steel 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: How are steel round bars heat treated?: Steel round bars are typically heat treated through a process called quenching and tempering. First, the bars are heated to a specific temperature to transform the internal structure of the steel. Then, they are rapidly cooled by quenching in a liquid, such as oil or water, to harden the steel. Finally, tempering is performed by reheating the bars to a lower temperature to reduce brittleness and enhance toughness. This heat treatment process improves the strength, hardness, and overall performance of steel round bars.

Q: Can steel round bars be used in the production of HVAC equipment?: Yes, steel round bars can be used in the production of HVAC equipment. Steel round bars are often used to create the structural framework and components of HVAC systems. They provide strength, durability, and stability necessary for various parts such as supports, brackets, and frames. Additionally, steel round bars can be easily fabricated, welded, and shaped to meet the specific requirements of HVAC equipment.

Q: Can steel round bars be used for making pressure vessels?: Typically, steel round bars are not employed in the production of pressure vessels due to their lack of specific properties, including high strength, good weldability, and resistance to corrosion. Although steel round bars offer strength, they may not meet all the essential criteria. Instead, pressure vessels are manufactured using specialized materials like carbon steel plates or stainless steel sheets, which satisfy the necessary standards and certifications. These materials are specifically selected for their capacity to endure the high pressures and temperatures experienced by pressure vessels.

Q: What are the advantages of using nickel-chromium-manganese alloy steel round bars?: There are several advantages of using nickel-chromium-manganese alloy steel round bars in various applications. Firstly, this type of alloy steel offers excellent strength and durability. The combination of nickel, chromium, and manganese enhances the overall strength of the steel, making it resistant to wear, impact, and deformation. This is particularly beneficial in industries such as construction, manufacturing, and automotive, where the round bars are commonly used for structural support and load-bearing purposes. Secondly, nickel-chromium-manganese alloy steel round bars exhibit excellent corrosion resistance. The presence of nickel and chromium in the alloy composition makes it highly resistant to rust and oxidation, even in harsh environments or exposure to corrosive substances. This property is crucial in applications where the round bars are exposed to moisture, chemicals, or high temperatures, such as marine environments or chemical processing plants. Additionally, this type of alloy steel offers good weldability and machinability. The combination of nickel, chromium, and manganese provides a balanced composition that allows for easy welding and machining operations. This makes it convenient for fabricators and manufacturers to work with the round bars, enabling them to create complex shapes or structures without compromising the material's integrity. Moreover, nickel-chromium-manganese alloy steel round bars have excellent heat resistance. The presence of nickel and chromium in the alloy composition enhances its ability to withstand high temperatures without losing its strength or shape. This property makes it suitable for applications that involve exposure to extreme heat, such as furnace components, heat exchangers, or high-temperature industrial processes. Lastly, the use of nickel-chromium-manganese alloy steel round bars often leads to cost savings in the long run. Due to their exceptional strength and durability, these round bars have a longer lifespan compared to other materials. This reduces the need for frequent replacements, resulting in lower maintenance costs and improved overall efficiency. In conclusion, the advantages of using nickel-chromium-manganese alloy steel round bars include excellent strength and durability, corrosion resistance, weldability, machinability, heat resistance, and long-term cost savings. These properties make them a preferred choice in various industries where high-performance materials are required.

Q: What are the advantages of using steel round bars in construction?: Using steel round bars in construction offers several advantages: Firstly, steel round bars are known for their exceptional strength and durability. They possess a high tensile strength, allowing them to bear heavy loads and provide robust support. This makes them ideal for construction projects that require structural integrity and stability. Secondly, steel round bars provide versatility in construction. They come in various sizes and grades, allowing for easy shaping, bending, and welding to fit specific design requirements. This adaptability makes them suitable for a wide range of applications, such as building frameworks, reinforcing concrete structures, or even adding decorative elements. Thirdly, steel round bars offer cost-effectiveness in construction. They have a long lifespan and require minimal maintenance due to their resistance to corrosion, weathering, and pests. Moreover, their strength allows for the use of lighter construction materials, potentially reducing overall project costs. Additionally, steel round bars have excellent fire-resistant properties, making them a safe choice for construction. They do not burn, melt, or emit toxic fumes under high temperatures, which is essential in preventing the spread of fire and ensuring occupant safety. Furthermore, using steel round bars in construction contributes to sustainability. Steel is 100% recyclable and using recycled steel helps minimize waste and conserve natural resources. The recycling process also requires less energy compared to manufacturing steel from raw materials, making it an eco-friendly choice. Moreover, steel round bars are readily available in the market, making them easily accessible for construction projects. Additionally, their production undergoes strict quality control measures, guaranteeing consistent and reliable material properties. This ensures the structural integrity and safety of the constructed buildings or infrastructures. In conclusion, the advantages of using steel round bars in construction include their strength, versatility, cost-effectiveness, fire resistance, sustainability, availability, and quality control. These attributes make them a popular choice for builders and engineers seeking reliable and efficient materials for their construction projects.

