Round Bar Steel Bar EN8 EN9 Special Steel

Round Bar Steel Bar EN8 EN9 Special Steel System 1

Round Bar Steel Bar EN8 EN9 Special Steel

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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: Q235, SAE1020, SAE1040,SAE1045, 20Cr/SAE5120, 40Cr/SAE5140,

SCM440/SAE4140/42CrMo, SS400

2. Size: 8mm--100mm

3. Shape: flat bar, round bar, hexagonal bar, square bar, and so on.

4. Payment Terms: T/T, L/C.

5. MOQ: 5MT

6. Delivery terms: FOB or CIF

7. Shipment time: 35days or according to the qty.

8. Advantages: fast delivery, full-size, large inventories and accurate precision.

Chemical Composition:

STEEL GRADE	Similar Brand			Chemical Composition(%)
GB	AISI SAE	JIS	DIN	C	Si	Mn	Cr	Mo	Ni(≤)	P(≤)	S(≤)
20	1020	S20C	CK22	0.17-0.24	0.17-0.37	0.35-0.65	0.25	/	0.25	0.035	0.035
45	1045	S45C	CK45	0.42-0.50	0.17-0.37	0.50-0.80	0.25	/	0.25	0.035	0.035
15CrMo	4115	SCM415	15CrMo5	0.12-0.18	0.17-0.37	0.40-0.70	0.80-1.10	0.40-0.55	0.30	0.035	0.035
30CrMo	4130	SCM430	25CrMo4	0.26-0.34	0.17-0.37	0.40-0.70	0.80-1.10	0.15-0.25	0.030	0.035	0.035
42CrMo	4140	SCM440	42CrMo4	0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.20	0.15-0.25	0.030	0.035	0.035

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Round Bar Steel Bar EN8 EN9 Special Steel

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 different classifications of special steel?: Various types of steel alloys fall under the category of special steel, each possessing unique properties and characteristics that make them suitable for specific applications. Special steel can be classified into several categories: 1. Stainless Steel: This special steel contains a high percentage of chromium, which provides excellent corrosion resistance. It also typically includes elements like nickel and molybdenum, enhancing its strength and durability. Stainless steel finds common use in applications requiring resistance to oxidation, heat, chemicals, and wear, such as in food processing, medical devices, and construction. 2. Tool Steel: Specifically designed for manufacturing tools, dies, and molds, tool steel is known for its exceptional hardness, wear resistance, and toughness. Tool steel is further categorized into subcategories like high-speed steel (HSS), cold work steel, hot work steel, and plastic mold steel, each tailored for specific tooling applications. 3. Alloy Steel: This type of special steel contains additional alloying elements besides carbon. These elements, like manganese, silicon, nickel, chromium, and molybdenum, are added to enhance specific properties such as strength, toughness, hardenability, and corrosion resistance. Alloy steels are used in various applications, including automotive components, machinery, construction, and aerospace. 4. Spring Steel: Specifically designed to withstand repeated bending or twisting without permanent deformation, spring steel possesses excellent elasticity and fatigue resistance. It finds applications in springs, suspension systems, and high-performance automotive parts. 5. Bearing Steel: Bearing steel is engineered to provide high hardness, wear resistance, and dimensional stability necessary for manufacturing bearings. It typically contains high levels of carbon, chromium, and other alloying elements, ensuring the required mechanical properties for reliable and long-lasting bearings. 6. Electrical Steel: Also known as silicon steel, electrical steel is specifically designed for electrical applications. It possesses low electrical resistivity and high magnetic permeability, allowing efficient conduction and transformation of electrical energy. Electrical steel is commonly used in transformers, electric motors, and generators. These classifications of special steel emphasize the versatility and tailored properties of different steel alloys, enabling their application in a wide range of industries and specialized uses.

Q: What are the different types of free-cutting steel?: There are several different types of free-cutting steel, including leaded free-cutting steel, sulfurized free-cutting steel, and phosphorus free-cutting steel. These types of steel contain certain elements that improve machinability and make them easier to cut or shape.

Q: What are the different methods for surface hardening special steel?: There are several methods for surface hardening special steel, including carburizing, nitriding, induction hardening, flame hardening, and laser hardening. Carburizing involves introducing carbon into the surface of the steel through heating in a carbon-rich environment. Nitriding involves diffusing nitrogen into the surface of the steel to create a hard nitride layer. Induction hardening uses electromagnetic induction to heat the surface of the steel and then rapidly quench it to increase hardness. Flame hardening involves heating the surface of the steel with a flame and then quenching it to harden the surface. Laser hardening uses a high-intensity laser beam to heat the surface of the steel and then quench it, resulting in a hardened surface.

Q: What are the properties of creep-resistant steel?: Creep-resistant steel is a type of steel that possesses certain properties to resist deformation under high temperatures and prolonged stress. These properties include high creep strength, which allows the steel to maintain its structural integrity even at elevated temperatures over long periods of time. Additionally, it has good resistance to creep rupture, meaning it can withstand high stress levels without fracturing. Creep-resistant steel also exhibits good thermal stability, low thermal expansion, and high resistance to corrosion, making it suitable for applications in industries such as power generation, oil and gas, and aerospace.

Q: What is the cost of special steel compared to other materials?: The cost of special steel can vary depending on various factors such as the type of steel, its composition, and market conditions. Generally, special steel tends to be more expensive than common materials like carbon steel or aluminum due to its unique properties and specialized manufacturing processes. However, it is important to consider that the cost of materials is just one aspect of the overall cost of a project, as factors like durability, performance, and maintenance requirements also play a significant role in the decision-making process.

