HOT ROLLED ROUND BAR

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Payment Terms:: TT OR LC

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Specifications of Wire Rod Q235:

Steel Grade: Q235, Standard: GB Diameter: 5.5mm, 6.5mm, 7mm,8mm,9mm,10mm,12mm,14mm

Diameter Tolerance:±0.3mm 6.5mm can be drawing into 2mm/8.0mm can be drawing into 3mm

Brand Name: N-RIVER Place of Origin: Hebei, China Mainland Application: construction, building etc

Chemical Composition:

Please kindly find our chemistry of our material based on Q235 as below for your information

Trademark	Rank	Chemical composition (quality score) %
		C	Si	Mn	S	P
		C	Si	Mn	S	P
			≤		≤	≤
Q235	A	0.14-0.22	0.30	0.30-0.65	0.050	0.045
Q235	B	0.12-0.20	0.30	0.30-0.70	0.045	0.045
Trademark	Rank	Pulling Test
		Bend PointΔs/Mpa		Tensile Strength	Elongation Ratioδ5%
					Elongation Ratioδ5%
		Thickness (Diameter) /MM			Thickness (Diameter) /MM
		≤16	16-40		≤16	16-40
		≥			≥
Q235	A	235	225	375-500	26	25
Q235	B	235	225	375-500	26	25

Usage and Applications of Wire Rod Q235:

After hot-rolled the products shaped into coil and delivery as finished product, including round, square, rectangular, hexagonal and so on. Since most of the products are round, it is generally called wire rod. Carbon steel wire rod is widely used in construction and manufacturing. Carbon steel wire rod is mainly used for reinforcement of reinforced concrete and welded structure or reprocessed (roberts , nail, etc.) materials, especially used to produce wire drawing, welding electrode, nails, spring, electronic, precise machinery parts and so on.

Packaging & Delivery of Wire Rod Q235:

Packaging Detail: products are packed in coil and then shipped by container or bulk vessel

Each coil weight: 2-3MT

Delivery Detail: within 45 days after received deposit or LC.

Label: to be specified by customer, generally, each bundle has 1-2 labels

Trade terms: FOB, CFR, CIF

Q: What are the quality control measures for steel round bars?: Quality control measures for steel round bars typically involve a series of inspections and tests to ensure that the bars meet the required specifications and standards. These measures are crucial to ensure the structural integrity and reliability of the steel bars. Some common quality control measures for steel round bars include: 1. Visual Inspection: This involves a visual examination of the bars to detect any surface defects such as cracks, pits, or rust. It ensures that the bars have a smooth surface finish and are free from any visible imperfections. 2. Dimensional Inspection: This involves measuring the diameter, length, and straightness of the steel bars to ensure they meet the required tolerances. Any deviations from the specified dimensions can affect the performance and fit of the bars in various applications. 3. Chemical Composition Analysis: Steel round bars undergo chemical composition analysis to verify the percentage of various elements present in the steel. This analysis helps ensure that the bars have the correct alloying elements in the right proportions, which directly impacts their mechanical properties and performance. 4. Mechanical Testing: Various mechanical tests are performed on steel round bars to assess their strength, hardness, and other mechanical properties. These tests can include tensile testing, impact testing, and hardness testing. These tests help determine if the bars meet the required strength and durability standards. 5. Ultrasonic Testing: Ultrasonic testing is often used to detect internal defects such as voids, inclusions, or cracks in steel round bars. This non-destructive testing technique uses high-frequency sound waves to identify any flaws that may compromise the structural integrity of the bars. 6. Surface Treatment Inspection: If the steel round bars undergo any surface treatments such as heat treatment or coating, an inspection is conducted to ensure that the treatments are properly applied and meet the required specifications. 7. Certification and Documentation: Quality control measures also include proper documentation and certification of the steel round bars. This ensures traceability and provides evidence that the bars have undergone the required inspections and tests, giving customers confidence in the product's quality. Overall, these quality control measures for steel round bars help ensure that the bars are of high quality, meet the required specifications, and are suitable for their intended applications.

