• AISI 4140 ASTM 42CrMo4 Steel Round Bar System 1
  • AISI 4140 ASTM 42CrMo4 Steel Round Bar System 2
  • AISI 4140 ASTM 42CrMo4 Steel Round Bar System 3
AISI 4140 ASTM 42CrMo4 Steel Round Bar

AISI 4140 ASTM 42CrMo4 Steel Round Bar

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
30 m.t.
Supply Capability:
10000 m.t./month

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Specification

Type:
Alloy Steel
Shape:
Steel Round Bar

AISI 4140 ASTM 42CrMo4 Steel Round Bar  

Product Information:

Material: AISI 4140 hot rolled alloy steel bar

Diameter: 10mm-300mm

Length: 3000mm-12000mm Straightness: 3mm/M max

Process: EAF + LF + VD +rolled + Heat Treatment (optional)

Delivery condition: Hot rolled + rough machined (black surface after Q/T) + turned (optional)

Delivery Time: 30-45 days

MOQ: 25 tons

Heat treatment: Normalized / Annealed / Quenched / tempered

Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing

Test: Ultrasonic test according to SEP 1921-84 G3 C/c

Marking: Grade, heat NO, length will be stamped one each bar with required color

Application: Statically and dynamically stressed components for vehicles, engines and machines, parts of larger cross-sections, crankshafts, gears.

Product Overviews:

Product NameTypical GradesDiameter(mm)Standard adopted
Carbon Steel20 (1020/S20C/C22)Ø16-Ø300GB/SAE/JIS/DIN
40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing SteelGCr9 (51100/SUJ1)Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)
Cr-Mo Steel20Cr (5120/SCr420H/20Cr4)Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel20CrNiMoØ16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)

Product Show:

AISI 4140 ASTM 42CrMo4 Steel Round Bar

Our Advantages:

· Industry experience over 20 years.

· Shipment of goods -More than 70 countries worldwide.

· The most convenient transport and prompt delivery.

· Competitive price with best service.

· High technical production line with top quality products.

· High reputation based on best quality products.

 

With our experienced, enthusiastic and dynamic staffs, we assure to bring you the products with best quality, reasonable prices and good after-sales services under the motto: Friends First, Business After.

Communication, Experience, Expertise and Best efforts are our Promises to you.


