20Cr Alloy Steel Bar Forged or Hot Rolled

20Cr Alloy Steel Bar Forged or Hot Rolled

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 50000 m.t./month

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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:

20Cr Alloy Steel Bar Forged or Hot Rolled

Q: What are the different forming processes for special steel?: There are several different forming processes for special steel, including forging, casting, extrusion, and rolling.

Q: How does special steel contribute to the electronics industry?: Special steel plays a crucial role in the electronics industry by providing key components and materials that are essential for the manufacturing and performance of electronic devices. It is used in the production of various electronic components including connectors, circuit boards, sensors, and power transmission components, due to its exceptional properties such as high strength, excellent corrosion resistance, and thermal conductivity. Special steel also enables the miniaturization and increased efficiency of electronic devices, enhancing their overall performance and durability.

Q: How does special steel contribute to the agriculture industry?: The agriculture industry heavily relies on special steel to ensure durable and high-performance materials for agricultural machinery and equipment. These steels are specifically designed to withstand the harsh conditions and heavy workloads found in farming operations, resulting in increased efficiency and productivity. Special steel plays a crucial role in agriculture, particularly in the manufacturing of tillage equipment like plows, cultivators, and harrows. These implements require robust materials that can withstand the abrasion and impact of soil and rocks. Special steel provides the necessary strength and hardness to effectively break up the soil, improve soil quality, and prepare the land for planting. Moreover, special steel is extensively used in the production of machinery for planting, harvesting, and processing agricultural products. Combine harvesters, for example, heavily rely on special steel components for their cutting systems, threshing mechanisms, and grain handling systems. By utilizing special steel, these machines can efficiently handle the demanding tasks of crop collection, separation, and storage. Furthermore, special steel enhances the longevity and reliability of agricultural equipment. Agricultural machinery operates in challenging environments exposed to corrosive elements, moisture, and extreme temperatures. Special steel, often coated with protective layers, offers resistance against corrosion, rust, and wear, ultimately extending the lifespan of agricultural equipment. Additionally, the use of special steel in machinery manufacturing leads to improved precision and accuracy in agricultural operations. Precision agriculture, which involves using advanced technologies to optimize productivity, reduce waste, and conserve resources, increasingly relies on special steel components. These components enable more precise movements, better control, and increased accuracy in machinery, resulting in improved efficiency and waste reduction. In conclusion, special steel is essential to the agriculture industry as it provides the necessary strength, durability, and precision required for various agricultural machinery and equipment. By utilizing these high-quality materials, farmers can enhance productivity, reduce downtime, and achieve sustainable farming practices.

Q: How does special steel contribute to the industrial machinery aftermarket industry?: Special steel plays a crucial role in the industrial machinery aftermarket industry by providing high-quality and durable components that enhance the performance and longevity of machinery. One of the main contributions of special steel to this industry is its exceptional strength and resistance to wear and tear. Industrial machinery is subjected to heavy loads, extreme temperatures, and corrosive environments, which can cause regular steel components to deteriorate quickly. However, special steel alloys are specifically designed to withstand these harsh conditions, ensuring that the machinery operates efficiently for an extended period. Moreover, special steel offers excellent machinability, making it easier to manufacture intricate and precise components. This enables aftermarket manufacturers to produce replacement parts that perfectly fit into existing machinery, minimizing downtime during repairs and maintenance. Additionally, special steel's machinability allows for customization, as it can be easily shaped and modified to meet the specific requirements of different machinery models. Furthermore, special steel's exceptional heat resistance makes it ideal for the production of high-temperature components used in industrial machinery. These components, such as turbine blades or furnace parts, need to withstand intense heat without losing their structural integrity. Special steel alloys possess excellent heat resistance properties, ensuring that the machinery can operate at high temperatures without compromising performance or safety. Additionally, special steel contributes to the industrial machinery aftermarket industry by providing corrosion-resistant components. Many industries, such as oil and gas or marine, expose machinery to corrosive substances or environments. Regular steel components are susceptible to corrosion, leading to premature failure and costly repairs. However, special steel alloys are highly resistant to corrosion, enhancing the durability and reliability of machinery in these demanding conditions. Overall, special steel's unique properties, including strength, machinability, heat resistance, and corrosion resistance, significantly contribute to the industrial machinery aftermarket industry. By utilizing special steel components, manufacturers can enhance the performance, durability, and longevity of machinery, reducing downtime, and improving overall operational efficiency.

