Q345B Straight and Smooth Flat Steel Bar

Q345B Straight and Smooth Flat Steel Bar System 1

Q345B Straight and Smooth Flat Steel Bar System 2

Q345B Straight and Smooth Flat Steel Bar System 3

Q345B Straight and Smooth Flat Steel Bar System 4

Q345B Straight and Smooth Flat Steel Bar

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Loading Port:: Qingdao

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t.

Supply Capability:: 100000 m.t./month

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Q345B Straight and Smooth Flat Steel Bar

Detailed Information of Q345B Straight and Smooth Flat Steel Bar

Name	Steel Round Bar
Shape	Round Bar/Square Bar/Flat Bar/Plate/Wire
Standard	GB/ASTM/SAE/AISI/DIN/JIS/EN/BS
Surface Treatment:	Black/Peeling/Polished/Machined
Delivery Condition:	Hot Rolled or Forged/Peeled or Black Surface
Test	SGS/UT 100% Elements Testing
Certificate:	ISO/Mill Certificate
Service:	24 hours online service /
Service:	more than 20 years trading and manufacture
Quality Assurance:	the third party inspection, such as SGS, BV, TUV…etc. is acceptable
Packaging Details:	Seaworthy Packaging or as per customer's packing instruction

Product Overviews of Q345B Straight and Smooth Flat Steel Bar

Product Name	Typical Grades	Diameter(mm)	Standard Adopted
Carbon Steel	20 (1020/S20C/C22)
	40 (1040/S40C/C40)	Ø16-Ø300
	45 (1045/S45C/C45)
Bearing Steel	GCr9 (51100/SUJ1)
	GCr15 (52100/SUJ2/100Gr6)	Ø12-Ø250
	GCr9SiMn (A485-Gr.1/SUJ3)		GB/SAE/
Cr-Mo Steel	20Cr (5120/SCr420H/20Cr4)		JIS/DIN
	40Cr (5140/SCr440/41Cr4)	Ø12-Ø250
	42CrMo(4140/SCM440/42CrMo4)
Gear Steel	20CrNiMo
	20CrMn(5115/SMnC420/20MnCr5)	Ø16-Ø600
	20CrNiMo(8620/SNCM220/20CrMiMo2)

Company Introduction of Q345B Straight and Smooth Flat Steel Bar

CNBM International Corporation is the most import and export platform of CNBM group(China National Building Material Group Corporation) ,which is a state-owned enterprise, ranked in 270th of Fortune Global 500 in 2015.

With its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high quality series of refractories as well as technical consultancies and logistics solution.

Q345B Straight and Smooth Flat Steel Bar

After-sale service	l CNBM provides the services and support you need for every step of our cooperation. We’re the business partners you can trust; you can relax and get on with doing business.
	l For any problem, please kindly contact us at any your convenient time, we’ll reply you in our first priority within 24 hours

Advantages	l Industry experience over 20 years.
	l Shipment of goods -More than 70 countries worldwide.
	l The most convenient transport and prompt delivery.
	l Competitive price with best service.
	l High technical production line with top quality products.
	l High reputation based on best quality products.

Packaging & Delivery of Q345B Straight and Smooth Flat Steel Bar

Packaging Detail	Sea worthy packing /as per customer's packing instruction
Delivery Detail	15 ~ 40 days after receiving the deposit

Products Show

Q345B Straight and Smooth Flat Steel Bar

FAQ:

Are you a trading company or manufacturer?	Manufacturer
What’s the MOQ?	1000m2
What’s your delivery time?	15-20 days after downpayment received
Do you Accept OEM service?	Yes
what’s your delivery terms?	FOB/CFR/CIF
What's the Payment Terms?	30% as deposit,70% before shipment by T/T
	Western Union acceptable for small amount.
	L/C acceptable for large amount.
	Scrow ,Paybal,Alipay are also ok
Why choose us?	Chose happens because of quality, then price, We can give you both. Additionally, we can also offer professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposals.
Why choose us?
What's your available port of Shipment?	Main Port, China
What’s your featured services?	Our service formula: good quality+ good price+ good service=customer's trust
What’s your featured services?
Where are your Market?	Covering more than 160 countries in the world

