FLAT BAR 20-200

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Product Description:

Specification of Mild Steel Flat Bar

Commodity: Mild Steel Flat Bar

Standard: GB;JIS

Material: Q195-235;SS400

Brand name: FLATSPACE

Origin place: China

Thickness: 3mm-30mm

Width:20mm-200mm

Length: Max 12m

Certification: SGS/BV

Chemical composition of Q235

Alloy No

Grade

Element(%)

Q235

0.12—0.20

0.3—0.7

≤0.045

≤0.3

Physical properties of Q235

Alloy No	Grade	Yielding strength point(Mpa)				Tensile strength (Mpa)	Elongation after fracture(%)
		Thickness (mm)					Thickness (mm)
		≤16	＞16--40	＞40--60	＞60--100		≤16	＞16--40	＞40--60	＞60--100
		≥					≥
Q235	B	235	225	215	205	375--500	26	25	24	23

Usage/Applications of Mild Steel Flat Bar

Widely used for construction, Machinery manufacturing, Iron tower steel structure, Shipbuilding; Steel grating, Staircase, Bridge, Viaduct, Railway spare parts, Boilers making etc.

Packaging & Delivery of Mild Steel Flat Bar

Packaging Details: The Mild Steel Flat Bars are packed in bundles and loaded in 20 feet/40 feet container, or shipped by bulk cargo ,also we can do as customer's requirements.

Delivery Details:30~45 days upon the receipt of buyer payment by T.T. or L/C.

Production Flow of Mild Steel Flat Bar

The Mild steel flat bar is made through three processes:

1.Feeding the material: Feeding the row material (the steel plate) to Slitting Line.

2.Slitting:The steel plate would be slitted into expected width by lengthways cutter.

3. Leveled and cutting: The plat bar would be ground into level by the grinder and then cut into required length

Q: Are steel flat bars suitable for structural applications?: Yes, steel flat bars are suitable for structural applications. They are commonly used in the construction industry for various structural purposes such as beams, columns, and braces. Steel flat bars offer several advantages that make them suitable for structural applications. Firstly, steel is known for its strength and durability, and this applies to flat bars as well. They have a high tensile strength, which allows them to withstand heavy loads and provide structural stability. Steel flat bars also have excellent resistance to bending and twisting forces, making them reliable for structural applications. Additionally, steel flat bars are versatile and can be easily modified or fabricated to meet specific design requirements. They can be cut, welded, drilled, and shaped to create various structural components, offering flexibility in construction projects. Moreover, steel flat bars are available in different sizes and thicknesses, allowing for customization to suit specific structural needs. Furthermore, steel is a cost-effective material for structural applications. It is readily available and has a long lifespan, reducing the need for frequent maintenance or replacements. Steel also has good fire resistance properties, which is crucial for ensuring the safety of structures. In conclusion, steel flat bars are indeed suitable for structural applications due to their strength, durability, versatility, and cost-effectiveness. They are widely used in the construction industry and offer numerous benefits that make them a reliable choice for various structural components.

Q: Can steel flat bars be galvanized?: Indeed, steel flat bars have the capability to undergo galvanization. Galvanization, a technique employed to shield steel against rusting and corrosion, involves the application of a safeguarding zinc coating. This procedure is typically executed by either immersing the steel in a bath of molten zinc or through electroplating. The act of galvanizing steel flat bars aids in augmenting their sturdiness and longevity, particularly when utilized in outdoor or corrosive settings.

Q: What are the different standards or specifications for steel flat bars?: There are several different standards and specifications for steel flat bars, which outline the specific requirements and characteristics of these products. Some of the most commonly used standards include: 1. ASTM A36/A36M: This standard covers carbon structural steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges, buildings, and general structural purposes. It specifies the chemical composition, mechanical properties, and various other requirements for steel flat bars. 2. ASTM A572/A572M: This standard covers high-strength low-alloy columbium-vanadium structural steel shapes, plates, sheet piling, and bars for applications in bolted, welded, and riveted structures. It specifies the chemical composition, mechanical properties, and other relevant characteristics for steel flat bars. 3. ASTM A1011/A1011M: This standard covers hot-rolled carbon steel sheets, strips, and bars for general applications. It includes specifications for steel flat bars, including the chemical composition, mechanical properties, and other relevant requirements. 4. JIS G3101: This Japanese standard specifies the general requirements for hot-rolled steel plates, sheets, and strips used in general structural applications. It provides guidelines for steel flat bars, including the chemical composition, mechanical properties, and other important specifications. 5. EN 10025: This European standard specifies the technical delivery conditions for structural steel products, including steel flat bars. It outlines the requirements for steel grades, chemical composition, mechanical properties, and other relevant characteristics. These are just a few examples of the numerous standards and specifications available for steel flat bars. The choice of standard depends on the specific application and requirements of the project, ensuring that the steel flat bars meet the desired quality and performance standards.

