Forged Pre-harden AISI 4340 Steel Round Bars Supplier
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 500000 m.t./month
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Specification
Forged Pre-harden AISI 4340 Steel Round Bars Supplier
Product Description of Forged Pre-harden AISI 4340 Steel Round Bars Supplier
1. Steel grade: ASTM4140, SCM440, 42CrMo, DIN1.7225
2. Length: 6M-12M
3. Diameter: 16mm-300mm
4. Product range: round bar, flat bar, square bar
5. Technique: Hot rolled, forged, cold drawn
Specification of Forged Pre-harden AISI 4340 Steel Round Bars Supplier
Material | SCM4140 | Round bar | Dia(mm) | 16-300mm |
Process | EAF + LF + VD + Forged + Heat Treatment (optional) | Length (mm) | Max 12m | |
Heat treatment | Normalized / Annealed / Quenched / tempered | Flat bar | Thickness(mm) | 8-500mm |
Delivery condition | Hot forged +Rough machined (black surface after Q/T)+ Turned (optional) | Width(mm) | 70-200mm | |
Test | Ultrasonic test according to SEP 1921-84 D/d | Length (mm) | Max 12m |
Chemical Composition of Forged Pre-harden AISI 4340 Steel Round Bars Supplier
C | Si | Mn | Cr | Mo | P | S |
0.38~0.43 | 0.15~0.35 | 0.75~1.00 | 0.8~1.1 | 0.15~0.25 | ≤0.035 | <0.04< td=""> |
Photo Show of Forged Pre-harden AISI 4340 Steel Round Bars Supplier
Packing and Delivery:
Packing in bundle package, or as customer's requirements.
Delivery Detail: 45 days after receiving the deposit.
Usage and Applications of Forged Pre-harden AISI 4340 Steel Round Bars Supplier
1. Steel round bar is used in 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.
2. And we can use this kind of product on the performance of the mechanical parts if the demand is not very high.
3. Some special material steel round bar can be used for main shaft of steamer, hummer shank, with big section and supper force.
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.
F A Q
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 advantages of using bearing steel round bars?
- There are several advantages of using bearing steel round bars. Firstly, bearing steel has high hardness and wear resistance, which ensures durability and longevity of the bearings. Secondly, bearing steel has excellent dimensional stability and can withstand high temperatures, making it suitable for applications with heavy loads and high-speed rotations. Additionally, bearing steel round bars have excellent surface finish and low friction coefficient, resulting in smooth and efficient operation. Lastly, bearing steel has good corrosion resistance, reducing the risk of rust and prolonging the lifespan of the bearings.
- Q: How do you prevent rusting of steel round bars?
- To prevent rusting of steel round bars, there are several effective measures that can be taken: 1. Apply a protective coating: One of the most common ways to prevent rusting is by applying a protective coating on the steel round bars. This can be done by using paint, varnish, or a specialized rust-preventive coating. The coating acts as a barrier between the steel surface and the surrounding environment, preventing moisture and oxygen from reaching the metal and causing rust. 2. Keep the steel dry: Moisture is a key factor that contributes to the corrosion of steel. Therefore, it is crucial to keep the steel round bars as dry as possible. This can be achieved by storing them in a dry environment or using dehumidifiers in areas where moisture levels are high. 3. Maintain proper ventilation: Adequate ventilation helps in preventing the accumulation of moisture around the steel round bars. Good air circulation allows any moisture that may be present to evaporate, reducing the risk of rust formation. 4. Implement a rust inhibitor: Rust inhibitors, also known as corrosion inhibitors, can be applied to the steel round bars to prevent rust formation. These inhibitors work by chemically reacting with the metal surface, forming a protective layer that inhibits the oxidation process. Rust inhibitors can be in the form of oils, waxes, or specialized compounds. 5. Store in a controlled environment: If the steel round bars are not immediately being used, it is essential to store them in a controlled environment. This typically means keeping them in a dry, temperature-controlled area to minimize exposure to moisture and extreme temperatures, both of which can accelerate rust formation. 6. Regular maintenance and inspection: It is advisable to regularly inspect the steel round bars for signs of rust or damage. If any rust spots are detected, they should be promptly cleaned and treated with a rust remover or inhibitor to prevent further corrosion. By following these preventive measures, the rusting of steel round bars can be significantly reduced, ensuring their longevity and maintaining their structural integrity.
- Q: What are the advantages of using steel round bars in construction?
