenching, air cooling or salt bath quenching

6. Heat treatment: Isothermal annealing temperature is 800~880 °C, with 10~20 °C, the furnace cooling to about 600 °C

Usage and Applications of High Quality Hot Rolled Steel Round Bar GB, ASTM, JIS Standard

1. Construction steel round bar is mostly used for straight bundles supply, and used for steel, bolts and various mechanical parts. While the bigger round bar, or more than 25mm hot rolled bar, is mainly for the manufacture of mechanical parts or for seamless steel billet.

2. Steel round bar is used in construction and a large number of architectural and engineering structures.

3. Besides, we can supply some especial material steel round bar that can be used for main shaft of steamer, hummer shank, with big section and supper force.

Packaging & Delivery of High Quality Hot Rolled Steel Round Bar GB, ASTM, JIS Standard

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: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: The price 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.

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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.

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High Quality Hot Rolled Steel Round Bar GB, ASTM, JIS Standard

Q:How are steel round bars used in the mining industry?: Steel round bars are widely used in the mining industry for a variety of applications. One of the most common uses is in the construction and reinforcement of underground support systems. These bars are often used as roof bolts or rock bolts to provide stability and prevent cave-ins or roof falls in underground mines. Steel round bars are also used in the manufacturing of drilling equipment. They are frequently used as drill rods or drill bits, providing the necessary strength and durability to withstand the harsh conditions of drilling in mining operations. These bars are typically heat-treated to increase their hardness and resistance to wear, ensuring their longevity in the drilling process. Another important application of steel round bars in mining is in the production of grinding media for grinding mills. These bars, known as grinding rods, are used to grind and crush ore particles in the milling process. They are made from high-quality steel and have a specific hardness and toughness to effectively break down the ore into smaller particles, facilitating the extraction of valuable minerals. Additionally, steel round bars are used in the construction of conveyor systems in mining operations. They are commonly used as support bars or rollers in conveyor belts, ensuring the efficient transport of mined materials from one location to another. In summary, steel round bars play a crucial role in the mining industry. From providing support and stability in underground mines to manufacturing drilling equipment and grinding media, these bars are essential in various mining processes, contributing to the overall efficiency and productivity of mining operations.

Q:What is the difference between a seamless and a precision ground steel round bar?: A seamless steel round bar is manufactured without any seams or welds, resulting in a smooth and uniform surface throughout the entire length. On the other hand, a precision ground steel round bar is manufactured with precise dimensions and surface finish, typically achieved through grinding or machining processes. This ensures tighter tolerances and a more accurate diameter, making it suitable for applications requiring high precision and tight dimensional control.

Q:What are the different shapes available for steel round bars?: Steel round bars come in various shapes to cater to different applications. Some of the most common shapes include: 1. Round: The round shape is the most fundamental and widely used for steel round bars. It has a cylindrical form with a circular cross-section. Round bars find applications in multiple industries, including construction, automotive, and manufacturing. 2. Square: Square steel round bars possess a square cross-section. They are frequently employed in situations that demand additional strength and stability, such as support columns, fences, and ornamental ironwork. 3. Hexagonal: Hexagonal steel round bars feature six sides and a hexagonal cross-section. They provide a desirable combination of strength and versatility, making them popular for machine parts, fasteners, and tooling. 4. Flat: Flat steel round bars have a rectangular cross-section with a narrow width and thick height. They are commonly utilized in construction and manufacturing for purposes such as braces, brackets, and supports. 5. Half-round: Half-round steel round bars exhibit a semi-circular cross-section. They are commonly utilized in architectural and decorative applications like handrails, edging, and trim work. These represent some of the most prevalent shapes available for steel round bars. The choice of shape depends on the specific requirements of the application, including strength, stability, and aesthetics.

Q:Are steel round bars suitable for use in the construction industry?: Yes, steel round bars are commonly used in the construction industry due to their strength, durability, and versatility. They provide structural support in various applications such as reinforcement in concrete, framing, and the creation of beams and columns. Additionally, steel round bars can be easily fabricated, welded, and formed into different shapes, making them a suitable choice for a wide range of construction projects.

Q:What are the environmental impacts of steel round bar production?: The production of steel round bars has several environmental impacts. Firstly, the extraction of raw materials such as iron ore and coal required for steel production leads to habitat destruction, deforestation, and disruption of ecosystems. Mining activities also generate large amounts of waste, including tailings and waste rock, which can contaminate soil, water bodies, and air. The process of converting iron ore into steel involves high energy consumption, primarily from fossil fuels. The burning of these fuels releases greenhouse gases, such as carbon dioxide and nitrogen oxides, contributing to climate change and air pollution. Additionally, steel production releases particulate matter, sulfur dioxide, and other pollutants that can have detrimental effects on human health and ecosystems. Steel manufacturing also requires significant amounts of water for cooling, cleaning, and processing. This can lead to water scarcity and pollution if proper water management practices are not in place. Discharge of untreated or inadequately treated wastewater from steel production can contaminate nearby water sources, affecting aquatic life and potentially harming human populations who rely on these water bodies. Furthermore, the transportation of raw materials and finished steel products over long distances contributes to carbon emissions and air pollution. The energy-intensive nature of steel production and transportation further exacerbates the overall environmental impacts of the industry. To mitigate these environmental impacts, the steel industry has been implementing various measures. These include the use of more efficient technologies, such as recycling and minimization of waste, improving energy efficiency, and adopting cleaner production processes. Additionally, the industry has been focusing on reducing its carbon footprint by increasing the use of renewable energy sources and implementing carbon capture and storage technologies. Overall, while steel round bar production contributes to environmental degradation, there are ongoing efforts within the industry to minimize its negative impacts and transition towards more sustainable practices.