Q: What are the tolerances for steel flat bars?: The tolerances of steel flat bars may differ based on the specific requirements and standards set by the manufacturer or customer. However, typically, the tolerances for steel flat bars are measured in terms of thickness, width, and length. Concerning the thickness tolerance, it is customary to have a specific range in which the flat bar's thickness should fall. This range can vary depending on the grade and type of steel used, but it is usually specified as a plus or minus value. Similarly, the width tolerance denotes the acceptable variation in the width of the steel flat bar. This tolerance is usually specified as a plus or minus value, allowing for a certain range of deviation from the desired width. Lastly, the length tolerance determines the acceptable variation in the length of the steel flat bar. This tolerance is often specified as a maximum or minimum deviation from the desired length. It is crucial to note that the precise tolerances for steel flat bars may vary depending on the application and industry standards. Consequently, it is important to refer to the relevant specifications or standards provided by the manufacturer or customer to ascertain the exact tolerances required for a specific steel flat bar.

Q: What are the different heat treatment processes for steel flat bars?: There are several heat treatment processes that can be applied to steel flat bars to enhance their mechanical properties and improve their overall performance. Some of the commonly used heat treatment processes for steel flat bars include: 1. Annealing: This process involves heating the steel flat bar to a specific temperature and then slowly cooling it to room temperature. Annealing helps to relieve internal stresses, increase ductility, and improve machinability. 2. Normalizing: This heat treatment process involves heating the steel flat bar to a temperature above its critical range and then allowing it to cool in air. Normalizing helps to refine the grain structure, improve mechanical properties, and enhance the overall toughness of the steel. 3. Quenching and tempering: This two-step process involves rapid cooling, or quenching, the steel flat bar in a liquid medium, such as oil or water, to achieve high hardness. This is followed by tempering, which involves reheating the quenched steel to a lower temperature to reduce brittleness and improve toughness. 4. Case hardening: Also known as carburizing, this process involves adding carbon to the surface of the steel flat bar by heating it in a carbon-rich environment. Case hardening creates a hard outer layer while maintaining a softer and more ductile core, enhancing wear resistance and providing a tough surface. 5. Stress relieving: This heat treatment process is used to reduce residual stresses in the steel flat bar that may have accumulated during manufacturing or other processes. It involves heating the steel to a specific temperature and allowing it to cool slowly. Stress relieving helps to minimize distortion and improve dimensional stability. These heat treatment processes can be tailored to meet specific requirements and desired mechanical properties of the steel flat bars, making them suitable for a wide range of applications in various industries.

