Hot rolled, forged, QT heat treatment and normalizing
6. Payment term
T/T, L/C or we can negotiate.
7. Delivery time
20days after the order confirmed
8. Characteristics
1) The strength and hardness of S20C/ 1020/ 20 is higher than that of S15C/ 1015/ 15.
2) Good plasticity and weldability.
3) Good toughness after hot rolling and normalization.
9. Application
S20C structural carbon steel bar /1020 /20 can be used to be manufactured medium or small carburization or nitrocarburizing parts and press forging parts, such as lever shaft, selector fork of speed changing box, gear, heavy mechanical lever and shackle, etc.
Products Show
Product Overviews
Product Name
Typical Grades
Diameter(mm)
Standard adopted
Carbon Steel
20 (1020/S20C/C22)
Ø16-Ø300
GB/SAE/JIS/DIN
40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing Steel
GCr9 (51100/SUJ1)
Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)
Cr-Mo Steel
20Cr (5120/SCr420H/20Cr4)
Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel
20CrNiMo
Ø16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)
Application
Carbon Steel
Mold bottom, Plastic mold, Construction machinery parts
Automobile parts, Security grills, Screens, Construction
Bearing Steel
Aerospace, Navigation, Nuclear energy, Chemical industry
Electronic information, Petrochemical, Instrument and meter
Transportation
Cr-Mo Steel
Mechanism & Fasteners gear, Stressed components for vehicles
Q:What are the advantages of using silicon-alloy steel round bars?
Silicon-alloy steel round bars offer several benefits that make them a favorable choice. Firstly, their strength and durability are exceptional, making them suitable for heavy-duty applications. Their high tensile strength allows them to withstand heavy loads and resist deformation, ensuring reliability for mechanical and structural purposes.
Secondly, these round bars exhibit excellent heat resistance. The presence of silicon in the alloy enhances their ability to handle high temperatures without compromising their structural integrity. This makes them ideal for applications that involve exposure to extreme heat, such as furnace components, exhaust systems, or high-temperature equipment.
Furthermore, silicon-alloy steel round bars provide remarkable corrosion resistance. The inclusion of alloying elements like chromium and nickel creates a protective oxide layer on the surface, preventing corrosion and extending their lifespan. This makes them suitable for use in corrosive atmospheres and marine environments.
Additionally, these round bars offer good machinability and weldability. Their ease of forming into various shapes and sizes makes them versatile for different manufacturing processes. Moreover, their weldability allows for easy fabrication and customization, making them convenient for numerous industries.
Lastly, silicon-alloy steel round bars are cost-effective. In comparison to other high-performance alloys, they are relatively more affordable, making them a cost-effective option for applications that require strength, durability, heat resistance, and corrosion resistance.
In conclusion, the advantages of silicon-alloy steel round bars encompass their excellent strength and durability, good heat resistance, corrosion resistance, machinability, weldability, and cost-effectiveness. These attributes establish silicon-alloy steel as a versatile and reliable material for various industrial applications.
Q:What is the tensile strength of Q235 round steel?
Level 1, surface shape, light circle, strength code R235, grade Q235, carbon content 0.14%-0.22%. Silicon content 0.12%-0.30%. Manganese content 0.30%-0.65%, phosphorus content is equal to less than 0.045%, sulfur content is less than or equal to 0.050%,
Q:What is the tolerance for length in steel round bars?
The tolerance for length in steel round bars can vary depending on the specific manufacturing standards and requirements. Generally, the tolerance for length in steel round bars is typically specified in terms of a maximum allowable deviation from the desired or nominal length. This deviation is often expressed as a percentage or as a specific measurement in units such as millimeters or inches.
Different international standards organizations, such as the American Society for Testing and Materials (ASTM) or the International Organization for Standardization (ISO), may have their own specific guidelines for the tolerance in steel round bars. These standards help ensure consistent and reliable measurements throughout the industry.
In practice, the tolerance for length in steel round bars can range from very tight tolerances of a few millimeters or less, especially for precision applications, to looser tolerances of several centimeters or more for less critical or general-purpose applications.
It is important to note that the tolerance for length may also depend on the size and diameter of the steel round bar. Smaller diameter bars may have tighter tolerances compared to larger diameter bars due to the increased difficulty in manufacturing and measuring longer lengths accurately.
Ultimately, the specific tolerance for length in steel round bars should be determined based on the intended application and any applicable industry standards or customer specifications.
Q:What are the advantages of using nickel-chromium-silicon alloy steel round bars?
There are several advantages of using nickel-chromium-silicon alloy steel round bars:
1. High temperature resistance: Nickel-chromium-silicon alloy steel round bars have excellent resistance to high temperatures, making them ideal for applications that involve exposure to extreme heat. They can withstand temperatures up to 1200°C without losing their strength or structural integrity.
2. Corrosion resistance: These alloy steel round bars have good corrosion resistance, particularly in environments where they are exposed to acids, alkalis, and other corrosive substances. This makes them suitable for use in industries such as chemical processing, oil and gas, and marine applications.
3. High strength and durability: Nickel-chromium-silicon alloy steel round bars have high tensile strength and toughness, which allows them to withstand heavy loads and resist deformation. They are known for their exceptional durability and long service life, even under demanding conditions.
4. Excellent mechanical properties: These alloy steel round bars exhibit excellent mechanical properties, including good ductility, impact resistance, and fatigue strength. This makes them suitable for various applications that require high performance and reliability, such as structural components, machine parts, and tools.
