High Quality Round Bar Q195 Q235 Hot Rolled 5-28mm

High Quality Round Bar Q195 Q235 Hot Rolled 5-28mm System 1

High Quality Round Bar Q195 Q235 Hot Rolled 5-28mm

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Product Description:

OKorder is offering High Quality Round Bar Q195 Q235 Hot Rolled 5-28mmat great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to European, North American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.

Product Applications:

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.

Product Advantages:

OKorder's High Quality Round Bar Q195 Q235 Hot Rolled 5-28mm are durable, strong, and resist corrosion.

Main Product Features:

· Premium quality

· Prompt delivery & seaworthy packing (30 days after receiving deposit)

· Corrosion resistance

· Can be recycled and reused

· Mill test certification

· Professional Service

· Competitive pricing

Product Specifications:

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

FAQ:

Q1: Why buy Materials & Equipment from OKorder.com?

A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.

Q2: How do we guarantee the quality of our products?

A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.

Q3: How soon can we receive the product after purchase?

A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.

High Quality Round Bar Q195 Q235 Hot Rolled 5-28mm

Q: How do you determine the hardness of a steel round bar?: To determine the hardness of a steel round bar, various methods can be used. One common method is the Rockwell hardness test. This test involves applying a minor load to the surface of the bar using a diamond or a hardened steel ball, followed by a major load. The depth of penetration of the minor and major loads is measured, and a hardness value is determined based on the difference between the two depths. Another method is the Brinell hardness test, which involves indenting the surface of the steel bar using a hardened steel ball under a specified load. The diameter of the resulting indentation is measured, and the hardness value is calculated based on the load and the diameter of the indentation. Alternatively, the Vickers hardness test can also be used. This test involves applying a diamond pyramid-shaped indenter to the surface of the steel bar under a specific load. The size of the indentation is measured, and the hardness value is determined based on the load and the surface area of the indentation. It is important to note that the specific method used to determine the hardness of a steel round bar depends on factors such as the type of steel and the desired accuracy of the measurement. Additionally, other factors such as heat treatment and composition can also affect the hardness of the steel bar, so it is essential to consider these factors when determining hardness.

Q: What are the advantages of using tool steel round bars?: Tool steel round bars offer several advantages: 1. High hardness: Tool steel round bars have exceptional hardness, making them ideal for applications that require resistance to wear, abrasion, and deformation. This property ensures longevity and durability of the tool. 2. Excellent machinability: Tool steel round bars are known for their excellent machinability, meaning they can be easily shaped, cut, and formed into various tool designs. This enhances the versatility and precision of the tool. 3. Superior strength and toughness: Tool steel round bars possess exceptional strength and toughness, enabling them to withstand high impact and shock loading. This makes them suitable for heavy-duty applications where tools are subjected to intense pressure and stress. 4. Good heat resistance: Tool steel round bars exhibit excellent heat resistance, allowing them to retain their hardness and strength even at high temperatures. This characteristic is crucial for tools used in applications involving heat treatment, forging, and molding. 5. Corrosion resistance: Many tool steel alloys contain elements such as chromium, vanadium, and molybdenum, which enhance their corrosion resistance. This makes tool steel round bars suitable for applications in corrosive environments, ensuring longevity and performance. 6. Precise dimensional accuracy: Tool steel round bars are manufactured to precise dimensional tolerances, ensuring uniformity and consistency in their shape and size. This level of accuracy is crucial for ensuring the proper fit and functionality of the tool. Overall, the advantages of using tool steel round bars lie in their hardness, machinability, strength, heat resistance, corrosion resistance, and dimensional accuracy, making them a preferred choice for various tooling applications.

Q: How do steel round bars perform under bending or flexing forces?: Steel round bars are highly resistant to bending or flexing forces due to their strong and rigid nature. They can withstand significant loads without deforming or breaking, making them ideal for applications that require structural integrity and durability.

Q: How do you identify the grade of a steel round bar?: There are several ways to determine the grade of a steel round bar. First, examining the markings or labels on the bar itself can provide valuable information. Manufacturers often imprint or etch the grade directly onto the bar's surface. These markings usually include details like the grade designation (e.g., 304, 316, 4140), which represents the specific alloy composition, and may also include additional information such as the heat or lot number. Another method involves consulting the mill test certificate (MTC) that comes with the steel round bar. The MTC provides extensive information about the composition, mechanical properties, and other relevant specifications of the material. Typically, the steel mill or supplier issues the MTC, and it can be requested at the time of purchase. Additionally, the grade of a steel round bar can be determined through visual inspection and physical testing. Visual inspection entails examining the bar's appearance, texture, and color. Different grades of steel exhibit distinct characteristics, such as a glossy or matte finish, specific surface treatments, or variations in color due to varying alloying elements. Physical testing methods, such as tensile or hardness testing, can further confirm the steel grade. These tests measure the material's mechanical properties, including its strength, ductility, and hardness. By comparing the test results with established standards and specifications for different steel grades, it is possible to identify the grade of the round bar. In conclusion, to ascertain the grade of a steel round bar, one can inspect the markings, refer to the mill test certificate, visually assess the bar, and conduct physical tests to evaluate its mechanical properties.

