Hot Rolled Structural Steel Round Bar 25MoCr4/1.7325

Hot Rolled Structural Steel Round Bar 25MoCr4/1.7325

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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The details of our Steel

1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard

2. Produce processes: Smelt Iron -EAF smelt Billet - ESR smelt Billet -Hot rolled or forged get the steel round bar and plate

3. Heat treatment:

Normalized / Annealed / Quenched+Tempered

4. Quality assurance:

All order we can received Third party inspection, You can let SGS, BV,.. and others test company test and inspect our products before Goods shipping.

Product information

Designation by Standards

Brand Name	LH No.	Mat. No.	DIN	AISI
25MOCR4	782	1.7325	25Mo Cr4	8625

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo
0.25	0.30	0.70	0.50	0.50

Description
Steel intended for direct hardening.

Applications
Gear components of all kind, link components, arbors, axles, bolts, bushes, coupling boxes for direct hardening.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 210
Density [g/cm³]: 7.85

Soft Annealing
Heat to 650-700^oC, cool slowly. Intermediate annealing: 650-680^oC.

Carburizing
Temperature: 900-950^oC, water, oil or hot quenching 160-250^oC.

Core Hardening
Temperature: 890-920^oC.

Surface Hardening
Harden from a temperature of 780-820^oC followed by water or oil quenching.

Tempering
Tempering temperature: 150-210^oC.

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Hot Rolled Structural Steel Round Bar 25MoCr4/1.7325

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:How does free-cutting steel improve machinability?: Free-cutting steel improves machinability by containing additional elements, such as sulfur, lead, or phosphorus, which help to break the chips and aid in chip removal during the machining process. These elements act as lubricants, reducing friction and heat generation, which results in improved surface finish and reduced tool wear.

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.

Q:What are the machining techniques for special steel?: Some of the machining techniques commonly used for special steel include milling, turning, drilling, grinding, and broaching. These techniques are employed to shape and finish the special steel material according to the desired specifications and requirements. Additionally, special attention is given to selecting appropriate cutting tools, speeds, and feeds to ensure efficient and precise machining.

Q:What are the different methods of surface honing for special steel?: Surface honing for special steel can be achieved through various methods, each with its own benefits and uses. Among the commonly employed techniques are: 1. Manual Honing: This approach entails the utilization of handheld honing tools, such as stones, sticks, or abrasive pads, to manually remove material from the steel's surface. Manual honing permits meticulous control and is often suitable for smaller or intricate components. 2. Machine Honing: Machine honing involves the use of specialized honing machines that automate the honing process. These machines typically feature rotating honing stones or abrasive belts, which eliminate material from the steel's surface. Machine honing is favored for larger or complex parts, as it ensures consistent and high-quality outcomes. 3. Diamond Honing: Diamond honing relies on diamond abrasives to eradicate material from the special steel's surface. Given that diamond is one of the hardest substances known, it is exceptionally effective for honing steel. This method is commonly employed in high-precision applications or instances where an exceedingly smooth surface finish is required. 4. Superfinishing: Superfinishing is a specialized honing process that achieves extremely fine surface finishes on special steel. It combines honing stones and abrasive pastes to remove minuscule amounts of material from the surface. Superfinishing is typically utilized in critical applications where surface roughness and dimensional accuracy are of utmost importance. 5. Lapping: Lapping is a honing method that employs a combination of abrasive particles and a rotating or vibrating tool to eliminate material from the steel's surface. It is particularly suitable for parts necessitating a very flat or parallel surface, such as bearings or sealing surfaces. 6. Electrochemical Honing: Electrochemical honing is a specialized process that employs an electric current to remove material from the special steel's surface. It is often employed for intricate or hard-to-reach surfaces, as it effectively eliminates material from areas inaccessible to other honing methods. To sum up, the various methods of surface honing for special steel encompass manual honing, machine honing, diamond honing, superfinishing, lapping, and electrochemical honing. Each method offers distinct advantages and applications, enabling precise control and the attainment of desired surface finishes and dimensional accuracy for special steel components.

Q:Can special steel be used in marine environments?: Yes, special steel can be used in marine environments. Special steel alloys, such as stainless steel or corrosion-resistant steel, are specifically designed to withstand the harsh conditions of saltwater and other corrosive elements found in marine environments. These alloys have excellent resistance to corrosion, erosion, and pitting, making them suitable for various marine applications, including shipbuilding, offshore structures, and marine equipment.

Q:How does special steel contribute to the automotive engine industry?: Special steel plays a crucial role in the automotive engine industry by offering enhanced performance, durability, and efficiency. It is used to manufacture various engine components such as crankshafts, camshafts, connecting rods, and valves, which are subjected to high stress and temperature. The use of special steel ensures these components can withstand the demanding conditions and provide better power, fuel efficiency, and overall engine performance. Additionally, special steel enables engine manufacturers to reduce weight while maintaining structural integrity, contributing to improved fuel economy and reduced emissions.

Q:How does special steel contribute to improving product performance under extreme conditions?: Special steel contributes to improving product performance under extreme conditions by offering superior strength, durability, and resistance to corrosion. Its unique composition and manufacturing techniques enhance its ability to withstand high temperatures, pressure, and harsh environments, ensuring the product's reliability and longevity. Additionally, special steel's exceptional mechanical properties enable it to retain its structural integrity and functionality, even in challenging conditions, ultimately enhancing the overall performance and safety of the end product.

Q:What are the different types of tool steels used in special steel?: Some of the different types of tool steels used in special steel include high-speed steels, cold work steels, hot work steels, and plastic mold steels. Each type of tool steel is designed to have specific properties that make it suitable for different applications, such as cutting, shaping, or molding materials.

Q:What are the environmental impacts of manufacturing special steel?: Manufacturing special steel has significant environmental impacts due to its energy-intensive production process and the extraction of raw materials. The production of special steel requires high temperatures and uses large amounts of fossil fuel-based energy, resulting in substantial greenhouse gas emissions contributing to climate change. Additionally, the extraction of iron ore and other raw materials for steel production can lead to deforestation, habitat destruction, and water pollution. The disposal of steel waste and byproducts also poses challenges, as it can contaminate soil and water sources. Therefore, the environmental impacts of manufacturing special steel must be carefully managed and mitigated through sustainable practices and technologies.

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