42CrMo4 Alloy Structure Steel Round Bar
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- Loading Port:
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- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
42CrMo4 Alloy Structure Steel Round Bar
Product Information:
Heat treatment
Soft Annealing: Heat to 780-810°C, cool slowly. This will produce a maximum Brinell hardness of 240.
Stress Relieving: Stress relieving to remove machining stresses should be carried out by heating to 650°C, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening: Harden from a temperature of 1080-1160°C followed by air, oil or warm bath quenching. Hardness after quenching is 47-53 HRC.
Tempering :Tempering temperature: See the table bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
Specification :
Size:round
Dia:18mm~220mm
Width:60mm-600mm
Heat treatment:Normalized ; Annealed ; Quenched ; tempered
Surface Condition:Black surface ; Grinded ; Machined
Delivery Condition:hot rolled ; cold drawn ; forged
Payment Terms:T/T;L/C
Trade Terms:FOB;CIF
Application:cold work die steel;hot work die steel;plastic die steel
Product Overviews:
| Product Name | Typical Grades | Diameter(mm) | Standard adopted |
| Carbon Steel | 20 (1020/S20C/C22) | Ø16-Ø300 | GB/SAE/JIS/DIN |
| 40 (1040/S40C/C40) | |||
| 45 (1045/S45C/C45) | |||
| Bearing Steel | GCr9 (51100/SUJ1) | Ø12-Ø250 | |
| GCr15 (52100/SUJ2/100Gr6) | |||
| GCr9SiMn (A485-Gr.1/SUJ3) | |||
| Cr-Mo Steel | 20Cr (5120/SCr420H/20Cr4) | Ø12-Ø250 | |
| 40Cr (5140/SCr440/41Cr4) | |||
| 42CrMo(4140/SCM440/42CrMo4) | |||
| Gear Steel | 20CrNiMo | Ø16-Ø600 | |
| 20CrMn(5115/SMnC420/20MnCr5) | |||
| 20CrNiMo(8620/SNCM220/20CrMiMo2) |
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- Q: How is special steel used in the mining industry?
- Special steel is widely used in the mining industry due to its exceptional properties such as high strength, durability, and resistance to wear and corrosion. It is utilized in various applications including the manufacturing of drilling tools, crushing equipment, conveyor systems, and structural components for mining machinery. Additionally, special steel is used in the production of wear-resistant plates and liners, which protect mining equipment from abrasion and extend their lifespan. This type of steel plays a crucial role in enhancing the efficiency and safety of mining operations.
- Q: What are the properties of nickel-based alloys?
- Nickel-based alloys possess a range of desirable properties including high strength, excellent corrosion resistance, good thermal stability, and exceptional resistance to high temperatures and harsh environments. These alloys also exhibit good toughness, ductility, and resistance to cracking, making them ideal for various applications such as aerospace, chemical processing, and marine industries. Additionally, nickel-based alloys can be easily fabricated and offer exceptional resistance to both oxidation and reduction, making them highly versatile and widely used in a multitude of industries.
- Q: What are the main factors affecting the hardness of special steel?
- The main factors affecting the hardness of special steel include the composition of the steel, the heat treatment process, the grain size of the steel, and the presence of impurities or inclusions.
- Q: What are the requirements for special steel used in cryogenic applications?
- Special steel used in cryogenic applications must meet several requirements to ensure its performance and reliability in extreme low-temperature environments. Firstly, the steel should have excellent low-temperature toughness to withstand the extreme cold. This means that it should be able to resist brittle fracture and maintain its mechanical properties even at cryogenic temperatures. The steel should have a high toughness and ductility to absorb impact and prevent cracking. Secondly, the steel must have a low coefficient of thermal expansion. This is important because cryogenic applications involve significant temperature changes, and a high coefficient of thermal expansion can lead to dimensional instability and stress within the material. A low coefficient of thermal expansion helps to minimize these effects and maintain dimensional stability. Thirdly, the steel should have a low thermal conductivity. Cryogenic applications often involve the transfer or storage of extremely cold substances, and a low thermal conductivity helps to prevent heat transfer and maintain the desired temperature. This is particularly important for applications where temperature control is critical, such as in the storage of liquefied gases. Additionally, the steel should have good corrosion resistance. Cryogenic environments can be highly corrosive, and the steel needs to be able to withstand the effects of any corrosive substances that may be present. This is particularly important for applications involving the storage or transportation of cryogenic liquids or gases. Finally, the steel should have good weldability. In many cryogenic applications, welding is required to join different components or sections of the steel. Therefore, the steel must have good weldability to ensure strong and reliable joints. In summary, the requirements for special steel used in cryogenic applications include excellent low-temperature toughness, low coefficient of thermal expansion, low thermal conductivity, good corrosion resistance, and good weldability. Meeting these requirements ensures that the steel can withstand the extreme cold and harsh conditions of cryogenic environments while maintaining its structural integrity and performance.
- Q: What are the different methods for improving the impact resistance of special steel?
