Grade AISI 4340 CNBM Forged Steel Round Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 3 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
Grade AISI 4340 CNBM Forged Steel Round Bar
Name | SAE4340 Carbon Steel Round Bar |
Shape | Round Bar/Square Bar/Flat Bar/Plate/Wire |
Standard | GB/ASTM/SAE/AISI/DIN/JIS/EN/BS |
Surface Treatment: | Black/Peeling/Polished/Machined |
Delivery Condition: | Hot Rolled or Forged/Peeled or Black Surface |
Test | SGS/UT 100% Elements Testing |
Certificate: | ISO/Mill Certificate |
Service: | 24 hours online service / |
more than 20 years trading and manufacture | |
Quality Assurance: | the third party inspection, such as SGS, BV, TUV…etc. is acceptable |
Packaging Details: | seaworthy packaging or as per customer's packing instruction |
Machine Capability
Tensile strength (N/mm2Mpa): >=980(100)
Elongation: >=12
Yield strength: >=835(85)
Hardness:( HBS 100/3000)<=269
Reduction of area:>=55
Akv(J)>=78 akv(J/cm2):>=98(10)
Chemical Composition (%):
C | Si | Mn | S | P | Cr | Ni | Cu | Mo |
0.37-0.44 | 0.17-0.37 | 0.40-0.80 | 0.025(max) | 0.025(max) | 0.60-0.90 | 1.25-1.65 | 0.025(max) | 0.15-0.25 |
Packaging & Delivery
Packaging Detail | Sea worthy packing /as per customer's packing instruction |
Delivery Detail | 15 ~ 40 days after receiving the deposit |
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Workshop
FAQ
Are you a trading company or manufacturer? | Manufacturer |
What’s the MOQ? | 3 metric ton |
What’s your delivery time? | 15-35 days after downpayment received |
Do you Accept OEM service? | Yes |
what’s your delivery terms? | FOB/CFR/CIF |
What's the Payment Terms? | 30% as deposit,70% before shipment by T/T |
Western Union acceptable for small amount. | |
L/C acceptable for large amount. | |
Scrow ,Paybal,Alipay are also ok | |
Why choose us? | Chose happens because of quality, then price, We can give you both. |
Additionally, we can also offer professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposals. | |
What's your available port of Shipment? | Main Port, China |
What’s your featured services? | Our service formula: good quality+ good price+ good service=customer's trust |
Where are your Market? | Covering more than 160 countries in the world |
- Q: What are the most common alloys used in special steel?
- The most common alloys used in special steel include stainless steel, tool steel, and high-speed steel.
- Q: How is special steel used in the production of turbine blades?
- Special steel is used in the production of turbine blades due to its exceptional strength, heat resistance, and corrosion resistance properties. These blades have to withstand high temperatures, extreme pressures, and rotational forces, making special steel an ideal material choice. Its exceptional qualities ensure the blades can efficiently convert the energy of steam or gas into mechanical energy, enabling turbines to generate power in various applications such as power plants, aircraft engines, and gas turbines.
- Q: Is special steel suitable for manufacturing surgical instruments?
- Yes, special steel is suitable for manufacturing surgical instruments. Special steel is often used in the production of surgical instruments due to its high strength, corrosion resistance, and ability to maintain sharpness. It meets the stringent requirements of surgical procedures and ensures durability and reliability in medical settings.
- Q: Can special steel be used for cutting tools?
- Yes, special steel can be used for cutting tools. Special steel alloys, such as high-speed steel (HSS) or tool steel, are specifically designed to have enhanced hardness, toughness, and wear resistance, making them ideal for cutting applications. These steel types can maintain their sharpness and withstand high temperatures and forces, ensuring efficient and durable cutting performance.
- Q: What are the different methods of controlling the grain size in special steel?
- To achieve desired mechanical properties and performance, there are multiple approaches available for controlling the grain size in special steel. The following are some of the techniques that can be employed: 1. Alloying: The grain size in steel can be controlled by carefully selecting and managing the composition of alloying elements. Elements like niobium, vanadium, and titanium have proven effective in refining the grain size. 2. Heat treatment: The grain size can be regulated through the process of heat treatment. Techniques such as annealing, normalizing, and quenching can be utilized to manipulate the grain size. For example, slow cooling during annealing encourages the growth of larger grains, while rapid cooling during quenching leads to smaller grain sizes. 3. Deformation processing: Mechanical deformation methods like rolling, forging, or extrusion can aid in refining the grain structure. These processes induce strain and facilitate the formation of smaller and more uniform grains. 4. Grain growth inhibitors: The addition of specific elements like aluminum or zirconium to the steel can act as inhibitors for grain growth. These elements create fine particles that impede the growth of grains during heat treatment, resulting in a smaller grain size. 5. Control of transformation temperature: Manipulating the transformation temperature during heat treatment allows for control over the grain size. Lowering the austenitizing temperature, for example, can yield a finer grain structure in the final product. 6. Rapid solidification: Employing techniques such as spray forming or rapid quenching can lead to an ultrafine-grained microstructure. The rapid cooling prevents grain growth, resulting in a fine and homogeneous grain structure. 7. Severe plastic deformation (SPD) techniques: Techniques like equal channel angular pressing (ECAP) or high-pressure torsion (HPT) impose significant strain on the material, leading to a refined grain structure. These methods are commonly used for producing ultrafine-grained or nanostructured steels. It is essential to consider the desired properties, alloy composition, and intended application of the final product when choosing a method for controlling the grain size in special steel.
