High quality round bar 5-100

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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Product Description:

High Quality Round Bar Details:

Minimum Order Quantity:	25 Tons	Unit:	m.t.	Loading Port:	Tianjin
Supply Ability:	500 Tons Per Day	Payment Terms:	TT or L/C

Product Description:

Specifications of High Quality Round Bar

1. Grade: GB, JIS, ASTM, EN

2. Grade: Q235, SS400, A36, S235JR

3. Diameter and mass: As below

Diameter	Mass	Diameter	Mass	Diameter	Mass
(mm)	(kg/m)	(mm)	(kg/m)	(mm)	(kg/m)
6	0.22	22	2.98	53	17.30
7	0.30	24	3.55	56	19.30
8	0.40	25	3.85	60	22.20
9	0.50	26	4.17	63	24.50
10	0.62	28	4.83	65	26.00
11	0.75	30	5.55	70	30.20
12	0.89	32	6.31	75	34.70
13	1.04	34	7.13	80	39.50
14	1.21	36	7.99	85	44.50
15	1.39	38	8.90	90	49.90
16	1.58	40	9.86	95	55.60
17	1.78	42	10.90	100	61.70
18	2.00	45	12.50	120	88.85
19	2.23	48	14.20	140	120.93
20	2.47	50	15.40	150	138.82

4. Material: Mild Steel

5. Heat treatment of high quality steel:

Fire: Isothermal annealing temperature is 800 ~ 880 °C, with 10 ~ 20 °C, the furnace cooling to about 600 °C, hardness above HB269.

Preheat temperature: 730-730 °C

Quenching temperature: 1190-1210 °C

Tempering temperature: 540-595 °C

Cold drawn, hardness 285 HBS

Cold drawn after annealing condition, hardness 277 HBS

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

Usage and Applications of High Quality Round Bar

1) Suitable for making various strong cutting tool abrasion resistance, impact resistance.

2) Used to produce all kinds of high hard and super hard saw blade, drill, tap, broach, gear hob and various kinds of milling cutter.

3) Used for advanced punching die, screw die, and the toughness and complicated shape of the punch, etc.

4) Is used for cold forging die and drawing mode, etc.

5) Recommended watchcase factory, screw factory and other cold stamping products industry use.

Packaging & Delivery of High Quality Round Bar

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: Theprice 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.

Production Flow of High Quality Round Bar

The common processes are preheated forging quenching, dual refinement solution process, cooling quenching and isothermal quenching. We use heat treatment for dual refinement solution process. The main measures process is high temperature solution and refinement cycle. High temperature solution can improve the carbide morphology and particle size. The aim is to make the loop refinement ultrafine austenite grains

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: Can steel round bars be used for making transmission towers?: Yes, steel round bars can be used for making transmission towers. Steel round bars are often used in the construction industry due to their strength, durability, and versatility. Transmission towers require materials that can withstand extreme weather conditions, support heavy loads, and provide structural stability. Steel round bars are able to meet these requirements, making them a suitable choice for the construction of transmission towers. Additionally, steel round bars can be easily fabricated and welded, allowing for efficient construction and installation of transmission towers.

Q: Can steel round bars be used for making bicycle frames?: Yes, steel round bars can be used for making bicycle frames. Steel is a commonly used material for bicycle frames due to its strength, durability, and relatively low cost. Steel round bars can be shaped and welded together to create a sturdy and rigid frame that provides stability and support for the rider.

Q: What is the difference between a rough turned and a precision ground steel round bar?: A rough turned steel round bar is a raw material that has undergone minimal machining, leaving a slightly rough surface finish. It is typically used for applications where a high level of precision is not required, such as structural components. On the other hand, a precision ground steel round bar is a finished product that has undergone precise machining to achieve a smooth and accurate surface finish. This process ensures tight dimensional tolerances and a consistent diameter throughout the length of the bar. Precision ground bars are commonly used in applications that require close dimensional control and a high level of accuracy, such as in machinery and tooling.

Q: What are the factors to consider when selecting a steel round bar for a specific application?: When selecting a steel round bar for a specific application, there are several important factors to consider. 1. Material Grade: The first factor to consider is the material grade of the steel round bar. Different grades of steel have varying properties, such as strength, hardness, and corrosion resistance. It is crucial to choose a material grade that is suitable for the specific application's requirements. 2. Mechanical Properties: The mechanical properties of the steel round bar, such as tensile strength, yield strength, and elongation, need to be evaluated. These properties determine the bar's ability to withstand forces and deformations under load. The selected steel round bar should have mechanical properties that match the demands of the application. 3. Size and Dimensions: The size and dimensions of the steel round bar are crucial considerations. This includes the diameter, length, and tolerance requirements. The dimensions should be chosen based on the application's structural requirements and the intended load-bearing capacity of the bar. 4. Surface Finish: The surface finish of the steel round bar is significant, especially for applications involving aesthetics or contact with other components. Considerations such as smoothness, roughness, and the presence of any coatings or treatments should be taken into account. 5. Corrosion Resistance: Depending on the application's environment, it is essential to select a steel round bar with adequate corrosion resistance. Factors such as exposure to moisture, chemicals, or extreme temperatures can affect the bar's longevity and performance. Stainless steel or corrosion-resistant coatings can be chosen to enhance the bar's resistance to corrosion. 6. Machinability: If the steel round bar needs to be machined or fabricated into a specific shape, its machinability must be considered. Some steel grades are easier to machine, while others may require more advanced tools or techniques. The machinability of the selected bar should align with the desired manufacturing processes. 7. Cost: Finally, the cost of the steel round bar should be considered. Different material grades and specifications come with varying price points. It is important to balance the required properties and performance with the project's budget constraints. Overall, selecting a steel round bar for a specific application requires careful evaluation of the material grade, mechanical properties, size, surface finish, corrosion resistance, machinability, and cost. By considering these factors, one can ensure that the chosen steel round bar will meet the application's requirements and deliver optimal performance.