Q: How does special steel contribute to reducing product recalls?: Special steel contributes to reducing product recalls by providing improved strength, durability, and resistance to wear and tear. By using special steel in manufacturing processes, products are less likely to experience structural failures, malfunctions, or breakages that could lead to safety hazards or performance issues. This ultimately enhances the overall quality and reliability of products, minimizing the chances of recalls due to material-related defects.

Q: What are the different methods for improving the creep resistance of special steel?: There are several methods for improving the creep resistance of special steel. One of the most common methods is alloying. By adding specific alloying elements such as chromium, molybdenum, and vanadium, the creep resistance of the steel can be significantly enhanced. These alloying elements form stable carbides or nitrides, which act as barriers to the movement of dislocations and reduce the rate of creep deformation. Another method is heat treatment. Through controlled heating and cooling processes, the microstructure of the steel can be refined to improve its creep resistance. Heat treatment techniques like quenching and tempering can help in the formation of a fine-grained structure, which increases the strength and creep resistance of the steel. Surface modification is another approach to improve creep resistance. Techniques like nitriding and carburizing can be used to introduce nitrogen or carbon into the surface layer of the steel, forming a hardened layer that enhances creep resistance. Additionally, the grain size of the steel can be controlled through processes like grain boundary engineering or severe plastic deformation. By refining the grain structure, the movement of dislocations within the material is hindered, leading to improved creep resistance. Lastly, the use of coatings can also enhance the creep resistance of special steel. Coatings like ceramic or metallic coatings can provide a protective layer that reduces the diffusion of impurities and slows down the creep rate. In conclusion, improving the creep resistance of special steel can be achieved through techniques such as alloying, heat treatment, surface modification, grain size control, and the application of coatings. These methods aim to strengthen the steel's microstructure, hinder dislocation movement, and provide protective barriers against creep deformation.

Q: What are the main applications of special steel in the automotive electrical systems?: Special steel is commonly used in automotive electrical systems for various applications such as manufacturing electrical connectors, terminals, and wiring harnesses. It offers high conductivity, corrosion resistance, and superior strength, making it an ideal choice for components that require efficient flow of electrical current and durability in harsh environments. Additionally, special steel can also be utilized in the construction of sensors, relays, and other electronic devices within the automotive electrical system, ensuring reliable performance and longevity.

Q: How does special steel contribute to energy efficiency?: Special steel contributes to energy efficiency in several ways. Firstly, special steel is used in the construction of energy-efficient appliances and equipment, such as refrigerators, air conditioners, and turbines. The high strength and durability of special steel allow for more efficient operation and reduced energy consumption of these devices. Additionally, special steel is utilized in the manufacturing of energy-efficient vehicles, such as hybrid and electric cars. The lightweight yet strong properties of special steel enable the production of lighter vehicles that require less energy to propel, improving fuel efficiency and reducing emissions. Overall, special steel plays a crucial role in enhancing energy efficiency across various industries, contributing to a more sustainable and environmentally friendly future.

Q: How does special steel contribute to reducing maintenance costs?: Special steel contributes to reducing maintenance costs by providing increased durability and resistance to wear and corrosion. Its superior strength and hardness properties make it less susceptible to damage, thereby reducing the frequency of repairs and replacements. Additionally, special steel's ability to withstand extreme temperatures and harsh environmental conditions extends the lifespan of components, reducing the need for frequent maintenance and associated costs.

Q: How does special steel perform in cryogenic conditions?: Special steel performs well in cryogenic conditions due to its low thermal expansion, high strength, and good toughness. It can withstand extreme cold temperatures without becoming brittle or losing its structural integrity, making it suitable for applications such as cryogenic storage tanks, aerospace components, and superconducting magnets.

