SCM440 Alloy Steel Bar Hot-Rolled Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 500000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
You Might Also Like
Specification
Type:
Alloy Steel
Shape:
Steel Round Bar
SCM440 Alloy Steel Bar Hot-Rolled Bar
Product Description:
1. Commodity: Round steel bar
3. Technical: Hot rolling
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm
5. Packing: In Bundle or according to your requirements.
4. Standard: GB/T 3077-1999(42CrMo) ; JIS SCM440; DIN 42CrMo4 ; ASTM 4140 ; BS 708M40
Chemical Composition(%):
C | Si | Mn | Cr | Mo | Ni | P | S |
0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | ≤0.030 | ≤0.030 | ≤0.030 |
Standard:
GB | AISI | DIN | JIS | ISO |
42CrMo | 4140 | 42CrMo4 | SCM440 | 42CrMo4 |
Available Size:
Rolled round bar | φ20-120mm × L |
Forged round bar | φ130-195mm × L |
Application:used for various large-size or medium-size precision plastic mould and low melting
point alloy parts
The steel with high strength and toughness, hardenability is better also | |||||||
After conditioning treatment quenching deformation of small | |||||||
high fatigue limit and repeated impact resistance |
Quality Certificate:we can supply quality certificate
Packaging:standard seaworthy packing or as customer require
Delivery: In 7-10 days after we receive 30% deposite
Product show:
- Q:Can special steel be used in construction?
- Yes, special steel can definitely be used in construction. Special steel refers to steel alloys that have been specifically designed and manufactured to possess certain properties and characteristics that make them suitable for various applications, including construction. One of the most common types of special steel used in construction is known as structural steel. This type of steel is specifically designed to have higher strength, durability, and flexibility compared to regular carbon steel. Structural steel is often used in the construction of buildings, bridges, and other infrastructure projects due to its ability to withstand heavy loads and resist external forces such as wind, earthquakes, and impact. Special steel also offers other advantages in construction. For example, stainless steel is commonly used in the construction of architectural features and building facades due to its corrosion resistance and aesthetic appeal. Additionally, weathering steel, which forms a protective rust-like coating when exposed to the elements, is often used in outdoor structures and bridges to eliminate the need for regular painting and maintenance. Furthermore, special steel can be tailored to meet specific requirements in construction projects. For instance, high-strength low-alloy (HSLA) steel is used in the construction of tall buildings and structures to reduce weight while maintaining structural integrity. This allows for more efficient use of materials and cost savings. In summary, special steel is widely used in construction due to its superior strength, durability, corrosion resistance, and other desirable properties. Its versatility allows for the optimization of construction projects, ensuring safety, longevity, and cost-effectiveness.
- Q:What are the different methods for case hardening special steel?
- Case hardening special steel can be achieved through various methods, each with its own set of advantages and applications. 1. Carburizing: By subjecting the steel to high temperatures within a carbon-rich environment, a durable and resistant outer layer is formed as carbon atoms diffuse into the surface. Gas carburizing, pack carburizing, or liquid carburizing are some techniques employed for this process. 2. Nitriding: Steels with high alloy content benefit from nitriding, wherein the steel is heated in an environment abundant in nitrogen. This leads to the formation of a tough and corrosion-resistant layer as nitrogen atoms penetrate the surface. 3. Induction hardening: Through induction heating, the surface of the steel is selectively heated, followed by a rapid quenching process. This results in a hardened layer suitable for localized hardening requirements, such as gears or shafts. 4. Flame hardening: Large parts or components that are challenging to treat with other methods can be effectively hardened through the application of a high-temperature flame to the steel surface, followed by rapid cooling. 5. Laser hardening: Achieving precision and localized hardening, laser hardening involves the use of a laser beam to heat and harden specific areas of the steel. This method allows for precise control over the depth and hardness of the hardened layer. The selection of a case hardening method depends on various factors, including the desired hardness, the size and shape of the part, and the specific requirements of the application. Each method possesses its own advantages and limitations.
- Q:How does special steel contribute to the power generation aftermarket industry?
- Special steel plays a crucial role in the power generation aftermarket industry by providing enhanced strength, durability, and corrosion resistance to critical components such as turbine blades, generator rotors, and boiler tubes. These advanced steel alloys enable power plants to operate at higher temperatures and pressures, resulting in increased efficiency and power output. Additionally, special steel's ability to withstand extreme conditions helps to reduce maintenance and downtime, ensuring reliable and uninterrupted power generation.
- Q:Can special steel be used in the manufacturing of tools?
- Yes, special steel can be used in the manufacturing of tools. Special steel, also known as alloy steel, is specifically designed to have enhanced properties such as high strength, hardness, and resistance to wear and corrosion. These characteristics make it an ideal material for the production of durable and high-performance tools used in various industries, including automotive, construction, and machinery.
- 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 specific requirements for special steel used in the oil and gas pipeline industry?
