Special Steel Round Bar AISI 4140 Alloy Steel

Special Steel Round Bar AISI 4140 Alloy Steel System 1

Special Steel Round Bar AISI 4140 Alloy 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

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

Special Steel Round Bar AISI 4140 Alloy Steel

1.4140/1.7225/42CrMo4/SCM440/EN19
2.good price and fast delivery time
3.large stocks

‍Equivalent grades

GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

Chemical Composition

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

Available size

Round steel bar 10-800mm
Flat steel bar 25-400mm*200-800mm

Surface condition

Black surface/ Grinded/ Machined

Black surface/ Grinded/ Machined

Hardness

Annealed HBS 217 max

Annealed HBS 217 max

Characteristics

4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability.

4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability.

Applications

4140 Alloy Steel/SAE 4140 Steel Price is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering .

4140 Alloy Steel/SAE 4140 Steel Price is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering .

Heat treatment

Forging		Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc.
Annealing		Heat to 830°C-850°C.Cool in furnace.
Normalising		Heat to 870°C-900°C.Cool in still air.
Stress Relieving		Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air.
Hardening		Heat to 830°C-880°C. Quench in oil or polymer.
Tempering		Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided.

Product show：

.jpg

Workshop show：

Special Steel Round Bar AISI 4140 Alloy Steel

FAQ:

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

5, 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: How does special steel perform in abrasive wear conditions?: Special steel is specifically designed to perform exceptionally well in abrasive wear conditions. Its unique composition and manufacturing process make it highly resistant to the detrimental effects of abrasion. The presence of alloying elements such as chromium, manganese, and molybdenum in special steel significantly enhances its hardness and toughness. These elements help to form carbides within the steel matrix, which act as barriers against abrasion. The carbides effectively resist the forces exerted by abrasive particles, preventing them from causing significant damage to the steel surface. Furthermore, special steel undergoes specialized heat treatment processes such as quenching and tempering, which further enhance its resistance to abrasive wear. These processes not only increase the hardness of the steel but also improve its overall toughness and durability. As a result, special steel is capable of withstanding high levels of abrasion without experiencing significant wear or deterioration. In addition to its exceptional mechanical properties, special steel also exhibits excellent corrosion resistance. This is achieved through the addition of elements such as chromium, which forms a protective oxide layer on the steel surface. This oxide layer acts as a barrier, preventing corrosive substances from reaching the underlying steel and causing further damage. Overall, special steel performs exceptionally well in abrasive wear conditions. Its unique composition, heat treatment processes, and corrosion resistance properties make it an ideal material for applications where abrasion is a major concern. Whether in mining, manufacturing, or other industries where abrasive wear is prevalent, special steel can provide superior performance and extended lifespan, ensuring optimal efficiency and cost-effectiveness.

Q: How are tungsten alloys used in the defense industry?: Tungsten alloys are commonly used in the defense industry due to their exceptional properties such as high density, strength, and resistance to heat and corrosion. These alloys are used in various applications including armor piercing ammunition, kinetic energy penetrators, and armor plating for military vehicles and aircraft. Their ability to withstand extreme conditions and penetrate hardened targets make tungsten alloys vital for enhancing the effectiveness and protection capabilities of defense systems.

Q: What are the different types of welding techniques used for special steel?: Special steel can be welded using various techniques depending on its specific requirements and properties. Some commonly used techniques for welding special steel include: 1. Stick welding, also known as Shielded Metal Arc Welding (SMAW), involves using a consumable electrode coated in flux to create an electric arc between the electrode and the base metal. This technique is ideal for thicker sections of special steel due to its ability to generate high heat and deep penetration. 2. Gas Metal Arc Welding (GMAW), also known as MIG welding, utilizes a continuously fed wire electrode and a shielding gas to protect the weld from atmospheric contamination. Its versatility and ability to produce high-quality welds with good control make it widely used for special steel. 3. Gas Tungsten Arc Welding (GTAW), also known as TIG welding, employs a non-consumable tungsten electrode and a shielding gas to create an electric arc. This technique is often preferred for special steel alloys that require precise control over the welding process and where weld quality and appearance are crucial. 4. Flux-Cored Arc Welding (FCAW), similar to GMAW, employs a continuously fed tubular electrode filled with flux. This technique is commonly used for special steel applications that necessitate high deposition rates and deep penetration, such as heavy fabrication or structural welding. 5. Submerged Arc Welding (SAW) involves creating an arc between a continuously fed bare electrode and the workpiece, while a layer of granular flux covers the arc. This technique is typically used for heavy-duty applications and thick materials, providing excellent weld quality and high deposition rates. 6. Laser Beam Welding (LBW) utilizes a highly focused laser beam to melt and join special steel parts. It offers precise control, high welding speeds, and minimal distortion, making it suitable for specialized applications that require high precision and minimal heat-affected zones. It is crucial to consider factors such as material composition, thickness, joint configuration, and desired weld properties when selecting the appropriate welding technique for special steel. Expertise and knowledge are essential to determine the best technique for a specific application, ensuring optimal results in terms of weld quality, strength, and durability.

