• Special Steel Carbon Steel Round Bar S20C AISI 1020 System 1
  • Special Steel Carbon Steel Round Bar S20C AISI 1020 System 2
  • Special Steel Carbon Steel Round Bar S20C AISI 1020 System 3
Special Steel Carbon Steel Round Bar S20C AISI 1020

Special Steel Carbon Steel Round Bar S20C AISI 1020

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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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Item specifice

Type:
Stainless Steel,Gear Steel,Bearing Steel,Spring Steel,Alloy Steel,Carbon Steel,Deformed Steel
Shape:
Steel Coil,Steel Billets,Steel Round Bar,Steel Angle,Steel Square Bar,Steel Flat Bar,Steel Wire Rod,Steel Sheet
Technique:
Cold Drawn,Cold Rolled,Hot Rolled,Spring,EFW,Saw,Forged,ERW,Extruded
Surface Treatment:
PVDF Coated,Black,Bright,Polished,Chromed Passivation,Dry,Oiled,Color Coated,Copper Coated,Coated,Galvanized
Certification:
SGS,BV,IBR,RoHS,CE,API,BSI,ISO,UL

Product Information

 ◊ Standards and Chemical Composition:

 

 Carbon Structural Steel Bar 20#(GB)

Standards

Model

Chemical Composition (%)

C

Si

Mn

S(≤)

P(≤)

GB

20#

0.17-0.23

0.17-0.37

0.35-0.65

0.035

0.035

DIN

C22(1.0402)

0.17-0.24

0.40(max)

0.40-0.70

0.045

0.045

BS

IC22

0.17-0.24

0.40(max)

0.30-0.60

0.04

0.045

AISI/ATEM/SAE

1020

0.18-0.23

0.15-0.35

0.30-0.60

0.05

0.03

JIS

S20C

0.18-0.23

0.15-0.35

0.30-0.60

0.035

0.03

 

  ◊ Mechanical Property:

 

 Carbon Structural Steel Bar 20#(GB)

Yield Strength(MPa)

Tensile Strength(MPa)

Elongation(%)

AKV(J)

Reduction in Area(%)

Hardness(HB)

245

410

25

54

55%

156

 

       

◊ Application:

 

We can see that  the carbon steel bar has  higher plasticity, better toughness and better welding performance. This kind of steel is good material  in mading Lever shaft,  Transmission shift folk, Heavy machinery trolley,  Wheel gear,   Mental loop,  press forging parts, Rack rod, wear-resistant parts, for mold steel, etc. 

 

