Japanese Standard Bearing Steel System 1

Japanese Standard Bearing Steel

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Loading Port:: Guangzhou

Payment Terms:: TT or LC

Min Order Qty:: 25MT m.t.

Supply Capability:: 600000 Tons/Year m.t./month

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Specifications of Japanese Standard Bearing Steel

Material		SUJ2
Chemical Composition		Mechanical Properties(In Quenched & Tempered State)
C	0.95-1.05	Hardness	HRC≈67
Si	0.15-0.35		HRC61-66
Mn	0.25-0.45		HRC62-66
Cr	1.40-1.65		--
Mo	≤0.10		--
P	≤0.025		HB170-207
S	≤0.025		HB207-229
Cu	≤0.25		HB270-390
Ni+Cu	≤0.50		HB229-285

Dimension: Thickness: 20mm-1000mm, Length: 500mm-6000mm

Technique: Hot rolled, cold drawn, forged

Surface treatment: Black, grinding, bright, polish

Type: Alloy Steel Bar

Documents required: Commercial invoice; Packing list; Bill of lading; Certificate of origin and others that the target market needs.

Usage and Applications of Japanese Standard Bearing Steel

High Quality Bearing steel is used for manufacturing ball, roller bearing steel and rings. Bearing in work is under great pressure and friction, so have high demands bearing steel and hardness and resistance, and high elastic limit.

Bearing steels are used for ball and roller bearing applications and are comprised of low carbon steels and high carbon through harden able steel.

For example, bearing ring, steel rolling mill, machinery, 100Cr6 bearing steel ball is widely used in high-speed and low-noise bearing, bicycle, motorcycle, automobile, bags electronically.

Performance of Bearing Steel

Packaging & Delivery of Japanese Standard Bearing Steel

Packaging Detail: Standard seaworthy packing or as customer required.

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons or at customer's demands

Weight: Theprice invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request.

Other equivalent steel materials of Japanese Standard Bearing Steel

USA	Japanese	Germany	British	France
ASTM&AISI&SAE	JIS	EN DIN	EN BS	EN NF
52100	SUj2	100Cr6	100Cr6	100Cr6
52100	SUj2	1.2067	1.2067	1.2067

Characteristics of Japanese Standard Bearing Steel

1. The technical workers we employed are the ones with many years’ working experience, who know the technology procedures very well.

2. We will strictly inspect our production that we sold according to the customer’s request.

3. Our steel reaches international quality standards. Besides, our company is equipped with large-sized vertical saw machines, horizontal saw machines, milling machines, grinding machines and other advanced equipment. All our products are carried out hardness tests, such as the ultrasonic flaw detection before shipment. Therefore, there is no quality problem. With more competitive price than other suppliers, our steel has good sales in the markets of North America, South America, East Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia and West Europe.

4. We can accept L/C usance or L/C at sight.

5. Quality should be in conformity with the specification of the manufacturer. Quantity and packing conditions should be in conformity with the term in this contract.

Q: What are the different coating techniques for special steel parts?: There are several coating techniques that can be used for special steel parts, depending on the specific requirements and desired properties. Here are some of the commonly used coating techniques: 1. Electroplating: This technique involves depositing a layer of metal onto the surface of the steel part through an electrochemical process. It provides excellent corrosion resistance and can also enhance the appearance of the part. 2. Thermal spraying: This technique involves melting or heating a coating material and spraying it onto the steel surface. It can be done using various methods such as flame spraying, plasma spraying, or arc spraying. Thermal spraying is commonly used to provide wear resistance, thermal insulation, or to restore damaged parts. 3. PVD (Physical Vapor Deposition): PVD is a vacuum coating technique where a thin film is deposited onto the steel surface. This method offers a wide range of coatings, including decorative finishes, hard coatings for wear resistance, and low-friction coatings. 4. DLC (Diamond-Like Carbon) coating: DLC is a type of PVD coating that provides a thin layer of carbon-based material with properties similar to diamond. It offers excellent hardness, low friction, and high wear resistance, making it suitable for applications where durability and performance are crucial. 5. Powder coating: Powder coating involves applying a dry powder to the steel part and then curing it through heat or ultraviolet light. This technique provides a durable and attractive finish, offering excellent corrosion resistance and protection against impact and abrasion. 6. Chemical conversion coating: This technique involves treating the steel surface with a chemical solution that forms a protective layer on the surface. Common types of chemical conversion coatings include phosphating, chromating, and anodizing. These coatings improve corrosion resistance, paint adhesion, and can also provide electrical conductivity. It is essential to choose the appropriate coating technique based on factors such as the desired properties, environmental conditions, cost-effectiveness, and the specific application requirements for special steel parts.

