Grade S235JR CNBM Carbon Steel Round Bar with High Quality
- 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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Specification
Type:
Carbon Steel
Shape:
Steel Round Bar
Product Description
S235jr Steel Round Bars/round ba
Grade:SS400, A36, Q235
Size:8mm-35mm
Technique: hot rolled
Certification: CE,SGS,ISO
Chemical Composition
C | Si | Mn | P | S | S |
0.14~0.22% | ≤0.30 | 0.30~0.65 | ≤0.045 | ≤0.050 | ≤0.050 |
Application:
Mold bottom,
Plastic mold
Construction machinery parts
Automobile parts
Security grills
Screens
Construction
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
Products 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 factors affecting the fatigue strength of special steel?
- The fatigue strength of special steel is influenced by several main factors: 1. Material composition: The chemical composition of special steel plays a significant role in determining its fatigue strength. Alloying elements such as carbon, chromium, molybdenum, and nickel can enhance the material's resistance to fatigue by improving its ability to withstand cyclic loading. 2. Microstructure: The microstructure of special steel, including the grain size, crystallographic texture, and presence of any precipitates or phases, can significantly affect its fatigue strength. Fine-grained structures generally exhibit higher fatigue strength due to reduced stress concentrations and improved resistance to crack initiation and propagation. 3. Surface condition: The surface finish and integrity of special steel can have a significant impact on its fatigue strength. Surface defects, such as scratches, notches, or roughness, can act as stress concentrators and initiate fatigue cracks. Proper surface treatments, such as grinding or shot peening, can improve the fatigue resistance by reducing stress concentrations and introducing compressive residual stresses. 4. Heat treatment: The heat treatment process used to modify the structure and properties of special steel can also affect its fatigue strength. Proper heat treatment techniques, such as quenching and tempering, can optimize the material's microstructure, improve its hardness, and enhance its resistance to fatigue. 5. Loading conditions: The type and magnitude of cyclic loading applied to special steel significantly influence its fatigue strength. Factors such as stress amplitude, mean stress, load ratio (ratio of minimum to maximum stress), and frequency of loading can all impact the fatigue life of the material. 6. Environmental conditions: The presence of corrosive environments, high temperatures, or other harsh conditions can decrease the fatigue strength of special steel. Environmental factors can accelerate crack initiation and propagation, leading to reduced fatigue life. Proper selection of corrosion-resistant alloys or protective coatings can mitigate the adverse effects of the environment on fatigue strength. By considering and optimizing these factors, manufacturers and engineers can enhance the fatigue strength of special steel, ensuring its reliability and longevity in various applications.
- Q:How does mold steel resist wear and erosion?
- Mold steel resists wear and erosion due to its high hardness, toughness, and resistance to deformation. It has a fine microstructure that allows it to withstand the repetitive stresses and strains associated with molding processes. Additionally, certain alloying elements like chromium and molybdenum enhance its corrosion resistance, making it more durable against wear and erosion caused by environmental factors.
- Q:What are the different methods of preventing intergranular corrosion in special steel?
- There are several methods available to prevent intergranular corrosion in special steel. 1. Heat Treatment: One effective method is to subject the steel to a heat treatment process called solution annealing. This involves heating the steel to a high temperature and then rapidly cooling it. This process helps to dissolve any precipitates or carbides that may have formed along the grain boundaries, thus reducing the risk of intergranular corrosion. 2. Alloying: Another approach is to add specific alloying elements to the steel composition. For example, the addition of elements like chromium and molybdenum can enhance the steel's resistance to intergranular corrosion. These alloying elements form a protective oxide layer on the surface, preventing corrosion from occurring along the grain boundaries. 3. Passivation: Passivation involves treating the steel surface with chemicals that create a protective layer. This layer acts as a barrier, preventing the corrosive environment from reaching the grain boundaries. Commonly used passivation techniques include acid pickling and electrochemical methods. 4. Sensitization Control: Special attention must be given to the sensitization process, which occurs when the steel is exposed to high temperatures for a prolonged period. This can lead to the precipitation of chromium carbides along the grain boundaries, making the steel susceptible to intergranular corrosion. By carefully controlling the heating and cooling rates during processing, sensitization can be minimized or prevented. 5. Corrosion Inhibitors: Another option is to use corrosion inhibitors, which are chemicals that can be applied to the steel surface to protect it from corrosion. These inhibitors form a protective film on the surface, preventing the corrosive agents from attacking the grain boundaries. It is important to note that the specific method used will depend on the type of special steel and the intended application. The selection of the most appropriate method should be based on a thorough understanding of the steel's composition, processing conditions, and the anticipated corrosive environment.
