• Aisi 4140  Alloy steel Mould Steel Round Bar System 1
  • Aisi 4140  Alloy steel Mould Steel Round Bar System 2
  • Aisi 4140  Alloy steel Mould Steel Round Bar System 3
  • Aisi 4140  Alloy steel Mould Steel Round Bar System 4
Aisi 4140  Alloy steel Mould Steel Round Bar

Aisi 4140 Alloy steel Mould Steel Round Bar

Ref Price:
$300.00 - 500.00 / m.t. get latest 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,ASTM,JIS,GB,BS,DIN,API,EN
Technique:
Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring
Shape:
U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
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
Net Weight:
as required
Length:
as required
Thickness:
as required

The details of our Steel

1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard

 

2. Produce processes: Smelt Iron -EAF smelt Billet  - ESR smelt Billet -Hot rolled or forged get the  steel round bar and  plate

 

3. Heat treatment:

Normalized / Annealed / Quenched+Tempered

 

4. Quality assurance:

All order we can received  Third party inspection, You can let SGS, BV,.. and others test company test and inspect our products before Goods shipping.


Product information

 

1.Chemical Composition(%)

C                 Si             Mn             P                  S              Cr            Ni              Mo 

0.42            0.30          0.60          ≤0.025         ≤0.025      1.00        ≤ 0.25         0.20


2.Equivalent Grades

Alloy Steel 4140\ DIN 42CrMo4\1.7225\SCM440


3.Heat treatment

 

Normalized / Annealed / Quenched / tempered


4.Delivery condition

 

Hot forged,   black sur face or  Turned (optional) , rough machined(optional)


5.Certification 

ISO9001:2008;SGS Test;Mill Certificate Test


6.Tempering 

Heating to 550 - 650 ° C and maintenance regime, again depending on the mechanical 

