Special Steel 42CrMo/1.7225 Working Mould Steel

Special Steel 42CrMo/1.7225 Working Mould Steel

Ref Price:: $300.00 - 500.00 / m.t.

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(%)

C	Si	Mn	Cr	Mo	Ni	P	S
0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.20	0.15-0.25	≤0.030	≤0.030	≤0.030

Standard

GB	AISI	DIN	JIS	ISO
42CrMo	4140	42CrMo4	SCM440	42CrMo4

Available Size

Rolled round bar	φ20-120mm × L
Forged round bar	φ130-195mm × L

Heat Treatment

Item	Temperature℃	Hardness
quenching	840-880	HRC32-34
tempering	580	HRC32-34
quenching	900	HRC54-60
tempering	150-180	HRC54-60

Applications: The steel is suitable for manufacturing requires a certain strength and toughness of large and medium-sized plastic mold

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Special Steel 42CrMo/1.7225 Working Mould Steel

Q: How does tool and die steel maintain its hardness and wear resistance?: Tool and die steel maintains its hardness and wear resistance through a combination of factors such as its chemical composition, heat treatment, and surface treatments. The steel is typically alloyed with elements like chromium, vanadium, and tungsten, which enhance its hardness and wear resistance properties. Additionally, through heat treatment processes like quenching and tempering, the steel is subjected to controlled heating and cooling cycles, which further contribute to its desired hardness and toughness. Surface treatments like nitriding or coating with materials like titanium nitride can also be applied to improve the wear resistance of the steel. Overall, it is the careful selection of steel composition, precise heat treatment, and appropriate surface treatments that enable tool and die steel to maintain its hardness and wear resistance.

Q: What are the different tool steel alloys?: Tool steel is a type of carbon and alloy steel that is specifically designed for the production of tools, dies, and cutting applications. There are several different tool steel alloys available, each with its own unique properties and characteristics. 1. Carbon Tool Steels: These steels contain a higher carbon content, usually ranging from 0.60% to 1.00%. They offer excellent hardness, wear resistance, and toughness, making them suitable for cutting and forming tools. 2. High-Speed Tool Steels: These steels are specifically designed to withstand high temperatures and maintain their hardness and strength at elevated speeds. They typically contain various alloying elements such as tungsten, molybdenum, and vanadium. 3. Shock-Resistant Tool Steels: As the name suggests, these steels are designed to withstand high impact or shock loads without fracturing. They offer excellent toughness and are commonly used for chisels, hammers, and other tools subjected to intense impact forces. 4. Hot-Work Tool Steels: These steels are engineered to retain their hardness and strength at high temperatures, making them ideal for applications involving hot forming or forging processes. They exhibit excellent thermal conductivity and wear resistance. 5. Cold-Work Tool Steels: These steels are specifically designed for applications involving cutting, shearing, and forming at room temperature or lower. They possess high hardness, wear resistance, and toughness, enabling them to withstand the stresses associated with cold-working operations. 6. Mold Steels: Mold steels are primarily used in the production of molds for plastic injection molding, die casting, and extrusion processes. They offer good machinability, high wear resistance, and excellent dimensional stability. 7. Stainless Tool Steels: Stainless tool steels combine the corrosion resistance of stainless steel with the hardness and toughness of tool steel. They are commonly used in applications where both wear resistance and corrosion resistance are required. These are just a few examples of the different tool steel alloys available in the market. Each alloy has its own specific properties and applications, allowing manufacturers to select the most suitable tool steel for their specific needs.

