Special Steel Gear Steel SCM420H Round Bar

Special Steel Gear Steel SCM420H Round Bar System 1

Special Steel Gear Steel SCM420H Round Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Product information:

1. Grade Comparison

GB	DIN	JIS	NF	BS	AISI
20CrMoH	25CrMo4	SCM420	25CrMo4	25CrMo4	4118

2. Specification

Commodity	SCM420H Round bar
diameter	10-300mm
Length	3000-15000mm
Productive Technology	Hot-Rolled
Tolerance	+/-0.15mm
Application	Gear. Axis. Ring. Gears shafts. Sliding bearing spindle beams and Clutch etc
	C	0.17-0.23
Chemical Composition of Material	Si	0.15-0.35
	Mn	0.55-0.90
	P	0.030
	S	0.030
	Cr	0.85-1.25
	Ni	0.030
	Cu	0.030
Mechanical Property	Tensile Strength	1080
	Yield Strength	835
	Extension	≥10
	Hardness	217HB

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Special Steel Gear Steel SCM420H Round Bar

Shipping

1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

Delivery Time: 3-7 days for samples; 5-25 days for batch goods.

Payment Terms

1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.

2.MOQ: 1pcs

3.Warranty : 3 years

4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)

2)as customer's requirement

Why choose us?

(1) The leading exporter in China special steel industry.

(2) Large stocks for various sizes, fast delivery date.

(3) Good business relationship with China famous factories.

(4) More than 7 years steel exporting experience.

(5) Good after-sales service guarantee.

Q: How are nickel-based alloys used in the aerospace industry?: Nickel-based alloys are extensively used in the aerospace industry due to their exceptional strength, heat resistance, and corrosion resistance properties. These alloys are commonly used in the manufacturing of various aerospace components such as turbine blades, combustion chambers, and exhaust systems. Their high temperature stability allows them to withstand extreme conditions in jet engines, while their corrosion resistance ensures longevity and reliability. Additionally, nickel-based alloys also contribute to weight reduction in aircraft, as they possess a high strength-to-weight ratio, making them an ideal choice for enhancing fuel efficiency and overall performance in the aerospace industry.

Q: How does special steel perform in terms of corrosion resistance in marine environments?: Special steel alloys, specifically designed for marine environments, exhibit excellent corrosion resistance. Due to their higher levels of alloying elements like chromium, nickel, and molybdenum, these steels form a protective oxide layer that prevents rusting and pitting, even when exposed to saltwater and other harsh marine conditions. Their exceptional corrosion resistance ensures prolonged durability, reduced maintenance, and enhanced performance in marine environments.

Q: Can special steel be used for making power generation equipment?: Yes, special steel can be used for making power generation equipment. Special steel is known for its high strength, durability, and resistance to corrosion, making it an ideal choice for manufacturing components such as turbines, generators, and boilers that are used in power generation processes.

Q: How does special steel perform in electrical conductivity applications?: Special steel, also known as stainless steel, offers excellent electrical conductivity properties in various applications. It is widely used in electrical engineering and electronics due to its high corrosion resistance and low electrical resistance. The addition of specific alloys such as chromium and nickel enhances its conductivity, making it an ideal choice for conducting electricity efficiently. In electrical conductivity applications, special steel exhibits low resistivity, allowing for the smooth flow of electrical current without significant loss of energy. Its low resistance minimizes the generation of heat, which is crucial for preventing overheating and ensuring the efficient operation of electrical components. Special steel also possesses excellent magnetic properties, making it suitable for applications that require both electrical conductivity and magnetic strength. This property is particularly useful in the production of transformers, motors, and generators. Moreover, special steel is highly durable and can withstand harsh environmental conditions, making it suitable for outdoor applications. Its corrosion resistance prevents the formation of rust, ensuring a long lifespan and consistent performance even in challenging environments. In summary, special steel is an excellent choice for electrical conductivity applications due to its low electrical resistance, high corrosion resistance, and exceptional durability. Its unique properties make it a preferred material in various industries that rely on efficient and reliable electrical conductivity.

Q: What are the specific requirements for special steel used in the automotive piston industry?: In order to ensure high performance, durability, and efficiency of pistons in the automotive piston industry, specific requirements for the special steel used have been established. These requirements encompass the following: 1. High tensile strength and hardness are essential for the special steel used in automotive pistons to withstand the extreme pressures and temperatures generated during combustion. 2. The steel must exhibit exceptional heat resistance properties to endure the intense heat produced by the combustion process without distorting or losing strength. 3. Given the constant friction and wear that pistons endure against the cylinder walls, the special steel used must possess good wear resistance to minimize wear and tear and extend the lifespan of the piston. 4. To ensure a secure seal between the piston and cylinder walls, the steel should have a low coefficient of thermal expansion, preventing excessive expansion and contraction during temperature fluctuations. 5. Since pistons are exposed to various corrosive elements, such as combustion by-products and engine oil, the special steel used in their manufacturing must possess good corrosion resistance to prevent premature deterioration and failure. 6. The steel should exhibit excellent fatigue resistance to withstand the repetitive stress cycles experienced by the piston during engine operation. 7. Special steel used in pistons should be easily machinable, allowing for precise dimensions and tolerances necessary for optimal performance. 8. While meeting the aforementioned requirements, special steel used in the automotive piston industry should also be cost-effective to ensure profitability for manufacturers. By meeting these specific requirements, the special steel used in the automotive piston industry contributes to the overall performance, reliability, and longevity of the piston. Consequently, this enhances the efficiency and durability of the entire engine system.

