Forged SAE 8620 Alloy Steel Round Bar Special Steel
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Item specifice
Forged SAE 8620 Alloy Steel Round Bar Special Steel
Description:
8620 is a low nickel - chromium - molybdenum medium hardenability, case hardening (carburizing) steel, generally supplied in the as rolled condition with a maximum brinell hardness of 280 (Rc30).
Characterised by good core strength and toughness in small to medium sections with case hardness up to Rc62 when carburized, hardened and tempered.
8620 can also be used (uncarburised) as a high tensile steel, which when suitably hardened and tempered can be utilized for various applications requiring good tensile strength and reasonable toughness.
Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content.
8620 (carburized) is used extensively by all industry sectors for light to medium stressed components and shafts requiring high surface wear resistance with reasonable core strength and impact properties.
APPLICATIONS:
AISI 8620 is a common, carburizing alloy steel used for a variety of medium-strength applications including gears, camshafts, fasteners, and chains/chain pins. Flexibility in hardening treatments allow optimization of case/core properties. Typical uses are: Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Splined Shafts, Ratchets, Sleeves etc..
Related Specifications
Australia AS 1444-1996-8620/8620H
Germany W.Nr 1.6523 DIN 21NiCrMo2
Great Britain BS970: PART 3: 1991 805 M20
BS970: 1955 - EN362
Japan JISG 4052 SNCM 220H
JIS SNCM 21 , JIS SNCM 21 H
U.S.A. SAE 8620 AISI 8620
ASTM A29/A29M 1991 8620
UNS G86200
AMS 6274 , AMS 6274G , AMS 6276 , AMS 6276C , AMS 6277 , AMS 6277A ,
ASTM A322 , ASTM A331 , ASTM A505 , ASTM A513 ,
MIL SPEC MIL-S-16974 ,
SAE J404 , SAE J770 ,
UNS G86200
France: AFNOR 20 NCD 2 , AFNOR 22 NCD 2
Italy: UNI 20 NiCrMo 2
Chemical Composition(%):
Carbon 0.17-0.23
Silicon 0.10-0.40
Manganese 0.60-0.95
Nickel 0.35-0.75
Chromium 0.35-0.75
Molybdenum 0.15-0.25
Phosphorous 0.04 max
Sulphur 0.04 max
Process: EAF+LF+VOD+Rolled+Heat Treatment(optional)
SURFACE FINISHES:
Black, Peeled (K12), Cold Drawn, Turned & Polished (H10, H11), Precision Ground (H9, H8)
Test: Ultrasonic test according to SEP 1921-84 3C/c
Forging
Heat to 1150 oC and hold until temperature is uniform throughout the section. Soaking time at forging temperature should be as short as possible to avoid heavy scaling and excessive grain growth. This will vary depending on furnace conditions but 15 minutes per 25 mm of section may be used as a guide.Do not forge below 850 oC.
Following completion of forging operation, work piece should be cooled as slowly as possible in sand or dry lime etc.
Note: Case hardening steels due to their low carbon content are less susceptible to cracking than medium or high carbon steels, and may therefore be heated and cooled more rapidly.
Machining
8620 in the as rolled as supplied condition, has very good machinability and all operations such as turning, drilling, milling and tapping etc. can be carried out satisfactorily as per machine manufacturers recommendations for suitable tool type - feeds and speeds.
Welding
8620 is readily weldable in the as rolled as supplied condition. Following welding, the work piece immediately upon cooling to hand warm should be stress relieved at 630 oC - 650 oC if possible.
N.B. Welding in the carburized and heat treated condition is not recommended.
Welding Procedure
Welding of 8620 should always be carried out using low hydrogen electrodes - please consult your welding consumables supplier.
Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.
Marking: Heat No. will be cold stamped and Steel grade, diameter (mm), length (mm), and the manufacturer LOGO and weight (kg) is painted
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- Q:What are the applications of special steel in the defense sector?