Q: How does special steel contribute to the food processing aftermarket industry?: The food processing aftermarket industry greatly benefits from the use of special steel, as it offers a multitude of advantages that enhance overall efficiency, safety, and productivity. To begin with, special steel is renowned for its remarkable resistance to corrosion. This is particularly crucial in the food processing industry, where equipment frequently encounters acidic and corrosive substances. By utilizing special steel, machinery remains impervious to rust and contamination. As a result, the hygiene and quality standards of food processing operations are maintained, thereby reducing the risk of foodborne illnesses and contamination. Moreover, special steel exhibits exceptional strength and durability, enabling food processing equipment to withstand the demanding conditions of heavy usage and continuous operations. The robustness of special steel ensures the reliability of equipment, minimizing the likelihood of breakdowns or malfunctions during critical production processes. Consequently, operational efficiency is increased, downtime is reduced, and production output is improved. Furthermore, special steel can be customized to suit specific applications, allowing manufacturers to design and produce equipment that meets the unique requirements of the food processing industry. Special steel alloys can be tailored to possess specific properties, such as heat resistance, wear resistance, or hardness, depending on the specific processing needs. This adaptability guarantees that equipment can handle different types of food products, processing techniques, and operating conditions, resulting in enhanced versatility and adaptability within the food processing aftermarket industry. Additionally, special steel is compatible with various cleaning and sterilization processes, making it ideal for food processing equipment. The material can endure high-temperature cleaning methods, such as steam or chemical cleaning, without deteriorating or compromising its structural integrity. This ease of cleaning and sterilization contributes to maintaining the highest standards of hygiene and sanitation within the food processing industry. In conclusion, special steel's resistance to corrosion, strength, durability, customization options, and compatibility with cleaning processes make it an invaluable material within the food processing aftermarket industry. Its contribution to equipment reliability, hygiene, and productivity ensures that food processing operations can meet the stringent quality and safety standards required in this sector.

Q: How does special steel contribute to the corrosion resistance of products?: By incorporating specific alloying elements, special steel enhances its ability to withstand corrosion and contributes to the corrosion resistance of products. These alloying elements, such as chromium and nickel, create a protective layer known as a passive film on the steel's surface. This passive film acts as a barrier, preventing the penetration of oxygen and moisture to the underlying metal, thus reducing the chances of corrosion. Special steel contains high levels of chromium, which enables the formation of a dense and stable chromium oxide layer on the surface. This layer acts as a physical barrier, preventing the diffusion of corrosive agents and inhibiting rust formation. Additionally, the presence of nickel in the alloy further improves the steel's corrosion resistance by promoting the formation of a more uniform and adherent passive film. Furthermore, special steel can undergo specific treatments or processes to enhance its corrosion resistance. Techniques like heat treatment and surface coating can modify the steel's structure and composition, facilitating the formation of more stable passive films and reducing susceptibility to corrosion. These treatments also improve the steel's mechanical properties, making it more durable and resistant to external factors that may lead to corrosion. In conclusion, the utilization of special steel in various products enhances their resistance to corrosion through the incorporation of alloying elements and the application of specific treatments that encourage the formation of protective passive films. This, in turn, extends the lifespan of the products and ensures their performance and integrity, even in harsh and corrosive environments.

Q: What are the requirements for special steel used in surgical instruments?: The requirements for special steel used in surgical instruments are quite stringent due to the critical nature of their application in medical procedures. First and foremost, the steel must have excellent corrosion resistance to withstand the repeated exposure to body fluids and chemicals used in sterilization processes. This ensures that the instruments remain durable, hygienic, and safe for use. Another essential requirement is high strength and hardness, as surgical instruments must be able to withstand the forces exerted during procedures without bending, breaking, or losing their sharpness. Additionally, the steel should possess excellent wear resistance to maintain its cutting edge for an extended period, reducing the need for frequent sharpening or replacement. Biocompatibility is another crucial factor for surgical instruments. The steel should not cause any adverse reactions when in contact with living tissue or fluids, minimizing the risk of infection or complications for patients. This requires the absence of harmful elements or impurities that may trigger allergic responses or toxicity. Furthermore, the steel used in surgical instruments must be highly sterilizable. It should be capable of withstanding high temperatures during autoclaving or other sterilization methods without undergoing significant changes in its physical or mechanical properties. Lastly, the steel should be easily workable, allowing for precision manufacturing processes such as forging, machining, and polishing to create intricate instrument designs. This ensures that surgical instruments have the necessary shape, size, and surface finish required to perform specific tasks effectively. Overall, the requirements for special steel used in surgical instruments encompass corrosion resistance, strength, hardness, wear resistance, biocompatibility, sterilizability, and workability to ensure the instruments meet the demanding standards of the medical field.