Product show

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Workshop show

Aisi 4140  Alloy steel Mould Steel Round Bar

Q:What are the common challenges in machining titanium alloys?
Machining titanium alloys poses several common challenges that need to be addressed in order to achieve successful and efficient results. One of the primary challenges is the material's inherent strength and hardness. Titanium alloys are known for their excellent strength-to-weight ratio, which makes them ideal for various applications. However, this same strength can make them difficult to machine. The high strength of titanium alloys increases the cutting forces required during machining, leading to faster tool wear and decreased tool life. This necessitates the use of robust cutting tools made from materials such as carbide or ceramic, which can withstand the demanding conditions and maintain their cutting performance. Another challenge in machining titanium alloys is their poor thermal conductivity. This characteristic causes heat to build up rapidly during the cutting process, leading to localized high temperatures. These high temperatures can result in thermal damage to both the cutting tool and the workpiece, leading to reduced dimensional accuracy and surface finish. To overcome this challenge, it is crucial to implement effective cooling and lubrication techniques, such as using coolant or high-pressure air, to dissipate the heat and prevent overheating. Furthermore, titanium alloys have a tendency to generate built-up edge (BUE) during machining. BUE is the accumulation of workpiece material on the cutting tool, which can cause poor chip evacuation, increased cutting forces, and surface finish issues. To mitigate BUE formation, it is recommended to use proper cutting speeds and feed rates, as well as employing cutting fluids that aid in chip evacuation and prevent the adhesion of material on the tool. Additionally, titanium alloys are highly reactive with oxygen, resulting in the formation of a tenacious oxide layer on the surface during machining. This oxide layer can cause tool chipping and premature wear. To combat this, it is necessary to employ suitable cutting speeds and feeds that promote efficient material removal while minimizing prolonged exposure to the reactive nature of titanium alloys. Lastly, the low thermal expansion coefficient of titanium alloys can cause workpiece distortion and dimensional inaccuracies. To address this challenge, it is important to ensure proper fixturing and clamping techniques that minimize workpiece movement during machining. In conclusion, the common challenges in machining titanium alloys include high cutting forces, poor thermal conductivity, built-up edge formation, reactive oxide layer, and workpiece distortion. These challenges can be overcome through the use of appropriate cutting tools, effective cooling and lubrication techniques, proper cutting parameters, and careful workpiece handling.
Q:How is precipitation-hardening steel used in the aerospace industry?
Precipitation-hardening steel is extensively used in the aerospace industry due to its exceptional strength-to-weight ratio and high corrosion resistance. It is employed in critical components such as aircraft structures, landing gears, turbine blades, and fasteners. The steel's unique property of being able to strengthen through a precipitation process allows for the manufacturing of lightweight and durable parts, resulting in improved fuel efficiency, enhanced performance, and increased safety in aircraft operations.
Q:How is nitriding steel used in the manufacturing of engine components?
Nitriding steel is commonly used in the manufacturing of engine components due to its ability to improve their hardness, wear resistance, and fatigue strength. By subjecting the steel parts to a controlled nitrogen-rich environment, the process of nitriding forms a hard surface layer on the components, enhancing their durability and reducing the chances of premature failure. This makes nitrided steel components well-suited for use in engine parts such as crankshafts, camshafts, and valves, where high strength and resistance to wear are crucial for optimal performance and longevity.
Q:How does special steel contribute to the flexibility of products?
There are multiple ways in which special steel contributes to the flexibility of products. Firstly, its high strength and durability are well-known, enabling manufacturers to create products that can withstand heavy loads or extreme conditions. This allows for the production of flexible products suitable for various applications, ranging from automotive parts to construction materials. Furthermore, special steel possesses exceptional ductility and malleability, meaning it can be easily shaped, bent, or molded into different forms without compromising its structural integrity. This flexibility in design empowers manufacturers to produce products with intricate details and complex shapes, meeting specific customer demands or industry standards. Moreover, special steel's resistance to corrosion and wear guarantees that products made with this material have a longer lifespan and can endure harsh environments. This enhances the flexibility of products by minimizing the need for frequent replacements or repairs, ultimately saving time and costs for both manufacturers and end-users. Additionally, special steel's ability to maintain its mechanical properties at high temperatures makes it suitable for applications where thermal stability is vital. This enables the production of products that can function reliably in extreme heat or cold conditions, expanding their potential uses in industries such as aerospace, energy, or manufacturing. To summarize, special steel's high strength, ductility, corrosion resistance, and thermal stability all contribute to the flexibility of products. By providing a versatile and dependable material, special steel facilitates the production of products that can adapt to diverse requirements and environments, offering improved performance and longevity.
Q:How does special steel contribute to the oil and gas aftermarket industry?
Special steel plays a crucial role in the oil and gas aftermarket industry due to its unique properties and capabilities. Firstly, special steel is highly resistant to corrosion, making it ideal for use in the harsh and corrosive environments commonly found in the oil and gas sector. This resistance to corrosion ensures that the equipment and components made from special steel have a longer lifespan, reducing the need for frequent replacements and maintenance. Additionally, special steel offers high strength and durability, allowing it to withstand the extreme pressures and temperatures encountered in oil and gas operations. This strength ensures that the equipment and components made from special steel can operate reliably and efficiently, even under demanding conditions. Moreover, special steel can be tailored to meet the specific needs of the oil and gas industry. With its various grades and compositions, special steel can be customized to possess specific properties such as resistance to sulfide stress cracking, hydrogen embrittlement, and high-temperature oxidation. These customized properties make special steel suitable for critical applications such as wellheads, pipelines, valves, and other equipment used in the oil and gas aftermarket industry. Furthermore, special steel enables the production of complex and intricate components that are essential for the oil and gas sector. Its excellent machinability and weldability allow for the creation of precision-engineered parts, ensuring the efficient and reliable operation of oil and gas equipment. In summary, special steel contributes significantly to the oil and gas aftermarket industry by providing corrosion resistance, high strength, durability, customization options, and the ability to manufacture intricate components. These properties make special steel indispensable in ensuring the safety, reliability, and efficiency of operations in the oil and gas sector.