- Q: Can special steel be used in high-pressure applications?
- Yes, special steel can indeed be used in high-pressure applications. Special steels, also known as alloy steels, are specifically designed to have enhanced mechanical properties such as high strength, ductility, and corrosion resistance. These properties make them suitable for withstanding high-pressure environments. Special steels are commonly used in industries such as oil and gas, aerospace, automotive, and power generation, where high-pressure applications are encountered. For example, in the oil and gas industry, special steels are used to manufacture high-pressure pipelines, valves, and pressure vessels that can withstand the extreme pressure conditions during oil drilling, transportation, and refining processes. The high strength of special steel allows it to withstand the internal pressure exerted by fluids or gases without deformation or failure. Additionally, its corrosion resistance properties ensure that the steel remains intact and free from damage caused by the harsh operating conditions often associated with high-pressure applications. Moreover, special steels can be tailored to meet specific requirements by adjusting their chemical composition and heat treatment processes. This customization allows the steel to exhibit even higher strength, toughness, and resistance to fatigue, making it ideal for applications involving high-pressure environments. In summary, special steel can be used in high-pressure applications due to its enhanced mechanical properties and corrosion resistance. Its ability to withstand extreme pressures makes it a reliable choice for various industries where high-pressure conditions are encountered.
- Q: How is the quality of special steel ensured?
- The quality of special steel is ensured through a combination of rigorous testing, strict quality control measures, and adherence to international standards and specifications. Special steel producers employ various methods such as chemical analysis, mechanical testing, and non-destructive testing to verify the composition, strength, and integrity of the steel. Additionally, special steel manufacturers often have dedicated quality assurance teams that closely monitor the production process to identify any potential issues and ensure the final product meets the required specifications.
- Q: What are the main factors that affect the machinability of special steel?
- Several factors can influence the machinability of special steel. The composition of the steel itself is one of the main factors. Special steels often contain complex alloys that enhance their properties, such as strength or corrosion resistance. However, these alloying elements can also have a negative impact on machinability. Chromium, nickel, and molybdenum, for example, can make the steel harder to machine due to their hardening or abrasive properties. The microstructure of the steel is another factor that affects machinability. Special steels can undergo heat treatments to achieve desired properties, but these treatments can also alter the microstructure of the material. The presence of carbides or precipitates can make the steel harder and more brittle, leading to increased tool wear and poorer machinability. The hardness of the steel is also important. Harder steels generally have lower machinability as they are more resistant to cutting forces. High-speed steels are often used to counteract this issue. However, excessively hard steels may require specialized tooling or machining techniques to achieve satisfactory results. Impurities or non-metallic inclusions in the steel can disrupt the cutting process and reduce tool life and surface finish. Special steel manufacturers strive to minimize impurities and control inclusion content to improve machinability. Lastly, cutting parameters and machining conditions play a significant role in determining machinability. Factors such as cutting speed, feed rate, and depth of cut must be optimized to achieve the best balance between material removal rate and tool life. Coolant usage and chip evacuation are also crucial considerations to prevent excessive heat buildup and chip recutting, which can negatively impact machinability. In conclusion, the machinability of special steel is affected by factors such as composition, microstructure, hardness, impurities, and cutting parameters. Understanding these factors and employing appropriate machining techniques can help maximize productivity and produce high-quality components from special steels.
- Q: How does special steel perform in high-frequency applications?
- Special steel performs well in high-frequency applications due to its excellent conductivity and high magnetic permeability. These properties allow it to efficiently transmit and handle high-frequency currents and electromagnetic fields, minimizing energy losses and ensuring efficient performance in applications such as transformers, electrical motors, and high-frequency electromagnetic shielding.
- Q: How does special steel contribute to the manufacturing of valves and pumps?
- Special steel plays a crucial role in the manufacturing of valves and pumps. Its exceptional properties such as high strength, corrosion resistance, and heat resistance make it an ideal material choice. Special steel ensures the durability and reliability of valves and pumps, enabling them to withstand harsh conditions, high pressure, and extreme temperatures. Additionally, the precise composition and mechanical properties of special steel allow for efficient fluid flow control and efficient energy transfer in valves and pumps, enhancing their overall performance.
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Grade AISI 4340 CNBM Forged Steel Round Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- 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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