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
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Item specifice
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 specific requirements for special steel used in the food processing industry?
- The specific requirements for special steel used in the food processing industry include being resistant to corrosion, easy to clean and sanitize, non-reactive with food products, and compliant with food safety regulations. It should also have high strength and durability to withstand heavy usage and frequent cleaning.
- Q:How is special steel used in the food processing industry?
- Special steel is commonly used in the food processing industry due to its unique properties such as corrosion resistance and high strength. It is used to manufacture various equipment and components such as knives, blades, cutting tools, mixing machines, and conveyor belts. These specialized steel products ensure food safety, improve processing efficiency, and maintain high hygiene standards in the industry.
- Q:How does special steel contribute to the construction equipment industry?
- Special steel contributes to the construction equipment industry by providing high strength, durability, and resistance to wear and tear. This type of steel is specifically designed to withstand harsh working conditions, such as heavy loads, extreme temperatures, and abrasive materials. Special steel components, such as gears, bearings, and cutting edges, improve the performance and lifespan of construction equipment, enabling them to operate efficiently and reliably. Additionally, special steel alloys offer flexibility in design and manufacturing, allowing for the production of lighter and more fuel-efficient machines, ultimately contributing to increased productivity and cost-effectiveness in the construction industry.
- Q:What are the specific requirements for special steel used in the railway track industry?
- The specific requirements for special steel used in the railway track industry are designed to ensure the safety, durability, and efficiency of the tracks. Firstly, the steel used for railway tracks must have a high tensile strength to withstand the heavy loads and constant stress applied by trains. This strength allows the tracks to maintain their shape and prevent deformation, ensuring smooth and stable movement of the trains. Secondly, the special steel used in railway tracks must have excellent wear resistance. As trains constantly traverse the tracks, there is significant friction and wear between the train wheels and the tracks. Therefore, the steel needs to be able to withstand this wear and tear, minimizing the need for frequent maintenance and replacement. Thirdly, the steel used in railway tracks must have good fatigue resistance. Trains exert repetitive loads on the tracks, which can lead to fatigue failure if the steel is not able to withstand this cyclic loading. Fatigue resistance ensures that the tracks remain intact and safe for prolonged periods, reducing the risk of accidents. Furthermore, the steel must have high corrosion resistance to withstand exposure to various environmental and weather conditions. Railway tracks are exposed to moisture, temperature variations, and other corrosive elements, making it crucial for the steel to have the ability to resist rust and corrosion. In addition to these mechanical and physical properties, the steel used in the railway track industry must also meet specific dimensional and geometric requirements. This includes precise dimensions, straightness, and alignment to ensure proper installation and alignment of the tracks, allowing for smooth and safe train operations. Overall, the specific requirements for special steel used in the railway track industry revolve around strength, wear resistance, fatigue resistance, corrosion resistance, and dimensional accuracy. Meeting these requirements is essential to ensure the safety, longevity, and efficiency of railway tracks, facilitating smooth and reliable train transportation.
- Q:What are the different surface treatment techniques for special steel?
- There are several different surface treatment techniques for special steel, including: 1. Electroplating: This technique involves the deposition of a thin layer of metal onto the surface of the steel through an electrochemical process. It helps enhance corrosion resistance, improve appearance, and provide a protective coating. 2. Nitriding: Nitriding involves the diffusion of nitrogen into the surface of the steel, resulting in a hardened and wear-resistant layer. This technique improves the material's strength, toughness, and resistance to fatigue. 3. Carburizing: Carburizing is a heat treatment process that introduces carbon into the steel surface, creating a hard and wear-resistant layer. It enhances the material's strength, hardness, and resistance to wear. 4. Coating: Various coating techniques, such as thermal spraying, chemical vapor deposition, and physical vapor deposition, can be employed to apply a protective layer onto the steel surface. These coatings can offer improved corrosion resistance, wear resistance, and thermal stability. 5. Shot peening: Shot peening involves bombarding the steel surface with small metal or ceramic particles, which induce compressive stresses and improve fatigue resistance. It also helps to reduce stress corrosion cracking and enhance the material's mechanical properties. These surface treatment techniques play a crucial role in improving the performance, durability, and overall quality of special steel in different industrial applications.
- Q:How does special steel contribute to sustainable construction?
- Special steel contributes to sustainable construction in several ways. Firstly, special steel is highly durable and has a longer lifespan compared to traditional building materials. This means that structures built with special steel require less maintenance and repairs over time, reducing the overall environmental impact. Secondly, special steel is often made from recycled materials, such as scrap metal, which helps to conserve natural resources and reduce waste. The recycling process also requires less energy compared to producing new steel, further reducing the carbon footprint. Additionally, special steel offers high strength-to-weight ratio, allowing for lighter and more efficient construction designs. This leads to reduced material consumption and transportation costs, as well as minimizing the load on the foundation and infrastructure. Lastly, special steel is highly resistant to corrosion and can withstand extreme weather conditions. This resilience ensures the longevity of the structures, reducing the need for replacements and minimizing construction waste. Overall, special steel's durability, recyclability, lightweight nature, and resistance to corrosion contribute significantly to sustainable construction practices by minimizing environmental impact, conserving resources, and promoting long-lasting structures.
- Q:How does special steel resist oxidation?