Q: Can steel round bars be used in the manufacturing of appliances?: Yes, steel round bars can be used in the manufacturing of appliances. Steel is a durable and versatile material that can be shaped into different forms, including round bars, which can be used for various purposes in appliance manufacturing such as structural support, handles, or components.

Q: Can steel round bars be used for making furniture?: Certainly! Furniture can indeed be made using steel round bars. These bars possess qualities of strength, durability, and a sleek, contemporary appearance. With these features in mind, a wide variety of furniture items can be crafted, including tables, chairs, stools, and shelving units. By welding, bending, and shaping steel round bars, bespoke and distinctive designs can be achieved. Furthermore, combining steel round bars with other materials, such as wood or glass, allows for a captivating blend of textures and styles. An added advantage of steel round bars is their resistance to corrosion, rendering them suitable for both indoor and outdoor furniture. In summary, steel round bars bestow versatility and robustness, making them an exceptional choice for furniture-making endeavors.

Q: What are the different heat treatment methods for steel round bars?: Steel round bars can undergo various heat treatment methods to enhance their mechanical properties and overall performance. These methods, namely annealing, normalizing, quenching, tempering, and case hardening, are commonly employed. 1. Annealing: By subjecting the steel round bars to a specific temperature and maintaining it for a certain duration, annealing achieves a uniform microstructure. This treatment alleviates internal stresses, improves ductility, and enhances machinability. 2. Normalizing: This technique involves heating the steel round bars slightly above their critical transformation temperature and subsequently cooling them in still air. Normalizing refines the grain structure, enhances mechanical properties, and improves resistance to impact and fatigue. 3. Quenching: The process of quenching entails heating the steel round bars above their critical temperature and rapidly cooling them by immersion in a quenching medium like oil, water, or brine. This rapid cooling hardens the steel, rendering it stronger and more resistant to wear and abrasion. However, quenched steel may exhibit brittleness, necessitating additional heat treatment steps. 4. Tempering: Following the quenching process, tempering is often employed to reduce brittleness and enhance toughness. Tempering involves reheating the quenched steel to a specific temperature and holding it there for a designated time, followed by gradual cooling. This procedure alleviates internal stresses, improves ductility, and enhances overall toughness and machinability. 5. Case Hardening: Case hardening is a surface heat treatment method that increases the hardness of the outer layer of steel round bars while maintaining a relatively softer core. This technique involves heating the steel in a carbon-rich environment, such as a gas or salt bath, and subsequently quenching it to achieve a hardened outer layer. Case hardening improves wear resistance and fatigue strength, making it suitable for applications requiring high surface hardness. It is crucial to note that the selection of the specific heat treatment method for steel round bars depends on the desired mechanical properties and intended application. Manufacturers meticulously choose the appropriate heat treatment method based on factors such as steel composition, desired hardness, and required strength.

Q: How do steel round bars compare to plastic round bars?: Steel round bars and plastic round bars have several key differences that affect their performance and suitability for different applications. Strength and durability: Steel round bars are known for their exceptional strength and durability, making them ideal for applications requiring high load-bearing capacity. They can withstand heavy loads and resist deformation or breakage. On the other hand, plastic round bars are generally less strong and durable, making them more suitable for lighter applications where strength is not a primary concern. Weight: Steel round bars are significantly heavier than plastic round bars due to the difference in material density. This can be an advantage in some applications where additional weight is desired for stability or balance. Plastic round bars, on the other hand, are lighter and can be advantageous in applications where weight reduction is important, such as in aerospace or automotive industries. Corrosion resistance: Steel round bars are known for their excellent corrosion resistance, particularly when they are made from stainless steel. This makes them suitable for applications in harsh environments or exposed to moisture. Plastic round bars, however, are generally more susceptible to degradation due to exposure to UV radiation, chemicals, or extreme temperatures. Therefore, they may not be as suitable for outdoor or corrosive environments. Versatility: Steel round bars offer a wide range of options in terms of size, shape, and grade. They can be machined, welded, bent, or shaped to suit various applications. Plastic round bars also come in different shapes and sizes, but their versatility is somewhat limited compared to steel. They may not be as easily machined or welded, and their performance can be affected by temperature fluctuations. Cost: Steel round bars are generally more expensive than plastic round bars due to the higher cost of raw materials and manufacturing processes. Plastic round bars, on the other hand, are more affordable and can offer cost savings in certain applications. In summary, steel round bars offer superior strength, durability, and corrosion resistance, making them suitable for heavy-duty applications. Plastic round bars are lighter, more affordable, and can be advantageous in applications where weight reduction is important. Ultimately, the choice between steel and plastic round bars depends on the specific requirements of the application and the trade-offs between strength, weight, cost, and corrosion resistance.

Q: Are steel round bars suitable for use in the manufacturing of valves?: Yes, steel round bars are suitable for use in the manufacturing of valves. Steel round bars offer excellent strength, durability, and corrosion resistance, making them ideal for various applications including valve production. Additionally, steel round bars can be easily machined and fabricated into different shapes and sizes, allowing for customization according to specific valve requirements.

Q: Are steel round bars suitable for the production of bearings?: No, steel round bars are not suitable for the production of bearings. Bearings require specific materials with high hardness, wear resistance, and low friction characteristics, such as bearing steels or ceramics. Steel round bars do not possess these necessary properties, making them unsuitable for bearing production.

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