Grade SAE 4140 Steel Price_Steel Round Bar Dimension

Grade SAE 4140 Steel Price_Steel Round Bar Dimension System 1

Grade SAE 4140 Steel Price_Steel Round Bar Dimension System 2

Grade SAE 4140 Steel Price_Steel Round Bar Dimension System 3

Grade SAE 4140 Steel Price_Steel Round Bar Dimension System 4

Grade SAE 4140 Steel Price_Steel Round Bar Dimension

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Min Order Qty:: 3 m.t.

Supply Capability:: 10000 m.t./month

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Grade SAE 4140 Steel Price_Steel Round Bar Dimension

Details of Grade SAE 4140 Steel Price_Steel Round Bar Dimension

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

Specification of SAE 4140 Steel Price_Steel Round Bar Dimension

1.Size of 4140 Steel Round Bar
Round bar		Diameter(mm)			Length (mm)
		20~800			3000~9000
Plate		Thickness(mm)			Width (mm)		Length (mm)
		Max:800			Max:2200		Max:9000
The specification can be customized.
2.Chemical Compositons
Grade	C	Si	Mn	P	S	Cr	Mo	Ni
42CrMo	0.38~0.45	0.17~0.37	0.50~0.8	≤0.035	≤0.035	0.9~1.2	0.15-0.25	≤0.3
4140	0.40~0.45	0.15~0.35	0.75~1.0	≤0.035	≤0.040	0.8~1.1	0.15-0.25	-
SCM44	0.38~0.43	0.15~0.35	0.60~0.9	≤0.030	≤0.030	0.9~1.2	0.15-0.30	≤0.25
1.7225	0.38~0.45	≤0.40	0.60~0.9	≤0.025	≤0.035	0.9~1.2	0.15-0.30
3.Features of 4140 alloy steel
1. Chromium molybdenum alloy steel
2. Slightly higher carbon content then 4130
3. Greater strength and heat treatment
4.Typical Applications
1. Applications in the oil and gas sector
2. Connection rods, collets, conveyor pins,
3. Gears, stem assemblies,
4. Pump shafts and tool holders

CNBM Introduction of SAE 4140 Steel Price_Steel Round Bar Dimension Supplier

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.

Grade SAE 4140 Steel Price_Steel Round Bar Dimension

After-sale service

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.
For any problem, please kindly contact us at any your
convenient time, we’ll reply you in our first priority within 24 hours

Advantages

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

Packaging & Delivery SAE 4140 Steel Price_Steel Round Bar Dimension

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

Products Show

Grade SAE 4140 Steel Price_Steel Round Bar Dimension

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 challenges in machining special steel alloys?: Machining special steel alloys presents several challenges. These alloys are typically harder and more brittle than regular steel, making them more difficult to cut and shape. They also tend to generate higher heat during the machining process, increasing the risk of tool wear and thermal damage. Special steel alloys may also have complex microstructures and chemical compositions, which can result in uneven material removal and unpredictable machining behavior. Additionally, these alloys often have lower machinability ratings, requiring specialized cutting tools and techniques to achieve desired results. Overall, the challenges in machining special steel alloys lie in their hardness, heat generation, complex microstructures, and lower machinability, necessitating expertise and careful consideration during the machining process.

Q:What are the specific requirements for special steel used in the marine propeller industry?: The special steel used in the marine propeller industry must meet specific requirements to ensure optimal performance and durability in harsh marine environments. Some of the key requirements include: 1. Corrosion Resistance: Marine propellers are constantly exposed to saltwater, which can cause corrosion. Therefore, special steel used in the marine propeller industry must have high resistance to corrosion, preventing the formation of rust and maintaining the propeller's integrity over time. 2. Strength and Toughness: Marine propellers are subjected to high mechanical stresses and impacts, especially in rough sea conditions. The special steel used must possess high strength and toughness to withstand these forces without deformation or failure. 3. Fatigue Resistance: Propellers experience cyclic loading due to rotational forces, which can lead to fatigue failure over time. The special steel should have excellent fatigue resistance to withstand millions of load cycles without developing cracks or fractures. 4. Weldability: Propellers are often manufactured in segments and then welded together. The special steel used must be easily weldable, ensuring strong and reliable joints that can withstand the propeller's operational stresses. 5. Heat Resistance: Propellers generate significant heat due to friction and propulsion forces. The special steel should have good heat resistance to prevent deformation or loss of mechanical properties at elevated temperatures. 6. Machinability: Special steel used in the marine propeller industry should be readily machinable to allow for precise shaping and finishing of complex propeller blade designs. 7. Non-Magnetic Properties: Many modern ships utilize magnetic navigation systems and sensors. Therefore, the special steel used in propellers should have low magnetic permeability to minimize interference with these systems. Meeting these specific requirements ensures that the special steel used in the marine propeller industry can withstand the challenging conditions of seawater, provide efficient propulsion, and maintain its structural integrity throughout the propeller's lifespan.

