20Cr Alloy Steel Bar Forged or Hot Rolled
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
You Might Also Like
Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
20Cr Alloy Steel Bar Forged or Hot Rolled
Product Description:
Grade: ASTM 1020 / 20Cr
State:hot forging+normalizing+turning
Size:90mm to 1500mm
Length:4 to 6 meter or according to request
Billet:EAF+LF+VD
Straightness:≤4mm/m(black), ≤2mm/m(turning)
OD Tolerance:-0/+8mm(black),-0/+3 mm(turning)
Grain Fineness:ASTM E112-96 > Level 5 or better under annealing state;
Non Metallic Inclusion:ASTM E45 A/B/C/D heavy ≤2, thin ≤2.5
Test:SEP1921 CLASS C/C,D/d,E/e;GB/T 6402-91;GB/T6402-2008/ASTM A388/ASTM A709
MTC:EN 10204-3.1/EN10204-3.2 RONA/BV/SGS Certificate
Lead Time:30 to 60 days after order confirmed
Chemical composition:
Grade | C | Cr | Mn | Si | P | S | Ni | Cu | Mo |
≤ | |||||||||
20Cr | 0.18-0.24 | 0.70-1.00 | 0.50-0.80 | 0.17-0.37 | 0.035 | 0.035 | 0.30 | 0.30 | 0.15 |
Features and Use scope:
It has higer intensity and hardenability than 15Cr,worse toughness ,better weldability ,after welding it don't need to heat treatment.It used to making the parts which have special request in intensity of core and the larger-size appearance can bear abrasion ,or cementite parts of complex shape and seldom burthen ,such as gear , gear shaft ,cam, gudgeon pin ,worm and so on ,it also used to making tempering parts of big speed and can bear middle impact load.
Product Show:
- Q: What are the different surface modification techniques used for special steel?
- Some of the different surface modification techniques used for special steel include heat treatment, electroplating, coatings, and nitriding. These techniques are utilized to enhance the steel's hardness, corrosion resistance, wear resistance, and overall performance in various applications.
- Q: How does cryogenic treatment affect the toughness of special steel?
- The toughness of special steel is greatly affected by cryogenic treatment, which involves subjecting the steel to extremely low temperatures for an extended period. This process has the ability to transform the microstructure of the steel, resulting in improved mechanical properties, including increased toughness. Throughout cryogenic treatment, the steel goes through a process known as martensitic transformation, in which the carbon atoms within the steel lattice rearrange themselves. This transformation leads to the development of additional carbides, which strengthen the steel and enhance its toughness. These carbides act as barriers, hindering crack propagation and improving the steel's resistance to fracture. Additionally, cryogenic treatment reduces the presence of retained austenite, which is a metastable phase in steel that can have detrimental effects on its mechanical properties. The transformation of retained austenite into martensite during cryogenic treatment further enhances the toughness of the steel. The increased toughness achieved through cryogenic treatment makes special steel suitable for various applications that require high strength and resistance to fracture. It improves the steel's ability to endure heavy loads, impacts, and harsh environments. Moreover, cryogenic treatment can enhance the wear resistance and dimensional stability of special steel. It is important to acknowledge that cryogenic treatment alone is not a complete solution for optimizing the toughness of special steel. Other factors, such as the initial composition and heat treatment of the steel, also play a vital role in determining its overall mechanical properties. Therefore, cryogenic treatment should be considered as a complementary process in order to optimize the toughness of special steel.
- Q: What are the different special steel products available in the market?
- In the market, one can find a wide range of special steel products that are specifically designed to meet various industrial needs. Some commonly used special steel products include: 1. Stainless Steel: This particular steel alloy is highly resistant to corrosion due to its minimum chromium content of 10.5%. It finds extensive use in applications that demand exceptional corrosion resistance, such as kitchen utensils, medical instruments, and chemical processing equipment. 2. Tool Steel: Tool steel is a type of carbon and alloy steel that is exclusively manufactured for tool production. It is renowned for its high hardness, resistance to abrasion, and ability to maintain sharp edges. Tool steel is widely employed in the fabrication of cutting tools, dies, and molds. 3. Alloy Steel: Alloy steel is a type of steel that has been blended with other elements like manganese, silicon, nickel, or chromium to enhance its mechanical properties. It offers superior strength, toughness, and wear resistance compared to carbon steel. Alloy steel is used in various applications, including automotive components, construction equipment, and machinery parts. 4. High-Speed Steel: High-speed steel is a variant of tool steel that exhibits the ability to cut at high speeds without compromising its hardness or its ability to retain sharp edges. It is commonly utilized in the production of drills, milling cutters, and saw blades. 5. Spring Steel: Spring steel is a low-alloy, medium or high carbon steel that possesses remarkable shape retention and elasticity even under high stress or repeated loadings. It finds extensive use in the manufacturing of springs, suspension systems, and shock absorbers. 6. Electrical Steel: Electrical steel, also known as silicon steel, is an exceptional steel alloy that demonstrates low electrical losses and high magnetic permeability. It is employed in the fabrication of electrical transformers, motors, and generators. 7. Heat-Resistant Steel: Heat-resistant steel is specifically engineered to withstand high temperatures without compromising its mechanical properties. It is commonly utilized in applications such as furnaces, heat exchangers, and gas turbines. These examples merely scratch the surface of the wide array of special steel products available in the market. The selection of a particular steel product depends on the specific requirements of the application, including factors like corrosion resistance, strength, hardness, and heat resistance.