Q: How does special steel contribute to the marine machinery industry?: The marine machinery industry greatly relies on special steel, which offers numerous advantages and contributes significantly to the efficiency and reliability of marine machinery. Above all else, special steel is renowned for its exceptional strength and durability. In the harsh marine environment, where machinery is constantly exposed to extreme weather conditions and high levels of corrosion, special steel ensures that marine machinery can withstand these challenges and maintain its integrity over a prolonged period. This enhanced durability not only extends the lifespan of marine machinery but also reduces the frequency of repairs and replacements, thereby resulting in cost savings for shipbuilders and operators. Furthermore, special steel possesses excellent welding and fabrication properties, making it easier to construct complex components of marine machinery. The ability to weld and fabricate special steel allows for the production of intricate and customized parts, which can be tailored to meet the specific requirements of different marine vessels. This design flexibility ensures that marine machinery is optimized for performance, efficiency, and safety. Moreover, special steel exhibits outstanding resistance to corrosion and erosion, which are common problems in marine environments due to saltwater and other corrosive agents. By utilizing special steel, marine machinery can effectively resist corrosion, preventing premature failure and reducing the need for maintenance. This corrosion resistance also enhances the overall safety of marine operations by significantly reducing the risk of machinery malfunction due to corrosion-related issues. In terms of efficiency, special steel contributes to the marine machinery industry by offering superior heat resistance and thermal conductivity. This enables marine machinery to operate at high temperatures without compromising performance, ensuring efficient energy conversion and optimal functioning of critical systems. The improved thermal properties of special steel also contribute to the overall fuel efficiency of marine vessels, resulting in reduced operational costs and environmental impact. In conclusion, special steel plays a vital role in the marine machinery industry by providing the necessary strength, durability, corrosion resistance, and thermal properties for the efficient and reliable operation of marine machinery. By harnessing the benefits of special steel, shipbuilders and operators can enhance the longevity, safety, and performance of marine vessels, ultimately contributing to the growth and sustainability of the marine industry.

Q: What are the main factors affecting the strength of special steel?: The main factors affecting the strength of special steel are the composition of alloying elements, heat treatment processes, and the grain size of the steel.

Q: What are the common challenges in heat treating titanium alloys?: There are various difficulties encountered when heat treating titanium alloys. One of the primary obstacles arises from titanium's strong tendency to react with oxygen, nitrogen, and hydrogen at elevated temperatures. This reactivity can lead to contamination on the surface and the creation of unwanted oxides, nitrides, or hydrides, which can adversely affect the mechanical characteristics of the alloy. Another challenge involves the development of alpha-case, a thick layer of alpha-phase titanium that forms on the alloy's surface during the heating process. This alpha-case is brittle and can significantly diminish the material's fatigue strength and ductility. Consequently, it is crucial to minimize or eliminate the formation of alpha-case during titanium alloy heat treatment. Moreover, titanium alloys have a limited temperature range for effective heat treatment. If the temperature is too low, the desired microstructure and mechanical properties may not be achieved. Conversely, if the temperature is too high, grain growth can occur, resulting in reduced strength and toughness of the alloy. Furthermore, precise control over the heating and cooling rates is often required when heat treating titanium alloys to achieve the desired microstructure and properties. Inadequate or uneven cooling can lead to non-uniform microstructures, residual stresses, or distortion of the component. Finally, the cost of heat treating titanium alloys can pose a challenge. Titanium alloys have a high affinity for oxygen, necessitating the use of specialized equipment such as vacuum furnaces or controlled atmosphere furnaces to maintain a low oxygen environment. These specialized heat treatment processes can be costly and demand careful handling and maintenance to ensure the desired outcomes. To summarize, the common challenges encountered in heat treating titanium alloys include managing reactivity with oxygen, nitrogen, and hydrogen, minimizing alpha-case formation, achieving the appropriate temperature range, controlling heating and cooling rates, and dealing with the expenses associated with specialized equipment and processes. Overcoming these challenges is essential to obtain high-quality titanium alloy components with the desired properties.

Q: What are the different applications of special steel in the construction industry?: Special steels have a wide range of uses in the construction industry, serving as versatile materials. Structural components are one of the main applications of special steel in construction. Buildings, bridges, and infrastructure projects that require exceptional strength and durability often use special steels, including high-strength low-alloy (HSLA) steel and weathering steel. Apart from structural uses, special steel is extensively employed in pipeline construction. This is particularly significant for oil and gas pipelines, where corrosion resistance and the ability to withstand high-pressure conditions are vital. Stainless steel, for example, is commonly chosen due to its outstanding resistance to corrosion, which makes it ideal for harsh environments. Another important application of special steel in construction is the production of reinforcing bars, also known as rebars. Reinforcing steel bars reinforce concrete structures like buildings, bridges, and highways by adding strength to withstand tension forces. Special steel rebars, such as micro-alloyed steel or carbon steel, are designed specifically to enhance the durability and structural integrity of concrete structures. Furthermore, special steel is extensively used in the construction of high-rise buildings and skyscrapers. The exceptional strength, ductility, and fire resistance properties of special steels like carbon steel or alloy steel make them perfect for constructing tall structures capable of withstanding heavy loads and resisting fire incidents. Special steel also finds application in the construction of equipment and machinery used in the construction industry. For instance, high-speed steel (HSS) is commonly utilized in manufacturing cutting tools, drill bits, and saw blades, which are essential for various construction activities. HSS possesses exceptional hardness, wear resistance, and high-temperature strength, making it suitable for heavy-duty cutting and drilling applications. In conclusion, special steel is an essential material in the construction industry due to its superior strength, durability, corrosion resistance, and fire resistance properties. It serves various purposes in structural components, pipelines, reinforcing bars, high-rise buildings, and construction machinery. Special steel ensures the safety, longevity, and reliability of construction projects, making it indispensable in the industry.