- Special steel can be made more impact resistant through various methods. These methods fall into three main categories: heat treatment, alloying, and surface treatments. Heat treatment is a commonly used method to improve impact resistance. It involves carefully heating and cooling the steel to change its microstructure. Tempering and quenching are the two primary heat treatment processes used for this purpose. Tempering involves heating the steel to a specific temperature and then slowly cooling it. This helps to relieve internal stresses and increase toughness. On the other hand, quenching involves rapidly cooling the steel after heating it to a high temperature. This results in a hardened microstructure, which enhances impact resistance. Alloying is another method to enhance the impact resistance of special steel. By adding specific elements to the base steel, its properties can be improved. For instance, elements like manganese, nickel, or chromium can be added to increase toughness and impact resistance. These alloying elements modify the steel's microstructure, resulting in enhanced strength and resistance to deformation. Surface treatments are used to provide a protective layer on the steel's surface, thereby improving impact resistance. A commonly employed surface treatment is case hardening, which introduces carbon or nitrogen into the outer layer of the steel. This creates a hard surface while maintaining a tough core, resulting in improved impact resistance. Another surface treatment method is shot peening, where the steel surface is bombarded with small particles under high pressure. This induces compressive stresses in the surface layer, enhancing fatigue and impact resistance. In summary, the impact resistance of special steel can be improved through different methods, including heat treatment, alloying, and surface treatments. These methods can be applied individually or in combination to enhance the steel's mechanical properties, making it more resistant to impact and deformation.
- Q: How does the hardness of special steel affect its performance?
- The hardness of special steel plays a crucial role in determining its performance. The hardness of steel refers to its ability to resist indentation, scratching, or deformation during use. This property is directly related to the steel's microstructure and the amount of carbon present in it. When special steel is hardened, it undergoes a process called heat treatment, typically involving rapid cooling or quenching after being heated to high temperatures. This process alters the steel's microstructure, resulting in a harder material. The increased hardness provides several benefits to the performance of special steel. Firstly, a higher hardness level enhances the wear resistance of special steel. This is particularly important in applications where the steel is subjected to abrasive or erosive forces, such as cutting tools or machinery components. A harder steel can withstand these forces without significant wear or damage, resulting in improved longevity and reliability. Secondly, the hardness of special steel affects its strength and toughness. A harder steel generally exhibits higher strength, meaning it can withstand greater forces without permanent deformation or failure. This property is advantageous in applications where the steel is subjected to heavy loads or impacts. Additionally, a certain level of toughness is necessary to prevent brittle fractures. While high hardness can make a steel more brittle, careful heat treatment can balance the hardness and toughness, ensuring the steel remains strong and resistant to fracture. Furthermore, the hardness of special steel also affects its machinability. Hardened steel can be more challenging to machine due to its increased resistance to cutting tools. However, it offers greater dimensional stability and precision during machining operations, leading to more accurate and consistent results. In summary, the hardness of special steel significantly impacts its performance. A higher hardness level provides improved wear resistance, strength, and toughness, making it suitable for demanding applications. However, the balance between hardness and toughness needs to be carefully considered to avoid brittleness. Therefore, understanding and controlling the hardness of special steel is essential to optimize its performance in various industries.
- Q: What are the main advantages of using special steel in the power generation industry?
- The main advantages of using special steel in the power generation industry are its exceptional strength, resistance to corrosion and high-temperature capabilities. These properties make special steel highly suitable for critical components like turbines, boilers, and generators, ensuring their durability and reliability in harsh operating conditions. Additionally, special steel's ability to withstand extreme pressure and stress enhances the overall safety and efficiency of power plants.
- Q: How does special steel contribute to the mining aftermarket industry?
- Special steel contributes to the mining aftermarket industry by providing high-strength and durable materials for various mining equipment and machinery. It enhances the performance and longevity of mining components such as drill bits, conveyor belts, crushers, and cutting tools. The use of special steel in these applications improves productivity, reduces downtime, and lowers maintenance costs, thus playing a crucial role in the efficiency and profitability of the mining aftermarket industry.
- Q: How does special steel perform in terms of magnetic properties?
- Special steel can exhibit various magnetic properties depending on its composition and processing. Some types of special steel, such as stainless steel, are known for their low magnetic permeability, making them suitable for applications where magnetism needs to be minimized. On the other hand, certain special steels like electrical steel are specifically designed to have high magnetic permeability, making them ideal for use in transformers and electric motors. Overall, the magnetic properties of special steel can be tailored to meet specific requirements, offering versatility in different applications.
- Q: How does special steel contribute to the manufacturing aftermarket industry?
- Special steel contributes to the manufacturing aftermarket industry by providing high-quality materials that are crucial for producing durable and reliable aftermarket parts and components. Its unique properties, such as increased strength, corrosion resistance, and heat resistance, make it ideal for manufacturing aftermarket products that need to withstand demanding conditions. Additionally, special steel's versatility and ability to be machined into complex shapes allow manufacturers to create customized aftermarket solutions, enhancing performance and extending the lifespan of various industrial machinery and equipment.
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42CrMo4 Alloy Structure Steel Round Bar
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 30 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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