Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar System 1

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar System 2

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar System 3

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar System 4

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 3 m.t.

Supply Capability:: 100000 m.t./month

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Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Details Information of Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Name	8620H 40CrNiMoA 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

Carbon structure round bar	Q195 Q235A Q235B 10# 20#-55# S45CB
Low alloy high strength round bar	Q345A/Q345C/Q345D Q345B Q345E
Alloy structure round bar	SAE51B20 20Cr 40Cr 40CrV 20CrMo/30CrMo/35CrMo/42CrMo 20CrMoA/30CrMoA/35CrMoA/42CrMoA/42Cr ML20CrMo/ML30CrMo/ML35CrMo/ML42CrMo B7/SCM435-440 20MnTiB 20CrMnMo 20CrMoH 42CrMoH 40MnB/40MnBH 30Mn2-40Mn2 27SiMn 50CrVA 30CrMnTi
Pinion steel	20CrMnTi 20CrMnTiH 20CrMnTiHCS/20CrMnTiHLD Q20CrMnTi-1/Q20CrMnTi-2
Sucker rod	20-35CrMoA
Free-cutting steel	GT1215S
Spring steel	60Si2MnA 65Mn
Ball bearing steel	GCr15

Chemical Composition of Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

C	Si	Mn	P	S	Cr	Ni	Cu

0.17-0.24	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

Tensile strength (σb/MPa)	Yield strength (σb/MPa)	Elongation (δ5/%)
≥410(42)	≥245(25)	≥25

Company Introduction of Special Steel 8620H 40CrNiMoA Iron Steel Round 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.

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Certificates of Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Packaging & Delivery of Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

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

Products show of Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

Special Steel 8620H 40CrNiMoA Iron Steel Round Bar

FAQ

Are you a trading company or manufacturer?	Manufacturer
What’s the MOQ?	3 metric ton
What’s your delivery time?	15-35 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.
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
Where are your Market?	Covering more than 160 countries in the world

Q:What are the main applications of special steel in the defense aircraft?: Special steels are used in defense aircraft for various critical applications such as manufacturing aircraft components, structures, and armor. These steels possess exceptional strength, durability, and resistance to corrosion and heat, making them suitable for challenging environments. Special steels find applications in components like landing gears, engine parts, rotor blades, and missile systems, where their high performance and reliability are essential for ensuring the safety and effectiveness of defense aircraft.

Q:What are the challenges in heat treatment of special steel?: Some challenges in the heat treatment of special steel include achieving the desired hardness and strength without compromising other properties, such as toughness and corrosion resistance. Special steels often have complex compositions, which can make it difficult to accurately control the heat treatment process. Additionally, heat treatment of special steel can be time-consuming and costly due to the need for precise temperature and time control, as well as the potential for distortion or cracking during the heat treatment process.

Q:What are the common applications of stainless special steel?: Stainless special steel is commonly used in a wide range of applications due to its unique properties and characteristics. Some of the most common applications include kitchenware and cookware, cutlery, medical equipment, automotive parts, aerospace components, construction materials, and various industrial machinery. Its corrosion resistance, high strength, durability, and aesthetic appeal make it a preferred choice in these industries.

Q:What are the different methods of measuring the hardness of special steel?: There are several methods available for measuring the hardness of special steel. These methods can be categorized into two main categories: destructive and non-destructive testing. 1. Rockwell Hardness Test: This is a widely used destructive testing method that measures the depth of penetration of an indenter into the steel surface. The Rockwell hardness test provides a hardness value based on the resistance of the steel to indentation. It is a simple and quick method that requires minimal sample preparation. 2. Brinell Hardness Test: Another destructive testing method, the Brinell hardness test, involves applying a known load to a hardened steel ball and measuring the diameter of the indentation left on the steel surface. The hardness value is determined based on the ratio of the applied load to the surface area of the indentation. 3. Vickers Hardness Test: This is a micro-indentation test that utilizes a diamond pyramid-shaped indenter. The Vickers hardness test measures the diagonal length of the indentation left on the steel surface and calculates the hardness value based on the applied load. 4. Knoop Hardness Test: Similar to the Vickers test, the Knoop hardness test is a micro-indentation method that uses a diamond pyramid-shaped indenter. However, instead of measuring the diagonal length of the indentation, it measures the length of the long axis. This test is particularly useful for measuring the hardness of thin steel samples or steel coatings. 5. Ultrasonic Hardness Test: This non-destructive testing method measures the hardness of steel by analyzing the propagation of ultrasonic waves through the material. The hardness value is determined based on the correlation between the velocity of the waves and the hardness of the steel. 6. Magnetic Hardness Test: This non-destructive testing method utilizes magnetic properties to measure the hardness of steel. It involves applying a magnetic field to the steel and measuring the magnetic response. The hardness value is determined based on the correlation between the magnetic response and the hardness of the steel. It is important to note that each method has its advantages and limitations, and the choice of method depends on factors such as the type of steel, the required accuracy, the sample size, and the available equipment and expertise.

Q:What are the different methods of testing special steel for quality assurance?: There are several methods of testing special steel for quality assurance, including mechanical testing, chemical analysis, non-destructive testing, and metallographic analysis. Mechanical testing involves measuring the steel's strength, hardness, and toughness through techniques such as tensile testing, impact testing, and hardness testing. Chemical analysis helps determine the composition and impurities in the steel through methods like spectroscopy and elemental analysis. Non-destructive testing methods like ultrasonic testing, magnetic particle testing, and radiographic testing are used to detect any defects or flaws in the steel without causing damage. Metallographic analysis involves examining the steel's microstructure through techniques like optical microscopy and electron microscopy to assess its internal structure and identify any potential issues.