Q: How does special steel contribute to the manufacturing of aerospace components?: Special steel plays a vital role in the manufacturing of aerospace components due to its unique properties and characteristics. Its exceptional strength, durability, and resistance to extreme temperatures and corrosion make it an ideal material for various applications in the aerospace industry. One of the main contributions of special steel to aerospace manufacturing is its ability to withstand high stress and pressure. Aerospace components, such as turbine blades, landing gear, and structural supports, are subjected to tremendous forces during flight. Special steel's strength and toughness allow these components to endure these forces without failure, ensuring the safety and reliability of the aircraft. Additionally, special steel's resistance to extreme temperatures is crucial in the aerospace industry. Aircraft engines, for example, operate at extremely high temperatures, and special steel alloys, such as those containing nickel or cobalt, are used to manufacture components like turbine discs and combustion chambers. These alloys can withstand the intense heat and prevent deformation or failure, ensuring optimal engine performance and efficiency. Furthermore, special steel's resistance to corrosion is essential for aerospace applications. Aircraft are constantly exposed to harsh environmental conditions, including moisture, chemicals, and saltwater. Special steel alloys, such as stainless steel, are highly resistant to corrosion, preventing degradation and maintaining the structural integrity of aerospace components over time. This is particularly important for critical parts like fuel tanks, hydraulic systems, and airframe structures. In conclusion, special steel significantly contributes to the manufacturing of aerospace components by providing strength, durability, resistance to extreme temperatures, and corrosion resistance. Its unique properties ensure the safety, reliability, and longevity of aerospace systems, making it an indispensable material in the aerospace industry.

Q: What are the different heat treatment methods for special steel?: There are several heat treatment methods for special steel, including annealing, normalizing, quenching, tempering, and case hardening. Annealing involves heating the steel and then slowly cooling it to relieve internal stresses and improve its ductility. Normalizing is a similar process but involves cooling the steel in still air to achieve a more uniform structure. Quenching is a rapid cooling process that results in a hardened steel with increased strength and hardness. Tempering involves reheating the hardened steel to a specific temperature to reduce its brittleness and improve toughness. Finally, case hardening is a process where only the surface of the steel is hardened, while the core remains relatively soft, resulting in a tough and wear-resistant material.

Q: Can special steel be used in corrosive environments?: Yes, special steel can be used in corrosive environments. Special types of steel, such as stainless steel or corrosion-resistant alloys, are designed to withstand corrosion caused by exposure to moisture, chemicals, or other corrosive elements. These materials have a higher resistance to rust and corrosion, making them suitable for applications in corrosive environments like marine environments, chemical plants, or oil and gas facilities.

Q: What are the different test methods used to evaluate special steel?: Special steel undergoes several test methods to evaluate its quality and performance, ensuring that it meets the required standards and specifications. Commonly employed test methods include: 1. Tensile Testing: This method assesses the steel's ability to withstand tension or pulling forces, determining its ultimate tensile strength, yield strength, and elongation. 2. Hardness Testing: Hardness tests, such as Rockwell or Brinell tests, evaluate the steel's resistance to indentation or scratching, providing insight into its strength and durability. 3. Impact Testing: This test measures the steel's capacity to absorb energy under high-stress conditions. Charpy and Izod tests are frequently used to determine the steel's toughness and resistance to sudden shocks or impacts. 4. Chemical Analysis: Determining the steel's composition, including the percentage of elements like carbon, manganese, and chromium, guarantees that it meets the necessary specifications and standards. 5. Microstructure Evaluation: Microscopic examination of the steel's microstructure reveals crucial information about its grain size, phase distribution, and any potential defects or inclusions. Optical microscopy or electron microscopy techniques are employed for this purpose. 6. Corrosion Testing: Special steel must endure harsh environments or corrosive substances. Various corrosion tests, such as salt spray tests or immersion tests, assess the steel's resistance to corrosion and degradation. 7. Non-Destructive Testing (NDT): NDT methods, including ultrasonic testing, magnetic particle testing, or eddy current testing, detect surface or internal defects without damaging the steel. These tests provide valuable information about the steel's structural integrity. 8. Fatigue Testing: Fatigue tests simulate repetitive loading conditions to evaluate the steel's resistance to cyclic stress, assessing its durability and ability to withstand long-term usage or repetitive loading. Utilizing these diverse test methods, manufacturers and quality control departments can thoroughly assess the mechanical properties, chemical composition, microstructure, and other crucial factors of special steel, ensuring it meets the necessary standards and specifications.

Q: What is the role of chromium in special steel?: Chromium plays a crucial role in special steel due to its unique properties and characteristics. It is primarily added to steel alloys to enhance their corrosion resistance, durability, and strength. One of the significant contributions of chromium is its ability to form a passive oxide layer on the surface of steel, known as chromium oxide. This oxide layer acts as a protective barrier, preventing the underlying steel from coming into contact with corrosive elements such as oxygen and moisture. This corrosion resistance makes chromium-containing steel highly suitable for applications in harsh environments, such as marine or chemical industries, where the material is exposed to corrosive agents. Furthermore, chromium also improves the mechanical properties of steel. It increases the steel's hardness, toughness, and wear resistance. This makes it valuable in manufacturing tools, machinery components, and other applications that require high strength and durability. Chromium also helps in retaining the steel's sharpness and edge retention, making it ideal for making high-quality knives and blades. Additionally, chromium is essential in heat-resistant steel alloys, as it significantly improves the material's ability to withstand high temperatures without losing its strength or shape. This makes it suitable for various applications, including turbine blades, exhaust systems, and aerospace components. In summary, chromium plays a vital role in special steel by enhancing its corrosion resistance, improving mechanical properties, and enabling it to withstand high temperatures. These properties make chromium-containing steel alloys highly versatile and valuable in a wide range of industries and applications.

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