Hot Rolled Steel Round Bar 40Cr System 1

Hot Rolled Steel Round Bar 40Cr

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 100 m.t.

Supply Capability:: 2000 m.t./month

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Product Applications:

Hot Rolled Steel Round Bar are ideal for a large number of architectural and engineering structures. Or it can be used in construction of plants for the production of steel house frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc

Product Advantages:

OKorder's Hot Rolled Steel Round Bars are durable, strong, and with competitive price

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:

Manufacture: Hot rolled

Grade: Q195 – 235

Certificates: ISO, SGS, BV, CIQ

Length: 6m – 12m, as per customer request

Packaging: Export packing, nude packing, bundled

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

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.

Q4:What is the package

A4: Standard seaworthy packing or as customer required; all goods are packed in bundle with steel strips and shipped by break bulk vessel or container

Images:

Hot Rolled Steel Round Bar 40Cr

Q:How are steel round bars made?: Hot rolling is the method used to produce steel round bars. It starts by heating a large rectangular steel billet until it becomes malleable. Then, the heated billet is fed through a series of rolling stands that gradually decrease its thickness and give it a round shape. To begin the hot rolling process, the billet is placed in a furnace and subjected to extremely high temperatures, typically ranging from 1200 to 1300 degrees Celsius. This high heat makes the steel more pliable and easier to manipulate. Once the billet is heated, it is introduced into a rolling mill. This mill consists of rollers that progressively reduce the thickness and elongate the billet. Each set of rollers squeezes and stretches the billet, gradually forming it into a round shape. The number of passes through the rolling mill depends on the desired final size and shape of the round bar. While the rolling process takes place, the steel bar is also cooled to prevent overheating and ensure proper metallurgical properties. This cooling can be achieved through the use of a water spray or air cooling system. After the bar has been shaped and cooled, it is cut into the desired lengths. The cut bars then undergo further processes, including straightening, surface treatment, and quality testing. These additional steps guarantee that the steel round bars meet the required specifications and standards. In conclusion, the production of 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 cutting it into the desired lengths. This process enables the creation of robust and long-lasting round bars that serve various applications in industries like construction, manufacturing, and engineering.

Q:What are the corrosion resistance properties of steel round bars?: Due to the presence of alloying elements like chromium, nickel, and molybdenum, steel round bars possess exceptional corrosion resistance. These elements combine to form a protective oxide layer on the steel's surface, effectively preventing contact with corrosive substances. By reacting with oxygen in the air, chromium in steel round bars forms a thin, unnoticeable layer of chromium oxide. This layer plays the role of a barrier, shielding the steel from further oxidation and corrosion. Additionally, nickel and molybdenum enhance the corrosion resistance of steel by increasing its ability to withstand pitting, crevice corrosion, and chloride-induced stress corrosion cracking. Apart from alloying elements, the manufacturing process can also impact the corrosion resistance of steel round bars. For example, stainless steel round bars are frequently subjected to passivation, a process that eliminates free iron and other contaminants from the surface. Passivation contributes to the steel's corrosion resistance by creating a clean and inert surface that is less susceptible to corrosion. In conclusion, steel round bars are renowned for their remarkable corrosion resistance, which makes them well-suited for a wide array of applications across various industries, including construction, marine, automotive, and aerospace.

Q:Can steel round bars be used in the manufacturing of home decor?: Yes, steel round bars can be used in the manufacturing of home decor. They are versatile and can be shaped and welded into various forms, making them suitable for creating furniture, sculptures, and other decorative elements for homes.

Q:What is the difference between a bright and a black steel round bar?: The main difference between a bright and a black steel round bar lies in their appearance and surface finish. A bright steel round bar, also known as a bright drawn or turned bar, has a smooth and shiny surface. This is achieved through a process called cold drawing, where the steel bar is pulled through a die to remove any imperfections and create a uniform shape. The result is a highly polished and reflective surface that is visually appealing. On the other hand, a black steel round bar has a dark, rough, and non-reflective surface. This is because it does not undergo the same cold drawing process as a bright steel bar. The black surface is typically a result of the scale that forms on the steel during the manufacturing process, which is not removed. In terms of properties, both bright and black steel round bars are made of the same material, typically carbon steel. Therefore, their mechanical properties such as strength, hardness, and toughness are generally similar. However, the manufacturing process of the bright steel bar helps to improve its surface quality and dimensional accuracy compared to the black steel bar. Ultimately, the choice between a bright and a black steel round bar depends on the desired aesthetic appearance and the specific application requirements. Bright steel bars are commonly used in decorative applications, where a polished and visually appealing finish is desired. Black steel bars, on the other hand, are often used in structural applications, where the surface appearance is less important but strength and durability are crucial.

