HIGH QUALITY HOT ROLLED ROUND BAR Q235 ou Q195

HIGH QUALITY HOT ROLLED ROUND BAR Q235 ou Q195 System 1

HIGH QUALITY HOT ROLLED ROUND BAR Q235 ou Q195

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 20000000 m.t./month

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Round bar Details:

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

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

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

HIGH QUALITY HOT ROLLED ROUND BAR Q235 ou Q195

Q: Are steel round bars available in different colors?: Steel round bars typically come in a metallic grey color, which is the natural color of the steel material. However, it is possible to find steel round bars in different colors through various processes such as powder coating or painting. These processes involve applying a layer of paint or powder to the surface of the steel, which can be done in a wide range of colors. This allows for customization and aesthetic considerations, especially in applications where the appearance of the steel is important. It is important to note that the availability of different colors may vary depending on the supplier or manufacturer.

Q: What are the typical hardness values for different grades of steel round bars?: The hardness values for different grades of steel round bars can vary depending on the specific grade and the manufacturing process used. However, there are some typical hardness values that can be used as a general guideline. For low carbon or mild steel round bars, the typical hardness values range from about 120 to 250 Brinell Hardness (HB). These grades of steel are known for their relatively low strength and hardness but can be easily machined and welded. Medium carbon steel round bars, commonly used in applications that require higher strength and hardness, typically have hardness values ranging from about 200 to 400 HB. These grades of steel are often used in construction, automotive, and machinery industries. High carbon or alloy steel round bars, which offer even greater strength and hardness, can have hardness values ranging from 400 to 700 HB or even higher. These grades of steel are commonly used in applications that require high wear resistance, such as cutting tools, gears, and bearings. It is important to note that these hardness values are approximate and can vary depending on factors such as heat treatment, alloy composition, and the specific manufacturing process employed. Therefore, it is always recommended to consult the manufacturer's specifications or conduct hardness testing to determine the exact hardness values for a specific grade of steel round bar.

Q: How about tempering No. 45 round bar?: Quenched and tempered steel has two major categories: carbon quenched and tempered steel and alloy quenched and tempered steel. Carbon steel or alloy steel, the control of carbon content is relatively strict. If the carbon content is too high, after quenching and tempering the strength of the workpiece is high, but the toughness is not enough, such as carbon content is too low, toughness and lack of strength. In order to make the quenched and tempered parts get good comprehensive performance, the total carbon content is controlled at 0.30~0.50%.

Q: Can steel round bars be coated with protective finishes?: Steel round bars can indeed have protective finishes applied to them. Applying protective finishes to steel round bars is a widespread practice aimed at improving their durability and resistance to corrosion. There are several options available for protective finishes, such as galvanizing, powder coating, and epoxy coating, among others. These finishes effectively safeguard the steel bars against rust and deterioration, thus prolonging their lifespan and enabling them to perform well in different environments. The selection of a protective finish depends on various factors, including the intended use of the steel round bars, the extent of exposure to moisture or corrosive substances, and the desired aesthetic appeal.

Q: How do you measure the straightness tolerance of a steel round bar?: To measure the straightness tolerance of a steel round bar, you can use a straightness measuring instrument such as a straight edge or a laser alignment tool. By placing the instrument along the length of the bar, any deviations from straightness can be observed and measured. The maximum allowable deviation from a perfectly straight line, known as the straightness tolerance, is typically specified in the industry standards or customer requirements.

Q: What are the different heat treatment processes used for steel round bars?: There are several heat treatment processes that are commonly used for steel round bars to enhance their mechanical properties and improve their overall performance. These processes include annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing: This process involves heating the steel round bars to a specific temperature and then cooling it slowly to relieve internal stresses and improve its ductility. Annealing also refines the grain structure of the steel, making it softer and more workable. 2. Normalizing: Similar to annealing, normalizing involves heating the steel round bars to a specific temperature, but in this case, it is cooled in still air. Normalizing helps to refine the grain structure and improve the steel's mechanical properties, such as strength and toughness. 3. Quenching: Quenching is a rapid cooling process that involves immersing the steel round bars in a quenching medium, such as oil, water, or polymer. This process is used to achieve high hardness and strength by transforming the steel's microstructure, known as martensite formation. However, quenching can also make the steel more brittle, so it is often followed by tempering. 4. Tempering: Tempering is a heat treatment process that involves reheating the quenched steel round bars to a specific temperature and then cooling it slowly. This process helps to reduce the brittleness caused by quenching and improves the steel's toughness and ductility. The temperature and duration of tempering can be adjusted to achieve the desired mechanical properties. 5. Case hardening: Case hardening is a surface heat treatment process used to increase the hardness and wear resistance of the steel round bars. It involves introducing carbon or other alloying elements to the surface of the steel and then heating it to a specific temperature. This process forms a hardened outer layer while maintaining a tough core. These different heat treatment processes provide steel round bars with a wide range of mechanical properties and performance characteristics, allowing them to be used in various applications, including automotive, construction, manufacturing, and aerospace industries. The specific heat treatment process selected depends on the desired properties, the steel composition, and the intended application of the round bars.

