Special Steel 40cr Steel Mould Steel Bar

Special Steel 40cr Steel Mould Steel Bar

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(GB)%

C	Si	Mn	Cr	Ni
0.37-0.44	0.17-0.37	0.50-0.80	0.80-1.10	≤0.30

Heat Treatment

Item	Temperature ℃	Hardness
Normalizing	850-870	179-229HB

Characterstics: Which has the best comprehensive mechanical properties

Applications

1.Can be used for drawing die and plastic mould
2.Can be used for middle and small punch

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Special Steel 40cr Steel Mould Steel Bar

Shipping

1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

Delivery Time: 3-7 days for samples; 5-25 days for batch goods.

Payment Terms

1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.

2.MOQ: 1pcs

3.Warranty : 3 years

4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)

2)as customer's requirement

Why choose us?

(1) The leading exporter in China special steel industry.

(2) Large stocks for various sizes, fast delivery date.

(3) Good business relationship with China famous factories.

(4) More than 7 years steel exporting experience.

(5) Good after-sales service guarantee.

Q: What are the main elements in special steel alloys?: The main elements in special steel alloys vary depending on the specific alloy, but commonly include elements such as chromium, nickel, molybdenum, and vanadium. These elements are added to enhance the properties of steel, such as corrosion resistance, strength, hardness, or heat resistance, making them suitable for specific applications in industries such as aerospace, automotive, and construction.

Q: How does special steel perform under high-temperature conditions?: Special steel is specifically engineered to excel in high-temperature scenarios, showcasing impressive resistance against thermal expansion, oxidation, and creep. This enables the steel to uphold its structural integrity and mechanical properties when exposed to elevated temperatures. The exceptional performance of special steel can be attributed to its distinctive composition, often consisting of elements like chromium, nickel, and molybdenum. These alloying components create a protective oxide layer called passivation on the steel's surface, acting as a barrier against corrosion and further enhancing its ability to withstand high temperatures. Moreover, the microstructure of special steel is meticulously regulated through various heat treatment processes, including quenching and tempering, to attain optimal toughness and strength even in elevated temperature conditions. Consequently, special steel offers outstanding reliability and performance in high-temperature environments, making it the preferred choice for applications in power generation, aerospace, and petrochemical industries.

Q: Can special steel be used in the transportation industry?: Yes, special steel can be used in the transportation industry. Special steel alloys, such as stainless steel and high-strength steel, offer superior strength, corrosion resistance, and durability, making them suitable for various applications in transportation. These steels are commonly used in the production of automotive components, aircraft parts, railway infrastructure, and ships, enhancing safety and performance in the transportation sector.

Q: What are the properties of corrosion-resistant alloy steel?: Corrosion-resistant alloy steel possesses properties such as high resistance to corrosion, excellent strength, durability, and the ability to withstand harsh environmental conditions. It is resistant to rust, corrosion, and oxidation, making it ideal for applications in industries such as marine, chemical, and oil and gas. The alloy steel also offers good mechanical properties, including high tensile strength and toughness, which ensures its long-term performance and reliability.

Q: What are the different methods of surface anodizing for special steel?: There are several methods of surface anodizing for special steel, including electrochemical anodizing, plasma electrolytic oxidation (PEO), and chromic acid anodizing. Each method has its own advantages and suitability for different steel types and desired outcomes. Electrochemical anodizing involves immersing the steel in an electrolyte solution and applying an electric current to form an oxide layer on the surface. PEO utilizes a high-voltage electrical discharge to create a thicker and more durable anodized layer. Chromic acid anodizing, on the other hand, utilizes a mixture of chromic acid and sulfuric acid to achieve corrosion protection and improved surface properties. The choice of method depends on the specific requirements and characteristics of the special steel being anodized.

Q: How is martensitic steel used in knife making?: Martensitic steel is commonly used in knife making due to its high hardness and excellent edge retention properties. Its ability to be heat treated and tempered makes it ideal for creating sharp and durable knife blades. The steel's fine grain structure allows for precise and detailed work, resulting in high-quality and long-lasting knives.

Q: What are the characteristics of tool steel?: Tool steel is a type of steel that possesses exceptional hardness, strength, and wear resistance, making it ideal for manufacturing various tools. It typically contains high levels of carbon, along with other alloying elements like chromium, vanadium, and tungsten. Tool steel also exhibits good toughness, heat resistance, and ability to retain sharpness. Additionally, it can be hardened and tempered to achieve desired properties for specific applications.

