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Roung  BAR

Roung BAR

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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:Can steel round bars be plated or coated?
Steel round bars can undergo plating or coating, which is a widely employed technique to enhance their appearance, durability, and resistance to corrosion. During this process, a layer of a different material is applied to the surface of the steel round bars using methods like electroplating, hot-dip galvanizing, powder coating, or painting. The choice of plating or coating material depends on the specific requirements and desired properties of the steel round bars. For instance, zinc plating is often used to provide corrosion resistance, while chrome plating can enhance their aesthetic appeal. In summary, plating or coating steel round bars can significantly enhance their performance and prolong their lifespan.
Q:What is the cost of steel round bars?
The cost of steel round bars can vary depending on factors such as the size, grade, and market conditions. It is recommended to contact suppliers or check online catalogs for the most accurate and up-to-date pricing information.
Q:Can steel round bars be painted or coated?
Yes, steel round bars can be painted or coated with various types of protective coatings to enhance their durability and prevent corrosion.
Q:What is the difference between a seamless and a precision ground steel round bar?
A solid cylindrical steel billet is heated and pierced to create a hollow tube-like structure, resulting in a seamless steel round bar. This manufacturing method guarantees a uniform outer diameter throughout the entire length of the bar, making it ideal for applications that necessitate a smooth surface finish and high dimensional accuracy. Industries such as oil and gas, automotive, and aerospace commonly employ seamless round bars. On the contrary, a precision ground steel round bar is produced by subjecting a hot-rolled or cold-drawn steel bar to precise grinding processes. These processes eliminate any surface imperfections, achieve meticulous dimensional tolerances, and provide a polished and smooth finish. Precision ground round bars are typically utilized in applications that require strict tolerances, superior surface finish, and consistent dimensions, such as in the production of machinery parts, tools, and components. In conclusion, the primary distinction between a seamless and a precision ground steel round bar lies in the manufacturing process and the resulting characteristics. Seamless round bars are formed from a hollow tube-like structure, ensuring a consistent outer diameter, whereas precision ground round bars are created by grinding a solid steel bar to achieve tight tolerances and exceptional surface finish. Both types of round bars offer their own advantages and find application in various industries based on specific requirements.
Q:What are the tolerances for steel round bars?
The tolerances for steel round bars can vary depending on the specific requirements of the application and the manufacturing process. Generally, the tolerances for steel round bars are specified in terms of diameter, straightness, and length. In terms of diameter tolerance, it is common to find tolerances ranging from +/- 0.001 inches to +/- 0.005 inches. This means that the actual diameter of the steel round bar can deviate within this range from the specified diameter. The specific tolerance will depend on the size and grade of the bar. Straightness tolerance refers to the allowable deviation in the straightness of the bar. This is typically specified as a maximum deviation per unit length, such as 0.125 inches per foot. It ensures that the bar remains straight and within acceptable limits when measured along its length. Length tolerance determines the allowable variation in the overall length of the round bar. This can range from +/- 0.125 inches to +/- 0.5 inches, depending on the size and grade of the bar. It ensures that the bar meets the required length specifications. It is important to note that these tolerances can vary depending on the industry standards, customer specifications, and the manufacturing method used. Additionally, certain applications may have more stringent tolerance requirements, especially in industries such as aerospace or automotive, where precision is critical. In summary, the tolerances for steel round bars encompass diameter, straightness, and length. The specific tolerances will depend on the size, grade, and application of the round bar, as well as any relevant industry standards or customer specifications.
Q:What are the advantages of using shock-resistant steel round bars?
There are several advantages of using shock-resistant steel round bars in various applications. Firstly, shock-resistant steel round bars are designed to withstand high impact and shock loads, making them ideal for use in industries such as construction, automotive, and manufacturing. This property of shock resistance ensures that the round bars remain intact and maintain their structural integrity even under extreme conditions. Another advantage of shock-resistant steel round bars is their enhanced durability. These round bars are made from high-quality steel alloys that have been specifically engineered to provide superior strength and resistance to wear and tear. This makes them highly resistant to bending, cracking, and fracture, ensuring a longer lifespan compared to regular steel round bars. Additionally, shock-resistant steel round bars offer improved safety in applications where there is a risk of impact or sudden loads. By using these round bars, the likelihood of structural failure or catastrophic accidents is significantly reduced, providing a greater level of security for both workers and the overall operation. Moreover, shock-resistant steel round bars are known for their excellent machinability and weldability. This means that they can be easily shaped, cut, and welded to meet specific requirements, allowing for versatility in design and manufacturing processes. This ease of manipulation makes them a preferred choice for various projects where customization is necessary. Furthermore, shock-resistant steel round bars offer cost-effective solutions. Due to their high durability and resistance to wear, they require less frequent replacements, resulting in reduced maintenance and replacement costs. Additionally, their ability to withstand shock loads reduces the need for additional reinforcement or support structures, further reducing overall project expenses. In conclusion, the advantages of using shock-resistant steel round bars include high impact resistance, enhanced durability, improved safety, excellent machinability, and cost-effectiveness. These properties make them a reliable and efficient choice for a wide range of applications, ensuring long-lasting and reliable performance.
