Special Steel AISI 4140 Round Bar Steel
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- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
Standard:
AISI,JIS,GB,BS,DIN,API,EN,ASTM
Thickness:
as required
Technique:
Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Extruded,EFW,Spring
Shape:
U Channel,Square,C Channel,Hexagonal,Round
Surface Treatment:
Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B)
Certification:
ISO,SGS,BV,IBR,RoHS,CE,API,BSI,UL
Length:
as required
Net Weight:
as required
Chemical Composition(%)
| C | Si | Mn | Cr | Mo | Ni | P | S |
| 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | ≤0.030 | ≤0.030 | ≤0.030 |
Standard
| GB | AISI | DIN | JIS | ISO |
| 42CrMo | 4140 | 42CrMo4 | SCM440 | 42CrMo4 |
Available Size
| Rolled round bar | φ20-120mm × L |
| Forged round bar | φ130-195mm × L |
Heat Treatment
| Item | Temperature℃ | Hardness |
| quenching | 840-880 | HRC32-34 |
| tempering | 580 | |
| quenching | 900 | HRC54-60 |
| tempering | 150-180 |
Characterstics
| The steel with high strength and toughness, hardenability is better also | |||||||
| After conditioning treatment quenching deformation of small | |||||||
| high fatigue limit and repeated impact resistance |
Applications: The steel is suitable for manufacturing requires a certain strength and toughness of large and medium-sized plastic mold
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, Payment Terms?
30% TT as deposit and 70% before delivery.
Irrevocable L/C at sight.
4, Trading Terms?
EXW, FOB, CIF, FFR, CNF
6, After-sale Service?
WE 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 challenges in machining special steel?
- Machining special steel can present several challenges due to its unique properties. One of the main challenges is its high hardness, which requires specialized cutting tools and techniques to effectively shape the steel. Another challenge is the tendency of special steel to work harden, making it more difficult to machine as the process progresses. Additionally, special steel often contains alloying elements that can cause increased tool wear and heat generation during machining, necessitating careful selection of cutting parameters to maintain tool life and prevent thermal damage. Finally, the inherent toughness of special steel can also pose challenges in terms of chip formation and control, as well as potential tool breakage. Overall, machining special steel demands expertise, precision, and appropriate tooling to overcome these challenges and achieve desired results.
- Q: What are the properties of nitrogen alloyed steel?
- Nitrogen alloyed steel exhibits improved strength, hardness, and corrosion resistance compared to traditional steel due to the addition of nitrogen. It also demonstrates enhanced wear resistance and increased toughness, making it suitable for various applications such as automotive, construction, and machinery industries.
- Q: What are the different forming techniques used for special steel?
- Some of the different forming techniques used for special steel include hot forging, cold forging, extrusion, rolling, and casting.
- Q: How does special steel contribute to the construction sector?
- Special steel plays a crucial role in the construction sector by offering a wide range of benefits that contribute to the overall quality, durability, and safety of structures. Firstly, special steel possesses exceptional strength and toughness, making it an ideal material for constructing high-rise buildings, bridges, and other infrastructure projects. Its high tensile strength allows for the creation of lighter and more slender structures, reducing material costs and enabling architects to design innovative and aesthetically pleasing buildings. Moreover, special steel is highly resistant to corrosion, which is particularly important in construction projects located in harsh environments, such as coastal areas or industrial zones. This resistance ensures that structures built with special steel have a longer lifespan and require less maintenance, resulting in significant cost savings over time. Additionally, its resistance to fire and extreme temperatures makes it an essential material for fire-resistant structures and critical components in buildings, ensuring the safety of occupants. Special steel also offers excellent ductility and weldability, allowing for seamless integration with other construction materials and facilitating efficient assembly processes. Its versatility enables it to be used in various structural elements, such as beams, columns, and reinforcement bars, providing stability and structural integrity to buildings, as well as improving seismic performance. Furthermore, the use of special steel in construction aligns with sustainability goals. It is a recyclable material that can be reused without compromising its properties, reducing the environmental impact of the construction sector. Furthermore, its lighter weight compared to traditional materials minimizes the carbon footprint associated with transportation and installation. In summary, special steel contributes significantly to the construction sector by providing strength, durability, fire resistance, corrosion resistance, and versatility. Its use enables the construction of safer, more cost-effective, and environmentally-friendly structures, thereby enhancing the overall quality and sustainability of the built environment.
- Q: How is maraging steel used in the production of rocket and missile components?
- Maraging steel is commonly used in the production of rocket and missile components due to its exceptional strength, toughness, and resistance to corrosion. Its unique properties allow for the creation of lightweight yet highly durable parts, such as rocket nozzles, casings, and guidance systems. Additionally, maraging steel can withstand extreme temperatures and pressures, making it suitable for the demanding conditions of space and military applications.
- Q: What are the characteristics of high-speed steel?