Q: Can special steel be used in the chemical processing equipment manufacturing industry?: Yes, special steel can be used in the chemical processing equipment manufacturing industry. Special steel is designed to withstand extreme temperatures, corrosion, and pressure, making it an ideal material for manufacturing chemical processing equipment where these factors are prevalent. Its high strength and resistance to chemical reactions make it suitable for various applications such as reactors, storage tanks, and pipelines in the industry.

Q: What are the limitations of welding special steel?: Considerations need to be made for several limitations associated with welding special steel. Firstly, special steel, such as high-alloy steels or heat-resistant steels, often contains higher levels of carbon, which increases the risk of cracking during welding. To minimize this risk, it is necessary to carefully control preheating, interpass temperature, and post-weld heat treatment. Another limitation is the potential for distortion and warping during welding. Special steels have different thermal conductivity and expansion coefficients compared to carbon steels, causing them to dissipate heat more quickly and be more susceptible to distortion. To minimize these effects, proper clamping and fixturing techniques are required. Impurities, such as sulfur and phosphorus, can also affect special steels, leading to the formation of brittle compounds during welding. To prevent this, it is essential to use high-quality filler materials and ensure the cleanliness of the base metal. Specific welding techniques and parameters are often necessary for special steels. For example, some high-alloy steels require slow cooling rates to avoid the formation of brittle microstructures. This may involve specialized cooling methods like post-weld heat treatment or controlled cooling rates. Lastly, the cost of special steels is generally higher than that of carbon steels, which can limit their use in certain applications with budget constraints. Overall, although special steels offer enhanced properties for specific applications, their welding process requires careful consideration and adherence to specific procedures to overcome the limitations related to cracking, distortion, impurities, and cost.

Q: What are the properties of duplex stainless steel?: Duplex stainless steel is a type of stainless steel that possesses a unique combination of properties. It is highly corrosion resistant, making it suitable for use in aggressive environments, such as those containing chlorides or acids. It also exhibits excellent strength and toughness, allowing it to withstand high pressures and temperatures. Additionally, duplex stainless steel has good weldability and formability, making it versatile for various fabrication processes. Its dual-phase microstructure provides a balance of ferrite and austenite, resulting in improved resistance to stress corrosion cracking and higher resistance to pitting and crevice corrosion compared to other types of stainless steel.

Q: How does special steel contribute to the aviation industry?: The aviation industry heavily relies on special steel to guarantee the safety, performance, and efficiency of aircraft. Firstly, critical aircraft components like landing gears, engine parts, and structural elements are manufactured using special steel. These components necessitate materials with exceptional strength, durability, and resistance to fatigue and corrosion. Special steel, such as stainless steel or nickel-based alloys, possesses these properties, ensuring the structural integrity and safety of aircraft. Secondly, special steel allows for the development of lightweight aircraft, a crucial requirement in the aviation industry. By employing high-strength alloys, manufacturers can decrease the weight of aircraft components without compromising their structural integrity. This leads to fuel savings, increased range, and enhanced payload capacity, ultimately improving the efficiency of aircraft operations. Additionally, special steel significantly enhances the performance and reliability of aircraft engines. Steel alloys with excellent mechanical properties and resistance to high temperatures are utilized in producing turbine blades, combustion chambers, and exhaust systems. These components endure extreme temperatures and stress levels, enabling engines to operate efficiently and reliably. Furthermore, special steel contributes to the aviation industry by enabling innovative designs and technologies. With continuous advancements in material science, manufacturers are able to develop new steel alloys with improved properties like enhanced resistance to wear, thermal stability, or fatigue resistance. These innovations unlock new possibilities for aircraft design, performance, and fuel efficiency. In conclusion, the aviation industry heavily relies on special steel to ensure the safety, performance, and efficiency of aircraft. Its utilization in critical components, lightweight construction, engine manufacturing, and technological advancements drives the progress of aviation, resulting in safer, more efficient, and more sustainable air travel.

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