Q: What are the different chemical resistance grades of special steel?: The different chemical resistance grades of special steel include austenitic stainless steel, duplex stainless steel, super duplex stainless steel, and high-alloy stainless steel.

Q: Can special steel be used in the telecommunications equipment manufacturing industry?: Yes, special steel can be used in the telecommunications equipment manufacturing industry. Special steel is known for its high strength, durability, and corrosion resistance, which are important factors for the telecommunications industry. It can be used in the manufacturing of various components such as antennas, transmitters, receivers, and cables, ensuring reliable and efficient communication networks.

Q: How does special steel contribute to the automotive noise reduction?: Special steel contributes to automotive noise reduction in several ways. Firstly, it is durable and strong, allowing for the construction of thinner and lighter components. This reduces the overall weight of the vehicle, resulting in reduced road and engine noise. Additionally, special steel has excellent vibration-damping properties, which helps absorb and minimize noise generated by the engine, suspension, and other moving parts. The use of special steel in the design of automotive structures and panels also helps reduce noise transmission from the outside environment into the cabin, providing a quieter and more comfortable driving experience for passengers.

Q: How does special steel ensure dimensional stability?: Dimensional stability is guaranteed by special steel through a variety of mechanisms. To begin with, special steel possesses exceptional strength and toughness, enabling it to withstand external forces and prevent deformation. This characteristic is of utmost importance in applications where precise dimensional accuracy is critical, such as in precision machinery or tooling. Moreover, special steel is subjected to specific heat treatment processes to enhance its dimensional stability. For instance, the common practices of quenching and tempering are employed to augment the steel's hardness and resistance to wear, while simultaneously minimizing the risk of warping or distortion. These treatments also aid in preserving the steel's shape and size over time, even in the face of fluctuating temperature conditions. Additionally, special steel often incorporates alloying elements like chromium, nickel, or molybdenum, which contribute to its corrosion resistance. By preventing oxidation and rusting, these alloying elements assist in maintaining the steel's dimensional stability by averting any deterioration or loss of material due to corrosion. Furthermore, the manufacturing process of special steel adheres to rigorous quality control measures to ensure consistent dimensional accuracy. This encompasses meticulous control of the composition, refining techniques, and casting or forging processes. By maintaining precise tolerances during production, special steel can achieve the requisite dimensional stability demanded by specific applications. In conclusion, special steel secures dimensional stability through its exceptional strength, heat treatment processes, inclusion of alloying elements for corrosion resistance, and stringent quality control during manufacturing. These factors collectively contribute to the preservation of the steel's shape, size, and precision over time.

Q: How is corrosion-resistant stainless tool steel used in the production of food processing equipment?: Corrosion-resistant stainless tool steel is used in the production of food processing equipment due to its ability to resist rust and corrosion caused by exposure to moisture, chemicals, and food acids. This steel is specifically designed to withstand the harsh conditions present in food processing environments, ensuring the equipment remains durable and hygienic. It is commonly used to manufacture blades, cutting tools, and various components of machines that come into direct contact with food. Its corrosion-resistant properties make it a reliable and safe choice for maintaining the quality and integrity of food during processing.

Q: What are the properties of low-alloy steel?: Low-alloy steel possesses several properties that distinguish it from other types of steel. Firstly, it contains a lower percentage of alloying elements compared to other alloy steels. This leads to a reduction in the overall cost and increases the weldability and formability of the steel. Additionally, low-alloy steel exhibits improved strength and toughness, making it suitable for applications requiring high structural integrity. It also offers resistance to corrosion and abrasion, enhancing its durability and longevity. Furthermore, low-alloy steel can be heat-treated to further enhance its mechanical properties, such as hardness and ductility.

Q: How is special steel used in the automotive industry?: Special steel is used in the automotive industry for various applications such as manufacturing engine components, transmission systems, and chassis parts. Its high strength, durability, and resistance to corrosion make it ideal for ensuring the safety, performance, and longevity of vehicles. Additionally, special steel is used in the production of specialized tools and machinery required for automotive manufacturing processes.

Send your message to us

*Email

*TEL

*Quantity

*Unit