High-Quality Round Bar

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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: The price 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 different types of steel round bars used in the manufacturing of shafts?: There are several different types of steel round bars that are commonly used in the manufacturing of shafts. The choice of steel round bar depends on the specific requirements and application of the shaft. Here are some of the most commonly used types: 1. Carbon Steel Round Bars: These are the most common type of steel round bars used in shaft manufacturing. Carbon steel offers good strength and toughness, making it suitable for various shaft applications. 2. Alloy Steel Round Bars: Alloy steel round bars are made by adding other elements such as chromium, nickel, or molybdenum to carbon steel. This enhances the strength, hardness, and wear resistance of the shaft, making it suitable for demanding applications. 3. Stainless Steel Round Bars: Stainless steel is highly corrosion resistant and offers excellent mechanical properties. It is commonly used in shafts that require resistance to corrosion, high temperatures, or harsh environments. 4. Tool Steel Round Bars: Tool steel round bars are known for their exceptional hardness, toughness, and wear resistance. They are used in shafts for cutting tools, molds, and dies that require high performance and durability. 5. High-Speed Steel Round Bars: High-speed steel round bars are primarily used in shafts for cutting tools such as drills, mills, and taps. They have excellent heat resistance and can withstand high cutting speeds without losing their hardness. 6. Mild Steel Round Bars: Mild steel round bars are low carbon steel bars that offer good weldability and machinability. They are commonly used in shafts for less demanding applications that do not require high strength or hardness. It is important to consider the specific requirements, such as strength, hardness, corrosion resistance, and temperature resistance, when selecting the appropriate type of steel round bar for manufacturing shafts.

Q:What are the different types of steel round bars used in the automotive steering systems?: There are several types of steel round bars used in automotive steering systems, including carbon steel, alloy steel, and stainless steel. Carbon steel round bars are commonly used due to their affordability and high strength properties. Alloy steel round bars are used when higher strength and durability are required, as they have additional alloying elements such as chromium, nickel, and molybdenum. Stainless steel round bars are preferred for their corrosion resistance properties, making them suitable for steering components exposed to harsh environments or moisture.

Q:What is the difference between a smooth and a deformed steel round bar?: The main difference between a smooth and a deformed steel round bar lies in their surface texture. A smooth steel round bar has a plain and even surface, typically free from any ridges or indentations. On the other hand, a deformed steel round bar has intentional deformations or patterns on its surface, such as ribs, bumps, or grooves. These deformations provide enhanced bonding with concrete or other materials, increasing the bar's grip and preventing slippage. Deformed steel round bars are commonly used in construction projects that require reinforced concrete structures, while smooth steel round bars are often employed in applications where surface texture is not a crucial factor.

Q:Can steel round bars be used in the fabrication of machinery?: Certainly, machinery fabrication can indeed utilize steel round bars. In the manufacturing industry, steel round bars are widely employed for a multitude of purposes, including the creation of machinery and equipment components. They possess numerous favorable qualities that render them suitable for this application. To begin with, steel round bars offer exceptional strength and durability. They are renowned for their high tensile strength, enabling them to withstand heavy loads and resist deformation. This strength is crucial in machinery fabrication, as the components must endure the stresses and forces encountered during operation. Moreover, steel round bars possess excellent machinability, allowing them to be easily shaped and formed into desired machinery components. This versatility permits the creation of intricate and complex machine parts. Furthermore, steel round bars exhibit remarkable resistance to corrosion and wear, which is vital in machinery fabrication. Machinery often operates in harsh environments or comes into contact with substances such as chemicals, oils, or abrasive materials. The corrosion and wear resistance of steel round bars ensure that the fabricated machinery can endure these conditions and maintain optimal performance over time. Lastly, steel round bars are readily available and cost-effective. They can be easily obtained from suppliers and manufacturers, making them a practical and economical choice for machinery fabrication. Overall, steel round bars are a favored and dependable material for machinery fabrication. Their strength, machinability, resistance to corrosion and wear, as well as their availability, make them an ideal option for creating durable and high-performing machine components.

Q:What are the different types of steel round bars used in the automotive suspension systems?: Automotive suspension systems utilize various types of steel round bars, each with its own distinct properties and benefits. 1. Carbon steel round bars, which are the most commonly employed in automotive suspension systems, offer excellent strength and durability. Their ability to withstand the weight and stress of vehicles make them an ideal choice. Additionally, carbon steel round bars boast exceptional machinability, allowing for easy customization and fabrication. 2. Alloy steel round bars are created by incorporating different alloying elements, such as chromium, nickel, or molybdenum, into carbon steel. This enhances their mechanical properties, resulting in increased strength, hardness, and wear resistance. These alloy steel round bars are frequently utilized in crucial suspension components like control arms or sway bars. 3. Stainless steel round bars are renowned for their resistance to corrosion and aesthetic appeal. Although not as prevalent in automotive suspension systems, they find application in specific scenarios where protection against rust or chemical exposure is necessary. Furthermore, stainless steel round bars offer considerable strength and high temperature resistance, making them suitable for specific suspension components. 4. High-strength steel round bars are explicitly designed to provide exceptional strength and toughness. These bars are commonly employed in demanding suspension applications, including heavy-duty trucks or performance vehicles, which require increased load-bearing capacity and enhanced resistance to fatigue. 5. Forged steel round bars are distinguished by their exceptional strength and structural integrity. They are formed by subjecting the steel to high temperatures and shaping it under immense pressure. This manufacturing process results in a dense and uniform structure, rendering forged steel round bars highly reliable and suitable for rigorous suspension systems. In conclusion, automotive suspension systems utilize several types of steel round bars, including carbon steel, alloy steel, stainless steel, high-strength steel, and forged steel. Each type possesses unique properties and advantages tailored to the specific requirements of various suspension components.