Q: Can special steel be used in the production of turbine blades?: Yes, special steel can be used in the production of turbine blades. Special steel, such as superalloys, offers excellent high-temperature strength, corrosion resistance, and fatigue resistance, making it ideal for turbine blade applications where these properties are crucial for optimal performance and durability.

Q: What is the process of manufacturing special steel?: The process of manufacturing special steel involves several steps to ensure the production of high-quality and durable steel with specific properties. 1. Raw Materials Selection: The first step is to carefully select the raw materials required for making special steel. This includes iron ore, coal, and other alloying materials such as chromium, nickel, and manganese, depending on the desired properties of the final product. 2. Melting: The selected raw materials are then melted in a large furnace, often through the use of electric arc furnaces or basic oxygen furnaces. These furnaces heat the raw materials to extremely high temperatures, typically around 1,600 to 2,000 degrees Celsius, to transform them into molten metal. 3. Refining: Once the raw materials are melted, the molten metal undergoes a refining process to remove impurities. This is done through techniques like degassing, desulphurization, and deoxidation, ensuring that the steel is free from unwanted elements that may negatively impact its properties. 4. Alloying: After refining, alloying elements are added to the molten metal to achieve the desired properties. These elements can modify the steel's strength, hardness, corrosion resistance, and other characteristics. The specific alloying elements and their proportions depend on the intended application of the special steel. 5. Continuous Casting: The molten steel is then poured into a continuous casting machine, which solidifies it into semi-finished products called billets, blooms, or slabs. This continuous casting process ensures a consistent and uniform structure throughout the steel. 6. Hot Rolling: The semi-finished products are then reheated and passed through a series of hot rolling mills. This process involves reducing the thickness and shaping the steel into various forms such as bars, rods, plates, or sheets, depending on the intended use. 7. Heat Treatment: After hot rolling, the steel may undergo heat treatment processes such as annealing, quenching, tempering, or case hardening. These treatments help to further enhance the mechanical properties of the steel, such as its hardness, toughness, and ductility. 8. Finishing: The final step involves surface finishing and quality control measures. The steel is inspected for any defects or imperfections that may have occurred during the manufacturing process. Surface treatments like pickling or galvanizing can also be applied to enhance the steel's appearance and protect it from corrosion. Overall, the process of manufacturing special steel is a complex and precise operation that requires careful selection of raw materials, melting, refining, alloying, continuous casting, hot rolling, heat treatment, and finishing. This ensures that the resulting steel meets the specific requirements and performance characteristics demanded by various industries.

Q: What are the factors affecting the machinability of special steel?: The factors affecting the machinability of special steel include the composition and microstructure of the steel, the hardness and strength of the steel, the presence of impurities or inclusions, the cutting tool and its geometry, the cutting speed and feed rate, the coolant or lubricant used during machining, and the machine tool and its rigidity.

Q: How does special steel perform in high-temperature creep conditions?: Special steel performs well in high-temperature creep conditions due to its high strength, excellent resistance to deformation, and superior heat resistance properties. It can withstand prolonged exposure to elevated temperatures without significant deformation or structural failure, making it an ideal choice for applications in industries such as aerospace, power generation, and petrochemicals.

Q: What are the properties of low alloy steel?: Low alloy steel is characterized by its composition, which contains a smaller amount of alloying elements compared to other types of steel. These alloys typically include elements such as nickel, chromium, molybdenum, and vanadium. The properties of low alloy steel include increased strength, improved toughness and hardenability, better corrosion resistance, and enhanced wear resistance. Additionally, low alloy steel offers excellent weldability and malleability, making it suitable for various applications in industries such as automotive, construction, and manufacturing.