Q:How does special steel contribute to the shipbuilding industry?: Special steel contributes to the shipbuilding industry in several ways. Firstly, special steel offers enhanced strength and durability, making it an ideal material for constructing various components of ships. This includes the hull, decks, bulkheads, and other structural elements that need to withstand the harsh marine environment and heavy loads. Special steel also provides excellent resistance to corrosion and abrasion, which is crucial for ships that are constantly exposed to saltwater and other corrosive agents. This ensures that the ship remains in good condition for a longer lifespan, reducing maintenance costs and increasing operational efficiency. Moreover, special steel offers superior weldability and formability, allowing shipbuilders to create complex shapes and structures with ease. This flexibility in design enables the construction of innovative and efficient ship designs, such as large container vessels, offshore oil rigs, and naval warships. In addition, special steel is often used for manufacturing critical components like propeller shafts, rudders, and engine parts. These components require high strength, toughness, and resistance to fatigue, as they are subjected to extreme forces and vibrations during operation. Special steel's unique properties ensure the reliability and performance of these crucial ship parts. Furthermore, special steel contributes to the shipbuilding industry by enabling the construction of lightweight ships without compromising strength and safety. This helps reduce fuel consumption, leading to improved energy efficiency and lower greenhouse gas emissions. As environmental regulations become increasingly stringent, special steel plays a vital role in making ships more sustainable and eco-friendly. Overall, special steel is an essential material in the shipbuilding industry due to its exceptional strength, durability, corrosion resistance, weldability, formability, and lightweight properties. Its use not only ensures the safety and longevity of ships but also facilitates the development of advanced ship designs and contributes to the industry's overall sustainability.

Q:What are the common challenges in forging special steel?: Forging special steel poses several common challenges that manufacturers and engineers must address in order to achieve desired outcomes. One of the primary challenges in forging special steel is maintaining precise temperature control throughout the process. Special steels often have specific heat treatment requirements, and any deviation from the recommended temperature range can adversely affect the final properties of the material. Achieving and sustaining the right temperature is crucial to ensure desired mechanical properties like strength, hardness, and toughness. Another challenge in forging special steel is controlling the cooling rate during quenching. Quenching is a critical step in the heat treatment process that helps to achieve the desired hardness and strength in special steels. However, rapid cooling can lead to the formation of undesirable microstructures or even cracking. Therefore, carefully managing the cooling rate is essential to avoid these issues and ensure optimal material properties. Additionally, shaping special steels through forging can be challenging due to their high strength and hardness. These materials are often more difficult to deform compared to regular steels, requiring higher forging pressures and specialized equipment. The resistance to deformation can lead to increased wear on the forging dies, requiring frequent maintenance and replacement. Furthermore, special steels may contain alloying elements that can affect their forgeability. Some alloying elements can promote grain growth, which can reduce the mechanical properties of the material. Finding the right balance of alloying elements and optimizing the forging process parameters is crucial to achieve the desired microstructure and properties in the final product. Lastly, ensuring consistency and repeatability in the forging process can be a challenge. Special steels are often produced in smaller quantities or for specific applications, making it important to maintain process control and quality assurance. Proper documentation, monitoring, and quality control measures need to be implemented to ensure that the forged special steel meets the desired specifications and performance requirements. Overall, forging special steel requires careful attention to temperature control, cooling rate during quenching, shaping difficulties, alloying elements, and maintaining consistency. Addressing these challenges through proper process control and optimization is crucial to obtain high-quality special steel products with the desired mechanical properties and performance characteristics.

Q:What is the hardness of special steel?: The hardness of special steel can vary depending on its composition and specific heat treatment, but generally, special steel is known for its high hardness and excellent strength properties.