Q: What are the different packaging options for steel round bars?: The different packaging options for steel round bars usually include bundles, wooden crates, or steel frames.

Q: Are steel round bars suitable for use in the manufacturing of fittings?: Certainly! Steel round bars are a fitting manufacturer's dream. They possess a myriad of advantages that make them the top choice for creating fittings. Firstly, steel is renowned for its outstanding strength and durability, rendering it perfect for crafting dependable and enduring fittings. These round bars are capable of enduring heavy loads and high pressure, ensuring that the fittings operate effectively across a range of applications. Moreover, steel round bars are incredibly versatile, easily assuming different shapes and forms to accommodate various fittings designs. This adaptability empowers manufacturers to fashion fittings that meet precise requirements and dimensions, guaranteeing a flawless fit for diverse systems and structures. Additionally, steel's resistance to corrosion is paramount for fittings that may encounter moisture or other corrosive substances. The anti-corrosion properties of steel guarantee that fittings maintain their structural integrity and functionality over time, even in the harshest environments. Furthermore, steel round bars are conveniently available in an extensive array of sizes, grades, and finishes. This abundance of options equips manufacturers with ample choices to meet different specifications and design preferences. To conclude, steel round bars are the ideal choice for manufacturing fittings due to their strength, durability, versatility, corrosion resistance, and availability. These attributes make steel round bars a reliable and efficient material for crafting high-quality fittings that can withstand various operating conditions and deliver long-lasting performance.

Q: What are the different types of steel round bar surface finishes for improved lubricity?: To enhance lubricity, there exists a variety of surface finishes for steel round bars. 1. Achieving a smooth finish involves employing grinding or polishing techniques to create a sleek surface. This reduces friction and serves as a solid foundation for applying lubricants. 2. Chrome plating entails electroplating a layer of chromium onto the round bar's surface. This results in a hard, smooth, and corrosion-resistant coat that offers exceptional lubricity. Chrome plating is frequently employed in applications necessitating low friction and wear resistance. 3. Nitriding, a surface hardening process, involves diffusing nitrogen into the round bar's surface. This generates a robust layer that amplifies the steel's lubricity. Nitriding is commonly utilized when high wear resistance and improved lubrication are imperative. 4. Black oxide, a chemical conversion coating, forms a black surface on the steel round bar. This finish provides a thin layer of protection against corrosion along with enhanced lubricity. Black oxide is frequently favored in applications that require lubricity without a decorative appearance. 5. Teflon coating, also known as PTFE (polytetrafluoroethylene) coating, involves applying a thin layer of Teflon onto the round bar's surface. This coating offers exceptional lubricity and low friction properties. Teflon coating is often employed in industries like food processing or packaging that necessitate non-stick properties. These examples showcase the various steel round bar surface finishes that can be utilized to enhance lubricity. The choice of finish depends on specific application requirements and the desired level of lubrication and wear resistance.

Q: How are steel round bars used in the construction of transmission towers?: Transmission towers commonly use steel round bars due to their strength, durability, and ease of fabrication. These bars, typically made from high-strength carbon steel, come in various diameters to meet different structural needs. In transmission tower construction, steel round bars serve as the primary structural elements. They form the vertical and diagonal members that provide strength and stability to the tower. The bars are connected using welding or bolted connections to create the lattice structure of the tower. The round shape of the bars allows for even distribution of forces, making them ideal for handling the loads and stresses experienced by transmission towers. These loads include the tower's weight, electrical conductors, and environmental factors like wind, ice, and seismic forces. Moreover, steel round bars offer excellent corrosion resistance, which is crucial for transmission towers exposed to harsh weather conditions. This resistance helps extend the tower's lifespan and ensures the safety and reliability of the transmission lines. Additionally, steel round bars can be easily fabricated and customized to meet the specific design requirements of the transmission tower. They can be cut, bent, and shaped to the desired dimensions, providing flexibility in tower design and construction. In conclusion, steel round bars play a crucial role in the construction of transmission towers by providing strength, durability, and corrosion resistance. Their versatility and ability to withstand various loads make them an essential component in ensuring the safe and reliable transmission of electricity.

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