DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

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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

Chemical Composition(%) of 4140 round steel	C	Si	Mn	P	S	Cr	Mo
	0.38-0.45	≤0.40	0.60-0.90	≤0.035	≤0.035	0.90-1.20	0.15-0.30
Specification of 4140 round steel	Hot Rolled: Dia.(mm)L(mm)=14-2002000-6000
	Forged: Dia.(mm)L(mm)=210-8002000-6000
Application of 4140 round steel	(1) Commonly used for manufacturing 35CrMo higher than the required strength, large parts of the important sectional dimensions, such as axis, gear, connecting rod, transmission gears, the supercharger gear, engine cylinder, spring, spring clamps, 12-2000mm oil pipe fittings, fishing tools and instead of containing nickel steel high. (2) For main shaft of steamer,boly for 400 °C. Hummar shank.
Characteristic of 4140 round steel	(1) Chromium molybdenum high tensile steel with yield strength of 550N/mm2. (2) Chromium renders steel oil hardenable and increase hardenability. (3) Weldability suffers with increasing chromium content. (4) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum. (5) Molybdenum significantly reduces temper brittleness.
Heat Treatment of 4140 round steel	Forging:1100~900°C Normalization:860~880°C Subcritical Annealing:680~720°C Isothermal Annealing:830~900 670x3h°C Hardening:830~860 oil Tempering:550~650°C
Mechanical Properties of 4140 round steel	Tensile str. (N/mm2):1080 Yield point (N/mm2):930 Elongation (%):12 Contraction (%):45 Impack work (J/cm2):63 Hardness (HB):217
Delivery Condition of 4140 round steel	hot rolled, black surface, annealed
Payment Term of 4140 round steel	L/C at sight,T/T,30% in advance,70% before the shipment

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DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

Q:Can special steel be used in the jewelry industry?: Yes, special steel can be used in the jewelry industry. It is commonly used to make durable and versatile jewelry pieces, especially in the production of contemporary and industrial style jewelry. Special steel offers unique design options and can be combined with other materials to create stunning and long-lasting jewelry pieces.

Q:How does special steel contribute to the manufacturing of medical implants?: Special steel plays a vital role in the manufacturing of medical implants by offering superior strength, corrosion resistance, and biocompatibility. These properties are crucial for ensuring the longevity and functionality of implants, allowing them to withstand the harsh conditions within the human body. Additionally, special steel can be shaped and machined into complex forms, enabling the production of intricate and customized implants to meet the specific needs of patients. Overall, special steel is essential for producing high-quality and reliable medical implants that enhance patient outcomes and improve their quality of life.

Q:How does tool steel maintain its hardness at high temperatures?: Tool steel maintains its hardness at high temperatures due to its high carbon content and alloying elements. The high carbon content allows for the formation of carbides, which are extremely hard and stable even at elevated temperatures. Additionally, the alloying elements in tool steel, such as chromium, tungsten, and molybdenum, form secondary carbides that further enhance the steel's hardness and heat resistance. These carbides act as strengthening agents, preventing the steel from losing its hardness and maintaining its performance even under high-temperature conditions.

Q:What are the different powder coating techniques used for special steel?: There are several powder coating techniques used for special steel, including electrostatic spraying, fluidized bed coating, and electrostatic fluidized bed coating. These techniques involve applying a dry powder coating to the steel surface, which is then cured to form a durable and protective layer. Each technique has its own advantages and is used based on the specific requirements of the steel and the desired finish.

Q:How is special steel used in the production of hydraulic components?: Special steel is used in the production of hydraulic components due to its high strength, corrosion resistance, and ability to withstand extreme pressure and temperature conditions. It helps in manufacturing durable and reliable hydraulic parts such as cylinders, valves, fittings, and pistons, ensuring efficient functioning and long-lasting performance of hydraulic systems.

Q:Can special steel be used for structural applications?: Yes, special steel can be used for structural applications. Special steel refers to steel that has been alloyed or modified to possess specific properties such as enhanced strength, durability, or corrosion resistance. These qualities make special steel suitable for various structural applications where high performance and reliability are required, such as in the construction of buildings, bridges, and offshore platforms.

Q:Can special steel be used in tool manufacturing?: Yes, special steel can be used in tool manufacturing. Special steel refers to a category of steel that has specific properties and characteristics that make it suitable for various applications, including tool manufacturing. Special steel is often alloyed with other elements such as chromium, molybdenum, or vanadium to enhance its strength, hardness, and wear resistance. In tool manufacturing, special steel is commonly used for making cutting tools, drills, dies, molds, and other tooling components. Its high strength and hardness allow it to withstand the demanding conditions of cutting, drilling, and shaping various materials. Special steel also offers excellent resistance to wear, heat, and corrosion, making it ideal for tools that need to maintain their sharpness and performance over prolonged use. Moreover, special steel can be further processed and treated through heat treatment techniques such as quenching and tempering to achieve specific hardness levels and improve its overall performance. This versatility makes special steel a preferred choice for tool manufacturers who prioritize durability, precision, and longevity in their products. Overall, special steel has proven to be a reliable and efficient material in tool manufacturing, enabling the production of high-quality tools that meet the needs of various industries, from automotive and aerospace to construction and manufacturing.

Q:How does special steel perform in high-pressure applications?: Special steel performs exceptionally well in high-pressure applications. Its unique properties, such as high strength, excellent corrosion resistance, and good thermal stability, make it an ideal choice for withstanding extreme pressure conditions. It maintains its structural integrity, preventing deformation or failure, even when exposed to intense pressure. Additionally, special steel's resistance to fatigue and wear ensures long-term performance and reliability in high-pressure environments.

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 is mold steel used in injection molding?: Mold steel is used in injection molding to create the molds or tooling that are used to produce plastic parts. The steel is used to form the cavity or core of the mold, which determines the shape of the final product. Mold steel is chosen for its high strength, durability, and heat resistance to withstand the high pressures and temperatures involved in the injection molding process.

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