Q: What are the different methods of surface protection for special steel?: Different methods of surface protection for special steel offer unique benefits and are suitable for specific applications. Some commonly used methods are: 1. Galvanization: Zinc coating is applied to the steel, providing excellent corrosion resistance. Hot-dip galvanization or electroplating can be used depending on the requirements. 2. Paint coating: A paint coating is applied to protect the steel from corrosion and environmental factors. The paint acts as a barrier, preventing rust and damage. 3. Powder coating: Dry powder is applied to the steel surface and heated to create a protective layer. This method offers excellent resistance to corrosion, chemicals, and abrasion, making it ideal for harsh conditions. 4. Electroplating: A layer of metal is deposited onto the steel surface through an electrochemical process. This enhances corrosion resistance and may provide additional benefits such as increased hardness or improved aesthetics. 5. Thermal spraying: Material like zinc or aluminum is melted or heated and sprayed onto the steel surface to form a protective coating. Thermal spraying offers excellent corrosion protection and can be used for surface repairs. 6. Ceramic coating: Ceramic coatings are highly resistant to corrosion, abrasion, and high temperatures. They are commonly used in extreme conditions such as the aerospace or automotive industries. 7. Passivation: Chemical process removes free iron and contaminants from the surface of stainless steel. This improves corrosion resistance by forming a passive oxide layer. Choosing the appropriate surface protection method depends on the specific requirements of the steel and its application. Factors such as desired corrosion resistance level, environmental conditions, and desired lifespan should be considered when selecting a method.

Q: How does special steel perform in high-temperature oxidation conditions?: Special steel, otherwise known as heat-resistant or high-temperature steel, is designed specifically to excel in conditions of high-temperature oxidation. At elevated temperatures, oxidation occurs as a chemical reaction between the metal and oxygen, potentially resulting in the degradation or failure of the material due to the formation of metal oxides. Nevertheless, special steel contains alloying elements that offer exceptional resistance to oxidation. These alloying elements, such as chromium, aluminum, and silicon, create a protective layer of oxides on the steel's surface when exposed to high temperatures. This layer acts as a barrier, preventing further oxidation of the underlying metal. Moreover, the alloying elements can promote the formation of stable and adherent oxide scales, further enhancing the steel's resistance to oxidation. The outstanding performance of special steel in high-temperature oxidation conditions can be attributed to several factors. Firstly, the alloying elements in the steel composition ensure the formation of a protective oxide layer, effectively shielding against further oxidation. Secondly, the steel's microstructure is specifically designed to maintain stability and retain its mechanical properties even at elevated temperatures. In addition, special steel undergoes stringent heat treatment processes to enhance its resistance to high-temperature oxidation. Heat treatment methods such as annealing, quenching, and tempering optimize the steel's microstructure and eliminate impurities, guaranteeing optimal performance in extreme conditions. In summary, special steel showcases remarkable resistance to high-temperature oxidation conditions due to its carefully chosen alloying elements, tailored microstructure, and optimized heat treatment processes. It provides a dependable and long-lasting solution for various industries that require materials capable of withstanding severe oxidation environments, ensuring optimal performance and durability in these challenging conditions.

Q: What are the different surface coating techniques for special steel?: There are several surface coating techniques available for special steel, including electroplating, hot-dip galvanizing, powder coating, and thermal spraying. Each technique offers unique benefits and is used depending on the specific requirements of the steel and its intended application. Electroplating involves depositing a layer of metal onto the surface of the steel through an electrochemical process, providing enhanced corrosion resistance. Hot-dip galvanizing, on the other hand, involves immersing the steel in a bath of molten zinc, creating a protective layer that prevents rust and corrosion. Powder coating involves applying a dry powder to the surface of the steel and then heating it to form a durable, attractive coating. Finally, thermal spraying involves applying a coating material, such as metal or ceramic, onto the steel surface using a high-velocity flame or plasma jet, providing protection against wear, corrosion, and high temperatures.

Q: Can special steel be used in the plastic manufacturing industry?: Yes, special steel can be used in the plastic manufacturing industry. Special steel is often used for making molds and dies, which are critical components in the plastic manufacturing process. These molds and dies need to be strong, durable, and able to withstand high temperatures and pressures. Special steel, such as tool steel or stainless steel, can provide the necessary properties to ensure the quality and longevity of plastic manufacturing equipment.

Q: What are the properties of aluminum alloys?: Aluminum alloys possess several properties that make them highly desirable in various industries. These properties include lightweight, excellent corrosion resistance, high strength-to-weight ratio, good formability, and electrical conductivity. Additionally, aluminum alloys can be easily cast, machined, and welded, making them highly versatile in different applications.

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