Q:Can special steel be used for making renewable energy equipment?: Yes, special steel can be used for making renewable energy equipment. Special steel alloys are often used in the manufacturing of components such as wind turbine towers, solar panel frames, and hydroelectric power plant structures. These alloys possess high strength, durability, corrosion resistance, and other properties necessary for withstanding the harsh environmental conditions and demands of renewable energy systems.

Q:How does special steel resist oxidation?: The outstanding resistance to oxidation exhibited by special steel is well-known. This is mainly attributed to the inclusion of elements like chromium, nickel, and manganese in its composition. These elements combine to create a passive film, known as a protective layer, on the steel's surface. This film effectively shields the steel from oxygen and moisture. Chromium is the principal element responsible for the oxidation resistance of special steel. It undergoes a reaction with atmospheric oxygen, resulting in the formation of a thin layer of chromium oxide on the steel's surface. This oxide layer is exceptionally stable and prevents any further oxidation of the underlying metal. It acts as a protective shield, hindering the penetration of oxygen and moisture into the steel, which could otherwise lead to corrosion or rusting. Moreover, nickel and manganese also contribute to the oxidation resistance of special steel. They assist in stabilizing the passive film created by chromium oxide and enhance its protective properties. These elements also bolster the steel's ability to withstand high temperatures and corrosive environments. Furthermore, the composition and processing techniques employed in the production of special steel play a vital role in its oxidation resistance. The steel is often subjected to heat treatment processes, such as annealing or quenching, which further enhance its resistance to corrosion. Through meticulous control of alloying elements and precise heat treatment procedures, a robust and long-lasting passive film is formed. In conclusion, special steel's ability to resist oxidation is primarily due to the presence of chromium, nickel, and manganese, which collaborate to create a protective layer on its surface. This passive film acts as a barrier against oxygen and moisture, effectively preventing corrosion and rusting. Additionally, the composition and processing techniques utilized during production significantly contribute to the exceptional oxidation resistance of special steel.

Q:What are the different non-destructive testing techniques used for special steel?: There are several non-destructive testing (NDT) techniques that are commonly used for special steel to ensure its quality and integrity without causing any damage. These techniques are essential in industries where special steel is used, such as aerospace, automotive, and construction, to ensure that the material meets the required specifications and standards. Some of the commonly used NDT techniques for special steel are: 1. Ultrasonic Testing (UT): This technique involves the use of high-frequency sound waves to detect internal flaws, such as cracks, voids, or inclusions, in special steel. UT is highly effective in detecting subsurface defects and is widely used due to its versatility and accuracy. 2. Magnetic Particle Testing (MT): MT is a technique that uses magnetic fields and iron particles to detect surface or near-surface defects in special steel. It is particularly useful in identifying defects like cracks, seams, or laps, as the magnetic particles will accumulate at these locations, making them visible under proper lighting conditions. 3. Liquid Penetrant Testing (PT): PT is a widely-used method for detecting surface defects in special steel. It involves applying a liquid penetrant to the surface of the material, which seeps into any surface cracks or defects. After a specified time, the excess penetrant is removed, and a developer is applied to make the defects visible. 4. Eddy Current Testing (ET): ET utilizes electromagnetic induction to detect surface or near-surface defects in special steel. It is particularly useful in detecting cracks, corrosion, or metal loss in conductive materials. ET is a fast and accurate method, making it suitable for high-speed production environments. 5. Radiographic Testing (RT): RT involves the use of X-rays or gamma rays to examine the internal structure of special steel. It can detect various defects, including porosity, inclusions, and cracks. RT provides detailed images that help identify the location, size, and severity of defects. 6. Visual Testing (VT): VT is a simple yet crucial technique that involves a visual examination of the surface of special steel. It helps identify surface defects like scratches, dents, or corrosion. Although VT is not as sensitive as other NDT techniques, it is often used as a preliminary inspection method. Each of these non-destructive testing techniques has its own advantages and limitations. The selection of the appropriate technique depends on factors such as the type and size of the special steel, the required inspection depth, and the specific defects that need to be detected. By using a combination of these techniques, manufacturers and inspectors can ensure the quality and reliability of special steel products.

Q:How does special steel contribute to the efficiency of industrial equipment?: Special steel contributes to the efficiency of industrial equipment by offering superior strength, durability, and resistance to wear and tear. Its unique properties enable the production of lighter and more compact equipment, resulting in reduced energy consumption, increased productivity, and improved overall performance. Additionally, special steel's high corrosion resistance helps to prolong the lifespan of industrial equipment, reducing maintenance costs and enhancing operational efficiency.

Q:What are the different methods for tempering special steel?: There are several different methods for tempering special steel, including air tempering, oil tempering, water tempering, and salt bath tempering. Air tempering involves heating the steel to a specific temperature and then allowing it to cool in air. Oil tempering involves heating the steel to a specific temperature and then quenching it in oil. Water tempering is a similar process, but the steel is quenched in water instead. Salt bath tempering involves heating the steel in a molten salt bath to achieve the desired tempering temperature. Each method has its own advantages and is chosen based on the specific properties and requirements of the steel being tempered.

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