Q:What are the different types of steel round bar alloys used in the automotive industry?: Different types of steel round bar alloys are utilized in the automotive industry for their distinct properties and applications. 1. Carbon Steel: Carbon steel round bars are extensively employed due to their favorable attributes of strength and toughness. They find use in various automotive components like axles, crankshafts, and gears. 2. Alloy Steel: Alloy steel round bars comprise additional alloying elements such as chromium, nickel, or molybdenum. These alloys enhance the mechanical properties of the steel, rendering it stronger and more durable. Automotive applications like suspension components, drive shafts, and steering components commonly employ alloy steel round bars. 3. Stainless Steel: Automotive applications that demand durability in harsh environments benefit from the highly corrosion-resistant nature of stainless steel round bars. Exhaust systems, fuel tanks, and body parts are frequently made using stainless steel. 4. Tool Steel: Tool steel round bars exhibit high hardness, wear resistance, and toughness. They are predominantly used in the production of automotive tools and dies, like punches, dies, and cutting tools. 5. Bearing Steel: Bearing steel round bars are specifically designed to offer excellent wear resistance and high load-carrying capacity in automotive bearings. These bars possess a high level of hardness and undergo heat treatment to ensure optimal performance. 6. Spring Steel: Automotive suspension systems and other applications that necessitate exceptional elasticity and fatigue resistance utilize spring steel round bars. These bars are capable of enduring repeated stress while maintaining their shape, making them ideal for automotive springs and stabilizer bars. It is crucial to consider the desired properties, performance requirements, and cost considerations of each automotive component when selecting a specific steel alloy.

Q:What are the factors to consider when selecting a steel round bar?: When selecting a steel round bar, there are several factors that should be taken into consideration. Firstly, it is important to consider the grade of steel. Different grades of steel have varying properties and strengths, so the specific application and requirements should be evaluated. For example, if high corrosion resistance is needed, stainless steel grades like 304 or 316 may be suitable, whereas for structural applications, carbon steel grades like A36 or 1018 may be more appropriate. Secondly, the dimensions and size of the round bar should be considered. This includes the diameter, length, and tolerance requirements. The size should be chosen based on the specific application, load-bearing capacity, and the available space for installation. Thirdly, the surface finish and condition of the round bar should be assessed. This includes factors such as surface roughness, straightness, and any surface defects. The surface finish should be selected based on the desired aesthetics, functional requirements, and the manufacturing process. Another important factor is the availability and cost of the steel round bar. It is crucial to consider the availability of the desired grade and size from suppliers, as well as the associated cost. It is advisable to compare prices from different suppliers to ensure the best value for money. Furthermore, the required mechanical properties of the steel round bar should be evaluated. This includes factors such as tensile strength, yield strength, hardness, and ductility. The mechanical properties should align with the intended application and load-bearing requirements. Lastly, it is essential to consider any additional requirements or certifications that may be needed. This could include compliance with specific industry standards (e.g., ASTM, ISO), certifications (e.g., RoHS, REACH), or specific testing requirements (e.g., ultrasonic testing, impact testing). In conclusion, when selecting a steel round bar, it is important to consider the grade, dimensions, surface finish, availability, cost, mechanical properties, and any additional requirements. Taking into account these factors will help ensure that the steel round bar chosen is suitable for the intended application and meets all necessary specifications.

Q:Can steel round bars be used for making decorative items?: Certainly, decorative items can indeed be created using steel round bars. With their ability to be shaped, bent, and welded, steel round bars offer a wide range of options for designing various decorative patterns. They possess durability and strength, making them suitable for both indoor and outdoor uses. Decorative furniture, sculptures, railings, gates, light fixtures, and many other items can be crafted from steel round bars. Their sleek and contemporary appearance adds an industrial and modern touch to any space. Furthermore, steel round bars can be finished with different coatings or treatments, such as powder coating or patina, to enhance their visual appeal and protect against corrosion. Consequently, steel round bars are an exceptional choice for creating decorative items because of their versatility, strength, and ability to infuse a stylish and distinctive element into any design.

Q:Why is the round bar bent?: In fact, the stress and deformation complex around reinforced concrete, bond stress varies with grip length of the rebar so bond strength with steel type, shape and position of the embedded in concrete, different direction and change, is also related to concrete strength, concrete compressive strength the higher the strength, the bond strength is generally determined by R=P/3.14dL. P for pullout force, D, rebar diameter, L, steel embedment length.

Q:Can steel round bars be used for making pipelines?: Pipelines can indeed be constructed using steel round bars. Steel is commonly utilized in pipeline construction because of its robustness, longevity, and ability to resist corrosion. Cylindrical in shape, round bars are easily manufactured and can be joined together through welding to create pipelines of different sizes and lengths. The steel round bars employed for pipelines typically consist of carbon or alloy steel, both of which possess substantial tensile strength and can endure high pressure and temperature conditions. Moreover, protective coatings like epoxy or polyethylene can be applied to steel round bars to heighten their resistance to corrosion. As a whole, steel round bars offer a dependable and efficient choice for building pipelines across various industries, including oil and gas, water supply, and construction.

Q:Can steel round bars be used for making stabilizer bars?: Yes, steel round bars can be used for making stabilizer bars. Steel is a commonly used material in the automotive industry due to its high strength, durability, and resistance to deformation. Stabilizer bars, also known as sway bars, are components in a vehicle's suspension system that help to reduce body roll and improve stability during cornering. These bars are subjected to significant forces and need to be able to withstand the load. Steel round bars provide the necessary strength and stiffness required for stabilizer bars to effectively perform their function. Additionally, steel is readily available and cost-effective, making it a popular choice for manufacturing stabilizer bars in the automotive industry.

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