- Q:How does special steel contribute to the power generation equipment industry?
- Special steel plays a crucial role in the power generation equipment industry by providing exceptional strength, durability, and corrosion resistance. It is extensively used in the manufacturing of turbines, generators, and other critical components, ensuring their reliable performance under extreme conditions. Special steel's high temperature and pressure resistance make it ideal for power plants, enabling efficient energy conversion and minimizing downtime. Additionally, its ability to withstand harsh environments and resist fatigue and wear extends the lifespan of power generation equipment, reducing maintenance costs and enhancing overall productivity in the industry.
- Q:What are the main applications of special steel in the medical implants?
- Special steel is widely used in medical implants due to its unique properties and benefits. The main applications of special steel in medical implants include orthopedic implants such as hip and knee replacements, dental implants, cardiovascular devices like stents and pacemakers, and surgical instruments. The high strength, corrosion resistance, biocompatibility, and ability to be sterilized make special steel an ideal material for these applications, providing long-lasting and reliable solutions for patients in need of medical implants.
- Q:Can special steel be used in the defense sector?
- Yes, special steel can be used in the defense sector. Special steel refers to alloys or compositions that are specifically designed to possess certain properties, such as high strength, hardness, resistance to corrosion, or heat resistance. These properties make special steel suitable for various defense applications, including the construction of armored vehicles, naval vessels, aircraft, and weaponry. In the defense sector, special steel can be used to manufacture components and structures that require exceptional strength and durability. For example, it can be used in the production of armor plates for tanks and armored vehicles, which need to withstand high impact and ballistic threats. Special steel can also be utilized in the construction of naval vessels, where it provides resistance to corrosion and enhances the overall structural integrity. Furthermore, special steel is crucial in the defense industry for the manufacturing of aircraft parts and weaponry. Aircraft components, such as landing gear, engine parts, and structural elements, require high-strength materials to ensure safe and reliable operation. Special steel alloys can provide the necessary strength and resistance to extreme conditions, such as high temperatures and pressures, making them ideal for these applications. Moreover, special steel can be used in the production of various types of weapons, including firearms and blades. Its excellent strength and hardness properties make it suitable for manufacturing gun barrels, bulletproof vests, and knives used by military personnel. In summary, special steel is highly valued in the defense sector due to its exceptional properties, including strength, hardness, corrosion resistance, and heat resistance. It finds extensive applications in the construction of armored vehicles, naval vessels, aircraft, and weaponry, ensuring the safety, durability, and effectiveness of military equipment.
- Q:Can special steel be used for making marine components?
- Yes, special steel can be used for making marine components. Special steel, also known as marine grade steel, is specifically designed to withstand the harsh conditions of marine environments. These environments are exposed to corrosion, high humidity, and saltwater, which can cause regular steel to deteriorate quickly. Marine grade steel is typically made with added alloys, such as nickel, chromium, and molybdenum, which provide excellent corrosion resistance and durability. These alloys help the steel resist the corrosive effects of saltwater and prevent rusting. Additionally, special steel is often coated with protective coatings or treated to further enhance its resistance to corrosion. Marine components made from special steel include ship hulls, propellers, shafts, valves, pipelines, and various structural elements. The use of special steel ensures the longevity and reliability of these components in demanding marine conditions. Furthermore, the strength and toughness of special steel make it suitable for withstanding the high mechanical stresses and impacts experienced at sea. In summary, special steel is an ideal material for making marine components due to its superior corrosion resistance, durability, and strength. It helps to ensure the longevity and reliability of marine structures and equipment in harsh marine environments.