- The specific requirements for special steel used in the oil and gas pipeline industry are dictated by the harsh operating conditions and the need for high performance and reliability. Some of the key requirements include: 1. Corrosion resistance: Special steel used in the oil and gas pipeline industry must possess excellent resistance to corrosion, as pipelines are exposed to various corrosive elements such as moisture, gases, and chemicals. This helps to prevent the degradation or failure of the pipeline due to corrosion. 2. High strength: The steel used in pipelines must have high tensile strength to withstand the high pressure and stress that it experiences during transportation of oil and gas. This ensures the pipeline's structural integrity and prevents leaks or bursts. 3. Toughness and impact resistance: The steel must be able to absorb energy and resist fracture when subjected to sudden impact or external forces. This is crucial for maintaining pipeline integrity and preventing accidents or ruptures. 4. Low temperature toughness: As pipelines often operate in cold environments, the steel must exhibit excellent low-temperature toughness to prevent brittle fracture. This ensures that the pipeline remains ductile and resistant to failure even at extremely low temperatures. 5. Weldability: Special steel used in pipelines should be easily weldable to facilitate the construction and repair of pipelines. Good weldability ensures strong and reliable joints that can withstand the stress and pressure during operation. 6. Resistance to hydrogen-induced cracking: Steel used in the oil and gas pipeline industry should have high resistance to hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC). These types of cracks can occur when hydrogen or sulfide ions penetrate the steel, leading to catastrophic failure. Resistance to these types of cracking is crucial for pipeline safety. 7. Compliance with industry standards: Special steel used in the oil and gas pipeline industry must meet specific industry standards and regulations. These standards ensure that the steel meets the required mechanical properties, chemical composition, and manufacturing processes necessary for safe and reliable pipeline operation. Overall, the specific requirements for special steel used in the oil and gas pipeline industry are aimed at ensuring corrosion resistance, high strength, toughness, low-temperature performance, weldability, resistance to cracking, and compliance with industry standards. These requirements are essential for maintaining the integrity and safety of oil and gas pipelines.
- Q:What are the properties of special steel?
- Special steel has several unique properties that set it apart from regular steel. First and foremost, it is known for its exceptional strength and durability. Special steel is often alloyed with other elements such as chromium, nickel, or molybdenum, which enhance its hardness and corrosion resistance. Additionally, this type of steel has high temperature resistance, making it suitable for applications that involve extreme heat or pressure. Special steel also exhibits excellent machinability, weldability, and formability, allowing for easy shaping and processing. Overall, its remarkable properties make special steel a preferred choice in industries such as automotive, aerospace, and construction.
- Q:What are the different surface defects in special steel?
- Special steel can experience various surface defects. Some common defects include: 1. Scale, which is a layer of oxide that forms on the steel's surface during manufacturing. This can be caused by high temperatures or improper cooling, leading to a flaky or powdery appearance. The presence of scale can impact the quality and appearance of the steel. 2. Pitting refers to the development of small holes or depressions on the steel surface. It can be caused by corrosion, inadequate cleaning or surface preparation, or exposure to harsh environments. Pitting weakens the steel and makes it more prone to further corrosion. 3. Scratches are physical marks or indentations on the steel's surface. They can occur during handling, transportation, or processing. Scratches affect the integrity and appearance of the steel, often requiring repair or removal. 4. Roll marks are impressions or patterns left on the steel surface during the rolling process. Uneven pressure or improper alignment of rolling equipment can cause these marks, appearing as lines, grooves, or ridges. Roll marks impact the smoothness of the surface and may necessitate additional processing or polishing for removal. 5. Inclusions are foreign particles or substances embedded within the steel. They result from impurities in raw materials or contamination during manufacturing. Inclusions weaken the steel and have the potential to cause cracks or fractures. 6. Decarburization refers to the loss of carbon from the steel's surface layer. This can occur during heating or annealing processes, resulting in reduced hardness and strength. Decarburization is undesirable in special steel as it negatively affects performance. These are just a few examples of the surface defects that can occur in special steel. It is crucial to identify and address these defects to ensure the quality and performance of the steel product.
- Q:How does electrical steel minimize energy losses in electrical devices?
- Electrical steel minimizes energy losses in electrical devices due to its unique magnetic properties. It is specifically designed to have low electrical resistance and high magnetic permeability, allowing it to efficiently conduct and transfer electrical energy while reducing heat generation and energy wastage. This enables electrical devices, such as transformers and motors, to operate more efficiently and effectively, thus minimizing energy losses.
- Q:How does special steel perform in abrasive environments?
- Special steel is specifically designed to perform exceptionally well in abrasive environments. Its unique composition and manufacturing process make it highly resistant to wear, corrosion, and impact caused by abrasive materials. It maintains its strength, durability, and performance even under extreme conditions, making it an ideal choice for applications such as mining, construction, and manufacturing industries where abrasive environments are prevalent.
1. Manufacturer Overview |
|
|---|---|
| Location | |
| Year Established | |
| Annual Output Value | |
| Main Markets | |
| Company Certifications | |
2. Manufacturer Certificates |
|
|---|---|
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period | |
3. Manufacturer Capability |
|
|---|---|
| a)Trade Capacity | |
| Nearest Port | |
| Export Percentage | |
| No.of Employees in Trade Department | |
| Language Spoken: | |
| b)Factory Information | |
| Factory Size: | |
| No. of Production Lines | |
| Contract Manufacturing | |
| Product Price Range | |
Send your message to us
SCM440 Alloy Steel Bar Hot-Rolled Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 500000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
Similar products
Hot products
Hot Searches
Related keywords