- Special steel has numerous applications in the defense sector due to its exceptional strength, durability, and resistance to extreme conditions. It is commonly used to manufacture various components of weapons and military vehicles, such as gun barrels, armor plates, missile casings, and aircraft landing gear. Additionally, special steel is utilized in the construction of submarines, warships, and military infrastructure due to its corrosion resistance properties. Overall, special steel plays a crucial role in enhancing the performance, efficiency, and safety of defense equipment and infrastructure.
- Q:Can special steel be used in marine environments?
- Indeed, marine environments can benefit from the utilization of special steel. Specifically engineered to endure the harsh conditions prevalent in marine settings, special steel, such as stainless steel or marine-grade steel, proves its worth. These environments typically expose materials to saltwater, which possesses a highly corrosive nature. Nonetheless, special steel's resistance to corrosion remains intact due to its elevated levels of chromium and other alloying elements. Consequently, it becomes exceedingly suitable for an array of marine applications, encompassing shipbuilding, offshore structures, and marine equipment. The reliability of special steel lies in its exceptional strength, durability, and corrosion resistance. Moreover, to further augment its resistance to corrosion, special steel can undergo additional treatment and coating, thereby guaranteeing its longevity and optimal performance in marine conditions.
- Q:How does special steel contribute to the automotive exhaust system industry?
- Special steel plays a crucial role in the automotive exhaust system industry by offering several significant contributions. Firstly, special steel, such as stainless steel, is highly resistant to corrosion, which is a common issue faced by exhaust systems due to the exposure to high temperatures and corrosive gases. This corrosion resistance ensures the longevity and durability of the exhaust system, reducing the need for frequent replacements and repairs. Moreover, special steel possesses excellent heat resistance properties. The exhaust system operates under extreme temperatures, and special steel can withstand these conditions without undergoing deformation or structural damage. This ability to handle high temperatures ensures that the exhaust system functions efficiently and maintains its performance over an extended period. In addition, special steel offers exceptional strength and durability. The exhaust system is subjected to constant vibrations, impacts, and stress due to road conditions and engine movements. Special steel's high strength and toughness enable the exhaust system to withstand these forces, preventing premature failures and ensuring the safety and reliability of the vehicle. Furthermore, special steel allows for the design and manufacturing of complex and lightweight exhaust system components. With advancements in steel technology, manufacturers can create intricate shapes and thin-walled structures, reducing the overall weight of the exhaust system. This weight reduction contributes to improved fuel efficiency and vehicle performance, as it reduces the overall load on the engine. Lastly, special steel provides the automotive industry with the flexibility to meet increasingly stringent emission regulations. By utilizing special steel in the exhaust system, manufacturers can incorporate catalytic converters and other emission control devices effectively. These devices play a vital role in reducing harmful emissions, such as carbon monoxide, nitrogen oxides, and particulate matter, helping vehicles meet environmental standards. In conclusion, special steel is an essential component in the automotive exhaust system industry. Its corrosion resistance, heat resistance, strength, and lightweight properties contribute to the longevity, reliability, and performance of the exhaust system. Moreover, special steel enables compliance with emission regulations, ensuring that vehicles are environmentally friendly. Overall, special steel plays a critical role in enhancing the efficiency and sustainability of the automotive exhaust system industry.
- Q:How does special steel contribute to the automotive noise reduction?
- Special steel contributes to automotive noise reduction through its unique properties and manufacturing processes. Special steels, such as high-strength steel and acoustic steel, are specifically designed to absorb or dampen vibrations and sound waves, resulting in reduced noise levels within the vehicle cabin. These steels possess enhanced damping characteristics, which help to minimize the transmission of noise generated by the engine, road, and other external sources. Additionally, special steel's superior strength and stiffness properties allow for the design of lighter and more rigid vehicle structures, which further aid in noise reduction by reducing vibrations and minimizing the potential for rattling noises. Overall, the use of special steel in automotive applications plays a crucial role in enhancing overall driving comfort and reducing noise pollution.
- Q:How does spring steel maintain its elasticity?
- Spring steel maintains its elasticity due to its unique composition and manufacturing process. It is made from a specific type of high-carbon steel that undergoes a specialized heat treatment called quenching and tempering. This process involves heating the steel to a high temperature and then rapidly cooling it in water or oil, followed by reheating to a specific temperature and allowing it to cool slowly. This heat treatment creates a fine-grained microstructure in the steel, which gives it the ability to withstand repeated bending or twisting without permanently deforming. Additionally, the high carbon content in spring steel enhances its strength and resilience, allowing it to return to its original shape even after being subjected to significant force or pressure.