Q: What are the different testing methods used for quality control of steel flat bars?: There are several testing methods used for quality control of steel flat bars. These methods are employed to ensure that the steel bars meet the required standards and specifications. Some of the commonly used testing methods for quality control of steel flat bars include: 1. Visual Inspection: This is the most basic and initial testing method, where the flat bars are visually inspected for any visible defects such as cracks, surface imperfections, or unevenness. 2. Dimensional Inspection: This method involves measuring the dimensions of the steel flat bars using various tools such as calipers, micrometers, or laser measuring devices. The dimensions are compared against the specified tolerances to ensure they meet the required standards. 3. Ultrasonic Testing: This non-destructive testing method utilizes high-frequency sound waves to detect any internal defects or discontinuities in the steel flat bars. Ultrasonic waves are passed through the bars, and the reflected waves are analyzed to identify any flaws. 4. Magnetic Particle Inspection: This method is used to detect surface and near-surface defects in the steel flat bars. It involves applying a magnetic field to the bars and then applying magnetic particles, which will accumulate at areas of magnetic leakage caused by defects. 5. Dye Penetrant Testing: This method is employed to detect surface defects and cracks in the steel flat bars. A liquid dye penetrant is applied to the surface, and after a specified time, excess dye is removed. A developer is then applied, which draws out the dye from any surface defects, making them visible. 6. Tensile Testing: This destructive testing method involves subjecting a sample of the steel flat bar to tension until it fractures. The test measures the maximum load the sample can withstand and determines its tensile strength, yield strength, and elongation properties. 7. Hardness Testing: This method measures the hardness of the steel flat bars using specialized tools such as a hardness tester or a Rockwell hardness tester. The hardness values obtained help evaluate the material's strength and suitability for specific applications. 8. Chemical Analysis: This testing method involves analyzing the chemical composition of the steel flat bars to ensure they meet the required specifications. It includes determining the percentage of various elements such as carbon, manganese, sulfur, phosphorus, and others. By utilizing these testing methods, manufacturers can ensure that steel flat bars meet the necessary quality standards and are suitable for various applications in construction, manufacturing, and other industries.

Q: What are the different methods of surface hardening for steel flat bars?: There are several methods of surface hardening for steel flat bars, including case hardening, nitriding, induction hardening, flame hardening, and laser hardening.

Q: What are the different methods of cutting steel flat bars?: There are several different methods of cutting steel flat bars, each with its own advantages and applications. 1. Sawing: One of the most common methods of cutting steel flat bars is using a saw. There are several types of saws that can be used, including band saws, circular saws, and abrasive saws. Band saws are ideal for cutting larger quantities of steel bars quickly and efficiently, while circular saws are more suitable for smaller jobs or cutting through thicker bars. Abrasive saws, also known as cutoff saws, use a rotating abrasive disc to cut through the steel. 2. Shearing: Shearing is another popular method for cutting steel flat bars. It involves using a shear machine that applies a significant amount of force to cut through the material. Shearing is particularly useful for cutting through thick steel bars, as the force applied allows for a clean, straight cut. 3. Plasma cutting: Plasma cutting is a more advanced method that uses a high-velocity jet of ionized gas to melt and cut through the steel. This method is highly precise and allows for intricate shapes and designs to be cut, making it suitable for more complex cutting requirements. 4. Laser cutting: Similar to plasma cutting, laser cutting utilizes a high-powered laser beam to melt and cut through the steel. This method is incredibly accurate and can produce clean, smooth cuts. Laser cutting is often used for cutting thin steel flat bars or for precise, intricate designs. 5. Waterjet cutting: Waterjet cutting utilizes a high-pressure jet of water mixed with abrasive particles to cut through the steel. This method is versatile and can cut through a wide range of materials, including steel. It is particularly useful for cutting through thicker steel bars or for materials that may be sensitive to heat. Overall, the choice of cutting method depends on factors such as the thickness of the steel, the desired precision, and the complexity of the design. Each method has its own advantages and limitations, so it is important to consider these factors when selecting the appropriate cutting method for steel flat bars.

Q: Can steel flat bars be used for making brackets or supports for electrical installations?: Brackets or supports for electrical installations can indeed be made using steel flat bars. Steel is renowned for its robustness, longevity, and capacity to endure heavy loads. Construction and engineering projects frequently employ steel flat bars due to their adaptability and dependability. By utilizing steel flat bars for creating brackets or supports in electrical installations, a solid and stable structure can be achieved, guaranteeing the safety and stability of the electrical components. Furthermore, steel exhibits resistance to corrosion, a vital characteristic in electrical installations where exposure to moisture or harsh environments poses a concern. All in all, the strength, durability, and corrosion resistance of steel flat bars make them a fitting choice for crafting brackets or supports in electrical installations.

Q: Do lightning protection, lead out of the galvanized round steel, flat steel needs to be inspected?: The corrosion resistance of cold galvanizing is not as good as that of hot-dip galvanizing. It is used as lightning protection and grounding material. It is corroded quickly, and the grounding resistance is raised rapidly. It exceeds the required resistance.

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