- The outstanding resistance to oxidation exhibited by special steel is well-known. This is mainly attributed to the inclusion of elements like chromium, nickel, and manganese in its composition. These elements combine to create a passive film, known as a protective layer, on the steel's surface. This film effectively shields the steel from oxygen and moisture. Chromium is the principal element responsible for the oxidation resistance of special steel. It undergoes a reaction with atmospheric oxygen, resulting in the formation of a thin layer of chromium oxide on the steel's surface. This oxide layer is exceptionally stable and prevents any further oxidation of the underlying metal. It acts as a protective shield, hindering the penetration of oxygen and moisture into the steel, which could otherwise lead to corrosion or rusting. Moreover, nickel and manganese also contribute to the oxidation resistance of special steel. They assist in stabilizing the passive film created by chromium oxide and enhance its protective properties. These elements also bolster the steel's ability to withstand high temperatures and corrosive environments. Furthermore, the composition and processing techniques employed in the production of special steel play a vital role in its oxidation resistance. The steel is often subjected to heat treatment processes, such as annealing or quenching, which further enhance its resistance to corrosion. Through meticulous control of alloying elements and precise heat treatment procedures, a robust and long-lasting passive film is formed. In conclusion, special steel's ability to resist oxidation is primarily due to the presence of chromium, nickel, and manganese, which collaborate to create a protective layer on its surface. This passive film acts as a barrier against oxygen and moisture, effectively preventing corrosion and rusting. Additionally, the composition and processing techniques utilized during production significantly contribute to the exceptional oxidation resistance of special steel.
- Q:Can special steel be used for making medical equipment?
- Yes, special steel can be used for making medical equipment. Special steel alloys, such as stainless steel, are commonly used in the manufacturing of medical equipment due to their high strength, durability, and corrosion resistance properties. These materials are essential for ensuring the safety and reliability of medical instruments and devices used in various healthcare settings.
- Q:How does special steel contribute to the construction of infrastructure projects?
- Enhanced strength, durability, and versatility are crucial attributes of special steel that play a vital role in the construction of infrastructure projects. Specifically tailored to meet the unique demands and challenges posed by these projects, special steel is an indispensable component for their successful completion. One of the ways in which special steel contributes to infrastructure projects is through its exceptional strength. Bridges, tunnels, and high-rise buildings, among others, require materials that can endure heavy loads and harsh environmental conditions. Special steel possesses high tensile and yield strength, enabling it to bear significant loads without experiencing deformation or failure. This strength ensures the structural integrity and safety of the infrastructure, providing reassurance to engineers, architects, and the general public. Durability is another key aspect that special steel brings to infrastructure projects. These projects often face exposure to various environmental factors, including extreme temperatures, moisture, and corrosive elements. Special steel is specifically designed to resist corrosion, oxidation, and degradation, making it highly durable and capable of withstanding challenging conditions. Its long lifespan reduces maintenance and replacement costs, making it a cost-effective choice for infrastructure projects. Versatility is yet another advantage of special steel in the realm of infrastructure construction. It can be customized and fabricated into different shapes and sizes to match the specific requirements of diverse projects. Whether used for beams, columns, or reinforcements, special steel offers flexibility in design and construction. This adaptability empowers engineers and architects to create innovative and efficient infrastructure designs, optimizing space and resources. Moreover, special steel contributes to the sustainability of infrastructure projects. Its recyclability and eco-friendly nature make it an environmentally responsible choice. Steel can be recycled without compromising its properties, reducing the need for new raw materials and minimizing waste. This sustainable approach aligns with the growing emphasis on eco-friendly construction practices, positioning special steel as an ideal material for infrastructure projects. In conclusion, through its superior strength, durability, versatility, and sustainability, special steel significantly contributes to the construction of infrastructure projects. Its ability to withstand heavy loads, harsh environmental conditions, and provide long-lasting performance ensures the safety and reliability of infrastructure. Additionally, its flexibility in design and construction allows for innovative and efficient project execution. With these advantages, special steel remains an essential component in the development of robust and sustainable infrastructure.
- Q:What are the main characteristics of wear-resistant steel?
- Wear-resistant steel, also known as abrasion-resistant steel, possesses unique characteristics that make it highly resistant to wear and tear. The main characteristics of wear-resistant steel include: 1. High hardness: Wear-resistant steel is typically hardened to a high level, which provides it with excellent resistance against abrasion, impact, and sliding wear. This hardness is achieved through processes such as quenching and tempering, resulting in a steel material that can withstand heavy loads and abrasive environments. 2. Exceptional toughness: In addition to high hardness, wear-resistant steel also exhibits exceptional toughness. This means that it can absorb impact and withstand heavy shocks without fracturing or breaking. This characteristic is crucial in applications where both abrasion and impact resistance are required, such as in mining equipment and earthmoving machinery. 3. Superior strength: Wear-resistant steel is known for its high strength, enabling it to withstand extreme forces and pressures. This strength is achieved through the use of alloys and heat treatment processes, resulting in a steel material that can withstand heavy loads and resist deformation even under intense wear conditions. 4. Excellent weldability: Wear-resistant steel is often designed with good weldability, allowing it to be easily joined or repaired using various welding techniques. This characteristic is significant as it allows for the fabrication of wear-resistant components and the repair of worn-out parts in a cost-effective manner. 5. Corrosion resistance: Some wear-resistant steel grades are also formulated to exhibit corrosion resistance properties. This feature ensures that the steel remains intact and does not deteriorate when exposed to harsh environments, chemicals, or moisture. This characteristic is particularly useful in applications where wear and corrosion occur simultaneously, such as in marine equipment or mining operations. 6. Extended service life: Due to its high hardness, exceptional toughness, superior strength, and corrosion resistance, wear-resistant steel offers an extended service life compared to other types of steel. Its ability to withstand wear, impact, and abrasion allows for reduced downtime and maintenance costs, making it highly desirable in various industries, including mining, construction, and manufacturing. Overall, the main characteristics of wear-resistant steel make it a reliable and durable material for applications where prolonged exposure to abrasive conditions is expected. Its unique properties ensure that it can withstand heavy loads, resist wear and tear, and maintain its integrity, ultimately leading to improved equipment performance and cost savings.
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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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