- There are several advantages of using steel round bars in construction: 1. Strength and Durability: Steel round bars are known for their exceptional strength and durability. They have a high tensile strength, which means they can withstand heavy loads and provide robust support. This makes them ideal for construction projects that require structural integrity and stability. 2. Versatility: Steel round bars come in various sizes and grades, offering versatility in construction. They can be easily shaped, bent, and welded to fit specific design requirements, making them suitable for a wide range of applications. Whether it's for building frameworks, reinforcement in concrete structures, or even decorative elements, steel round bars can be tailored to meet different project needs. 3. Cost-effectiveness: Steel round bars offer cost-effectiveness in construction due to their long lifespan and low maintenance requirements. They are resistant to corrosion, weathering, and pests, which reduces the need for frequent repairs or replacements. Additionally, their strength allows for the utilization of lighter construction materials, leading to potential cost savings in the overall project. 4. Fire Resistance: Steel round bars have excellent fire-resistant properties, making them a safe choice for construction. They do not burn, melt, or emit toxic fumes under high temperatures, which can be crucial in preventing the spread of fire and ensuring the safety of occupants. 5. Sustainability: Steel is a highly sustainable material as it is 100% recyclable. Using steel round bars in construction contributes to reducing environmental impact by minimizing waste and conserving natural resources. Additionally, the process of recycling steel requires less energy compared to manufacturing it from raw materials, making it an eco-friendly choice. 6. Availability and Quality Control: Steel round bars are readily available in the market, making them easily accessible for construction projects. Moreover, their production undergoes strict quality control measures, ensuring consistent and reliable material properties. This guarantees the structural integrity and safety of the constructed buildings or infrastructures. In conclusion, the advantages of using steel round bars in construction include their strength, versatility, cost-effectiveness, fire resistance, sustainability, availability, and quality control. These attributes make them a popular choice for builders and engineers seeking reliable and efficient materials for their construction projects.
- Q: How many roots are there in a standard ton of steel and how many meters are there in a steel bar?
- The general drawing bar is 6 meters, some ribbed bars 9 meters and 12 meters two tons of steel; a number of roots can not say, can be 1 or 100 roots, the length of thickness do not know how to tell you how many tons of reinforced root ah.
- Q: What are the different types of steel round bar surface finishes?
- Steel round bars can be treated with various surface finishes to meet different needs. Some of the most commonly used finishes are: 1. Bright: By polishing the steel round bar, a shiny and reflective surface is achieved. This finish is often employed for decorative purposes or when aesthetics are important. 2. Grinded: To achieve a smooth and even surface, the outer layer of the steel round bar is removed using a grinding wheel or abrasive belt. This finish is useful for eliminating imperfections or creating a uniform surface for further processing. 3. Brushed: Fine lines are created on the surface of the steel round bar using a wire brush or abrasive pad. This finish is preferred for its unique aesthetic appeal and is commonly used in architectural applications. 4. Powder-coated: Dry powder is applied to the surface of the steel round bar and then cured using heat. This finish provides a durable and corrosion-resistant coating that can be applied in various colors and textures. 5. Galvanized: A protective zinc coating is applied to the steel round bar to prevent corrosion. This finish is commonly used in outdoor or marine applications where the steel is exposed to moisture or harsh environmental conditions. 6. Oiled: A thin layer of oil is applied to the surface of the steel round bar. This finish offers temporary protection against corrosion and is often used for short-term storage or transportation purposes. 7. Shot-blasted: Small metallic or non-metallic particles are propelled at high speeds onto the surface of the steel round bar. This process creates a textured finish that improves the adhesion of subsequent coatings or paints. Each type of surface finish has its own unique advantages and is selected based on the specific requirements of the application.
- Q: What is the difference between a hot-finished and a cold-finished steel round bar?
- The main difference between a hot-finished and a cold-finished steel round bar lies in the manufacturing process. A hot-finished steel round bar is produced by heating the steel billet or ingot to high temperatures and then rolling it into the desired shape. This process results in a rougher surface, with the bar exhibiting a scale or oxidation layer. On the other hand, a cold-finished steel round bar is produced by further processing the hot-finished bar through additional steps like cold drawing, turning, grinding, or polishing. This process enhances the dimensional accuracy, surface finish, and mechanical properties of the bar. The cold-finished bar has a smoother surface and tighter tolerances, making it suitable for applications that require precision and a higher-quality finish. In summary, while both hot-finished and cold-finished steel round bars serve the same purpose, the cold-finished bar offers improved dimensional accuracy, surface finish, and mechanical properties due to additional processing steps.
- Q: What are the different cutting methods for steel round bars?
- There are several cutting methods for steel round bars, including sawing, shearing, flame cutting, and abrasive cutting.
- Q: Are steel round bars suitable for outdoor sculptures?
- Yes, steel round bars are suitable for outdoor sculptures due to their durability, weather resistance, and versatility in shaping various forms and designs.
- Q: Can steel round bars be used for making marine equipment?
- Yes, steel round bars can be used for making marine equipment. Steel is a versatile and durable material that is commonly used in the marine industry due to its strength, corrosion resistance, and ability to withstand harsh environmental conditions. Steel round bars can be machined, welded, and formed into various shapes and sizes to meet the specific requirements of marine equipment. They are commonly used for manufacturing marine components such as propeller shafts, rudders, anchor chains, and structural supports. Additionally, steel can be coated or treated to enhance its corrosion resistance, making it suitable for prolonged exposure to saltwater and other corrosive elements found in marine environments.
- Q: How can steel round bars be protected against corrosion?
- Steel round bars can be protected against corrosion through various methods such as applying a protective coating, galvanizing, using corrosion inhibitors, or implementing cathodic protection. These techniques form a barrier between the steel surface and corrosive elements, preventing or slowing down the process of corrosion.
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Forged Pre-harden AISI 4340 Steel Round Bars Supplier
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 500000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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