Q:What are the different types of steel alloy compositions used for round bars?
There are several different types of steel alloy compositions used for round bars, each with its own unique properties and applications. Some of the most common steel alloy compositions used for round bars include: 1. Carbon Steel: This is the most basic and widely used type of steel alloy composition for round bars. It primarily consists of iron and carbon, with small amounts of other elements. Carbon steel round bars are known for their strength, durability, and affordability. 2. Alloy Steel: This type of steel alloy composition contains additional alloying elements such as manganese, chromium, nickel, or molybdenum. Alloy steel round bars offer enhanced strength, hardness, and resistance to wear, making them suitable for applications that require high performance and durability. 3. Stainless Steel: Stainless steel round bars are composed primarily of iron, chromium, and nickel. This composition gives them excellent corrosion resistance and makes them suitable for applications in environments with high moisture or chemical exposure. Stainless steel round bars are also known for their aesthetic appeal and are commonly used in architectural and decorative applications. 4. Tool Steel: Tool steel round bars are specifically designed to have exceptional hardness, toughness, and wear resistance. They are often used in the production of cutting tools, dies, and molds. Tool steel compositions typically include elements such as tungsten, vanadium, or cobalt to enhance their performance in specific applications. 5. Duplex Steel: Duplex steel round bars are a type of stainless steel that contains a balanced combination of austenitic and ferritic microstructures. This composition gives them excellent strength and corrosion resistance, making them suitable for applications in demanding environments, such as offshore oil and gas industry. 6. High-Speed Steel: High-speed steel round bars are designed to withstand high temperatures and maintain their hardness and toughness at elevated speeds. They are commonly used in the production of cutting tools, drills, and milling cutters. High-speed steel compositions typically contain elements such as tungsten, molybdenum, or cobalt. These are just a few examples of the different types of steel alloy compositions used for round bars. The choice of composition depends on the specific application, desired properties, and performance requirements.
Q:What are the typical dimensions of a steel round bar?
The dimensions of a steel round bar can vary depending on the specific application and industry requirements. Generally, diameter sizes for steel round bars range from 1/4 inch to 24 inches. These sizes are often measured in increments of 1/8 inch or 1/4 inch. The length of a steel round bar is usually standardized at 20 feet, although shorter lengths may also be available. It is important to consider that these dimensions can significantly differ based on the grade and type of steel used, as well as the manufacturing process. Therefore, it is crucial to refer to the appropriate industry standards or consult a supplier for precise dimensions required for a particular project.
Q:What is the difference between a seamless and a welded steel round bar?
The main difference between a seamless and a welded steel round bar lies in their manufacturing process and the resulting structural integrity. A seamless steel round bar is produced by piercing a solid billet of steel and then rolling it into a round shape. This process ensures that there are no seams or welds in the bar, resulting in a smooth and continuous surface throughout its length. The absence of a weld eliminates the potential weaknesses and vulnerabilities associated with welded joints. Seamless steel bars are typically more uniform in composition and have a higher strength-to-weight ratio due to the absence of welds. On the other hand, a welded steel round bar is created by joining multiple pieces of steel together using various welding techniques. The steel pieces are heated and fused together at the edges to form a continuous bar. While the welding process provides flexibility in terms of length and diameter options, the presence of a weld can introduce certain structural concerns. Welded joints may be prone to defects, such as porosity or inclusions, which can compromise the overall strength and integrity of the bar. However, advancements in welding technology and quality control have significantly improved the reliability of welded steel round bars. In terms of applications, seamless steel round bars are often preferred in critical industries where high strength, reliability, and resistance to corrosion are essential. These industries may include oil and gas, aerospace, and automotive sectors. Welded steel round bars, on the other hand, are commonly used in less demanding applications where cost-effectiveness and availability are primary factors, such as construction, manufacturing, and general engineering. In summary, the key differences between seamless and welded steel round bars lie in their manufacturing process and resulting structural characteristics. Seamless bars are produced without any welds, offering a smoother surface, higher strength-to-weight ratio, and greater resistance to defects. Welded bars, while more cost-effective and readily available, may have weld-related vulnerabilities that need to be considered depending on the application. Ultimately, the choice between the two depends on the specific requirements and priorities of the intended use.
Q:Can steel round bars be used for making stabilizer bars?
Yes, steel round bars can be used for making stabilizer bars. Steel is a commonly used material in the automotive industry due to its high strength, durability, and resistance to deformation. Stabilizer bars, also known as sway bars, are components in a vehicle's suspension system that help to reduce body roll and improve stability during cornering. These bars are subjected to significant forces and need to be able to withstand the load. Steel round bars provide the necessary strength and stiffness required for stabilizer bars to effectively perform their function. Additionally, steel is readily available and cost-effective, making it a popular choice for manufacturing stabilizer bars in the automotive industry.

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