Forged SAE 8620 Alloy Steel Round Bar Special Steel
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- Min Order Qty:
- 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:What are the requirements for special steel used in high-temperature applications?
- To ensure optimal performance and durability in extreme conditions, special steel utilized in high-temperature applications, such as aerospace, power generation, and oil and gas industries, must fulfill specific criteria. Some essential requirements for this type of steel include: 1. Excellent strength and resistance to deformation at elevated temperatures are vital for maintaining structural integrity and preventing failure or deformation under extreme heat. 2. High resistance to oxidation is necessary to prevent the formation of oxides on the steel's surface, which can weaken its structure and compromise its performance. 3. Exceptional creep resistance is essential to prevent excessive deformation or failure over time caused by constant stress at high temperatures. 4. Good thermal stability allows the steel to retain its mechanical properties even after prolonged exposure to high temperatures, ensuring reliable and consistent performance. 5. In addition to oxidation, the steel must also possess good corrosion resistance to protect against various corrosive agents present in the environment, such as acids, alkalis, and salts. 6. High resistance to thermal fatigue is crucial to prevent cracking, fracturing, or failure due to repeated heating and cooling cycles. 7. Low thermal expansion minimizes dimensional changes and maintains dimensional stability under high-temperature conditions, preventing unwanted distortions or misalignments. 8. Good weldability facilitates the fabrication and joining of components, enabling the construction of complex structures and assemblies required in high-temperature environments. By meeting these requirements, special steel used in high-temperature applications can withstand extreme heat, preserve its structural integrity, and deliver reliable performance in demanding conditions.
- Q:Can special steel be used in the plastic manufacturing industry?
- Yes, special steel can be used in the plastic manufacturing industry. Special steel alloys, such as tool steels, can be employed in the production of molds and dies used for shaping and forming plastic materials. These high-strength steels are essential for withstanding the high temperatures and pressures involved in plastic injection molding and other manufacturing processes. Special steel's durability and resistance to wear make it an ideal choice for enhancing the longevity and performance of plastic manufacturing equipment.
- Q:How are cobalt-based alloys used in dental applications?
- Cobalt-based alloys are used in dental applications due to their unique properties such as high strength, corrosion resistance, and biocompatibility. They are commonly used in dental prosthesis, crowns, and bridges because they can withstand the harsh oral environment and provide long-term durability. Additionally, these alloys allow for precise and accurate fitting, ensuring optimal functionality and aesthetic appeal in dental restorations.
- Q:What are the different welding techniques for special steel?
- There are several different welding techniques that can be used for special steel, depending on the specific requirements and characteristics of the steel. Some of the commonly used welding techniques for special steel include: 1. Shielded Metal Arc Welding (SMAW): Also known as stick welding, SMAW uses a consumable electrode coated in flux to create an arc between the electrode and the base metal. This technique is versatile and can be used for a wide range of steel types, including special steel. 2. Gas Metal Arc Welding (GMAW): Also known as MIG (Metal Inert Gas) welding, GMAW uses a continuous solid wire electrode and a shielding gas to protect the weld from atmospheric contamination. This technique is commonly used for thinner special steel materials. 3. Flux-Cored Arc Welding (FCAW): Similar to GMAW, FCAW uses a continuous tubular electrode filled with flux. This flux provides additional shielding and can allow for higher deposition rates. FCAW is suitable for special steel with thick sections or when welding in outdoor or windy conditions. 4. Gas Tungsten Arc Welding (GTAW): Also known as TIG (Tungsten Inert Gas) welding, GTAW uses a non-consumable tungsten electrode and a shielding gas. This technique is known for its precision and is often used for special steel alloys that require high-quality and aesthetically pleasing welds. 5. Plasma Arc Welding (PAW): PAW is similar to GTAW but uses a more focused arc created by passing gas through a constricted nozzle. This technique is often used for special steel alloys that have higher melting temperatures or require deeper penetration. 6. Submerged Arc Welding (SAW): SAW involves feeding a continuous wire electrode into a molten flux layer that covers the weld. This technique is commonly used for heavy and thick special steel sections, as it provides excellent penetration and high deposition rates. It is important to choose the most appropriate welding technique for special steel based on factors such as the steel composition, thickness, intended application, and desired weld quality. Consulting with a qualified welding professional or referring to the steel manufacturer's recommendations can help ensure the best welding technique is selected for the specific special steel being used.
