Special Steel Forged Carbon Steel SS400 Q235

Special Steel Forged Carbon Steel SS400 Q235 System 1

Special Steel Forged Carbon Steel SS400 Q235

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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 Comparison:

GB	ASTM	JIS	EN
Q235	Grade D	SS400	S235JR(1.0038) /S235JO(1.0114) /S235J2(1.0117)

2 Chemical Composition:

Q235A

C	Mn	Si	S	P
0.14-0.22	0.30-0.65	≤0.30	≤0.050	≤0.045

Q235B

C	Mn	Si	S	P
0.12-0.20	0.30-0.70	≤0.30	≤0.045	≤0.045

Q235C

C	Mn	Si	S	P
≤0.18	0.35-0.80	≤0.30	≤0.035	≤0.035

Q235D

C	Mn	Si	S	P
≤0.17	0.35-0.80	≤0.30	≤0.035	≤0.035

3 Brief Introduction:

Dimension	13-350mm
Length	2-13m or as per your request
Delivery condition	Hot rolled
Heat Treatment	Normalizing, Annealing, Quenching
Packing	Standard seaworthy packing or according to your requirements

4 Mechanical Property:

Thickness/diameter(mm)	Tensile strength	Yield strength	Elongation rate
≤16	375MPa-500MPa	≥235MPa	≥26%
16-40		≥225MPa	≥25%
40-60		≥215MPa	≥24%
60-100		≥205MPa	≥23%
100-150		≥195MPa	≥22%
>150		≥185MPa	≥21%

Product Show

Special Steel Forged Carbon Steel SS400 Q235

Workshop Show

Special Steel Forged Carbon Steel SS400 Q235

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 cutting grades of special steel?: There are several cutting grades of special steel that are commonly used in various industries. These cutting grades are designed to possess specific properties and characteristics that make them suitable for different cutting applications. Some of the different cutting grades of special steel include: 1. High-speed steel (HSS): This cutting grade is known for its excellent hardness, wear resistance, and heat resistance. It can retain its hardness at high temperatures, making it ideal for cutting tools used in high-speed machining operations. 2. Tool steel: Tool steel is a versatile cutting grade that is used for a wide range of cutting applications. It offers high hardness, toughness, and abrasion resistance, making it suitable for cutting tools, dies, and molds. 3. Stainless steel: Stainless steel is a popular cutting grade due to its corrosion resistance and durability. It is commonly used in the food, medical, and automotive industries, where precision cutting and cleanliness are crucial. 4. Carbon steel: Carbon steel is a commonly used cutting grade known for its high strength and toughness. It is often used for cutting tools, knives, and blades. However, carbon steel is susceptible to corrosion, so proper maintenance and care are necessary to prevent rusting. 5. Alloy steel: Alloy steel is a cutting grade that is made by combining different elements to enhance its properties. It offers improved hardness, strength, and wear resistance, making it suitable for high-stress cutting applications. Alloy steel is commonly used in the aerospace, automotive, and construction industries. These are just a few examples of the different cutting grades of special steel. Each grade has its own unique properties and advantages, allowing manufacturers to choose the most suitable grade based on the specific cutting requirements and conditions.

Q:What are the main characteristics of spring steel?: Spring steel is a type of high-carbon steel known for its exceptional elasticity and resilience. Its main characteristics include high tensile strength, excellent fatigue resistance, and the ability to withstand repeated bending or twisting without permanent deformation. Spring steel also exhibits good corrosion resistance, making it suitable for various applications where durability and flexibility are required, such as springs, clips, and automotive components.

Q:What are the main manufacturing processes for special steel?: The main manufacturing processes for special steel include melting, refining, casting, hot rolling, heat treatment, cold rolling, and surface treatment.

Q:How is high-temperature stainless steel used in the production of gas turbines?: High-temperature stainless steel is used in the production of gas turbines due to its excellent heat resistance and corrosion properties. It is used to fabricate components such as combustion chambers, turbine blades, and exhaust systems, which are exposed to extreme temperatures and corrosive environments. The high-temperature stainless steel ensures the durability and efficiency of gas turbines, allowing them to operate at high temperatures without compromising performance or longevity.

Q:What are the different grades of special steel?: There are various grades of special steel, including stainless steel grades such as 304, 316, and 410, tool steel grades like D2, A2, and M2, and high-speed steel grades such as M42 and T15. Each grade has unique properties and applications, making them suitable for specific purposes in industries like construction, automotive, and manufacturing.

Q:What are the different methods for improving the heat resistance of special steel?: There are various techniques available to enhance the heat resistance of special steel. These techniques comprise: 1. Alloying: Enhancing the heat resistance of steel can be achieved by alloying it with specific elements. The addition of chromium, nickel, or molybdenum, for instance, significantly augments the steel's ability to withstand high temperatures. 2. Heat treatment: Heat treatment processes like annealing, quenching, and tempering can be employed to enhance the heat resistance of special steel. These processes refine the steel's microstructure and enhance its mechanical properties, including heat resistance. 3. Surface modification: The heat resistance of special steel can be improved by applying specialized coatings or surface treatments. Processes such as nitriding, carburizing, or ceramic coating create a protective layer on the steel's surface, preventing oxidation and enhancing its ability to withstand high temperatures. 4. Grain refinement: Heat resistance can be improved by controlling the grain size of the steel through processes like grain refinement or recrystallization. Smaller grain sizes reduce the diffusion of atoms within the material, making it more resistant to high temperatures. 5. Precipitation hardening: Precipitation hardening involves the formation of small particles within the steel matrix, strengthening the material and improving its resistance to heat. This technique requires a specific heat treatment process to enable the formation of these particles. 6. Controlled cooling: Optimizing the cooling process after heat treatment can also enhance the heat resistance of special steel. By controlling the cooling rate, the formation of unwanted phases or microstructural defects can be minimized, ensuring better heat resistance. 7. Material selection: Selecting the appropriate type of special steel with inherent high heat resistance properties is another method to improve heat resistance. Stainless steel, tool steel, or superalloys, for instance, are renowned for their excellent heat resistance and are often chosen for applications involving high temperatures. It is important to note that the choice of the suitable method or combination of methods for enhancing heat resistance depends on the specific requirements and limitations of the application.