Q: How is case-hardening steel used in the manufacturing of gears?: Case-hardening steel is used in the manufacturing of gears to increase their hardness and durability. This process involves adding a thin layer of hard and wear-resistant material on the surface of the gear, while maintaining a tougher and more flexible core. The case-hardened gears can withstand higher loads, resist wear and fatigue, and have a longer lifespan, making them ideal for demanding industrial applications.

Q: What are the main advantages of using special steel in the defense industry?: The main advantages of using special steel in the defense industry are its exceptional strength, durability, and resistance to corrosion. Special steel is able to withstand extreme conditions and high impact forces, making it ideal for producing armor, weapons, and military vehicles. Additionally, its resistance to corrosion ensures that the equipment remains functional even in harsh environments, increasing its longevity and reliability.

Q: What are the different forging techniques for special steel?: There are several different forging techniques used for special steel, including open die forging, closed die forging, and ring rolling. Open die forging involves shaping the steel between flat dies or anvils, while closed die forging uses shaped dies to compress the steel into the desired shape. Ring rolling involves shaping the steel by rolling it between two or more dies, creating a seamless ring shape. Each forging technique has its own advantages and is chosen based on the specific requirements of the steel product being produced.

Q: What are the requirements for special steel used in industrial equipment manufacturing?: To ensure the suitability of special steel for use in demanding applications in industrial equipment manufacturing, certain requirements must be met. These requirements include: 1. Exceptional strength: Given the heavy loads that industrial equipment often encounters, special steel must possess superior strength properties to withstand these forces. It should exhibit high levels of yield strength, tensile strength, and hardness to prevent deformation or failure. 2. Resistance to corrosion: Industrial environments are frequently subject to corrosion caused by exposure to chemicals, moisture, or extreme temperature fluctuations. Therefore, special steel used in such applications should possess excellent corrosion resistance to prevent degradation and ensure long-term performance. 3. High resistance to wear: The friction, abrasion, and impact experienced by industrial equipment often lead to significant wear. Consequently, special steel needs to exhibit exceptional wear resistance to maintain its integrity and prevent premature failure. 4. Toughness and resistance to impact: Industrial settings can subject equipment to sudden shocks, impacts, or vibrations. To withstand such events, special steel should demonstrate good toughness and resistance to impact, absorbing energy and resisting fracture or cracking. 5. Ability to withstand high temperatures: Certain industrial processes expose equipment to high temperatures or rapid temperature changes. Special steel must exhibit excellent heat resistance, retaining its strength, hardness, and other mechanical properties even at elevated temperatures. 6. Ease of machining: Special steel used in industrial equipment manufacturing should be easy to machine, facilitating the fabrication process. It should allow for simple cutting, drilling, welding, and other machining operations without excessive tool wear or damage to the material. 7. Dimensional stability: Equipment components must maintain their shape and dimensions under various operating conditions. Special steel needs to exhibit dimensional stability to prevent warping, distortion, or dimensional changes that could impact the performance or assembly of the equipment. By meeting these requirements, special steel used in industrial equipment manufacturing can endure harsh conditions, deliver reliable performance, and have a long service life. Ultimately, this contributes to the overall efficiency and productivity of industrial processes.

Q: How does special steel perform in terms of hardness?: Special steel typically performs very well in terms of hardness. It has a higher hardness level compared to regular steel due to the addition of various alloying elements during its production. This enhanced hardness allows special steel to withstand wear, abrasion, and deformation better than other types of steel. It also enables special steel to be suitable for specialized applications that require high strength and resistance to impact or pressure.

FORWARD is specialized in special steel, die steel, including: plastic die steel, hot work steel, cold work steel, alloy structural steel, bearing steel, high speed tool steel, carbon steel, stainless steel and so on with different specification. We sincerely provide high quality and favourite price. Our company keeps the principle of “reputation is fisrt, customer is our god”. Honest, pragmatic spirit are directing our production and sale, in order to serve our valued customer with convenient, top speed and best from here.

1. Manufacturer Overview

Location	Guangdong, China
Year Established	2005
Annual Output Value	Above US$ 100 Million
Main Markets	korea, India, Malaysia, Brazil, Germany, Belgium, Middle East
Company Certifications

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Guangzhou
Export Percentage	50%-80%
No.of Employees in Trade Department	21-100 People
Language Spoken:	English; Chinese
b) Factory Information
Factory Size:	23,000 square meters
No. of Production Lines	1
Contract Manufacturing	OEM servise offered
Product Price Range	high; average