5. Ease of fabrication: Nickel-chromium-silicon alloy steel round bars can be easily machined, welded, and formed into various shapes and sizes. This allows for greater design flexibility and ease of fabrication, making them a preferred choice for manufacturers.
6. Cost-effective: Despite their numerous advantages, nickel-chromium-silicon alloy steel round bars are relatively cost-effective compared to other high-performance materials. Their long service life and resistance to wear and tear make them a cost-efficient choice in the long run, as they reduce the need for frequent replacements and maintenance.
Overall, the advantages of using nickel-chromium-silicon alloy steel round bars make them an excellent choice for applications that require high temperature resistance, corrosion resistance, strength, durability, and ease of fabrication.
Q:Can steel round bars be plated or coated?
Steel round bars can undergo plating or coating, which is a widely employed technique to enhance their appearance, durability, and resistance to corrosion. During this process, a layer of a different material is applied to the surface of the steel round bars using methods like electroplating, hot-dip galvanizing, powder coating, or painting. The choice of plating or coating material depends on the specific requirements and desired properties of the steel round bars. For instance, zinc plating is often used to provide corrosion resistance, while chrome plating can enhance their aesthetic appeal. In summary, plating or coating steel round bars can significantly enhance their performance and prolong their lifespan.
Q:What is the maximum manganese content allowed for steel round bars?
The maximum manganese content allowed for steel round bars can vary depending on the specific grade or standard being followed. In general, the manganese content in steel round bars is typically limited to a maximum of around 1.65% by weight. This is because higher levels of manganese can negatively impact the mechanical properties and weldability of the steel. However, it is important to note that different industries or applications may have their own specific requirements or allowances for manganese content in steel round bars. Therefore, it is always advisable to consult the relevant specifications or standards to determine the maximum manganese content allowed for a particular grade of steel round bars.
Q:What are the different types of finishes available for steel round bars?
There are several types of finishes available for steel round bars, including hot rolled, cold drawn, turned and polished, and coated finishes. Each finish has its own unique characteristics and is suitable for specific applications.
Q:What are the advantages of using chromium-vanadium alloy steel round bars?
There are several advantages of using chromium-vanadium alloy steel round bars:
1. High Strength: Chromium-vanadium alloy steel is known for its exceptional strength and hardness. It has a high tensile strength, making it suitable for applications that require heavy-duty performance and resistance to wear and tear.
2. Durability: The addition of chromium and vanadium elements enhances the durability of the alloy steel round bars. It provides excellent resistance to corrosion, oxidation, and high temperatures, making it ideal for use in harsh environments.
3. Versatility: Chromium-vanadium alloy steel round bars offer versatility in various applications. They can be used for manufacturing tools, springs, gears, and other components that require high strength and durability. The versatility of this alloy steel makes it a preferred choice in industries such as automotive, aerospace, and construction.
4. Machinability: Chromium-vanadium alloy steel is relatively easy to machine and work with, making it convenient for manufacturers. It can be easily shaped, cut, and formed into desired shapes and sizes without compromising its mechanical properties.
5. Cost-Effective: Despite its excellent properties, chromium-vanadium alloy steel round bars tend to be more cost-effective compared to other high-performance alloys. This makes it a popular choice for industries that require strong and durable materials without exceeding their budget.
6. Fatigue Resistance: Chromium-vanadium alloy steel exhibits exceptional fatigue resistance, making it suitable for applications that involve repetitive stress or cyclic loading. It can withstand repeated use and maintain its structural integrity over an extended period.
Overall, chromium-vanadium alloy steel round bars offer a combination of high strength, durability, versatility, and cost-effectiveness. These advantages make it a preferred material choice for various industrial applications where reliability and performance are crucial.
Q:What are the different tolerances for steel round bars?
The different tolerances for steel round bars depend on various factors such as the diameter, length, and intended application. Common tolerances for steel round bars include diameter tolerances ranging from +/- 0.005 inches to +/- 0.030 inches, length tolerances ranging from +/- 0.125 inches to +/- 0.500 inches, and straightness tolerances ranging from 0.0125 inches per foot to 0.030 inches per foot. However, specific tolerances may vary depending on the specific requirements set by the industry or customer.
Q:What are the different grades of carbon steel round bars for structural applications?
Structural applications offer a variety of grades for carbon steel round bars, each possessing unique properties and characteristics. Some commonly used grades are as follows:
1. ASTM A36: Widely utilized for structural projects, this grade of carbon steel round bars boasts exceptional weldability and machinability.
2. ASTM A572-50: This high-strength, low-alloy structural steel grade provides an improved strength-to-weight ratio compared to traditional carbon steel. It is often employed in construction and structural applications requiring high strength.
3. ASTM A588: Primarily utilized in corrosion-resistant applications, this high-strength, low-alloy structural steel grade demonstrates excellent atmospheric corrosion resistance. It finds frequent usage in outdoor structures like bridges and buildings.
4. ASTM A709: Commonly employed in bridge construction, this high-strength, low-alloy structural steel grade offers outstanding strength, weldability, and toughness, making it ideal for demanding structural applications.
5. ASTM A105: This low-carbon steel grade possesses good strength and impact resistance, making it suitable for applications necessitating high strength and ductility, such as heavy equipment and machinery construction.
These examples represent a limited selection of carbon steel round bar grades available for structural applications. The selection of an appropriate grade depends on factors including desired strength, weldability, machinability, and corrosion resistance. It is advisable to consult with a steel supplier or engineer to determine the most suitable grade for a specific application.
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