Special Steel ASTM4140 Alloy Steel Round Bar

Special Steel ASTM4140 Alloy Steel Round Bar System 1

Special Steel ASTM4140 Alloy Steel 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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Product information

1. Grade: 4140,SAE4140, 42CrMo4, 1.7225,SCM440

2. Specification: Dia: 16~800mm Length:2000-13000mm or as required

3. Process: EAF+LF+VD

4. Technique:Forged

5.Treatment:hot rolled,cold drawn

6.Mechanical performance:

Strength of extension	1080MPA
Yield point	930MPA
Elongation	12%
Contractibility rate	45%
Impacting energy	63J

7.Chemical composition(for reference only):

Grade	C	Si	Mn	P≤	S≤	Cr	Mo
SAE4140	0.38/0.43	0.15/0.35	0.75/1.00	0.035	0.035	0.80/1.10	0.15/0.25

8. Compared grades of 4140 steel

GB-China	AISI-America	DIN-GERMANY	JIS-Japan
42CrMo	4140	1.7225 42CrMo4	SCM440

GB-China

AISI-America

DIN-GERMANY

JIS-Japan

42CrMo

4140

1.7225

42CrMo4

SCM440

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Special Steel ASTM4140 Alloy Steel 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

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 requirements for special steel used in oil and gas equipment manufacturing?: The requirements for special steel used in oil and gas equipment manufacturing are quite stringent due to the demanding operating conditions and harsh environments that these materials will be exposed to. Some of the key requirements include: 1. Corrosion Resistance: Special steel used in oil and gas equipment must have excellent resistance to corrosion, especially in the presence of various corrosive fluids such as oil, gas, and saltwater. This helps to prevent degradation and premature failure of the equipment. 2. High Strength: The steel must possess high strength and toughness to withstand the extreme pressures, temperatures, and mechanical stresses encountered in oil and gas operations. This ensures that the equipment can perform reliably under demanding conditions. 3. Heat Resistance: Oil and gas equipment often operates at elevated temperatures, especially in downstream processes such as refining and petrochemical applications. Special steel used in these applications must be able to maintain its mechanical properties and structural integrity even at high temperatures. 4. Weldability: Welding is a common joining technique used in the fabrication of oil and gas equipment. The special steel should have good weldability, allowing for efficient and reliable welding processes without compromising the overall strength and integrity of the equipment. 5. Fatigue Resistance: Oil and gas equipment is subjected to cyclic loading, which can lead to fatigue failure if the material is not properly designed to withstand these repetitive stresses. Special steel must possess good fatigue resistance properties to ensure long-term durability. 6. Low Temperature Properties: In certain applications, such as offshore drilling or arctic environments, the equipment may be exposed to extremely low temperatures. The special steel should exhibit excellent toughness and ductility at low temperatures to prevent brittle fracture. 7. Chemical Composition Control: The chemical composition of the special steel must be tightly controlled to ensure consistent and predictable material properties. This involves strict control over the levels of various alloying elements, impurities, and trace elements to meet the specific requirements of the oil and gas industry. Meeting these requirements is crucial for the safe and reliable operation of oil and gas equipment. Special steel manufacturers work closely with industry standards and specifications to develop and provide materials that meet these demanding requirements, ensuring the integrity and performance of the equipment in the oil and gas sector.

Q:What are the magnetic properties of special steel?: Special steel can exhibit a range of magnetic properties depending on its composition and processing. It can be non-magnetic, weakly magnetic, or strongly magnetic. The specific magnetic properties of special steel can be tailored to meet specific requirements for different applications.

Q:How does special steel contribute to the manufacturing of springs?: Special steel contributes to the manufacturing of springs by providing specific mechanical properties that are crucial for their functionality. The unique composition and heat treatment of special steel ensure excellent strength, durability, and elasticity, allowing springs to efficiently store and release energy. Additionally, special steel's resistance to corrosion and fatigue enhances the lifespan and reliability of springs, making them suitable for various applications in industries such as automotive, aerospace, and machinery.