Q:How does special steel contribute to sustainable construction?
Special steel contributes to sustainable construction in several ways. Firstly, it has a significantly longer lifespan compared to other construction materials, reducing the need for frequent repairs or replacements. This leads to reduced resource consumption and waste generation. Additionally, special steel is highly durable and resistant to corrosion, making it an ideal choice for structures in harsh environments, such as bridges or offshore wind farms. This longevity and resilience reduce the environmental impact associated with the maintenance and replacement of infrastructure. Furthermore, special steel can be recycled and reused multiple times without losing its properties, reducing the demand for virgin materials and minimizing the carbon footprint of construction projects. Overall, the use of special steel in construction helps promote sustainability by increasing the lifespan of structures, reducing resource consumption, and minimizing waste generation.
Q:What are the main characteristics of high-speed steel?
High-speed steel is known for its exceptional hardness, toughness, and heat resistance. It can maintain its hardness even at high temperatures, making it ideal for cutting tools and machining applications. Additionally, high-speed steel has excellent wear resistance, allowing it to withstand heavy usage and prolong tool life. It also has good machinability and can be easily shaped into various cutting tools.
Q:What are the common applications of special steel?
Special steel, also known as alloy steel, finds wide usage across various industries owing to its distinct properties and advantages. Some prevalent applications of special steel are as follows: 1. Automotive industry: In the automotive sector, special steel is extensively employed for the production of engine components such as crankshafts, camshafts, connecting rods, and valves. Its exceptional strength, durability, and resistance to wear render it ideal for enduring the rigorous conditions within internal combustion engines. 2. Aerospace industry: The aerospace industry heavily relies on special steel for manufacturing critical components like landing gear, turbine blades, and structural parts. Its remarkable strength-to-weight ratio, excellent heat resistance, and ability to withstand extreme conditions are indispensable in ensuring the safety and reliability of aircraft. 3. Energy industry: The energy sector, particularly power generation, heavily depends on special steel. It is used in the manufacturing of turbine blades, steam pipes, pressure vessels, and other power plant components. Its capacity to endure high temperatures, pressure, and corrosive environments makes it suitable for these demanding applications. 4. Oil and gas industry: Within the oil and gas sector, special steel is extensively utilized in the production of pipes, valves, fittings, and drilling equipment. Its corrosion resistance and high strength guarantee the secure transportation and extraction of oil and gas in harsh environments. 5. Construction industry: Special steel is commonly employed in the construction sector for various purposes. It is used in the manufacturing of reinforcement bars, structural components, and fasteners. Its high tensile strength, durability, and resistance to corrosion make it an ideal choice for withstanding the loads and environmental conditions encountered in construction projects. 6. Tool and die making: Special steel is widely employed in the production of tools and dies. Its high hardness, wear resistance, and toughness make it suitable for manufacturing cutting tools, molds, dies, and other precision components used across various industries. 7. Medical industry: In the medical sector, special steel is used for the production of surgical instruments, implants, and medical devices. Its biocompatibility, corrosion resistance, and sterilization capabilities make it suitable for these critical applications. In conclusion, special steel finds extensive applications in the automotive, aerospace, energy, oil and gas, construction, tool and die making, and medical industries due to its unique properties and ability to withstand demanding conditions.
Q:How does electrical steel contribute to the production of transformers and motors?
Electrical steel, also known as silicon steel, plays a crucial role in the production of transformers and motors. Its unique magnetic properties, such as high permeability and low core loss, allow for efficient energy transfer and reduced power losses. This material is specifically designed to enhance magnetic induction and minimize eddy currents, ensuring optimal performance in electrical machines. By using electrical steel in the core of transformers and motors, manufacturers can increase energy efficiency, improve power transmission, and reduce overall operational costs.
Q:How is special steel made?
Special steel undergoes a complex and precise manufacturing process, consisting of various steps. Initially, high-quality raw materials like iron ore and scrap metal are carefully chosen and then melted in a furnace at extremely high temperatures. This procedure eliminates impurities and forms molten steel. Once the molten steel is obtained, it is further refined to achieve the desired composition and properties. This is accomplished by adding various alloying elements like chromium, nickel, manganese, and vanadium. These elements enhance the steel's strength, hardness, corrosion resistance, and other specific characteristics necessary for the intended application. Following that, the molten steel is cast into different shapes, such as bars, slabs, or billets, using a process called casting. During casting, the steel is poured into molds and allowed to cool and solidify. The resulting solidified steel is then processed further using techniques like rolling, forging, or extrusion to achieve the desired shape and dimensions. After shaping, the steel undergoes heat treatment, which involves controlled heating and cooling processes. Heat treatment refines the steel's microstructure, improving its mechanical properties. This can involve processes like quenching, tempering, annealing, or normalizing, depending on specific requirements. Finally, the steel is subjected to thorough testing and quality control measures to ensure compliance with required specifications and standards. These tests encompass mechanical, chemical, and physical analyses, as well as non-destructive testing techniques, to verify the integrity and performance of the special steel. In summary, the production of special steel is a highly technical and specialized process that entails meticulous selection of raw materials, precise alloying, casting, shaping, heat treatment, and rigorous quality control. The end result is a steel with exceptional properties that can be tailored to meet the specific needs of diverse industries, including automotive, aerospace, construction, or manufacturing.

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