Product Show

Special Steel Carbon Steel Round Bar S20C AISI 1020


Workshop Show

Special Steel Carbon Steel Round Bar S20C AISI 1020


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 factors that affect the machinability of special steel?
Several factors can influence the machinability of special steel. The composition of the steel itself is one of the main factors. Special steels often contain complex alloys that enhance their properties, such as strength or corrosion resistance. However, these alloying elements can also have a negative impact on machinability. Chromium, nickel, and molybdenum, for example, can make the steel harder to machine due to their hardening or abrasive properties. The microstructure of the steel is another factor that affects machinability. Special steels can undergo heat treatments to achieve desired properties, but these treatments can also alter the microstructure of the material. The presence of carbides or precipitates can make the steel harder and more brittle, leading to increased tool wear and poorer machinability. The hardness of the steel is also important. Harder steels generally have lower machinability as they are more resistant to cutting forces. High-speed steels are often used to counteract this issue. However, excessively hard steels may require specialized tooling or machining techniques to achieve satisfactory results. Impurities or non-metallic inclusions in the steel can disrupt the cutting process and reduce tool life and surface finish. Special steel manufacturers strive to minimize impurities and control inclusion content to improve machinability. Lastly, cutting parameters and machining conditions play a significant role in determining machinability. Factors such as cutting speed, feed rate, and depth of cut must be optimized to achieve the best balance between material removal rate and tool life. Coolant usage and chip evacuation are also crucial considerations to prevent excessive heat buildup and chip recutting, which can negatively impact machinability. In conclusion, the machinability of special steel is affected by factors such as composition, microstructure, hardness, impurities, and cutting parameters. Understanding these factors and employing appropriate machining techniques can help maximize productivity and produce high-quality components from special steels.
Q:How does special steel contribute to the hardness of products?
Special steel contributes to the hardness of products through its unique composition and manufacturing processes. Unlike regular steel, special steel is alloyed with additional elements such as chromium, nickel, and manganese, which enhance its strength and durability. These alloying elements form solid solutions within the steel matrix, creating a more rigid and dense structure. The presence of these alloying elements in special steel allows for the formation of various microstructures, such as fine-grained structures or martensitic structures, which significantly increase the hardness of the steel. Moreover, special steel often undergoes heat treatment processes like quenching and tempering, which further refine its microstructure and improve its hardness. Additionally, the manufacturing processes used for special steel, such as hot rolling or cold working, can also contribute to its hardness. These processes deform the steel, aligning its grain structure and reducing any defects or impurities present, leading to a more uniform and harder material. The hardness of special steel is crucial in various industries where strength and resistance to wear and deformation are essential. For example, in the automotive industry, special steel is used to manufacture components like engine parts, gears, and axles, which require high hardness to withstand the demanding conditions and loads they experience. Similarly, in the construction industry, special steel is used for producing tools, cutting blades, and reinforcement bars, where hardness is crucial for longevity and performance. In summary, special steel contributes to the hardness of products through its unique alloying elements, manufacturing processes, and heat treatments. Its ability to form microstructures and its resistance to deformation make it an ideal material for applications where hardness is essential for performance and durability.
Q:What are the different methods of surface powder coating for special steel?
There are several methods of surface powder coating that are commonly used for special steel. These methods include: 1. Electrostatic powder coating: This method involves applying an electric charge to the powder particles and then spraying them onto the steel surface. The charged particles are attracted to the grounded steel, resulting in a uniform and durable coating. 2. Fluidized bed powder coating: In this method, the steel is preheated and then dipped into a fluidized bed of powder particles. The heat causes the powder to melt and form a smooth coating on the steel surface. Excess powder is then removed by shaking or blowing air. 3. Flame spray powder coating: This method involves heating the powder particles using a flame and then spraying them onto the steel surface. The heat melts the powder, which then solidifies to form a coating. Flame spray powder coating is often used for larger steel structures or for repairing damaged coatings. 4. Thermal spray powder coating: This method uses a thermal spray gun to heat and propel the powder particles onto the steel surface. The high velocity of the particles ensures good adhesion and a dense coating. Thermal spray powder coating is often used for high-wear applications or in corrosive environments. 5. UV-cured powder coating: This method involves applying a UV-sensitive powder onto the steel surface and then exposing it to UV light. The UV light initiates a chemical reaction that causes the powder to cure and form a hard coating. UV-cured powder coating is known for its fast curing time and excellent resistance to chemicals and UV radiation. Each of these methods has its own advantages and considerations, and the choice of method will depend on factors such as the specific requirements of the steel surface, the desired coating thickness, and the production volume.
Q:Can special steel be used for making springs?
Yes, special steel can be used for making springs. Special steels, such as alloy steels or stainless steels, offer enhanced properties like increased strength, durability, and corrosion resistance, making them suitable for spring applications that require specific performance characteristics.
Q:What is the purpose of annealing in special steel production?