Q:What is the difference between hot-rolled and cold-rolled steel round bars?: The manufacturing process is the primary factor that distinguishes hot-rolled and cold-rolled steel round bars, giving rise to distinct physical and mechanical properties. Hot-rolled steel round bars are formed by subjecting a billet or ingot to extremely high temperatures, usually above 1700°F (926°C). This allows the steel to become malleable and easily shaped. The process involves passing the heated steel through large rollers, which gradually decrease the diameter and increase the length. Consequently, hot-rolled bars have a rough, scaled surface with rounded edges. The rapid cooling that follows also creates an oxide layer or mill scale on the surface. In contrast, cold-rolled steel round bars are produced by rolling the steel at room temperature or slightly below. This method offers greater control over the dimensions and surface finish of the bars. The process entails passing the steel through smaller rollers, which exert high pressure to shape and compress the material. As a result, cold-rolled bars have a smoother and more precise surface finish, with sharper edges compared to their hot-rolled counterparts. Furthermore, since the steel is not subjected to high temperatures, it retains its strength and hardness properties. The differing manufacturing processes lead to variations in the mechanical properties of hot-rolled and cold-rolled steel round bars. Hot-rolled bars typically have a higher yield strength and are generally more ductile, making them suitable for applications that involve extensive shaping or bending. On the other hand, cold-rolled bars have a higher tensile strength and are generally harder, making them suitable for applications that require greater strength and dimensional accuracy. In conclusion, the key distinctions between hot-rolled and cold-rolled steel round bars arise from the manufacturing process, resulting in differences in surface finish, dimensional accuracy, and mechanical properties. The choice between the two depends on the specific requirements of the intended application.

Q:Can steel round bars be used in the manufacturing of mining equipment?: Yes, steel round bars can be used in the manufacturing of mining equipment. Steel round bars are often used as a raw material in the fabrication of various components and parts for mining equipment due to their high strength, durability, and resistance to wear and tear. These bars can be machined, forged, or welded into different shapes and sizes to meet the specific requirements of mining equipment, such as drill bits, conveyor systems, crushers, and support structures.

Q:Can steel round bars be used in the manufacturing of bearings?: No, steel round bars are not typically used in the manufacturing of bearings. Bearings require materials that have specific characteristics such as high strength, hardness, and wear resistance. Steel round bars may not possess these properties in the required magnitude. Instead, bearings are typically made from high-quality steel alloys specifically designed for bearing applications, such as bearing steel or stainless steel. These materials undergo specialized heat treatment processes to achieve the desired properties necessary for bearing manufacturing, including high load-carrying capacity, low friction, and long-lasting durability.

Q:How do you calculate the fatigue strength of a steel round bar?: To calculate the fatigue strength of a steel round bar, you typically conduct a fatigue test, also known as a fatigue life assessment. This involves subjecting the round bar to repeated loading cycles, with varying stress levels, until it fails. The number of cycles the bar can withstand before failure is the fatigue strength. This test helps determine the endurance limit or fatigue limit of the steel round bar, which represents the maximum stress level that the bar can endure indefinitely without failure.

Q:How do I choose the right grade of steel round bar for my application?: To select the appropriate grade of steel round bar for your needs, it is crucial to carefully consider various factors. Here are some guidelines to assist you in making an educated decision: 1. Begin by understanding the specific requirements of your application. Take into account factors like load-bearing capacity, resistance to corrosion, temperature endurance, and any applicable industry regulations or standards. 2. Determine the mechanical properties necessary for your application. Depending on the specific use, you may require certain properties such as strength, hardness, toughness, or ductility. Prioritize these properties based on their significance to your application. 3. Assess the environmental conditions in which the steel round bar will be used. This includes factors like exposure to moisture, chemicals, high temperatures, or abrasive surroundings. Certain grades of steel offer better resistance to corrosion or heat, rendering them more suitable for specific conditions. 4. Seek guidance from experts if you are uncertain about the most suitable grade of steel for your application. Consult metallurgists, engineers, or suppliers who can provide valuable insights based on their expertise and experience. 5. Compare and contrast different grades of steel round bars available in the market once you have a clear understanding of your application requirements. Consider factors such as composition, manufacturing process, and specific properties associated with each grade. Look for grades that closely align with your requirements. 6. Review the industry standards and specifications to determine if any specific grades are mandated for your application. These standards can offer guidance and ensure compliance with safety and quality requirements. 7. Evaluate the cost-effectiveness of various grades by considering factors like initial purchase cost, maintenance and replacement expenses, and the overall lifespan of the steel round bar. 8. If possible, conduct tests or trials using different grades of steel round bars to assess their performance in your specific application. This will provide valuable data to aid your decision-making process. By following these steps and taking all relevant factors into account, you can efficiently and effectively select the appropriate grade of steel round bar that meets the demands of your application.

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