Special Steel Hot Rolled SCM440 Material Round Bar

Special Steel Hot Rolled SCM440 Material Round Bar System 1

Special Steel Hot Rolled SCM440 Material Round Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Chemical Element for JIS SCM440 round alloy steel bar

Standard	Grade Number
GB	42CrMo	C	Si	Mn	P	S	Cr	Ni	Mo	Cu
ASTM	4140	0.36-0.44	0.10-0.40	0.65-1.10	≤0.04	≤0.04	0.75-1.20	-	0.15-0.35	≤0.030
DIN	42CrMo4 1.7225	0.35-0.44	0.15-0.30	0.70-0.90	≤0.035	≤0.04	0.80-1.10	-	0.15-0.25	≤0.025
JIS	SCM440	0.38-0.42	0.15-0.35	0.60-0.85	≤0.03	≤0.03	0.9-1.20	≤0.25	0.15-0.30	≤0.30

Physical Properties for JIS SCM440 round alloy steel bar

Physical Properties
Tensile Strength (MPa)		≥1080(110)
Yield strength(MPa)		≥930(95)
Elongation(%)		≥12
Reduction of area(%)		≥45
Akv (J)		≥63
Impact roughness(J/cm2)		≥78(8)
Hardness		≤217HB
Specimen size		25mm

Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil

Heat treatment: Normalized / Annealed / Quenched / tempered

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Special Steel Hot Rolled SCM440 Material Round 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

Main Product

Plastic Mould Steel

DIN 1.2311,1.2738,1.2083,1.2316 etc.

AISI P20,P20+Ni,420 etc.

JIS SUS420J2

Hot Work Steel

DIN 1.2344,1.2343,1.2367,1.2365,1.2581,1.2713 etc.

AISI H13,H11,H10,H21, etc.

JIS SKD61,SKD6,SKD5,SKT4 etc.

Cold Work Steel

DIN 1.2739, 1.2601, 1.2080, 1.2436, 1.2631, 1.263, 1.2510, 1.2327 etc.

AISI D2, D5, D3, D6, A8, A2, O1 etc.

JIS SKD10, SKD11, SKD1, SKS3 etc.

High Speed Steel

DIN 1.3343, 1.3243, 1.3247, 1.3355 etc.

AISI M2, M35, M42, T1 etc.

JIS SKH51, SKH35, SKH59, SKH2 etc.

Alloy Structural Steel

DIN 1.7035,1.6511,1.7220,1.7225 etc.

AISI 5140, 4340, 4135, 4140 etc.

JIS SCr440,SNCM439,SCM435,SCM440 etc.

Stainless & Carbon Steel or Others

DIN 1.4125,1.1191 etc

AISI 440C,1045, 1020 etc.

JIS SUS440C,S45C etc

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 different oil and gas grades of special steel?: There are several different oil and gas grades of special steel that are commonly used in the industry. These grades are specifically designed to withstand the harsh environments and high temperatures associated with oil and gas exploration and production. Some of the most commonly used grades include: 1. API 5CT: This grade is specifically designed for use in casing and tubing applications. It has high strength and excellent resistance to corrosion, making it ideal for use in demanding oil and gas environments. 2. API 5L: This grade is used for pipeline transportation systems in the petroleum and natural gas industries. It has excellent mechanical properties and is designed to withstand high pressure and temperature conditions. 3. NACE MR0175/ISO 15156: This grade is compliant with the NACE MR0175/ISO 15156 standard, which specifies the requirements for the use of metallic materials in oil and gas production environments containing H2S (sour service). These grades have high resistance to sulfide stress cracking and hydrogen-induced cracking. 4. Duplex Stainless Steel: This grade is used in applications where high strength, corrosion resistance, and resistance to stress corrosion cracking are required. It is commonly used in offshore oil and gas production, as well as in subsea equipment. 5. Super Duplex Stainless Steel: This grade offers even higher strength and corrosion resistance than duplex stainless steel. It is commonly used in demanding oil and gas applications, such as subsea and deepwater equipment. These are just a few examples of the different oil and gas grades of special steel available in the market. The selection of the appropriate grade depends on the specific application, operating conditions, and requirements of the project. It is crucial to consult with experts or refer to industry standards and specifications to ensure the right grade is chosen for a particular oil and gas project.

Q:What are the different corrosion testing methods used for special steel?: There are several corrosion testing methods used for special steel, including salt spray testing, electrochemical testing, immersion testing, and accelerated corrosion testing. These methods help to assess the corrosion resistance and durability of special steel in different environments and conditions.

Q:What are the requirements for special steel used in high-strength applications?: To ensure the performance and durability of special steel used in high-strength applications, specific requirements must be met. These requirements encompass various factors: 1. High tensile strength is crucial in withstanding heavy loads and resisting deformation. It enables the steel to endure greater stresses without failure. 2. Excellent toughness is essential as it allows the steel to absorb energy and resist fracture. This prevents sudden and catastrophic failure under impact or dynamic loading conditions. 3. Superior hardness is necessary to resist wear, abrasion, and indentation. It ensures that the material maintains its structural integrity and performance even in extreme conditions. 4. Good ductility is important alongside high tensile strength. It allows the steel to undergo plastic deformation without fracturing, making it suitable for forming or shaping during manufacturing. 5. Resistance to corrosion is vital to prevent degradation caused by moisture, chemicals, or harsh environments. This ensures the longevity and reliability of the steel in various conditions. 6. Heat resistance is required for applications involving high temperatures. It allows the steel to maintain its mechanical properties and structural stability under elevated temperatures. 7. Controlled alloying elements, such as chromium, molybdenum, nickel, or vanadium, are often added to enhance the steel's strength, toughness, hardness, and other desired properties. 8. Precise composition and microstructure are necessary to ensure consistent and predictable mechanical properties. This can be achieved through precise manufacturing processes like controlled cooling rates or heat treatments. By meeting these requirements, special steel used in high-strength applications can endure the demanding conditions it faces, providing reliable performance, longevity, and safety.

