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: What are the different types of steel round bar surface coatings?: Enhancing the performance and durability of steel round bars commonly involves utilizing various surface coatings. These coatings serve as a protective layer, safeguarding against corrosion and improving the overall appearance. Several types of surface coatings are frequently employed, including: 1. Galvanized Coating: This method entails applying a zinc layer to the steel round bar. It boasts exceptional corrosion resistance, making it ideal for outdoor applications that expose the steel to moisture and harsh environmental conditions. 2. Powder Coating: In this process, a dry powder is applied to the steel round bar and then cured under heat. The result is a robust and visually appealing finish that resists chipping, scratching, and fading. Powder coating offers a wide range of colors and textures, making it a popular choice for decorative purposes. 3. Epoxy Coating: An application of liquid thermosetting polymer, which subsequently cures to form a protective layer, characterizes epoxy coating. This type of coating exhibits excellent resistance to corrosion and chemicals, making it suitable for use in harsh environments. Industries such as oil and gas, marine, and chemical processing frequently employ epoxy coatings. 4. Chrome Plating: Chrome plating involves electroplating a chromium layer onto the steel round bar. This coating provides superior corrosion resistance and enhances the steel's appearance. Chrome plating is commonly utilized in applications where both corrosion protection and aesthetics are crucial, such as automotive parts and decorative hardware. 5. Nickel Plating: Similar to chrome plating, nickel plating involves electroplating a nickel layer onto the steel round bar. This coating offers exceptional corrosion resistance and is often utilized in applications where the steel is exposed to harsh chemicals or extreme temperatures. These examples only scratch the surface of the available options for steel round bar surface coatings. The choice of coating depends on the specific requirements of the application, including the desired level of corrosion resistance, chemical resistance, and aesthetic appeal. Selecting the appropriate coating based on the intended use of the steel round bar ensures optimal performance and longevity.

Q: Can steel round bars be coated for added protection?: Steel round bars can indeed be coated to provide additional protection. Coating these bars is effective in boosting their resistance to corrosion, wear and tear, as well as other environmental factors that may cause deterioration or damage. There are multiple coating options available for steel round bars, including hot-dip galvanizing, epoxy coating, powder coating, and zinc plating. These coatings create a protective layer that acts as a barrier between the steel and its surroundings, thus preventing direct contact with corrosive substances or abrasive elements. By coating steel round bars, not only does their lifespan and durability increase, but their aesthetic appearance also improves. The choice of coating depends on the specific application, environment, and desired level of protection.

Q: Are steel round bars prone to deformation?: Steel round bars are generally not prone to deformation when they are properly manufactured and used within their intended limits. Steel is known for its high tensile strength and durability, making it resistant to bending or warping under normal circumstances. However, it is important to note that excessive force or improper handling can still cause deformation in steel round bars. Overloading, incorrect storage conditions, or inappropriate machining techniques can all contribute to bending or twisting of the bars. Therefore, it is crucial to follow recommended guidelines and industry standards to ensure the integrity and longevity of steel round bars.

Q: How do you calculate the deflection of a steel round bar?: To calculate the deflection of a steel round bar, you need to consider various factors such as the bar's length, diameter, and the applied load. The deflection of a bar refers to the amount it bends or flexes under a specific load. The deflection can be determined using the formula for beam deflection, which is derived from Euler-Bernoulli beam theory. The formula is as follows: δ = (F * L^3) / (48 * E * I) Where: - δ represents deflection - F is the applied load - L is the length of the bar - E is the modulus of elasticity of the steel material - I is the moment of inertia of the round bar To calculate the moment of inertia (I) for a round bar, you can use the formula: I = (π * D^4) / 64 Where: - I is the moment of inertia - D is the diameter of the round bar By substituting the values into the formula, you can calculate the deflection of the steel round bar under the given load. It is important to note that these calculations assume the bar is perfectly elastic and obeys the principles of linear elasticity.

Q: What is the maximum nickel content allowed for steel round bars?: The maximum nickel content allowed for steel round bars typically varies depending on the specific grade and industry standards. However, in general, the nickel content in steel round bars is usually limited to around 2-3% to maintain desirable mechanical properties and prevent excessive hardening.

