Sea 9260 Spring Steel Bar

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 120000 m.t./month

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C	Si	Mn	S	P	Cr	Ni	Cu
0.52-0.60	1.50-2.00	0.60-0.90	≤0.035	≤0.035	≤0.35	≤0.35	≤0.20

Product Name	Typical Grades	Diameter(mm)	Standard adopted
Carbon Steel	20 (1020/S20C/C22)	Ø16-Ø300	GB/SAE/JIS/DIN
40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing Steel	GCr9 (51100/SUJ1)	Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)
Cr-Mo Steel	20Cr (5120/SCr420H/20Cr4)	Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel	20CrNiMo	Ø16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)

Company Information

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

FAQ

1, Your advantages?

professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

3, Factory or Trading Company?

CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.

4, Payment Terms?

30% TT as deposit and 70% before delivery.

Irrevocable L/C at sight.

5, Trading Terms?

EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.

Packaging & Delivery

1, Packaging: seaworthy package or as required

2, Delivery: 35-45 days or based on quantity

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: What is the difference between a polished and a hot rolled steel round bar?: A polished steel round bar has undergone a process of polishing, which gives it a smooth and shiny surface finish. On the other hand, a hot rolled steel round bar is produced through a hot rolling process, resulting in a rougher and less refined surface texture.

Q: How do you determine the strength of a steel round bar?: The strength of a steel round bar can be determined through various methods, but the most common approach is by conducting a tensile test. This test involves applying a controlled force to the bar until it fractures, allowing for the measurement of its ultimate tensile strength (UTS). Other important parameters, such as yield strength, elongation, and reduction in area, can also be determined from the test results. Additionally, the chemical composition and microstructure of the steel can provide valuable insights into its overall strength and performance characteristics.

Q: How do steel round bars contribute to sustainable construction?: Steel round bars contribute to sustainable construction in several ways. Firstly, steel is a highly durable and long-lasting material, which means that structures built using steel round bars have a longer lifespan and require less maintenance and repairs over time. This reduces the need for frequent replacement, thereby conserving resources and reducing waste. Secondly, steel is a recyclable material, and steel round bars can be easily recycled and reused in other construction projects. By promoting the use of recycled steel, we can reduce the demand for raw materials and minimize the environmental impact associated with steel production. Additionally, steel round bars offer excellent structural strength and flexibility, allowing for more efficient designs and optimized use of materials. This results in lighter and more sustainable structures that require fewer resources to construct. Lastly, steel round bars are often used in reinforced concrete structures, which can enhance the durability and seismic resistance of buildings. By utilizing steel reinforcement, we can ensure the longevity and safety of structures, reducing the need for reconstruction and enhancing the resilience of our built environment. Overall, steel round bars contribute to sustainable construction by promoting durability, recyclability, resource efficiency, and improved structural performance in buildings and infrastructure projects.

Q: Can steel round bars be used in the manufacturing of automotive parts?: Indeed, the utilization of steel round bars in the production of automotive parts is possible. These bars possess numerous advantages that render them suitable for this purpose. Primarily, steel, being a robust and long-lasting material, is ideal for automotive components that necessitate high strength and structural integrity. Furthermore, steel round bars can be easily machined and shaped into various forms and sizes, facilitating the creation of customized automotive parts. Moreover, steel exhibits excellent resistance to heat and can endure high temperatures, making it appropriate for engine components and other parts exposed to extreme heat. Lastly, steel is a cost-effective material, which contributes to its popularity in the automotive industry. In conclusion, steel round bars are a dependable and versatile option when it comes to the manufacturing of automotive parts.