Q: How do steel round bars compare to titanium round bars?: Steel round bars and titanium round bars have different properties and characteristics that make them suitable for different applications. Here is a comparison between the two: 1. Strength: Titanium round bars have a higher strength-to-weight ratio than steel round bars. This means that titanium can withstand higher loads and stresses while being lighter in weight compared to steel. However, steel round bars are generally stronger and more rigid than titanium, making them suitable for heavy-duty applications that require high strength. 2. Corrosion Resistance: Titanium round bars are highly resistant to corrosion, even in harsh environments such as saltwater. Steel, on the other hand, is susceptible to corrosion and requires additional protective measures (such as coatings or galvanization) to prevent rusting. Therefore, titanium round bars are preferred in applications where corrosion resistance is essential. 3. Density: Titanium round bars have a lower density compared to steel round bars. This low density makes titanium ideal for applications where weight reduction is crucial, such as aerospace and automotive industries. Steel round bars, with their higher density, are typically used in applications where weight is less of a concern. 4. Temperature Resistance: Titanium round bars have excellent heat resistance, retaining their mechanical properties at high temperatures. Steel round bars, however, can lose their strength and become brittle when exposed to high temperatures. Therefore, titanium round bars are suitable for applications that require elevated temperature resistance. 5. Cost: Steel round bars are generally more affordable than titanium round bars. Titanium is an expensive metal due to its scarcity and complex extraction process. The cost difference between the two materials can be significant, making steel round bars more favorable for budget-conscious projects. In conclusion, the choice between steel round bars and titanium round bars depends on the specific requirements of the application. Steel is preferred for its superior strength and affordability, while titanium offers advantages such as high strength-to-weight ratio, corrosion resistance, temperature resistance, and lower density.

Q: How do you calculate the shear strength of a steel round bar?: To calculate the shear strength of a steel round bar, you need to know its diameter and the material's shear modulus. The shear strength is determined by dividing the maximum load the bar can withstand before it shears by its cross-sectional area. The formula to calculate the shear strength is as follows: Shear Strength = Maximum Load / Cross-sectional Area To find the cross-sectional area, you need to calculate the area of a circle using the diameter of the round bar. The formula for the area of a circle is: Area = π * (Diameter/2)^2 Once you have the maximum load and the cross-sectional area, you can substitute these values into the shear strength formula to determine the shear strength of the steel round bar. It's important to note that the shear modulus is a critical factor in the calculation. The shear modulus represents the material's resistance to deformation and measures how much shear stress the material can withstand before it starts to deform. The shear modulus value can be obtained from reference materials or technical specifications provided by the manufacturer.

Q: Can steel round bars be bent or formed into different shapes?: Yes, steel round bars can be bent or formed into different shapes. Steel is a highly malleable material, which means it can be easily shaped without breaking or cracking. To bend or form steel round bars, various methods can be used, such as heating the bars to make them more pliable or using specialized tools like hydraulic benders or presses. The degree to which steel round bars can be bent or formed depends on factors such as the thickness and composition of the steel, as well as the specific shape or angle desired. Overall, steel round bars offer a versatile option for creating a wide range of shapes and structures in various industries, including construction, automotive, and manufacturing.

Q: How are steel round bars stored?: To ensure the safety and easy accessibility of steel round bars, they are typically stored in a manner that prioritizes these factors. One common storage method involves horizontally stacking the bars on a pallet or rack system, often bundling them together and securing them with straps or wire to prevent rolling or shifting. Another option is to store the bars vertically in racks, placing each bar in a designated slot to avoid contact or damage. In both cases, maintaining proper spacing between the bars is crucial to allow for sufficient air circulation and prevent potential corrosion. Additionally, it is essential to store steel round bars in a dry and covered area to shield them from moisture, dust, and other environmental elements. Proper labeling and inventory management systems are also of utmost importance to ensure easy identification and retrieval of the bars when necessary.

Q: Can steel round bars be coated for improved aesthetics?: Indeed, steel round bars have the potential to be coated for enhanced aesthetics. By applying a coating to steel round bars, their appearance can be elevated, resulting in a sleeker and more visually pleasing surface. Multiple coating alternatives, such as powder coating, electroplating, or painting, can be utilized to achieve diverse aesthetic outcomes when coating steel round bars. Moreover, these coatings offer more than just an improved appearance; they also grant additional advantages like increased resistance to corrosion and heightened durability. As a result, the practice of coating steel round bars is widely employed across various domains, including architecture, decoration, and industry, to enhance their aesthetics.