- Q:How is special steel used in the production of heat exchangers?
- Special steel, with its unique properties, finds extensive application in the production of heat exchangers. These devices are designed to transfer heat between different mediums, and special steel offers several advantages in this process. To begin with, the thermal conductivity of special steel is exceptional, allowing for efficient heat transfer between fluids. This characteristic is vital for heat exchangers as it enables the rapid and effective exchange of thermal energy. Moreover, special steel exhibits high resistance to corrosion, making it highly suitable for heat exchanger applications. Since heat exchangers often come into contact with corrosive fluids or gases, regular steel may deteriorate over time. However, special steel is specifically engineered to resist corrosion, ensuring the durability and reliability of the heat exchanger. Furthermore, special steel possesses remarkable strength and durability, enabling heat exchangers to withstand high pressures and temperatures. Given that heat exchangers frequently operate in challenging environments, special steel can endure these harsh conditions without compromising its structural integrity. Additionally, special steel offers excellent weldability and formability, simplifying the manufacturing of intricate heat exchanger designs. Its versatility allows for the production of heat exchangers in various shapes and sizes, catering to the specific requirements of different industries. In conclusion, special steel is an ideal material for heat exchanger applications due to its high thermal conductivity, corrosion resistance, strength, durability, weldability, and formability. These properties ensure efficient heat transfer, resistance to corrosion, and the ability to withstand harsh operating conditions.
- Q:How does special steel perform in terms of magnetic permeability?
- Special steel typically has a lower magnetic permeability compared to other materials, meaning it has a weaker response to magnetic fields.
- Q:What are the challenges in manufacturing special steel?
- Some of the challenges in manufacturing special steel include the high cost of raw materials, the complex and precise production processes, ensuring consistent quality and performance, meeting specific customer requirements, and staying up-to-date with rapidly advancing technologies and industry standards. Additionally, the demand for customization and shorter lead times can also present challenges in terms of production planning and logistics.
- Q:What are the requirements for special steel used in power generation equipment manufacturing?
- The standards for manufacturing special steel used in power generation equipment are very strict. The steel must be incredibly strong and durable in order to withstand the extreme conditions and heavy loads that power generation equipment experiences. This includes the ability to handle high temperatures, pressure, and mechanical stress. In addition to these requirements, the steel used in power generation equipment must also have excellent resistance to corrosion and oxidation. Since power generation equipment often operates in challenging environments, such as high humidity or exposure to corrosive substances, the steel must be highly resistant to ensure it lasts a long time and performs well. Furthermore, the steel used in power generation equipment must be easy to weld and shape. This is important for the manufacturing process, as power generation equipment often requires complex shapes and structures. The ability to accurately weld and shape the steel is essential. Another important requirement is the steel's ability to maintain its mechanical properties at high temperatures. Power generation equipment, like boilers or turbines, operates at elevated temperatures, and the steel used must retain its strength, resistance to deformation, and dimensional stability under these conditions. Finally, the special steel used in power generation equipment must meet industry standards and specifications. These standards ensure that the steel used in manufacturing is of high quality, reliable, and safe. Compliance with these standards is crucial to ensure the equipment performs well and lasts a long time. Overall, the requirements for special steel used in power generation equipment manufacturing are demanding. The steel must be strong, durable, resistant to corrosion and oxidation, easy to weld and shape, able to withstand high temperatures, and compliant with industry standards. Meeting these requirements is vital for the efficient and reliable operation of power generation equipment.
- Q:Can special steel be used for automotive engine components?
- Yes, special steel can be used for automotive engine components. Special steels such as high-strength, heat-resistant, and corrosion-resistant alloys are often employed in manufacturing engine components to ensure durability, performance, and efficiency under demanding conditions.
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Forged SAE 8620 Alloy Steel Round Bar Special 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
OKorder Service Pledge
OKorder Financial Service
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