Q: What's the difference between round steel and other steel bars?: Different appearance, round steel appearance garden, no grain without rib, other steel surface has carved or ribbed. This causes the round bar and concrete bonding force is small, and other steel and concrete bonding force

Q: Can steel round bars be used in the manufacturing of agricultural equipment?: Yes, steel round bars can be used in the manufacturing of agricultural equipment. Steel is a strong and durable material that provides the necessary strength and structural integrity required for agricultural machinery. It is commonly used in the production of components such as axles, shafts, and supports, making it suitable for various types of farming equipment.

Q: Are steel round bars susceptible to corrosion?: Corrosion is a common issue for steel round bars, especially when they come into contact with moisture, oxygen, and certain chemicals. The degradation of the material occurs when the metal reacts with its surroundings. Steel, primarily composed of iron, can undergo different types of corrosion, including general corrosion, pitting corrosion, and stress corrosion cracking. When steel round bars are exposed to moisture and oxygen, they can experience general corrosion. This gradual deterioration manifests as the formation of an oxide layer on the surface, resulting in material loss and reduced strength over time. Pitting corrosion is another type that steel round bars may encounter. It involves localized damage on the metal's surface, leading to the creation of small pits. These pits can deepen and expand, compromising the structure and integrity of the bars. Stress corrosion cracking is a specific form of corrosion that affects steel round bars under tensile stress, in the presence of particular corrosive agents. This phenomenon can cause sudden material failure, even when stress levels are below the bars' yield strength. To combat corrosion, protective coatings and corrosion inhibitors are commonly applied to steel round bars. Methods like galvanization, where a layer of zinc is added, or the use of epoxy or paint coatings are often employed. Regular maintenance and proper storage practices are also important in preventing excessive exposure to corrosive elements. It is worth noting that the susceptibility to corrosion can vary depending on the grade and composition of the steel used for the round bars. Certain types of stainless steel, for instance, exhibit higher resistance to corrosion due to the presence of chromium and other alloying elements. In conclusion, while steel round bars can be vulnerable to corrosion, appropriate preventive measures can be implemented to minimize the risk and prolong their lifespan.

Q: How are steel round bars made?: Steel round bars are made through a process called hot rolling. It involves heating a large rectangular steel billet until it reaches a malleable temperature. The heated billet is then passed through a series of rolling stands, which progressively reduce its thickness and shape it into a round bar. The first step in the hot rolling process is heating the billet in a furnace at extremely high temperatures, typically around 1200 to 1300 degrees Celsius. This heat makes the steel more pliable and easier to shape. Once the billet is heated, it is fed into a rolling mill. The mill consists of a series of rollers that gradually reduce the thickness and elongate the billet. As the billet passes through each set of rollers, it is squeezed and stretched, gradually forming a round shape. The number of passes through the rolling mill depends on the desired final size and shape of the round bar. During the rolling process, the steel bar is also cooled to prevent overheating and ensure proper metallurgical properties. This can be done through a water spray or air cooling system. After the bar has been shaped and cooled, it is cut into desired lengths. The cut bars are then subjected to further processes such as straightening, surface treatment, and quality testing. These additional steps ensure that the steel round bars meet the required specifications and standards. Overall, the process of making steel round bars involves heating a steel billet, passing it through a series of rolling stands to shape it into a round bar, cooling it, and then cutting it into desired lengths. This process allows for the production of strong and durable round bars that find various applications in industries such as construction, manufacturing, and engineering.

Q: Can steel round bars be used in the production of machinery?: Yes, steel round bars can be used in the production of machinery. Steel round bars are commonly used in the manufacturing industry for various applications, including the production of machinery. The high strength and durability of steel make it an ideal material for constructing machine components that require strength and rigidity. Steel round bars can be machined, shaped, and welded to create different parts such as shafts, gears, axles, and structural components in machinery. The use of steel round bars ensures the reliability and longevity of the machinery, making it a preferred choice in many industries.

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