Q: What are the different types of steel round bar alloys for improved corrosion resistance?: There are several types of steel round bar alloys that are known for their improved corrosion resistance. Some of the commonly used alloys include stainless steel, weathering steel, and duplex stainless steel. 1. Stainless Steel: This alloy contains a minimum of 10.5% chromium, which forms a thin, protective layer of chromium oxide on the surface of the steel. This layer acts as a barrier against corrosion, making stainless steel highly resistant to rust and other forms of corrosion. Different grades of stainless steel, such as 304 and 316, offer varying levels of corrosion resistance depending on the specific application. 2. Weathering Steel: Also known as Corten steel, weathering steel develops a protective rust-like appearance when exposed to the weather. This self-healing characteristic makes it resistant to atmospheric corrosion. The addition of copper, chromium, and nickel in weathering steel enhances its corrosion resistance and enables it to withstand harsh environmental conditions without the need for painting. 3. Duplex Stainless Steel: Duplex stainless steel is a combination of austenitic and ferritic stainless steels. This alloy offers excellent corrosion resistance due to its high chromium and molybdenum content. Duplex stainless steel is particularly resistant to localized corrosion, such as pitting and crevice corrosion, making it suitable for applications in aggressive environments like marine and chemical industries. It is important to note that the choice of steel round bar alloy for improved corrosion resistance depends on the specific application requirements and environmental conditions. Consulting with a materials engineer or corrosion specialist can help determine the most suitable alloy for a particular application.

Q: What is the difference between a hot rolled and a precision ground steel round bar?: A hot rolled steel round bar and a precision ground steel round bar differ primarily in their manufacturing processes and resulting surface finish. Hot rolled steel round bars are produced by heating the steel billet or ingot to high temperatures and then passing it through a series of rollers to achieve the desired shape and size. This process results in a rougher surface finish with visible mill-scale or oxide layers. The hot rolling process also allows for variations in size and shape, making it a more cost-effective option for producing steel round bars in large quantities. On the other hand, precision ground steel round bars undergo a more refined and controlled manufacturing process. After the initial hot rolling, the bar is then ground to achieve a smooth and consistent surface finish. Precision grinding removes the mill-scale and oxide layers, resulting in a more polished appearance. This process also ensures a tight dimensional tolerance and improved straightness of the round bar. The choice between a hot rolled and a precision ground steel round bar depends on the specific application requirements. Hot rolled round bars are typically used in applications where surface finish is not critical, such as structural components, machinery parts, or construction materials. Precision ground steel round bars, on the other hand, are utilized in applications where a smooth surface finish, precise dimensions, and tight tolerances are necessary, such as in the manufacturing of precision tools, machinery components, or in industries like aerospace or automotive. In summary, the main difference between a hot rolled and a precision ground steel round bar lies in their manufacturing processes and resulting surface finish. Hot rolled round bars offer cost-effectiveness and versatility, while precision ground round bars provide a smoother surface finish, tighter tolerances, and improved dimensional accuracy for more demanding applications.

Q: How do steel round bars resist corrosion?: Steel round bars resist corrosion due to the presence of a protective oxide layer on their surface, formed through the process of passivation. This oxide layer acts as a barrier, preventing the steel from coming into direct contact with corrosive substances, thereby inhibiting the oxidation reaction that leads to corrosion. Additionally, certain alloying elements, such as chromium, can be added to the steel composition to enhance its corrosion resistance properties.

Q: Can steel round bars be used for making storage tanks?: Yes, steel round bars can be used for making storage tanks. Steel is a strong and durable material that is commonly used in the construction of storage tanks due to its high tensile strength and resistance to corrosion. Steel round bars can be shaped and welded together to form the structure of the tank, providing stability and support. Additionally, steel tanks can be customized to meet specific storage requirements, making them a versatile choice for various industries.

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