Q:How does special steel perform in high-frequency applications?: Special steel, also known as high-speed steel (HSS), performs exceptionally well in high-frequency applications. This type of steel is specifically designed to withstand the extreme heat and stress generated in high-speed machining operations. The unique composition of special steel, which typically includes elements such as tungsten, molybdenum, cobalt, and vanadium, provides it with remarkable hardness, toughness, and wear resistance. These properties make it highly suitable for use in high-frequency applications where the material is subjected to rapid cutting speeds and frequent abrasion. Due to its excellent hardness, special steel can maintain its cutting edge even at elevated temperatures, ensuring superior performance in high-frequency applications. It exhibits minimal deformation or loss of cutting efficiency, which results in improved productivity and extended tool life. Moreover, its exceptional wear resistance allows it to withstand the constant friction and heat generated during high-speed machining operations, preventing premature tool failure. Furthermore, special steel possesses excellent thermal conductivity, which helps dissipate the heat generated during high-frequency applications. This feature is crucial for maintaining dimensional stability and preventing the material from warping or distorting under extreme temperatures. As a result, special steel tools can maintain their precision and accuracy even during prolonged high-frequency operations. In summary, special steel is highly effective in high-frequency applications due to its exceptional hardness, toughness, wear resistance, and thermal conductivity. Its ability to withstand extreme heat and stress, while maintaining cutting performance and dimensional stability, makes it the preferred choice for industries such as aerospace, automotive, and manufacturing where high-speed machining is essential.

Q:What are the different welding techniques used for special steel?: There are several welding techniques used for special steel, including gas metal arc welding (GMAW), shielded metal arc welding (SMAW), flux-cored arc welding (FCAW), and tungsten inert gas welding (TIG). These techniques are chosen based on factors such as the type of special steel, its thickness, and the desired weld characteristics. Each technique has its own advantages and limitations, and the selection depends on the specific requirements of the welding application.

Q:What are the requirements for special steel used in high-pressure applications?: The requirements for special steel used in high-pressure applications typically include high strength, excellent resistance to corrosion and oxidation, good weldability, and the ability to withstand extreme temperatures and pressures without deformation or failure. Additionally, the steel should have a high level of toughness to withstand impact and fatigue loads, as well as good dimensional stability to ensure proper sealing and performance in high-pressure environments.

Q:What are some common applications of special steel?: Special steel, known by other names such as alloy steel or tool steel, possesses unique properties that set it apart from traditional carbon steel. Its composition has been specifically tailored to enhance its performance, making it highly sought after in a wide range of industries. One prominent use for special steel is in the production of cutting tools. Drills, saws, and milling cutters, which undergo rigorous cutting and machining operations, require exceptional hardness, wear resistance, and toughness. Special steel provides these qualities, enabling the tools to maintain their sharpness and cutting efficiency over extended periods of time. The automotive industry also heavily relies on special steel. Engine components such as crankshafts, camshafts, and connecting rods necessitate high levels of strength, fatigue resistance, and heat resistance. Special steel's superior mechanical properties make it an ideal choice for these critical engine parts, ensuring both durability and optimal performance. Special steel is also extensively used in the construction of molds and dies. Injection molds, extrusion dies, and forging dies, which are vital in shaping materials for various products like plastic components, metal parts, and automotive body panels, are commonly fabricated using special steel. Its exceptional thermal conductivity, wear resistance, and toughness allow for efficient and precise shaping processes. The aerospace industry also benefits from the use of special steel. Aircraft components, including landing gears, turbine blades, and structural parts, require materials with high strength, heat resistance, and corrosion resistance. Special steel's ability to withstand the extreme conditions encountered in aviation guarantees the safety and reliability of aircraft. Furthermore, special steel plays a crucial role in the energy sector. Turbine blades for power generation, subjected to high temperatures and pressures, demand materials with excellent creep resistance and thermal stability. Special steel's ability to endure these harsh environments makes it an indispensable material in the construction of power plants. To summarize, special steel's exceptional properties make it a valuable material in various industries. Its applications span from cutting tools and automotive components to molds and dies, aerospace parts, and power generation equipment. The versatility of special steel allows for the production of high-quality, durable, and efficient products across diverse sectors.

Q:How is free-cutting steel used in the production of precision components?: Free-cutting steel is used in the production of precision components due to its enhanced machinability. This type of steel contains additives such as sulfur, lead, or bismuth, which help in breaking the chips during machining, resulting in improved cutting performance. This makes it easier for manufacturers to achieve high precision and accuracy when shaping and forming the steel into intricate components. Additionally, free-cutting steel reduces tool wear and increases production efficiency, making it a preferred choice in industries requiring precise and complex parts, such as automotive, aerospace, and medical.

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