- Q:What are the different high-temperature grades of special steel?
- There are several different high-temperature grades of special steel that are designed to withstand extreme heat and provide enhanced mechanical properties. Some of the most commonly used high-temperature grades include: 1. Stainless steel 310: This grade is known for its excellent resistance to oxidation at high temperatures. It has a high chromium and nickel content, which provides good corrosion resistance and high strength at elevated temperatures. 2. Inconel 625: Inconel alloys are nickel-based superalloys that are highly resistant to oxidation and corrosion. Inconel 625, in particular, offers excellent strength and toughness at high temperatures, making it suitable for applications in the aerospace and chemical processing industries. 3. Hastelloy X: Hastelloy X is a nickel-chromium-iron-molybdenum alloy that exhibits exceptional strength and oxidation resistance at high temperatures. It is commonly used in gas turbine engines, industrial furnace components, and other high-temperature applications. 4. Alloy 800H: This grade of special steel is an austenitic alloy with high resistance to oxidation, carburization, and nitridation. It is often used in heat exchangers, furnace components, and petrochemical applications. 5. Titanium Grade 5: Although not technically a steel, titanium grade 5 is a high-temperature alloy that offers outstanding strength and corrosion resistance at elevated temperatures. It is commonly used in aircraft engine components, chemical processing equipment, and marine applications. These are just a few examples of the high-temperature grades of special steel available in the market. Each grade is specifically designed to excel in different applications where extreme heat resistance and mechanical properties are required.
- Q:What are the different forming techniques used for special steel?
- Some of the different forming techniques used for special steel include rolling, forging, extrusion, and casting.
- Q:What are the different methods of non-destructive testing for special steel?
- Special steel can be evaluated for quality and integrity without causing damage using various non-destructive testing (NDT) methods. These methods encompass: 1. Ultrasonic Testing (UT): By emitting high-frequency sound waves with a transducer, defects like cracks or voids within the special steel can be detected. The reflections or echoes are then analyzed to identify any anomalies. 2. Magnetic Particle Testing (MT): This technique relies on magnetic fields to primarily detect surface or near-surface defects in special steel. Inducing a magnetic field in the material and applying magnetic particles allows any discontinuities or defects to gather, forming visible indications. 3. Liquid Penetrant Testing (PT): Involving the application of a liquid dye or penetrant to the special steel's surface, this method draws the penetrant into any surface defects through capillary action. After removing excess penetrant and applying a developer, the indications become visible. 4. Radiographic Testing (RT): This technique employs X-rays or gamma rays to inspect the internal structure of special steel. By exposing the material to radiation and capturing the transmitted radiation on film or a digital detector, any inconsistencies or defects within the material become visible on the resulting image. 5. Eddy Current Testing (ECT): Mainly used for detecting surface or near-surface defects, ECT involves inducing an alternating current into a coil to create an electromagnetic field. Variations in the material's electrical conductivity or magnetic permeability caused by defects generate changes in the coil's impedance, which can be analyzed. 6. Visual Testing (VT): While not a direct NDT method, visual inspection serves as a preliminary step to identify surface defects or irregularities in special steel. By thoroughly visually examining the material with appropriate lighting and magnification tools, any issues can be detected. These diverse methods of non-destructive testing offer valuable insights into special steel's quality, ensuring its structural integrity and reliability across various applications. The selection of a specific method depends on factors like the type and location of the defect being sought, as well as the industry or application's specific requirements.
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Grade S235JR CNBM Carbon Steel Round Bar with High Quality
- 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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