The purpose of annealing in special steel production is to improve the steel's mechanical properties and reduce its internal stresses. This process involves heating the steel to a specific temperature and holding it at that temperature for a certain period of time, followed by controlled cooling. Annealing helps to enhance the steel's ductility, toughness, and machinability, making it easier to work with and ensuring consistent and reliable performance in various applications.
Q:How does special steel contribute to improving product aesthetics?
Special steel can contribute to improving product aesthetics in several ways. Firstly, special steel can be manufactured with unique finishes and textures, enhancing the overall visual appeal of a product. This can include brushed, polished, or matte finishes, adding a touch of sophistication and elegance. Secondly, special steel can be shaped and formed into intricate and precise designs, allowing for the creation of visually appealing and intricate product components. Additionally, the strength and durability of special steel can enable products to have sleek and slim designs, reducing bulkiness and enhancing the overall aesthetics. Overall, special steel offers designers and manufacturers a versatile material that can enhance the visual appeal and aesthetic quality of their products.
Q:How does special steel contribute to weight reduction in manufacturing?
Special steel contributes to weight reduction in manufacturing through its unique properties and characteristics. Special steels are designed to have high strength-to-weight ratios, allowing manufacturers to use less material while still achieving the desired strength and performance. This results in lighter and more efficient products without compromising their structural integrity. Additionally, special steels can be processed into complex shapes, enabling the production of intricate components that are both lightweight and strong. Overall, the use of special steel in manufacturing helps reduce the overall weight of products, leading to improved fuel efficiency, lower transportation costs, and increased sustainability.
Q:What are the main alloying elements used in special steel?
The main alloying elements used in special steel include chromium, nickel, molybdenum, vanadium, and tungsten.
Q:What are the common challenges in heat treating special steel?
Heat treating special steel poses a range of difficulties. One of the main challenges is to attain the desired hardness and strength while maintaining the desired microstructure. Special steels often necessitate specific heat treatment processes, such as quenching and tempering, to achieve the desired mechanical properties. However, the high alloy content in these steels can make it challenging to achieve uniform heat distribution and control the cooling rate during quenching, resulting in inconsistent hardness and potential distortion. Another obstacle in heat treating special steel is managing residual stresses. During the heating and cooling process, differential thermal expansion and contraction can cause stress to accumulate within the steel, potentially leading to cracking or distortion. To minimize these stresses, it is crucial to employ proper heat treatment techniques, such as preheating and controlled cooling rates. Special steels also require stringent cleanliness standards, as impurities or non-metallic inclusions can adversely affect their mechanical properties. Ensuring the cleanliness of the steel prior to heat treatment can be difficult and may entail additional steps, such as degreasing, pickling, or using protective atmospheres during heat treatment. Furthermore, some special steels are highly susceptible to overheating, which can result in grain growth and the loss of desired properties. To prevent overheating and ensure consistent outcomes, precise temperature control and monitoring are essential. Finally, heat treatment of special steels must take into account specific time-temperature transformation (TTT) and continuous cooling transformation (CCT) characteristics. Understanding and adhering to the appropriate heating and cooling cycles are crucial for achieving the desired microstructure and properties. In conclusion, the challenges in heat treating special steel include achieving the desired hardness and microstructure, managing residual stresses, ensuring cleanliness, preventing overheating, and adhering to specific time-temperature transformation characteristics. Overcoming these challenges necessitates expertise, precise control, and strict adherence to heat treatment protocols.
Q:What are the specific requirements for special steel used in the defense armor industry?
The specific requirements for special steel used in the defense armor industry are as follows: 1. High strength: Special steel used in defense armor must possess exceptional strength to withstand the impact of projectiles and explosives. It should be able to resist deformation and penetration under extreme conditions. 2. Hardness: The steel should have high hardness to provide resistance against cutting, drilling, or other forms of mechanical damage. This property ensures that the armor can withstand attacks and prevent penetration. 3. Toughness: Special steel needs to exhibit toughness, which allows it to absorb and dissipate the energy generated from impacts. This property helps to minimize the damage caused by projectiles and explosions. 4. Ballistic resistance: The steel should possess excellent ballistic resistance to effectively stop or deflect projectiles. It should be able to absorb and distribute the impact energy over a larger area, reducing the likelihood of penetration. 5. Corrosion resistance: Defense armor is exposed to various environmental conditions, including moisture and chemicals. Therefore, the special steel used in defense armor must have high corrosion resistance to ensure its longevity and effectiveness. 6. Weldability: The steel should be easily weldable to allow for the construction of complex armor structures. Weldability ensures that the armor can be conveniently assembled, repaired, or modified as per the specific requirements. 7. Heat resistance: Defense armor may need to withstand high temperatures generated from explosions or intense fire. Special steel should possess heat resistance to maintain its structural integrity and protective capabilities under such extreme conditions. 8. Lightweight: While maintaining the above properties, special steel should also be lightweight to ensure ease of mobility for soldiers and vehicles. The armor should not hinder movement or impose excessive weight burdens. Meeting these requirements is crucial to ensure the effectiveness and reliability of defense armor in providing protection to military personnel and assets.

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