- High-speed steel is known for its exceptional hardness, wear resistance, and ability to retain its cutting edge even at elevated temperatures. It also possesses good toughness, allowing it to withstand high impact and shock loads. Additionally, high-speed steel has excellent heat resistance, allowing it to maintain its strength and hardness at high operating temperatures.
- Q: How does special steel perform in cutting applications?
- Special steel is highly regarded for its exceptional performance in cutting applications. Due to its unique composition and properties, special steel exhibits superior strength, hardness, and wear resistance compared to regular steel. These characteristics make it incredibly effective in withstanding the intense forces and pressures involved in cutting processes. Special steel is known for its ability to maintain its shape and sharpness even under extreme conditions. It has a high level of toughness, ensuring that it can withstand repeated impact and resist deformation or breakage. This durability allows it to maintain its cutting edge for an extended period, resulting in longer tool life and reduced downtime for sharpening or replacing blades. Furthermore, special steel's hardness enables it to effectively cut through tough and abrasive materials such as metals, alloys, and composites. It can withstand the heat generated during cutting, preventing the blade from becoming dull or losing its cutting ability. This heat resistance also reduces the risk of thermal damage to the workpiece, ensuring precise and clean cuts. In addition to its mechanical properties, special steel offers excellent corrosion resistance. This is particularly advantageous in cutting applications that involve exposure to moisture, chemicals, or corrosive environments. The corrosion resistance ensures that the cutting tools made from special steel maintain their performance and longevity, even in challenging conditions. Overall, special steel exhibits exceptional performance in cutting applications due to its superior strength, hardness, wear resistance, and corrosion resistance. Its ability to maintain a sharp cutting edge, withstand high pressures and temperatures, and resist corrosion makes it a preferred choice in various industries, including manufacturing, construction, automotive, and aerospace.
- Q: What is the cost of special steel compared to regular steel?
- The cost of special steel is typically higher than that of regular steel due to its unique properties and manufacturing processes.
- Q: What are the different methods of hardening special steel?
- There exist various techniques for strengthening special steel, each possessing its own merits and suitable applications. 1. Quenching: A widely employed approach for steel hardening, it entails heating the steel to a critical temperature and rapidly cooling it in a quenching medium such as oil, water, or air. This rapid cooling prompts the formation of a martensitic structure, rendering the steel harder but more brittle compared to its original state. 2. Tempering: Following quenching, steel is often subjected to tempering to decrease brittleness and enhance toughness. This process involves reheating the hardened steel to a specific temperature and maintaining it at that temperature for a predetermined duration. By doing so, internal stresses are reduced, and the overall mechanical properties of the steel are improved. 3. Case hardening: Employed to augment the hardness of the outer layer of steel while preserving a tough and ductile core, case hardening involves introducing carbon or nitrogen into the steel's surface through methods like carburizing or nitriding. This results in the creation of a hardened surface layer while retaining the desired properties within the core. 4. Induction hardening: Particularly useful for localized hardening of specific regions within a component, this technique employs an electromagnetic field to solely heat the desired area of the steel, followed by rapid quenching. Induction hardening allows precise control over the hardened region while maintaining desired properties in the remainder of the component. 5. Cryogenic treatment: Involving subjecting hardened steel to extremely low temperatures, often below -150°C (-238°F), this process further refines the steel's microstructure, enhancing its hardness, wear resistance, and dimensional stability. 6. Flame hardening: This method entails heating the steel's surface using a high-temperature flame and subsequently quenching it. Flame hardening is typically employed for large components or specific areas requiring localized hardening. Selecting the appropriate method is crucial and dependent on the steel's specific requirements and intended application. Factors such as desired hardness, toughness, wear resistance, and dimensional stability play a pivotal role in method selection.
- Q: Is special steel suitable for marine applications?
- Marine applications necessitate materials capable of enduring high levels of moisture, exposure to saltwater, and environmental factors such as temperature fluctuations and the impact of waves. Special steel, also known as marine grade stainless steel, is specifically engineered to withstand the challenging conditions prevalent in marine environments. Its exceptional resistance to corrosion, particularly in the presence of saltwater, renders it highly appropriate for diverse marine applications. Distinguished by a greater proportion of chromium and nickel compared to standard steel grades, special steel augments its corrosion resistance properties. Furthermore, it is frequently alloyed with molybdenum, titanium, or other elements to further enhance its resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. Shipbuilding, offshore oil and gas platforms, marine equipment and machinery, marine pipelines, as well as marine architecture and structures are among the common marine applications that derive benefits from special steel. Additionally, special steel is employed in the construction of naval vessels, submarines, and offshore wind farms. To summarize, special steel is exceptionally well-suited to marine applications due to its exceptional resistance to corrosion, durability, and strength. It effectively withstands the rigorous conditions present in marine environments, ensuring the longevity and dependability of marine structures and equipment.
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Special Steel AISI 4140 Round Bar Steel
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 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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