Q: How does special steel contribute to the manufacturing industry?: Special steel contributes to the manufacturing industry by providing superior strength, durability, and performance in various applications. Its unique composition and properties allow for the production of high-quality components and machinery that can withstand extreme conditions, ensuring safety and reliability. Additionally, special steel enables manufacturers to create lightweight and efficient products, leading to cost savings and environmental sustainability.

Q: What are the requirements for special steel used in corrosive environments?: Special steels used in corrosive environments are required to have specific properties to ensure their durability and performance in such conditions. The requirements for these steels can be summarized as follows: 1. Corrosion resistance: The primary requirement for special steels used in corrosive environments is excellent corrosion resistance. These steels should be able to withstand the attack of aggressive substances such as acids, alkalis, and salts. They should exhibit minimal or no signs of corrosion, ensuring the longevity of the steel and preventing any degradation in performance. 2. High strength: Special steels used in corrosive environments should possess high strength to handle the mechanical stresses imposed on them. This property is crucial for applications where the steel is subjected to heavy loads, pressures, or impacts. High strength also helps in maintaining the integrity and structural stability of the steel in corrosive conditions. 3. Resistance to pitting and crevice corrosion: Pitting and crevice corrosion are localized forms of corrosion that can occur in the presence of certain aggressive chemicals or stagnant environments. Special steels should have resistance to such forms of corrosion, as they can lead to localized damage, reduced structural integrity, and potential failure of the steel. 4. Stress corrosion cracking resistance: Stress corrosion cracking is a phenomenon that occurs when a combination of tensile stress and a corrosive environment compromises the material's integrity. Special steels should be resistant to stress corrosion cracking, ensuring their reliability under applied loads in corrosive environments. 5. Resistance to intergranular corrosion: Intergranular corrosion can occur along grain boundaries, leading to the weakening of the material. Special steels used in corrosive environments should have good resistance to intergranular corrosion, preventing any loss in structural integrity. 6. Thermal stability: Special steels should exhibit thermal stability to maintain their properties and resist degradation at elevated temperatures. This characteristic is essential for applications involving high-temperature corrosive environments. 7. Easy maintenance: Special steels used in corrosive environments should be relatively easy to maintain. This includes aspects such as ease of cleaning, resistance to fouling or scaling, and compatibility with cleaning agents or procedures commonly used in the industry. It is important to note that the specific requirements for special steels used in corrosive environments may vary depending on the application and the type of corrosive substances encountered. Therefore, it is crucial to carefully consider the particular needs and consult with experts in the field to select the most appropriate steel for each specific corrosive environment.

Q: How does special steel perform in terms of electrical conductivity?: Special steel generally has poor electrical conductivity compared to other metals such as copper or aluminum. However, its electrical conductivity can be improved through specific alloying elements and heat treatments.

Q: How is special steel used in the food processing industry?: Special steel is used in the food processing industry for various applications such as manufacturing equipment and machinery, utensils, and containers. Its unique properties, including corrosion resistance, durability, and hygiene, make it suitable for ensuring food safety and maintaining high standards in processing and handling.

Q: How does special steel contribute to the manufacturing of cutting tools?: Due to its unique properties and characteristics, special steel plays a crucial role in the manufacturing of cutting tools. Tool steel, also known as special steel, exhibits high hardness, enabling it to withstand the tremendous forces and stress exerted during cutting operations, preventing quick deformation or wear of the cutting tools and ensuring their longevity and efficiency. In addition, special steel possesses excellent wear resistance, minimizing the wear and tear on the tools subjected to constant friction and abrasion. This improves the tool's lifespan, reducing the need for frequent replacements and enhancing cost-effectiveness in the manufacturing process. Furthermore, special steel offers superior heat resistance, maintaining its hardness and integrity even under high temperatures. This allows cutting tools to perform consistently and precisely, even in extreme heat conditions, preventing thermal degradation and loss of hardness. Moreover, special steel used in cutting tool manufacturing exhibits excellent toughness and strength, enabling the tools to endure heavy loads and impacts without fracturing or chipping. The combination of hardness, wear resistance, heat resistance, toughness, and strength provided by special steel ensures the durability and reliability of cutting tools, allowing them to perform efficiently and accurately. Overall, special steel significantly contributes to the manufacturing of cutting tools, providing the necessary properties to withstand demanding cutting conditions. Its high hardness, wear resistance, heat resistance, toughness, and strength ensure that cutting tools remain sharp, durable, and efficient, enhancing productivity and precision in various industries, including automotive, aerospace, and manufacturing.

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