Q: Can steel round bars be used in the manufacturing of kitchenware?: Yes, steel round bars can be used in the manufacturing of kitchenware. Steel is a durable and versatile material that can be easily molded into various shapes and sizes. It is commonly used in the production of kitchen utensils, cookware, and cutlery due to its strength, corrosion resistance, and heat conductivity.

Q: How do you straighten steel round bars?: To straighten steel round bars, you can use a variety of methods depending on the level of precision required and the size of the bars. Here are a few common techniques: 1. Manual Straightening: This method is suitable for smaller diameter round bars. Place the bar on a flat surface and apply pressure to the bent section using a hydraulic or manual press. Gradually increase the force until the bar is straightened. This technique is relatively simple but may not yield perfect results. 2. Heat Straightening: Heat straightening is effective for larger diameter round bars or bars with severe bends. Heat the bent section using an oxy-acetylene torch until it becomes red hot. Once heated, apply pressure in the opposite direction of the bend using hydraulic or manual tools. The heat softens the steel, allowing it to be manipulated easier. Be cautious not to overheat the steel, as it may weaken its structural integrity. 3. Roller Straightening: This method is commonly used in industrial settings and is suitable for larger diameter round bars. The bar is passed through a series of rollers that apply pressure to the bent section, gradually straightening it. This technique provides precise and uniform results but requires specialized equipment. 4. Hydraulic Press Straightening: For precision straightening, a hydraulic press can be used. Place the bar between two parallel plates and apply pressure using the hydraulic press. Gradually increase the force until the bar is straightened. This method is suitable for bars with minor bends and allows for precise control over the straightening process. It is essential to note that while these methods can straighten steel round bars, the effectiveness may vary depending on the severity of the bend, the quality of the steel, and the equipment used. It is advisable to consult with a professional or follow industry-specific guidelines to ensure safe and accurate straightening of steel round bars.

Q: What are the different cutting methods used for steel round bars?: The cutting of steel round bars can be done using various methods, depending on the specific requirements and available tools. Here are some commonly used cutting methods: 1. Sawing: Traditional sawing using a saw blade is a cost-effective and simple method suitable for smaller diameter round bars. 2. Abrasive Cutting: When cutting thicker and harder steel bars, abrasive cutting with an abrasive wheel or disc proves to be highly effective. It is often used in industrial applications where precision and speed are crucial. 3. Plasma Cutting: This thermal cutting method involves using a high-velocity jet of ionized gas to melt and remove the metal. It is suitable for cutting steel bars of different thicknesses and is renowned for its speed and precision. 4. Laser Cutting: Laser cutting is an efficient and precise method that utilizes a high-powered laser beam to melt and vaporize the metal. It is commonly employed for cutting intricate shapes and patterns in steel round bars. 5. Waterjet Cutting: Waterjet cutting utilizes a high-pressure stream of water mixed with an abrasive material to cut through steel bars of varying thicknesses and types. It is a versatile method. 6. Shearing: This cutting method involves using specialized machine blades to swiftly and accurately cut smaller diameter round bars. When considering the cutting method for steel round bars, it is crucial to carefully assess the project's specific requirements and consult with experts to determine the most suitable approach.

Q: What is the maximum weight of a steel round bar?: The maximum weight of a steel round bar depends on its diameter and length. Steel round bars come in various sizes and weights, so it is important to specify the dimensions in order to determine the maximum weight. The weight of a steel round bar can be calculated using the formula: weight = volume × density, where volume can be calculated as πr²h (pi times the square of the radius times the height) and density is the specific weight of steel (approximately 7850 kg/m³). By plugging in the appropriate values, you can calculate the maximum weight of a steel round bar.

Q: Are steel round bars suitable for bridge construction applications?: Yes, steel round bars are commonly used in bridge construction applications. Steel round bars offer several advantages for bridge construction, including high strength, durability, and versatility. They can withstand heavy loads and provide the necessary structural support required for bridges. Additionally, steel round bars can be easily fabricated and welded, allowing for efficient construction processes. The use of steel round bars in bridge construction also ensures that the bridges are resistant to corrosion, which is particularly important in environments exposed to moisture or harsh weather conditions. Overall, steel round bars are a suitable and commonly used material in bridge construction applications due to their strength, durability, versatility, and resistance to corrosion.

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