Q: How is high-temperature tool steel used in the production of hot work tools?
High-temperature tool steel is used in the production of hot work tools due to its exceptional heat resistance and strength properties. It can withstand the high temperatures generated during hot work processes such as forging, extrusion, and die casting, without losing its hardness or experiencing deformation. This steel is used to manufacture tooling components like dies, punches, and inserts, ensuring their longevity and performance in extreme heat conditions.
Q: What are the cost implications of using special steel?
Using special steel can have significant cost implications. Special steels are often more expensive compared to standard steels due to their specific properties and manufacturing processes. The cost of special steel can vary depending on factors such as the alloy composition, production techniques, and market demand. Additionally, using special steel may require specialized tools, equipment, and skilled labor, which can further increase the overall cost. However, it is important to consider the long-term benefits and potential cost savings that can be achieved by using special steel, such as improved durability, corrosion resistance, and enhanced performance in specific applications.
Q: What are the different heat treatment processes for special steel?
Some of the different heat treatment processes for special steel include annealing, quenching and tempering, hardening, case hardening, and precipitation hardening.
Q: What are the different testing methods used for special steel?
There are several testing methods commonly used for special steel, including mechanical testing, non-destructive testing (NDT), and chemical analysis. Mechanical testing involves evaluating the physical properties of the steel, such as tensile strength, hardness, and impact resistance. NDT methods, such as ultrasonic testing, magnetic particle inspection, and radiographic testing, are used to detect defects or flaws in the steel without causing any damage. Chemical analysis involves determining the composition and elemental content of the steel, which is crucial for ensuring its quality and performance. These testing methods are essential in ensuring the reliability and suitability of special steel for various applications.
Q: Can special steel be used in the production of springs for automotive suspension?
Yes, special steel can be used in the production of springs for automotive suspension. Special steel, such as alloy steel or high carbon steel, is often preferred due to its superior strength, durability, and resistance to fatigue. These properties make it well-suited for withstanding the heavy loads and harsh conditions experienced by automotive suspension systems.
Q: How does special steel contribute to the manufacturing of aerospace components?
Special steel plays a vital role in the manufacturing of aerospace components due to its unique properties and characteristics. Its exceptional strength, durability, and resistance to extreme temperatures and corrosion make it an ideal material for various applications in the aerospace industry. One of the main contributions of special steel to aerospace manufacturing is its ability to withstand high stress and pressure. Aerospace components, such as turbine blades, landing gear, and structural supports, are subjected to tremendous forces during flight. Special steel's strength and toughness allow these components to endure these forces without failure, ensuring the safety and reliability of the aircraft. Additionally, special steel's resistance to extreme temperatures is crucial in the aerospace industry. Aircraft engines, for example, operate at extremely high temperatures, and special steel alloys, such as those containing nickel or cobalt, are used to manufacture components like turbine discs and combustion chambers. These alloys can withstand the intense heat and prevent deformation or failure, ensuring optimal engine performance and efficiency. Furthermore, special steel's resistance to corrosion is essential for aerospace applications. Aircraft are constantly exposed to harsh environmental conditions, including moisture, chemicals, and saltwater. Special steel alloys, such as stainless steel, are highly resistant to corrosion, preventing degradation and maintaining the structural integrity of aerospace components over time. This is particularly important for critical parts like fuel tanks, hydraulic systems, and airframe structures. In conclusion, special steel significantly contributes to the manufacturing of aerospace components by providing strength, durability, resistance to extreme temperatures, and corrosion resistance. Its unique properties ensure the safety, reliability, and longevity of aerospace systems, making it an indispensable material in the aerospace industry.
Q: What are the requirements for special steel used in metalworking tools?
The requirements for special steel used in metalworking tools include high hardness, excellent wear resistance, good toughness, and high heat resistance. Additionally, the steel should have good machinability, be able to hold a sharp edge, and have the ability to withstand high temperatures and loads without deforming or breaking.
Q: What is the significance of phosphorus in special steel?
Phosphorus plays a vital role in the production of special steel due to its numerous advantageous properties. To begin with, it acts as a deoxidizer during the steel manufacturing process, thereby eliminating impurities like oxygen. This results in an overall improvement in the quality and purity of the steel, making it more resistant to corrosion and enhancing its mechanical properties. Additionally, phosphorus has the ability to enhance the strength and hardness of the steel, making it ideal for applications that demand durability and resistance to wear. It also aids in improving the steel's machinability, facilitating easier shaping and processing. Moreover, phosphorus contributes to the steel's capacity to retain its strength even at high temperatures, making it suitable for use in environments like power plants or aerospace industries. However, it is crucial to control the concentration of phosphorus within certain limits as excessive levels can have detrimental effects. A high phosphorus content can lead to brittleness, reduced toughness, and decreased weldability of the steel. Therefore, it is necessary to carefully consider and balance the beneficial effects of phosphorus with its potential drawbacks. In conclusion, the significance of phosphorus in special steel lies in its ability to enhance the quality, purity, strength, hardness, machinability, and high-temperature performance of the steel. By controlling the phosphorus content within appropriate limits, manufacturers can produce special steel with improved properties that meet the specific requirements of various industrial applications.
Q: What are the main advantages of using special steel in the automotive racing industry?
The main advantages of using special steel in the automotive racing industry include its high strength-to-weight ratio, superior durability, and improved performance. Special steel alloys offer increased tensile strength and toughness, allowing for lighter and more rigid components, which contribute to higher speeds and improved handling. Additionally, special steel's resistance to wear and fatigue ensures better reliability and longevity of critical parts, reducing the risk of failures and costly repairs.
Q: What are the different methods for joining special steel?
There are several methods available for joining special steel, which is typically used in applications that require high strength, corrosion resistance, or specific mechanical properties. Some of the most common methods for joining special steel include: 1. Welding: This is the most common method used to join special steel. Different types of welding techniques can be employed, such as arc welding (including shielded metal arc welding, gas metal arc welding, and flux-cored arc welding), resistance welding (spot welding, seam welding), and laser welding. Welding requires the use of filler material to bond the steel pieces together, and it can produce strong and durable joints. 2. Brazing: Brazing involves joining special steel using a filler material (typically a brass or bronze alloy) with a lower melting point than the base steel. The filler material is heated until it melts and flows into the joint, creating a strong bond. Brazing is often used for joining dissimilar metals or when the base steel has a high melting point. 3. Soldering: Similar to brazing, soldering also involves using a filler material with a lower melting point to join special steel. However, soldering typically uses a non-ferrous filler material, such as tin-lead or tin-silver alloys. Soldering is commonly used for joining electronic components or delicate parts that cannot withstand high temperatures. 4. Mechanical Fastening: Special steel can also be joined using mechanical fasteners, such as bolts, screws, rivets, or clips. This method is often used when the joint needs to be easily disassembled, or when welding or brazing is not feasible or desirable. 5. Adhesive Bonding: Adhesive bonding involves using a specialized adhesive or glue to join special steel. This method is suitable for joining thin or delicate steel components or when the joint requires high resistance to vibration or shock. Adhesive bonding can provide a strong and durable bond, but it may not be suitable for high-temperature or high-stress applications. It is important to consider the specific requirements of the application, such as strength, corrosion resistance, temperature resistance, and the desired permanence of the joint, when selecting the appropriate method for joining special steel. Each method has its own advantages and limitations, and choosing the right method will ensure a strong and reliable joint.

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