- Q: How does special steel contribute to the energy equipment industry?
- Special steel plays a crucial role in the energy equipment industry by providing the necessary strength, durability, and resistance to extreme conditions. The energy equipment industry encompasses various sectors such as oil and gas, renewable energy, power generation, and transmission, all of which rely heavily on special steel for their infrastructure and machinery. In the oil and gas sector, special steel is used in the construction of pipelines, drilling equipment, and storage tanks. The unique properties of special steel, such as high tensile strength, corrosion resistance, and the ability to withstand high pressure and temperature, make it an ideal material for these applications. Special steel also ensures the safety and reliability of oil and gas operations, as it can withstand harsh environments, including corrosive substances and extreme weather conditions. In the renewable energy sector, special steel is used in the manufacturing of wind turbines, solar panels, and hydroelectric power systems. These energy sources require strong and lightweight materials that can withstand constant exposure to nature's elements. Special steel alloys, such as high-strength low-alloy (HSLA) steel and stainless steel, are commonly used to construct the infrastructure of renewable energy systems, ensuring their longevity and efficiency. Furthermore, special steel is essential in power generation and transmission equipment. It is utilized in the manufacturing of gas turbines, steam turbines, and generators. Special steel alloys can endure the high temperatures and pressures generated during power generation processes, ensuring the efficiency and reliability of energy production. Additionally, special steel is used in the transmission infrastructure, including transmission towers and power cables, to support the efficient and safe transfer of electricity over long distances. Overall, special steel contributes significantly to the energy equipment industry by providing the necessary strength, durability, and resistance to extreme conditions. It enables the construction of reliable and efficient infrastructure, ensuring the smooth operation of energy systems, whether in oil and gas, renewable energy, or power generation and transmission.
- Q: What are the different coating techniques used for special steel?
- There are several different coating techniques used for special steel, including electroplating, hot-dip galvanizing, powder coating, and thermal spray coating. Each technique has its own advantages and uses, depending on the desired outcome and the specific properties of the special steel being coated.
- Q: What are the applications of special steel in the electronics industry?
- Special steel is widely used in the electronics industry due to its unique properties and benefits. Some of the applications of special steel in this industry include the manufacturing of electronic components, such as connectors, springs, and contacts, which require high strength and corrosion resistance. Special steel is also used in the production of magnetic cores for transformers and inductors, as it exhibits excellent magnetic properties. Additionally, special steel is utilized in the fabrication of precision tools and equipment used in electronics manufacturing processes, ensuring high precision, durability, and reliability. Overall, the applications of special steel in the electronics industry contribute to enhanced performance, efficiency, and longevity of electronic devices and systems.
- Q: How is special steel stored and transported?
- Special steel is typically stored and transported in a controlled environment to ensure its quality and prevent any damage or contamination. It is stored in covered warehouses or facilities equipped with proper ventilation, humidity control, and temperature regulation. Additionally, special steel is often stored on racks or shelves to prevent direct contact with the ground and minimize the risk of corrosion. When it comes to transportation, special steel is usually transported in specially designed containers or crates, ensuring protection from external elements and providing secure handling during transit.
- 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: How does special steel perform in terms of high-temperature strength?
- Special steel is known for its exceptional high-temperature strength. It exhibits excellent resistance to deformation, creep, and thermal fatigue, allowing it to maintain its structural integrity and mechanical properties even under extreme heat conditions. This makes special steel a reliable choice for applications that require resistance to high temperatures, such as in aerospace, power generation, and industrial furnaces.
- 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.
Send your message to us
20Cr Alloy Steel Bar Forged or Hot Rolled
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 50000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
Similar products
Hot products
Hot Searches
Related keywords