Q:What are the advantages of using free-cutting steel round bars?: There are several advantages of using free-cutting steel round bars. Firstly, free-cutting steel round bars are known for their excellent machinability. They are specifically designed to be easily machined, allowing for smooth and efficient cutting, drilling, and shaping processes. This makes them ideal for applications where precision and intricate detailing are required, such as in the manufacturing of automotive components, machinery parts, and precision instruments. Secondly, free-cutting steel round bars offer improved productivity and reduced manufacturing costs. The enhanced machinability of these bars significantly reduces the time and effort required to machine them, resulting in higher production rates and increased efficiency. Additionally, the reduced wear and tear on cutting tools leads to longer tool life, reducing tool replacement costs and overall manufacturing expenses. Furthermore, free-cutting steel round bars exhibit excellent chip control. During machining, the chips produced can affect the surface finish and dimensional accuracy of the final product. Free-cutting steel round bars are specifically formulated to produce small, manageable chips that are easily expelled from the cutting zone. This not only improves the quality of the machined parts but also minimizes the risk of chip clogging or chip-related issues. Another advantage of using free-cutting steel round bars is their superior surface finish. These bars are often produced with a fine grain structure and low levels of impurities, resulting in a smooth and visually appealing surface finish. This is especially important for applications where aesthetics and appearance play a significant role, such as in architectural designs or decorative purposes. Lastly, free-cutting steel round bars offer excellent mechanical properties. They are typically manufactured with controlled chemical compositions and heat treatments, ensuring consistent and reliable mechanical performance. This makes them suitable for demanding applications that require high strength, toughness, and durability. In conclusion, the advantages of using free-cutting steel round bars include excellent machinability, improved productivity, reduced manufacturing costs, superior chip control, enhanced surface finish, and reliable mechanical properties. These benefits make free-cutting steel round bars a preferred choice in various industries and applications.

Q:Can steel round bars be coated with protective coatings?: Indeed, it is possible to apply protective coatings to steel round bars. These coatings function as a shield, safeguarding the steel against corrosion, abrasion, and other forms of harm. The most prevalent form of protective coating for steel round bars is known as a corrosion-resistant coating. It is typically administered using methods such as hot-dip galvanization, electroplating, or powder coating. These coatings establish a protective layer that prevents the steel from encountering corrosive substances, moisture, and other environmental elements that may lead to deterioration. Furthermore, these coatings have the potential to enhance the aesthetic appeal of the steel round bars and extend their lifespan.

Q:What is the maximum load capacity of a steel round bar?: The maximum load capacity of a steel round bar depends on various factors, including the diameter, length, and grade of the steel. Steel round bars are designed to withstand different levels of stress and can have varying load capacities. Generally, the load capacity is determined by the yield strength and ultimate tensile strength of the steel. To determine the maximum load capacity of a specific steel round bar, it is necessary to consult engineering specifications or reference materials provided by the manufacturer. These specifications will provide the necessary information to calculate the load capacity based on the specific dimensions and properties of the round bar. It is important to note that load capacity calculations should be carried out by qualified professionals with a thorough understanding of structural engineering principles and material properties.

Q:Can steel round bars be used for making electrical components?: No, steel round bars are not typically used for making electrical components. Electrical components are typically made from materials that have good electrical conductivity, such as copper or aluminum.

Q:Are steel round bars susceptible to cracking?: Cracking in steel round bars can occur under certain circumstances. Factors that contribute to cracking include high stress levels, improper heat treatment, and the presence of impurities or defects in the material. Cracking is also more likely with sudden temperature changes or excessive loading. It is worth noting that the susceptibility to cracking varies depending on the grade and composition of the steel. Low carbon or mild steel is generally less prone to cracking compared to higher carbon or alloy steels. To prevent cracking, it is crucial to handle and store steel round bars properly. This includes avoiding dropping or mishandling the bars and storing them in a dry, controlled environment to prevent corrosion. Proper heat treatment processes, such as annealing or tempering, can improve the structural integrity of steel round bars and reduce the risk of cracking. Regular inspections and testing for defects or impurities can help identify and address issues before they lead to cracking. In conclusion, while steel round bars can be susceptible to cracking, taking appropriate precautions and using proper manufacturing and handling techniques can minimize the risk and ensure the bars' integrity.

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