Forged SAE 8620 Alloy Steel Round Bar Special Steel
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- Loading Port:
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- 25 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
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: How does special steel resist deformation under load?
- The unique composition and manufacturing techniques of special steel are specifically designed to prevent deformation under load. Its high strength is one of the key factors contributing to this resistance. Special steel is typically alloyed with elements like chromium, nickel, and molybdenum, which enhance its mechanical properties and make it stronger than regular steel. This increased strength allows the steel to bear heavier loads without significant deformation occurring. In addition, special steel often undergoes specialized heat treatment processes like quenching and tempering. These processes alter the steel's microstructure, resulting in a fine-grained structure and increased hardness. The fine-grained structure helps distribute the applied load more evenly, reducing the risk of localized deformation. Furthermore, special steel can exhibit exceptional toughness, meaning it can absorb a significant amount of energy before fracturing. Achieving this toughness involves carefully controlling the steel's chemical composition and manufacturing processes, such as controlling cooling rates during heat treatment. The ability to absorb energy without undergoing deformation further enhances its resistance to load-induced deformation. Moreover, special steel can possess superior fatigue resistance, allowing it to withstand repeated loading and unloading cycles without deformation. This is achieved by eliminating impurities and controlling the steel's grain structure, reducing the initiation and propagation of cracks that can lead to deformation. In conclusion, the combination of high strength, fine-grained structure, toughness, and fatigue resistance in special steel enables it to resist deformation under heavy loads. These characteristics are meticulously engineered and optimized during the manufacturing process to ensure that the steel can withstand intended applications and loads without significant deformation occurring.
- Q: Can special steel be used for making aerospace engine components?
- Yes, special steel can be used for making aerospace engine components. Special steel alloys, such as stainless steel and nickel-based alloys, are often utilized in the aerospace industry due to their high strength, corrosion resistance, and ability to withstand extreme temperatures and pressures. These properties make special steel an ideal choice for critical engine parts like turbine blades, heat exchangers, and exhaust systems, ensuring optimal performance and safety in aerospace applications.
- Q: What are the properties of corrosion-resistant tool steel?
- Corrosion-resistant tool steel possesses a combination of properties that make it resistant to corrosion. These properties include high levels of chromium, which forms a protective oxide layer on the surface of the steel, preventing the penetration of corrosive substances. Additionally, corrosion-resistant tool steel often contains other alloying elements such as molybdenum, vanadium, and tungsten, which further enhance its resistance to corrosion. This type of steel also exhibits high hardness, strength, and wear resistance, making it suitable for use in various tools and applications where corrosion resistance is crucial.
- Q: How does special steel contribute to reducing product downtime?
- Special steel contributes to reducing product downtime by offering superior strength, durability, and corrosion resistance compared to regular steel. This allows for the manufacturing of high-performance components that can withstand harsh operating conditions, reducing the likelihood of breakdowns or failures. Additionally, special steel's enhanced wear resistance prolongs the lifespan of products, minimizing the need for frequent replacements or repairs. Overall, the use of special steel in various industries helps to ensure reliable and uninterrupted operation, leading to reduced downtime and increased productivity.
- Q: Can special steel be used for making marine components?
- Yes, special steel can be used for making marine components. Special steel, also known as marine grade steel, is specifically designed to withstand the harsh conditions of marine environments. These environments are exposed to corrosion, high humidity, and saltwater, which can cause regular steel to deteriorate quickly. Marine grade steel is typically made with added alloys, such as nickel, chromium, and molybdenum, which provide excellent corrosion resistance and durability. These alloys help the steel resist the corrosive effects of saltwater and prevent rusting. Additionally, special steel is often coated with protective coatings or treated to further enhance its resistance to corrosion. Marine components made from special steel include ship hulls, propellers, shafts, valves, pipelines, and various structural elements. The use of special steel ensures the longevity and reliability of these components in demanding marine conditions. Furthermore, the strength and toughness of special steel make it suitable for withstanding the high mechanical stresses and impacts experienced at sea. In summary, special steel is an ideal material for making marine components due to its superior corrosion resistance, durability, and strength. It helps to ensure the longevity and reliability of marine structures and equipment in harsh marine environments.