- Q:What are the different marine grades of special steel?
- Marine environments pose severe challenges, necessitating the use of specialized steel grades. These grades are classified based on their corrosion resistance and mechanical properties. 316 stainless steel is a widely employed marine grade. It contains higher proportions of molybdenum and nickel, enhancing its resistance to corrosion from saltwater and other harsh chemicals. This grade finds utility in marine hardware, including bolts, nuts, and screws, as well as marine structures and equipment. 2205 duplex stainless steel is another marine grade that surpasses 316 stainless steel in terms of strength and corrosion resistance. It is preferred for marine applications requiring durability and high strength, such as propeller shafts, offshore structures, and pressure vessels. 5083 aluminum-magnesium alloy is commonly employed in marine applications where weight is a concern. This special steel grade offers exceptional corrosion resistance and strength, making it suitable for boat hulls, superstructures, and lightweight marine components. Moreover, a range of high-strength low-alloy (HSLA) steels are utilized in marine applications. These steels are specifically engineered to deliver superior strength, toughness, and corrosion resistance. They find widespread use in shipbuilding, offshore drilling rigs, and other marine structures that demand durability and strength. In conclusion, the diverse marine grades of special steel present a wide array of options for various marine applications. The selection of a particular grade depends on project-specific requirements, including corrosion resistance, strength, and weight considerations.
- Q:Can special steel be used in the manufacturing of precision instruments?
- Yes, special steel can be used in the manufacturing of precision instruments. Special steel refers to a category of steel that has been specifically designed and processed to possess certain properties, such as high strength, hardness, corrosion resistance, and thermal stability. These properties make special steel ideal for applications where precision and accuracy are crucial, such as in the manufacturing of precision instruments. Precision instruments, such as surgical tools, measuring devices, optical instruments, and scientific equipment, require materials that can maintain dimensional stability and withstand extreme conditions. Special steels, such as stainless steel, tool steel, and high-speed steel, offer excellent mechanical properties, including high tensile strength, wear resistance, and dimensional stability. This makes them well-suited for precision instrument manufacturing. Furthermore, special steel can be engineered to have specific characteristics, such as low magnetic permeability or excellent resistance to temperature changes. These properties are particularly important in precision instruments where magnetic interference or temperature variations can affect their performance. In conclusion, special steel can indeed be used in the manufacturing of precision instruments due to its exceptional mechanical properties, dimensional stability, and ability to withstand extreme conditions. Its versatility allows for the production of high-quality precision instruments that meet the stringent requirements of various industries, including medical, scientific, and engineering fields.
- 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:How is special steel used in the medical supply chain?
- Special steel is used in the medical supply chain for a variety of applications. It is utilized in the manufacturing of surgical instruments, implantable devices, and medical equipment due to its high strength, corrosion resistance, and biocompatibility. Special steel ensures the durability and reliability of these critical medical supplies, contributing to the safety and effectiveness of healthcare procedures and treatments.
- Q:What are the properties of die steel?
- Die steel, also known as tool steel, possesses various properties that make it suitable for use in die and mold-making applications. Some of the key properties of die steel include: 1. Hardness: Die steel is known for its high hardness, which helps in resisting wear, abrasion, and deformation during the manufacturing process. 2. Toughness: Die steel exhibits good toughness, enabling it to withstand higher impact and shock loads without fracturing or breaking. 3. Wear resistance: Die steel has excellent wear resistance, allowing it to maintain its shape and sharpness even when subjected to repeated contact with other materials. 4. Heat resistance: Die steel can withstand high temperatures without losing its hardness and strength, making it ideal for applications involving hot working conditions. 5. Machinability: Die steel is relatively easy to machine, allowing for the precise shaping and forming of dies and molds. 6. Corrosion resistance: Depending on the specific alloy composition, die steel can offer varying degrees of corrosion resistance, protecting it from environmental factors. Overall, the properties of die steel contribute to its ability to withstand high pressures, temperatures, and mechanical stresses, making it a preferred material for manufacturing dies and molds used in various industries.
- Q:How does special steel contribute to the magnetic properties of products?
- Special steel can contribute to the magnetic properties of products by having specific alloying elements and heat treatments that enhance its ferromagnetic properties, resulting in higher magnetic permeability and increased magnetization.
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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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