steel round bar

Ref Price:

Loading Port:: China Main Port

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: -

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

You Might Also Like

stainless steel ; round bar steel ;steel rod

Stainless Steel Round Bar for Machine-made Industry,Chemical Industry, Shipping Industry

Carbon Structural Steel Round Bars Q235CR

Carbon Structural Steel Square Bars SAE1018CR

Carbon Structural Steel Square Bars ST37-2CR

Sea 9260 Spring Steel Bar

Carbon Steel Rod Bar AISI 1050

HSS Steel Round Bar/High Alloy Round Tool Steel Bar

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 is the difference between hot working and cold working of steel round bars?: Hot working and cold working are two different methods used to shape and manipulate steel round bars. Hot working involves heating the steel to a high temperature, typically above its recrystallization temperature, and then shaping it through processes such as forging, rolling, or extrusion. This method helps to reduce the hardness and increase the ductility of the steel, making it easier to reshape and form into desired shapes. Hot working also helps to refine the grain structure of the steel, improving its mechanical properties. On the other hand, cold working is performed at or near room temperature without the need for heating the steel. It involves processes like cold rolling, drawing, or bending, where the steel is mechanically deformed to achieve the desired shape. Cold working increases the strength and hardness of the steel while reducing its ductility. It also causes strain hardening, which results in a finer grain structure and improved dimensional accuracy. In summary, the main difference between hot working and cold working of steel round bars lies in the temperature at which the processes are carried out and the resulting effects on the mechanical properties of the steel. Hot working is performed at high temperatures to increase ductility and refine grain structure, while cold working is done at or near room temperature to enhance strength, hardness, and dimensional accuracy.

Q: Are steel round bars suitable for aerospace applications?: Indeed, aerospace applications can find steel round bars to be suitable. Steel is renowned for its exceptional strength, durability, and resistance against corrosion, making it highly valued in the aerospace sector. Various aerospace components and structures, including landing gear, engine components, and structural supports, can benefit from the utilization of steel round bars. Nevertheless, it is crucial to acknowledge that the precise grade and composition of the steel round bars must adhere to the exacting requirements and standards established by the aerospace industry. Moreover, weight reduction endeavors and the integration of advanced materials like titanium and composites are also taken into account when considering aerospace applications.

Q: Can steel round bars be used in the manufacturing of cylinders?: Yes, steel round bars can be used in the manufacturing of cylinders. Steel round bars are often used as raw material for manufacturing cylinders due to their high strength, durability, and ability to withstand high pressure and temperature conditions.

Q: Can steel round bars be used for making mining equipment?: Yes, steel round bars can be used for making mining equipment. Steel round bars are commonly used in the manufacturing of various mining equipment due to their high strength, durability, and resistance to wear and tear. They are suitable for applications that require heavy-duty and robust equipment, such as drilling rigs, excavators, crushers, and conveyor systems used in the mining industry. The versatility of steel round bars allows them to be machined, welded, and formed into different shapes and sizes, making them ideal for customizing mining equipment to meet specific requirements. Additionally, steel round bars can withstand harsh operating conditions in mining environments, including exposure to abrasive materials, extreme temperatures, and heavy loads.

Q: What is the maximum nickel content allowed for steel round bars?: The nickel content permitted for steel round bars can vary depending on the specific steel grade and application. Adding nickel to steel generally improves its mechanical properties, such as strength and toughness. However, excessively high nickel content can negatively affect the weldability and machinability of steel. As a result, industry standards and specifications often establish the maximum allowable nickel content for different grades of steel round bars. To determine the specific maximum nickel content allowed for a particular steel grade, it is essential to consult relevant standards and specifications, such as ASTM, AISI, or ISO. These standards offer comprehensive guidelines and restrictions to ensure the quality and suitability of steel round bars for a wide range of applications.