Q:What are the different methods of surface passivation for special steel?: There are several methods of surface passivation for special steel, including chemical passivation, electrochemical passivation, and mechanical passivation. Chemical passivation involves treating the surface with chemicals to remove impurities and create a protective layer. Electrochemical passivation uses an electric current to form a passive oxide layer on the surface. Mechanical passivation involves physical processes such as polishing or shot peening to remove contaminants and improve surface quality. These methods help enhance the corrosion resistance and durability of special steel surfaces.

Q:How does special steel perform in nuclear applications?: Special steel performs exceptionally well in nuclear applications due to its unique properties. It has high strength, excellent corrosion resistance, and exceptional temperature resistance, making it ideal for containing and transporting radioactive materials. Special steel also maintains its structural integrity even under extreme conditions, such as high radiation levels and elevated temperatures, thus ensuring the safety and reliability of nuclear facilities. Additionally, its excellent weldability and formability allow for precise fabrication, enabling the construction of complex nuclear components. Overall, special steel plays a crucial role in enhancing the efficiency, durability, and safety of nuclear applications.

Q:What are the requirements for special steel used in high-pressure applications?: Special steel used in high-pressure applications must meet certain requirements in order to ensure its durability and reliability under extreme conditions. Some of the key requirements for this type of steel include: 1. High strength: Special steel for high-pressure applications needs to have exceptional strength to withstand the intense forces and pressures it will be subjected to. This allows it to resist deformation and maintain its structural integrity. 2. Excellent corrosion resistance: The steel must have a high resistance to corrosion, as it will often come into contact with aggressive fluids or gases in high-pressure environments. This prevents the steel from deteriorating over time and helps to maintain its performance and longevity. 3. Good weldability: Special steel used in high-pressure applications should possess good weldability to enable easy and efficient joining of different components. This ensures the overall integrity and reliability of the system. 4. High temperature resistance: The steel must have the ability to withstand elevated temperatures without losing its mechanical properties. This is particularly important in applications where high-pressure fluids or gases are heated or where the steel is exposed to extreme heat sources. 5. Fatigue resistance: Special steel should have a high resistance to fatigue failure, as it will often be subjected to cyclic loading and pressure fluctuations. This allows the steel to withstand repeated stress and pressure cycles without developing cracks or failures. 6. Tight dimensional tolerance: The steel should have tight dimensional tolerance to ensure proper fit and functionality within the high-pressure system. This helps to minimize leakage or any potential weak points in the system. 7. Compliance with industry standards: Special steel used in high-pressure applications should meet relevant industry standards and specifications, such as those set by organizations like the American Society of Mechanical Engineers (ASME) or the American Petroleum Institute (API). This ensures that the steel meets the required quality and performance standards. Overall, special steel for high-pressure applications needs to possess a combination of high strength, excellent corrosion resistance, good weldability, high temperature resistance, fatigue resistance, tight dimensional tolerance, and compliance with industry standards to ensure its suitability and reliability in demanding environments.

Q:How does stainless steel contribute to the production of medical implants?: Stainless steel contributes to the production of medical implants by providing a highly durable and corrosion-resistant material that is compatible with the human body. It is used in various implants such as joint replacements, dental implants, and surgical instruments due to its strength, biocompatibility, and ability to withstand sterilization processes.

Q:What are the properties of magnesium alloys?: Magnesium alloys exhibit a combination of desirable properties, including low density, high strength-to-weight ratio, good corrosion resistance, excellent machinability, and high thermal conductivity. They also possess good damping capacity, making them suitable for applications requiring vibration reduction. Additionally, magnesium alloys can be easily cast, forged, and welded, allowing for a wide range of manufacturing processes. However, they are prone to ignite under certain conditions and can be more expensive compared to other metals.

Q:How does special steel contribute to reducing product waste during manufacturing?: Special steel contributes to reducing product waste during manufacturing by offering superior strength, durability, and corrosion resistance. Its unique properties allow manufacturers to produce components that are longer-lasting and more resistant to wear and tear. This reduces the need for frequent replacements or repairs, ultimately minimizing product waste and increasing overall efficiency in the manufacturing process.

Q:How is magnetic alloy steel used in the production of magnetic components?: Magnetic alloy steel is used in the production of magnetic components due to its unique magnetic properties. It is commonly used to make permanent magnets, such as those found in electric motors, generators, and transformers. The alloy's high magnetic permeability and saturation induction make it ideal for creating strong magnetic fields. Additionally, its resistance to demagnetization and ability to retain magnetism at high temperatures make it suitable for various applications in industries like automotive, aerospace, and electronics.

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