Grade DIN 20Cr4 CNBM Alloy Steel Round Bar Made in China
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 3 m.t.
- Supply Capability:
- 10000 m.t./month
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Item specifice
Type:
Alloy Steel
Shape:
Steel Round Bar
Product Description
1. Diameter: 8mm-250mm rou
2. Length: 2m, 3m, 5.8m, 6m or customized
3. Standard: GB, ASTM, AISI, SAE, DIN, JIS, EN
4. Produce Process: smelt iron - EAF smelt billet - ESR smelt billet -hot rolled or forged -steel round bar and plate
5. Heat Treatment: annealing, normalizing, tempering, quenching
6. Surface Treatment: Black, Polished, Galvanized
7. Quality Assurance: We accept third party inspection for all orders.
You can ask testing organizations such as SGS, BV, etc. to test our products before shipping.
Chemical Composition
Grade | Dia.(mm) | C | Si | Mn | Cr | P | S | Ni | Cu |
5120 | 16-85 | 0.18-0.24 | 0.17-0.37 | 0.50-0.80 | 0.70-1.00 | ≤0.035 | ≤0.035 | ≤0.03 | ≤0.03 |
5140 | 16-400 | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.10 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.03 |
4135 | 13-230 | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | ≤0.035 | ≤0.035 | ≤0.03 | ≤0.03 |
4140 | 13-360 | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | ≤0.035 | ≤0.035 | ≤0.03 | ≤0.03 |
Application:
Mechanism & Fasteners gear,
Stressed components for vehicles
Engines and machines
Parts of larger cross-section
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.
Packing & Delivery
1. Packaging: seaworthy package or as required
2. Delivery: 35-45 days or based on quantity
Product Show
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.
- Q:What are the main applications of special steel in the telecommunications sector?
- Special steel is commonly used in the telecommunications sector for various applications. One of the main uses of special steel in this industry is for the manufacturing of transmission towers and antenna structures. These steel structures provide the necessary support and stability for telecommunication equipment, ensuring reliable signal transmission. Additionally, special steel is also utilized in the production of cables and wires, which are crucial for transmitting data and electricity in telecommunication networks. The high strength and durability of special steel make it ideal for withstanding the harsh outdoor conditions that telecommunication infrastructure often faces.
- Q:How does special steel contribute to the fatigue resistance of products?
- Special steel contributes to the fatigue resistance of products by providing enhanced strength, durability, and resistance to wear and tear. The unique composition and manufacturing processes of special steel result in improved mechanical properties, such as higher tensile strength and hardness, which help products withstand repeated loading and stress cycles without failure. Additionally, special steel can be engineered to have specific microstructures that enhance its resistance to fatigue, preventing the growth of cracks and ensuring longer product lifespan.
- Q:What are the machining techniques for special steel?
- Some of the machining techniques commonly used for special steel include milling, turning, drilling, grinding, and broaching. These techniques are employed to shape and finish the special steel material according to the desired specifications and requirements. Additionally, special attention is given to selecting appropriate cutting tools, speeds, and feeds to ensure efficient and precise machining.
- Q:What are the safety benefits of using special steel?
- Using special steel can provide several safety benefits in various applications. One of the main advantages is its enhanced strength and durability compared to traditional steel. Special steel is often designed to withstand extreme conditions, such as high temperatures or corrosive environments, making it ideal for applications in industries like aerospace, automotive, and oil and gas. The high strength of special steel allows for the construction of safer and more reliable structures. It can withstand heavy loads, reducing the risk of structural failures or collapses. This is crucial in industries where the safety of workers, equipment, and the general public is of utmost importance. Another safety benefit of special steel is its resistance to corrosion. Corrosion can weaken structures and compromise their safety. Special steel is often alloyed with elements like chromium, nickel, or molybdenum, which provide excellent corrosion resistance. This makes it suitable for applications in marine environments, chemical processing plants, or any setting where exposure to moisture or chemicals is a concern. Special steel is also known for its ability to retain its mechanical properties at high temperatures. This makes it an excellent choice for applications where heat resistance is crucial, such as in the construction of fire-resistant structures or in the manufacturing of industrial ovens and furnaces. By using special steel in these applications, the risk of structural failure or fire-related accidents can be significantly reduced. Furthermore, special steel can offer improved fatigue resistance, which is important in applications subject to cyclic loading or vibration. Fatigue failure can occur when a material experiences repeated stress over time, leading to cracks and eventual failure. Special steel can be engineered to have excellent fatigue properties, reducing the likelihood of unexpected failures and improving the overall safety of structures or equipment. In summary, the safety benefits of using special steel include enhanced strength, durability, corrosion resistance, heat resistance, and fatigue resistance. These properties make special steel a reliable choice for industries where safety is a top priority, ensuring the protection of workers, equipment, and the general public.
- Q:What are the different chemical resistance grades of special steel?