Q:What are the different types of coatings for special steel?: There are several types of coatings that can be applied to special steel to enhance its performance and protect it from various environmental factors. Some of the common types of coatings for special steel include: 1. Zinc-based coatings: These coatings, such as galvanized steel, provide excellent corrosion resistance. The zinc layer acts as a sacrificial barrier, protecting the underlying steel from rusting. 2. Epoxy coatings: Epoxy coatings are highly resistant to chemicals, moisture, and abrasion. They are often used in industries where the steel is exposed to harsh conditions or corrosive substances. 3. Powder coatings: Powder coatings offer a durable and attractive finish to special steel. They are applied as a dry powder and then cured under heat, forming a hard, protective layer that is resistant to chipping, fading, and corrosion. 4. Ceramic coatings: Ceramic coatings are known for their high-temperature resistance and excellent thermal insulation properties. They are often used in applications where the steel is exposed to extreme heat or rapid temperature changes. 5. Organic coatings: Organic coatings, such as acrylics and polyurethanes, provide a protective barrier against moisture, UV radiation, and chemicals. They are commonly used in outdoor applications, such as architectural structures or automotive parts. 6. Phosphate coatings: Phosphate coatings are primarily used as a pre-treatment before applying other coatings or paints. They improve adhesion and corrosion resistance of subsequent layers, providing a more durable finish. 7. Polymer coatings: Polymer coatings offer excellent resistance to abrasion, impact, and chemicals. They are commonly used in industrial settings where steel is subject to heavy wear and tear. It is important to select the appropriate type of coating based on the specific requirements of the special steel and the environment it will be exposed to. Each coating type has its own set of advantages and limitations, so a thorough analysis should be conducted to determine the most suitable option.

Q:What are the different manufacturing processes used for special steel?: There are several different manufacturing processes used for special steel, depending on the specific requirements and properties desired for the final product. Some of the commonly used manufacturing processes for special steel include: 1. Electric Arc Furnace (EAF): This process involves melting scrap metal in an electric arc furnace, where high electrical current passes through the electrodes to melt the metal. EAF is commonly used for producing stainless steel, tool steel, and alloy steel. 2. Basic Oxygen Furnace (BOF): BOF is a process where molten iron from a blast furnace is combined with scrap metal and oxygen is blown through the mixture to remove impurities. BOF is widely used for producing carbon and low-alloy steels. 3. Vacuum Degassing: This process is used to remove impurities like hydrogen, nitrogen, and sulfur from steel by subjecting it to a vacuum environment. Vacuum degassing is often employed for producing high-quality and ultra-clean special steels. 4. Continuous Casting: In this process, molten steel is poured into a water-cooled mold, where it solidifies into a continuous strand. Continuous casting helps to produce steel with a consistent shape, size, and internal structure, and is commonly used for semi-finished products like billets, slabs, and blooms. 5. Powder Metallurgy: This manufacturing process involves compacting metal powders into the desired shape and then sintering them at high temperatures to bond the particles together. Powder metallurgy is often used for producing special steels with specific properties, such as high strength, wear resistance, or corrosion resistance. 6. Heat Treatment: Heat treatment processes like annealing, quenching, and tempering are commonly employed to modify the microstructure and properties of special steels. These processes involve heating the steel to specific temperatures and then cooling it in a controlled manner to achieve desired hardness, toughness, and other mechanical properties. Each of these manufacturing processes has its own advantages and limitations, and the choice of process depends on factors such as the type of steel required, the desired properties, and the cost-effectiveness of the process for a particular application.

Q:What are the requirements for special steel used in mining equipment?: Special steel used in mining equipment needs to possess certain key requirements. Firstly, it must have high strength and toughness to withstand the harsh and demanding conditions present in mining operations. It should also exhibit excellent wear resistance to endure the abrasive nature of rocks and minerals. Additionally, corrosion resistance is crucial to prevent the steel from deteriorating due to exposure to water, chemicals, and other corrosive substances commonly found in mining environments. Finally, the special steel used in mining equipment should be capable of maintaining its mechanical properties at elevated temperatures, as mining processes often involve high heat generation. Overall, the requirements for special steel in mining equipment revolve around durability, wear resistance, corrosion resistance, and heat resistance.

Q:How does special steel perform in cryogenic conditions?: Special steel performs well in cryogenic conditions due to its low ductile-brittle transition temperature, high strength, and good toughness. It maintains its mechanical properties and resists cracking or fracture at extremely low temperatures, making it suitable for various applications such as liquefied natural gas (LNG) storage tanks, aerospace components, and cryogenic research equipment.

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