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: What are the properties of leaded steel?: Leaded steel is a type of steel that contains a small amount of lead, typically between 0.15% to 0.35% by weight. The addition of lead improves the machinability of the steel, making it easier to cut and shape. Leaded steel also has excellent lubricity, reducing friction and wear during machining operations. However, it is important to note that leaded steel may have reduced mechanical properties such as strength and toughness compared to non-leaded steels. Additionally, the presence of lead can have environmental and health implications, so proper handling and disposal measures need to be taken.

Q: How does special steel perform in cryogenic creep resistance?: Special steel is known for its exceptional performance in cryogenic creep resistance. Cryogenic creep refers to the deformation that occurs in materials under constant stress at extremely low temperatures. Special steel, due to its unique composition and manufacturing processes, exhibits superior resistance to this type of deformation compared to other materials. The low temperature environment encountered in cryogenic applications can cause conventional materials to lose their strength and become more susceptible to creep deformation. However, special steel is specifically designed to withstand these challenging conditions. Its composition typically includes a higher proportion of alloying elements such as nickel, chromium, and molybdenum, which enhance its mechanical properties and improve its resistance to creep at cryogenic temperatures. Furthermore, special steel undergoes rigorous heat treatment and processing techniques to optimize its microstructure and strengthen its grain boundaries. This results in a material with improved strength, toughness, and resistance to creep deformation, even at extremely low temperatures. The exceptional performance of special steel in cryogenic creep resistance makes it highly suitable for applications that involve storage, transportation, or processing of materials at cryogenic temperatures. Industries such as aerospace, energy, and scientific research heavily rely on special steel for the construction of cryogenic storage tanks, superconducting magnets, and cryogenic valves, among others. In conclusion, special steel exhibits remarkable performance in cryogenic creep resistance due to its unique composition, heat treatment, and processing techniques. Its ability to maintain its mechanical properties and resist deformation at extremely low temperatures makes it an ideal choice for various cryogenic applications.

Q: How is high-temperature steel used in the production of furnace components?: High-temperature steel is extensively used in the production of furnace components due to its exceptional heat resistance. It allows furnace components to withstand the extreme temperatures and harsh conditions encountered during the heating process. This steel is specifically designed to maintain its strength, shape, and structural integrity even at elevated temperatures, ensuring the longevity and efficiency of furnace operation.

Q: How is special steel used in the production of conveyor belts?: Special steel is used in the production of conveyor belts primarily for their strength and durability. It is commonly used in the construction of belt pulleys and rollers, which are essential components of conveyor systems. The special steel used in these parts ensures that they can withstand heavy loads, resist wear and tear, and maintain their shape and functionality over long periods of use.

Q: Can special steel be used for food processing equipment?: Yes, special steel can be used for food processing equipment. Special steel, such as stainless steel, is commonly used in the food industry due to its excellent corrosion resistance, durability, and hygienic properties. It is resistant to rust, staining, and bacterial growth, making it ideal for food processing equipment where cleanliness and safety are crucial.

Q: What are the different methods for improving the magnetic properties of special steel?: There are several methods for improving the magnetic properties of special steel, including annealing, alloying, and heat treatment. Annealing involves heating the steel to a specific temperature and then slowly cooling it, which helps to refine the grain structure and reduce magnetic losses. Alloying is another method, where specific elements like nickel or cobalt are added to the steel to enhance its magnetic properties. Heat treatment is also commonly used, involving controlled heating and cooling processes to alter the microstructure and improve magnetic performance.

Q: Can special steel be used in the production of springs for watches?: Yes, special steel can be used in the production of springs for watches. Special steel, such as stainless steel or high-carbon steel, is often preferred for making watch springs due to its durability, corrosion resistance, and ability to retain its shape and elasticity over time.

Q: What are the challenges in forming special steel?: Several challenges arise when forming special steel due to its unique characteristics and properties. Some of the primary difficulties include: 1. The high melting point of special steels necessitates the use of specialized equipment and processes for heating and shaping the material. This can result in increased energy consumption and costs. 2. Special steels typically contain various alloyed elements to enhance their properties, such as strength, hardness, and corrosion resistance. However, controlling the alloy composition precisely can be challenging, as even minor variations can have a significant impact on the material's properties. 3. Certain special steels, such as tool steels, have a high carbon content to improve hardness and wear resistance. Unfortunately, this high carbon content makes the material more susceptible to cracking during forming processes like forging or rolling. Great care must be taken to prevent cracks and achieve the desired shape. 4. Special steels often require specific heat treatment processes, like quenching and tempering, to achieve the desired mechanical properties. These processes can be complex and require precise control of temperature, time, and cooling rates. Improper heat treatment can result in poor material performance or even structural failure. 5. Achieving the necessary surface finish and dimensional accuracy is crucial in applications where special steels are used, such as the aerospace or automotive industry. This can be challenging during forming operations, necessitating advanced tooling and precision machining techniques. 6. Forming special steels may require specialized equipment and expertise, such as high-pressure hydraulic presses, induction heating equipment, or vacuum furnaces. These specialized tools and processes add complexity and costs to the manufacturing process. Despite these challenges, forming special steels is vital in various industries that require their unique properties. Manufacturers continually invest in research and development to overcome these challenges and enhance the forming processes of special steels.

Q: How does silicon affect the characteristics of special steel?: Silicon can significantly impact the characteristics of special steel. When added in appropriate amounts, silicon enhances the steel's strength, hardness, and resistance to corrosion. It also improves the steel's ability to withstand high temperatures, making it suitable for applications in the aerospace, automotive, and electrical industries. Additionally, silicon aids in deoxidizing the steel, resulting in improved weldability and reduced defects during the manufacturing process.

Q: How does special steel perform in pharmaceutical applications?: Special steel performs well in pharmaceutical applications due to its excellent corrosion resistance, high strength, and ability to withstand extreme temperatures. It ensures the integrity and purity of pharmaceutical products by preventing contamination, thereby maintaining the quality and safety of drugs. Additionally, special steel's ease of cleaning and sterilization makes it an ideal choice for pharmaceutical equipment and machinery.

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