Q: What are the advantages of using nickel-iron alloy steel round bars?: There are several advantages to using nickel-iron alloy steel round bars. Firstly, nickel-iron alloy steel has excellent resistance to corrosion and oxidation. This makes it highly suitable for use in environments where exposure to moisture, chemicals, or high temperatures is expected. The corrosion resistance of this alloy ensures that the round bars will maintain their structural integrity and durability over time, reducing the need for frequent replacements or repairs. Secondly, nickel-iron alloy steel round bars have excellent mechanical properties. They possess high strength, toughness, and hardness, making them suitable for applications that require heavy-duty performance. These round bars can withstand significant stress and load, making them ideal for use in various industries such as construction, manufacturing, and engineering. Additionally, nickel-iron alloy steel offers good thermal stability and resistance to thermal expansion. This means that the round bars will maintain their shape and dimensions even when exposed to extreme temperatures, ensuring their reliability and performance in high-temperature applications. Furthermore, nickel-iron alloy steel has excellent magnetic properties. It exhibits high magnetic permeability, making it suitable for electromagnetic applications such as transformers, inductors, and magnetic shielding. This property enables the round bars to efficiently conduct and distribute magnetic fields, enhancing the performance of these devices. Lastly, the versatility of nickel-iron alloy steel allows for various manufacturing processes and customization options. It can be easily machined, welded, and formed into different shapes and sizes, providing flexibility in design and application. This adaptability makes nickel-iron alloy steel round bars a preferred choice in many industries. In conclusion, the advantages of using nickel-iron alloy steel round bars lie in their corrosion resistance, excellent mechanical properties, thermal stability, magnetic properties, and versatility. These qualities make them reliable, durable, and suitable for a wide range of applications, ensuring optimal performance and longevity.

Q: Can steel round bars be used in the food processing industry?: Steel round bars can indeed be utilized in the food processing sector. Steel is widely applied across various industries owing to its robustness, longevity, and ability to resist corrosion. In the realm of food processing, steel round bars find frequent application in equipment like food mixers, conveyors, and cutting tools. These bars are typically crafted from stainless steel, a specific steel variant enriched with chromium and other elements to enhance its resistance against corrosion and staining. Remarkably, stainless steel is non-reactive and does not introduce any flavors or odors into the processed food. Additionally, it is effortless to clean and maintain, rendering it highly suitable for deployment in food processing facilities where hygiene is paramount. However, it is crucial to ensure that the steel round bars employed in the food processing industry adhere to the necessary standards and regulations to guarantee the safety of the processed food.

Q: What are the different heat treatment processes used for steel round bars?: There are several heat treatment processes that are commonly used for steel round bars to enhance their mechanical properties and improve their overall performance. These processes include annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing: This process involves heating the steel round bars to a specific temperature and then cooling it slowly to relieve internal stresses and improve its ductility. Annealing also refines the grain structure of the steel, making it softer and more workable. 2. Normalizing: Similar to annealing, normalizing involves heating the steel round bars to a specific temperature, but in this case, it is cooled in still air. Normalizing helps to refine the grain structure and improve the steel's mechanical properties, such as strength and toughness. 3. Quenching: Quenching is a rapid cooling process that involves immersing the steel round bars in a quenching medium, such as oil, water, or polymer. This process is used to achieve high hardness and strength by transforming the steel's microstructure, known as martensite formation. However, quenching can also make the steel more brittle, so it is often followed by tempering. 4. Tempering: Tempering is a heat treatment process that involves reheating the quenched steel round bars to a specific temperature and then cooling it slowly. This process helps to reduce the brittleness caused by quenching and improves the steel's toughness and ductility. The temperature and duration of tempering can be adjusted to achieve the desired mechanical properties. 5. Case hardening: Case hardening is a surface heat treatment process used to increase the hardness and wear resistance of the steel round bars. It involves introducing carbon or other alloying elements to the surface of the steel and then heating it to a specific temperature. This process forms a hardened outer layer while maintaining a tough core. These different heat treatment processes provide steel round bars with a wide range of mechanical properties and performance characteristics, allowing them to be used in various applications, including automotive, construction, manufacturing, and aerospace industries. The specific heat treatment process selected depends on the desired properties, the steel composition, and the intended application of the round bars.

Q: Can steel round bars be used for making body panels?: No, steel round bars are not typically used for making body panels. Body panels are usually made from sheet metal or aluminum, as they offer better flexibility, ease of shaping, and weight reduction compared to steel round bars.

Q: The difference between galvanized round bar and galvanized flat steel: Galvanized round bar and galvanized flat steel are of different shapes and different uses.

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