Q: What are the different types of steel round bar surface treatments used in the aerospace industry?: In the aerospace industry, the different types of steel round bar surface treatments commonly used include various coatings such as nickel plating, chrome plating, zinc plating, and anodizing. These treatments are applied to enhance the corrosion resistance, improve the durability, and provide a visually appealing finish to the steel round bars used in aerospace applications.

Q: What are the typical tolerances for steel round bars?: The specific requirements of the application or industry can cause variations in the typical tolerances for steel round bars. However, common standard tolerances are generally accepted. Regarding diameter, the tolerances for steel round bars typically fall within a few thousandths of an inch. This means that the actual diameter of the bar may slightly deviate from the specified diameter, but it will still be within an acceptable range. In terms of straightness, steel round bars are commonly manufactured with a tolerance for some deviation from a perfectly straight line. The usual tolerance for straightness is measured in units of inches per foot or millimeters per meter. This means that the bar may have a slight bend or curve, but it should not exceed the specified tolerance. Surface finish is another important factor for steel round bars. The tolerance for surface finish is usually specified in terms of roughness average (Ra) or surface roughness in micrometers. This tolerance ensures that the bar's surface is smooth and free from significant imperfections, such as pits or scratches. It is important to note that these typical tolerances can vary depending on the specific grade or type of steel used, as well as the intended application. Precision or critical applications may require tighter tolerances, while less demanding applications may accept looser tolerances. Therefore, it is recommended to consult relevant industry standards or specifications to determine the specific tolerances required for a particular steel round bar.

Q: What is the difference between a hot-finished and a cold-finished steel round bar?: The main difference between a hot-finished and a cold-finished steel round bar lies in the manufacturing process and the resulting physical properties of the steel. Hot-finished steel round bars are produced by passing the steel through a high-temperature furnace, followed by a series of rolling processes. This process helps to shape the steel into its desired final dimensions. The high temperatures during the manufacturing process allow for the steel to be more malleable, making it easier to shape and form. As a result, hot-finished steel round bars often have a rougher surface finish and may have slight imperfections such as scaling and decarburization. However, the high-temperature process imparts improved mechanical properties to the steel, such as higher tensile strength and yield strength, making it suitable for applications that require higher strength and durability. On the other hand, cold-finished steel round bars undergo a different manufacturing process. Cold-finished bars are formed by passing the steel through a series of cold rolling processes, which typically occur at room temperature. This process results in a smoother surface finish and tighter dimensional tolerances compared to hot-finished bars. The absence of high temperatures during the manufacturing process prevents scaling and decarburization, resulting in a more uniform and clean appearance. While cold-finished bars may have slightly lower tensile strength and yield strength compared to hot-finished bars, they offer improved dimensional accuracy and a smoother surface, making them suitable for applications that require precision machining or aesthetic appeal. In summary, the main differences between hot-finished and cold-finished steel round bars lie in the manufacturing process, surface finish, dimensional accuracy, and mechanical properties. Hot-finished bars offer higher strength and are suitable for applications that prioritize durability, while cold-finished bars provide better surface finish and dimensional accuracy, making them ideal for precision machining or applications where aesthetics are important.

Q: What are the advantages of using aluminum-silicon alloy steel round bars?: One of the advantages of using aluminum-silicon alloy steel round bars is their high strength-to-weight ratio. This makes them lightweight yet robust, making them suitable for a wide range of applications where both strength and weight are important factors. Additionally, the alloy's excellent corrosion resistance properties make it highly durable and long-lasting, reducing maintenance and replacement costs. Another advantage is its good thermal conductivity, making it useful in applications that require efficient heat transfer. Overall, aluminum-silicon alloy steel round bars offer a combination of strength, lightness, corrosion resistance, and thermal conductivity, making them a versatile and advantageous material choice.

Q: What are the different types of finishes available for steel round bars?: There are several types of finishes available for steel round bars, including hot rolled, cold drawn, turned and polished, and coated finishes. Each finish has its own unique characteristics and is suitable for specific applications.

Send your message to us

*Email

*TEL

*Quantity

*Unit