- Special steels, commonly known as stainless steels, possess exceptional resistance to corrosion and chemical attack. They are a category of alloys that contain a substantial amount of chromium, which forms a protective oxide layer on the surface, preventing further corrosion. The chemical resistance of special steel may vary depending on the particular grade or alloy composition. Below are some of the typical chemical resistance grades of special steel: 1. Austenitic Stainless Steel: This is the most prevalent stainless steel type and exhibits excellent resistance to a broad range of chemicals, including organic acids, alkalis, and salts. The most commonly used grade in this category is 304 stainless steel. 2. Ferritic Stainless Steel: Ferritic stainless steels have lower corrosion resistance compared to austenitic grades but still offer good resistance to many chemicals. They are particularly resistant to nitric acid and some organic acids. Grade 430 stainless steel serves as a common example of ferritic stainless steel. 3. Martensitic Stainless Steel: Martensitic stainless steels are recognized for their high strength and hardness. Although they have lower corrosion resistance compared to austenitic and ferritic grades, they can still exhibit good resistance to certain chemicals, especially in mildly corrosive environments. 4. Duplex Stainless Steel: This type of stainless steel combines the properties of both austenitic and ferritic grades, resulting in enhanced strength and improved resistance to stress corrosion cracking. Duplex stainless steels offer excellent resistance to a wide range of chemicals, including organic acids, chloride-containing solutions, and saltwater. 5. Precipitation-Hardening Stainless Steel: These steels can undergo heat treatment to achieve high strength and corrosion resistance. They typically exhibit resistance to a broad range of chemicals, including organic acids, alkalis, and some organic solvents. It is crucial to note that the chemical resistance of any steel grade can also be affected by factors such as temperature, chemical concentration, and the presence of other corrosive agents. Therefore, it is advisable to consult the manufacturer's specifications or seek expert advice when selecting a special steel grade for specific chemical resistance requirements.
- Q:Can special steel be used in the aerospace industry?
- Yes, special steel can be used in the aerospace industry. Special steel alloys, such as stainless steel and high-temperature alloys, are often utilized in the aerospace industry due to their excellent strength, corrosion resistance, and high-temperature capabilities. These properties make special steel an essential material for components like aircraft engines, landing gear, and structural parts, ensuring safety and reliability in the aerospace industry.
- Q:How does surface treatment enhance the performance of special steel?
- Surface treatment enhances the performance of special steel by improving its corrosion resistance, wear resistance, and overall durability. It can also enhance the aesthetic appearance of the steel and provide additional functionalities such as anti-fingerprint or anti-glare properties. Surface treatments like coatings, plating, or heat treatment techniques can alter the surface characteristics of the steel, making it more resistant to harsh environments, reducing friction, and increasing its lifespan, ultimately enhancing its performance.
- Q:How is special steel used in the production of cutting blades?
- Special steel is used in the production of cutting blades because it possesses unique properties that make it highly durable, resistant to wear and tear, and capable of maintaining a sharp edge for longer periods of time. This type of steel is often chosen for its high hardness, toughness, and corrosion resistance, making it ideal for manufacturing cutting blades that can withstand intense cutting forces and harsh working environments.
- Q:How does the heat treatment process affect the properties of special steel?
- The properties of special steel are greatly affected by the heat treatment process. This process involves controlled heating and cooling of the steel to modify its microstructure and, as a result, its mechanical properties. To begin, heat treatment can increase the hardness of special steel. By heating the steel to a specific temperature and then rapidly cooling it through quenching, the steel undergoes a phase transformation that boosts its hardness. This is especially advantageous for applications that demand high strength and resistance to wear, such as cutting tools or bearings. Furthermore, heat treatment can enhance the toughness of special steel. By tempering the quenched steel at a lower temperature, the brittleness caused by rapid cooling can be minimized, leading to improved toughness and ability to withstand impacts. This is crucial in applications where the steel must endure sudden shocks or impacts, like in automotive or aerospace components. Moreover, heat treatment can also improve the overall strength of special steel. Through a combination of heating, cooling, and tempering processes, the steel's grain structure can be refined, resulting in increased strength and resistance to deformation. This is particularly critical for structural applications where the steel must withstand heavy loads or extreme conditions. Additionally, the heat treatment process can influence the corrosion resistance of special steel. By subjecting the steel to specific heat treatment cycles, the formation of certain phases or chemical compounds can be encouraged, leading to enhanced resistance against corrosion or oxidation. This is essential for applications exposed to harsh environments or corrosive substances, such as in marine or chemical industries. In conclusion, the heat treatment process is essential in modifying the properties of special steel. By carefully controlling the heating, cooling, and tempering cycles, the hardness, toughness, strength, and corrosion resistance of the steel can be significantly improved. This allows for the production of special steel with customized properties to meet the specific requirements of various industrial applications.
- Q:How does special steel contribute to the telecommunications equipment industry?
- Special steel plays a crucial role in the telecommunications equipment industry by providing high-quality materials that ensure the durability, functionality, and performance of various components. It is used in manufacturing transmission towers, antenna mounts, cables, connectors, and other critical infrastructure. The strength, corrosion resistance, and electrical conductivity of special steel enable the reliable transmission of signals, support the weight of equipment, and protect against external factors such as weather conditions. Overall, special steel contributes to the efficiency and reliability of telecommunications equipment, ensuring seamless connectivity and communication.
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Grade DIN 20Cr4 CNBM Alloy Steel Round Bar Made in China
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 3 m.t.
- Supply Capability:
- 10000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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