Q: What are the different surface cleaning methods used for special steel?: There are several surface cleaning methods that can be used for special steel, depending on the specific requirements and the level of cleanliness desired. Some of the commonly used methods include: 1. Mechanical Cleaning: This method involves the use of abrasive materials or tools to physically remove dirt, rust, and other contaminants from the surface of the steel. It can be done through processes such as sanding, wire brushing, or abrasive blasting. 2. Chemical Cleaning: Chemical cleaning involves the use of chemical agents to dissolve or loosen dirt, grease, oil, or rust from the surface of the steel. Different types of chemicals can be used depending on the type and severity of the contaminants. Acid pickling is one such method that involves immersing the steel in an acid solution to remove scale and rust. 3. High-pressure Water Cleaning: This method utilizes the force of high-pressure water jets to remove dirt, grease, and other contaminants from the surface of the steel. It is effective in removing loose particles and can be used as a pre-cleaning step before other surface preparation methods. 4. Ultrasonic Cleaning: Ultrasonic cleaning is a non-abrasive method that uses high-frequency sound waves to create microscopic bubbles in a cleaning solution. These bubbles implode upon contact with the surface of the steel, effectively removing contaminants from hard-to-reach areas. 5. Electrochemical Cleaning: This method involves passing an electric current through a cleaning solution or electrolyte to facilitate the removal of contaminants from the steel surface. It is useful in removing rust and restoring the steel's appearance. 6. Thermal Cleaning: Thermal cleaning methods, such as flame cleaning or heat treatment, involve subjecting the steel to high temperatures to burn off organic contaminants or to induce controlled oxidation and subsequent removal of scale, rust, or other surface impurities. It is important to note that the choice of surface cleaning method depends on various factors, including the type of contaminants, the condition of the steel, the desired level of cleanliness, and the overall application requirements. A combination of different methods may be used to achieve the best results.

Q: What are the different heat treatment defects in special steel?: There are several heat treatment defects that can occur in special steel during the heat treatment process. Some of the most common defects include: 1. Decarburization: This occurs when the surface layers of the steel lose carbon due to exposure to high temperatures in an oxygen-rich environment. Decarburization can lead to reduced hardness and strength in the treated steel. 2. Quench cracking: Also known as cracking during quenching, this defect occurs when the steel undergoes rapid cooling after being heated. The differential cooling rates can cause internal stresses, leading to cracks in the material. 3. Distortion: Distortion refers to the change in shape or dimension of the steel during the heat treatment process. It can occur due to non-uniform heating or cooling, inadequate fixturing, or improper quenching techniques. 4. Soft spots: Soft spots are localized areas of reduced hardness in the treated steel. These spots can occur due to insufficient heating or improper quenching, leading to reduced mechanical strength in those areas. 5. Overheating: Overheating is a defect that occurs when the steel is exposed to excessively high temperatures during the heat treatment process. This can result in grain growth, reduced toughness, and decreased overall material properties. 6. Case hardening problems: Special steels often undergo case hardening processes, such as carburizing or nitriding, to create a hard outer layer. However, several defects can occur during these processes, including insufficient or excessive hardening, poor case depth, or uneven hardness distribution. 7. Residual stresses: Residual stresses are internal stresses that remain in the steel after the heat treatment process. These stresses can lead to dimensional instability, warping, or even cracking if not properly controlled. To avoid or minimize these heat treatment defects, it is crucial to follow proper heat treatment procedures, including precise temperature control, adequate cooling rates, and appropriate fixturing techniques. Additionally, using high-quality heat treatment equipment, monitoring the process closely, and conducting thorough inspections can help detect and address any potential defects in special steel.

Q: What are the different construction grades of special steel?: There are several different construction grades of special steel that are used in various industries and applications. These grades are specifically designed to provide superior strength, durability, and resistance to corrosion and other environmental factors. Some of the commonly known construction grades of special steel include: 1. Mild Steel: This is the most basic and widely used grade of special steel in construction. It has a low carbon content, making it easy to work with and weld. Mild steel is suitable for applications that require moderate strength and durability. 2. High-Strength Low-Alloy (HSLA) Steel: HSLA steel is a type of special steel that contains small amounts of alloying elements, such as copper, nickel, and vanadium. This grade offers higher strength and improved formability compared to mild steel. It is commonly used in structural applications where a higher strength-to-weight ratio is required. 3. Weathering Steel: Also known as Cor-Ten steel, weathering steel is a special grade that forms a protective layer of rust when exposed to the elements. This layer acts as a barrier against further corrosion, making it ideal for outdoor structures. Weathering steel is commonly used in bridges, buildings, and other architectural applications. 4. Stainless Steel: Stainless steel is a corrosion-resistant alloy that contains a minimum of 10.5% chromium. It offers excellent resistance to corrosion, heat, and chemicals, making it suitable for a wide range of construction applications. Stainless steel is commonly used in building facades, roofing, and structural components. 5. Tool Steel: Tool steel is a special grade that is specifically designed for making tools, dies, and molds. It has high hardness, wear resistance, and toughness properties, making it suitable for applications that require cutting, shaping, and forming of materials. 6. Alloy Steel: Alloy steel is a special grade that contains additional alloying elements, such as manganese, silicon, nickel, and chromium. This grade offers improved strength, toughness, and wear resistance compared to carbon steel. Alloy steel is commonly used in the construction of machinery, equipment, and components subjected to high stress and wear. These are just a few examples of the different construction grades of special steel. Each grade has its own unique properties and is chosen based on the specific requirements of the application.

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