Q: What are the different surface treatments available for steel round bars?: Steel round bars can undergo a variety of surface treatments to enhance their properties and improve performance. Some common options include: 1. Hot-dip galvanizing: Immersing the bars in molten zinc forms a protective coating, offering excellent corrosion resistance suitable for outdoor or moist environments. 2. Electroplating: Applying a thin metal layer using an electric current can enhance corrosion resistance, appearance, or provide specific functional properties. 3. Powder coating: Heat-curing a dry powder paint creates a durable and decorative coating, offering corrosion resistance and a wide range of color options. 4. Black oxide coating: A chemical treatment creates a dark, matte finish, providing moderate corrosion resistance and enhancing appearance for decorative or non-reflective applications. 5. Chrome plating: Electroplating a thin chromium layer enhances corrosion and wear resistance, while also giving a shiny, reflective finish. 6. Nitriding: Heat treating the bars diffuses nitrogen into the surface, forming a hardened layer that improves hardness, wear resistance, and fatigue strength for high-strength and durable applications. 7. Anodizing: Although commonly used for aluminum, anodizing can also be applied to steel round bars. This electrolytic process creates a protective oxide layer, enhancing corrosion resistance and providing a durable and decorative finish. These examples represent only a fraction of the available surface treatments for steel round bars. The choice of treatment depends on the specific requirements of the application, such as corrosion resistance, wear resistance, appearance, or functional properties needed.

Q: Can steel round bars be welded?: Yes, steel round bars can be welded. Welding is a common method used to join steel round bars together. The process involves heating the steel bars to a high temperature and applying pressure to fuse them together. This allows for the creation of strong and durable connections between the steel round bars. However, it is important to ensure that the appropriate welding techniques and equipment are used to achieve a high-quality weld.

Q: Is round steel round steel?: Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of which: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. Round bars larger than 25 millimeters are used mainly for making mechanical parts or for seamless steel tubes.

Q: What are the different types of steel round bars used in the manufacturing of cutting tools?: There are several different types of steel round bars that are commonly used in the manufacturing of cutting tools. Some of the most commonly used types include: 1. High-Speed Steel (HSS): This type of steel is known for its excellent hardness, wear resistance, and ability to retain its cutting edge at high temperatures. HSS round bars are often used in the manufacturing of drills, end mills, and other cutting tools that are used for metalworking and high-speed applications. 2. Tool Steel: Tool steel round bars are widely used in the production of cutting tools due to their high strength, toughness, and resistance to wear and deformation. Different grades of tool steel, such as D2, A2, and O1, are chosen based on the specific application and requirements of the cutting tool. 3. Carbon Steel: Carbon steel round bars are commonly used in the manufacturing of cutting tools that are designed for softer materials, such as wood and plastics. Carbon steel offers good hardness and durability, making it suitable for a wide range of cutting applications. 4. Stainless Steel: Stainless steel round bars are often used in the manufacturing of cutting tools that require high corrosion resistance and strength. Stainless steel offers good durability, toughness, and edge retention, making it a popular choice for cutting tools used in the food industry, medical field, and other applications where cleanliness and hygiene are important. 5. Alloy Steel: Alloy steel round bars are made by adding various alloying elements, such as chromium, molybdenum, and vanadium, to improve the properties of the steel. Alloy steel offers enhanced hardness, strength, and wear resistance, making it suitable for cutting tools used in demanding applications, such as machining hardened materials and high-temperature cutting. It is important to choose the appropriate type of steel round bar based on the specific requirements of the cutting tool, including the material being cut, the desired cutting speed, and the expected operating conditions.

Q: What are the limitations of using steel round bars?: Using steel round bars in various applications has several limitations. One such limitation is their vulnerability to corrosion. Steel round bars, particularly those made of carbon steel, are prone to rusting when exposed to moisture or harsh environments. This can have a significant impact on their structural integrity and lifespan. Another limitation is their weight. Steel is a heavy material, and round bars can be especially cumbersome to handle and transport, especially in large quantities. This can make the installation process more difficult and increase the overall project cost. In addition, steel round bars may not be suitable for applications that require high levels of flexibility or bending. Their rigid nature makes it challenging to shape or mold them into intricate designs. This limitation can restrict their use in certain industries or architectural designs that demand more versatile materials. Another factor to consider is the cost of steel round bars. Depending on the grade, quality, and market conditions, the price of steel round bars can fluctuate significantly. This can be a financial limitation for projects with tight budgets or when the cost of raw materials is a crucial factor. Lastly, steel round bars may not be suitable for applications that require high resistance to extreme temperatures. While steel has good thermal conductivity, certain temperature ranges can affect its structural properties, potentially causing weaknesses or deformations. Overall, steel round bars have widespread use and offer many advantages. However, it is essential to consider their limitations such as susceptibility to corrosion, weight, limited flexibility, cost, and temperature sensitivity when selecting materials for specific applications.

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