- Q: What are the main applications of special steel in the power generation equipment?
- Special steel is commonly used in power generation equipment for its high strength, corrosion resistance, and thermal stability. Some key applications include turbine blades, heat exchangers, boiler tubes, and generator components. These specialized steel alloys ensure reliable performance, efficiency, and durability in demanding power generation environments.
- Q: How does special steel perform in impact loading conditions?
- Special steel is known for its exceptional toughness and strength, making it highly effective in impact loading conditions. It can withstand high levels of force and absorb energy, resulting in minimal deformation or damage. This makes special steel a reliable choice for applications where impact resistance is crucial, such as in construction, automotive, and aerospace industries.
- Q: What are the different methods of protecting special steel against corrosion?
- There are several methods of protecting special steel against corrosion. These include applying protective coatings such as paints or epoxy, using sacrificial anodes or cathodic protection to redirect corrosion, employing corrosion inhibitors, and utilizing stainless steel or alloyed steel with higher corrosion resistance. Additionally, proper maintenance and regular inspections can help identify and address any potential corrosion issues early on.
- Q: What are the different international standards for special steel?
- Globally recognized are several international standards for special steel. Among the most prominent are the following: 1. AISI (American Iron and Steel Institute): Widely utilized in North America, AISI standards, also known as SAE (Society of Automotive Engineers) standards, provide specifications for diverse applications of special steel alloys. 2. ASTM (American Society for Testing and Materials): Encompassing a wide range of materials, including special steel, ASTM standards outline the chemical composition, mechanical properties, and testing procedures for various grades. 3. DIN (Deutsches Institut für Normung): Commonly employed in Germany and Europe, DIN standards define the composition, mechanical properties, and other characteristics of special steel alloys. 4. JIS (Japanese Industrial Standards): Extensively embraced in Japan and internationally recognized, JIS standards offer specifications for special steel alloys utilized in industries such as automotive, machinery, and construction. 5. BS (British Standards): Widely applied in the United Kingdom, BS standards furnish specifications for special steel alloys covering aspects such as chemical composition, mechanical properties, and testing procedures. 6. ISO (International Organization for Standardization): Globally acknowledged, ISO standards provide specifications for a broad range of materials, including special steel. These standards ensure uniformity and quality in the production and usage of special steel alloys across different countries. Crucial in ensuring the quality, compatibility, and performance of special steel alloys in various industries globally, these international standards establish a common framework for manufacturers, suppliers, and consumers to communicate and guarantee that the steel meets specific requirements and industry standards.
- Q: How does special steel contribute to the medical field?
- Special steel plays a crucial role in the medical field by offering unique properties and characteristics that are essential for various medical applications. Firstly, special steel is widely used in the production of surgical instruments and medical devices due to its exceptional strength, durability, and corrosion resistance. These qualities ensure that the instruments can withstand the demanding environment of surgical procedures, remain sharp for extended periods, and resist the effects of sterilization processes. Additionally, special steel is utilized in the manufacturing of implants and prosthetics. Its biocompatibility and high strength-to-weight ratio make it an ideal material for creating artificial joints, spinal implants, and dental implants. Special steel's ability to integrate with the human body without causing adverse reactions or rejection is crucial for the success of these medical interventions. Moreover, special steel is employed in the production of medical equipment such as MRI machines, X-ray machines, and radiation shields. The unique magnetic properties of certain types of special steel enable the creation of powerful magnets used in MRI machines, allowing for detailed and accurate imaging of the human body. Furthermore, special steel's ability to shield against radiation makes it an essential component in radiation therapy equipment, protecting healthcare professionals and patients from harmful radiation exposure. In summary, special steel is a critical material in the medical field due to its strength, durability, corrosion resistance, biocompatibility, and unique magnetic properties. Its applications range from surgical instruments and medical devices to implants, prosthetics, and medical equipment. The contributions of special steel in the medical field are indispensable, ensuring the safety, effectiveness, and success of various medical procedures and treatments.
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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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