Q:What are the requirements for special steel used in renewable energy equipment manufacturing?: The requirements for special steel used in renewable energy equipment manufacturing are quite specific and unique compared to traditional steel used in other industries. Given the demanding nature of renewable energy equipment, the steel used must possess certain characteristics and properties to ensure optimal performance and durability. 1. Corrosion Resistance: Special steel used in renewable energy equipment must have excellent corrosion resistance to withstand exposure to harsh environmental conditions. This is particularly important for offshore wind turbines or solar panels installed in coastal areas with high salt content in the air. 2. High Strength and Toughness: The steel should have high strength and toughness to withstand mechanical stresses and loads. Renewable energy equipment, such as wind turbine towers or hydroelectric dams, experiences significant forces, including strong winds, water pressure, or vibrations. Steel with high strength can provide the necessary structural integrity to handle these forces. 3. Fatigue Resistance: Given the cyclic nature of renewable energy equipment, the steel must have excellent fatigue resistance. Wind turbines, for example, constantly experience alternating loads due to wind gusts and rotational forces. Special steel with fatigue resistance properties can prevent structural failures caused by repeated stress. 4. Weldability: Weldability is a crucial requirement for the steel used in renewable energy equipment manufacturing. Many components of renewable energy systems require welding, and the steel must be easily weldable without compromising its strength or other properties. 5. Environmental Sustainability: As renewable energy equipment is designed to promote sustainability, the steel used should align with this objective. Steel manufacturers are increasingly focusing on reducing the carbon footprint of their products by using recycled content or adopting greener production processes. 6. Cost-effectiveness: While meeting all the above requirements, special steel used in renewable energy equipment must also be cost-effective. The steel should provide the desired properties at a reasonable cost to ensure the competitiveness and viability of renewable energy projects. To meet these requirements, steel manufacturers often develop specific grades or alloys that cater to the needs of renewable energy equipment manufacturers. These grades are continuously evolving as the renewable energy industry advances, enabling the production of more efficient and durable equipment to support the transition to clean energy sources.

Q:Is special steel suitable for electrical and electronic applications?: Yes, special steel is suitable for electrical and electronic applications. Special steel is often used in electrical and electronic applications due to its excellent conductivity, high strength, and resistance to corrosion and wear. It is commonly utilized in the manufacturing of electrical connectors, circuit breakers, transformers, and various other components in the electrical and electronic industry.

Q:How is die steel used in metal stamping processes?: Die steel is commonly used in metal stamping processes due to its high strength, hardness, and wear resistance properties. It is used to create dies, which are specialized tools that shape and cut metal sheets or strips into desired shapes. Die steel ensures that the dies can withstand the high forces and repetitive actions involved in metal stamping, allowing for precise and efficient production of various metal components and products.

Q:How is electrical resistance steel used in heating elements?: Electrical resistance steel is commonly used in heating elements due to its high resistivity and ability to withstand high temperatures. When an electric current passes through the steel, its resistance generates heat, allowing the heating element to efficiently convert electrical energy into heat energy. This makes it suitable for applications such as electric stoves, water heaters, and industrial furnaces.

Q:What are the applications of special steel in the electronics industry?: Special steel has various applications in the electronics industry. It is commonly used to manufacture components such as connectors, springs, and contacts due to its high strength, corrosion resistance, and electrical conductivity. Additionally, special steel is employed in the production of magnetic cores for transformers and inductors, as it exhibits excellent magnetic properties. Its ability to withstand extreme temperatures and provide reliable performance makes it a preferred choice for electronics applications where durability and efficiency are crucial.

Q:What are the different methods for tempering special steel?: There are different methods available for tempering special steel, each having its own advantages and considerations. Some commonly used methods for tempering special steel are: 1. Air Tempering: Special steel is heated to a specific temperature and allowed to cool in still air. This method is suitable for low alloy steels and results in uniform hardness throughout the steel. 2. Oil Tempering: Special steel is heated to a specific temperature and then rapidly cooled by quenching it in oil. This method is commonly used for tool steels as it provides a good balance between hardness and toughness. 3. Water Tempering: Similar to oil tempering, this method involves quenching the steel in water after heating it to a specific temperature. It leads to a harder steel due to faster cooling, but it may also increase brittleness. 4. Salt Bath Tempering: The steel is immersed in a molten salt bath at a specific temperature. This method ensures controlled and uniform heat transfer, resulting in consistent hardness throughout the steel. 5. Cryogenic Tempering: Steel is cooled to extremely low temperatures, often below -100°C (-148°F), using liquid nitrogen or helium. This method further reduces residual stresses and enhances wear resistance of the steel. It is important to consider various factors such as the type of steel, desired hardness, intended application, and the required balance between hardness and toughness when choosing a specific tempering method for special steel. Following proper heat treatment guidelines and seeking advice from experts is crucial to achieve optimal results for a particular steel alloy.

Q:How does special steel perform in high-temperature oxidation resistance?: Special steel is specifically designed to have excellent high-temperature oxidation resistance. It is able to withstand prolonged exposure to high temperatures without undergoing oxidation, ensuring its structural integrity and performance are maintained even in extreme conditions.

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