Grade AISI 4140 _42CrMo4 Steel Round Bar

Grade AISI 4140 _42CrMo4 Steel Round Bar System 1

Grade AISI 4140 _42CrMo4 Steel Round Bar System 2

Grade AISI 4140 _42CrMo4 Steel Round Bar System 3

Grade AISI 4140 _42CrMo4 Steel Round Bar System 4

Grade AISI 4140 _42CrMo4 Steel Round Bar

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 3 m.t.

Supply Capability:: 10000 m.t./month

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Grade AISI 4140 _42CrMo4 Steel Round Bar

Details of Grade AISI 4140 _42CrMo4 Steel Round 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

Specification of Grade AISI 4140 _42CrMo4 Steel Round Bar

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 Grade AISI 4140 _42CrMo4 Steel Round Bar 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 AISI 4140 _42CrMo4 Steel Round Bar

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CNBM provides the services and support you need for every step of our cooperation. We’re the business partners you
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For any problem, please kindly contact us at any your
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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 Grade AISI 4140 _42CrMo4 Steel Round Bar

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

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Grade AISI 4140 _42CrMo4 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 challenges in machining special steel with complex geometries?: Machining special steel with complex geometries poses several challenges. Firstly, the hardness and toughness of special steel can make it difficult to cut, requiring specialized tools and techniques. Additionally, the intricate geometries of the components can pose challenges in terms of accessing and maneuvering the cutting tools, which may require specialized equipment or processes. Furthermore, the heat generated during machining can affect the properties of special steel, such as its hardness and dimensional stability, requiring careful monitoring and control. Overall, machining special steel with complex geometries demands expertise, precision, and adaptability to overcome these challenges.

Q: How does special steel contribute to the agriculture industry?: Special steel plays a crucial role in the agriculture industry by providing durable and high-performance materials for various agricultural machinery and equipment. These steels are specifically designed to withstand the harsh conditions and heavy workloads encountered in farming operations, resulting in increased efficiency and productivity. One of the primary applications of special steel in agriculture is in the manufacturing of tillage equipment such as plows, cultivators, and harrows. These implements require robust materials that can withstand the abrasion and impact of soil and rocks. Special steel provides the necessary strength and hardness to ensure that these implements can effectively break up the soil, improve soil quality, and prepare the land for planting. Additionally, special steel is extensively used in the production of machinery for planting, harvesting, and processing agricultural products. For instance, combine harvesters, which are vital for large-scale crop harvesting, heavily rely on special steel components for their cutting systems, threshing mechanisms, and grain handling systems. By using special steel, these machines can efficiently handle the demanding tasks of crop collection, separation, and storage. Moreover, special steel contributes to the agriculture industry by enhancing the longevity and reliability of equipment. Agricultural machinery operates in challenging environments that expose them to corrosive elements, moisture, and extreme temperatures. Special steel, often coated with protective layers, offers resistance against corrosion, rust, and wear, ultimately extending the lifespan of agricultural equipment. Furthermore, the use of special steel in the manufacturing of machinery leads to improved precision and accuracy in agricultural operations. Modern farming techniques increasingly rely on precision agriculture, which involves using advanced technologies to optimize productivity, reduce waste, and conserve resources. Special steel components enable more precise movements, better control, and increased accuracy in machinery, leading to improved efficiency and minimizing waste. Overall, special steel is vital to the agriculture industry as it provides the necessary strength, durability, and precision required for various agricultural machinery and equipment. By utilizing these high-quality materials, farmers can enhance productivity, reduce downtime, and achieve sustainable farming practices.

Q: How does special steel contribute to the food processing aftermarket industry?: Special steel plays a crucial role in the food processing aftermarket industry by providing equipment and components that ensure safety, efficiency, and durability. With its exceptional properties such as corrosion resistance, high strength, and heat resistance, special steel is used to manufacture cutting blades, sieves, conveyors, and other machinery parts. This allows for precise cutting, sieving, and conveying of various food products, maintaining their quality and reducing contamination risks. Overall, special steel enhances the performance and longevity of food processing equipment, enabling the industry to meet stringent hygiene standards and increase productivity.

Q: What are the different surface hardening techniques for special steel parts?: There are several different surface hardening techniques that can be used for special steel parts, each offering unique advantages and characteristics. Some of the most common surface hardening techniques include: 1. Carburizing: Carburizing involves introducing carbon into the surface of the steel part by heating it in a carbon-rich atmosphere. This process creates a hardened outer layer with a high carbon content, while maintaining a tough and ductile core. Carburizing improves wear resistance and increases the overall strength of the part. 2. Nitriding: Nitriding is a process where nitrogen is diffused into the surface of the steel part, forming nitrides. This results in a hard, wear-resistant surface layer with improved fatigue strength. Nitriding can be performed at lower temperatures, reducing the risk of distortion or dimensional changes in the part. 3. Induction Hardening: Induction hardening uses high-frequency induction heating to selectively heat the surface of the steel part. This localized heating is followed by rapid quenching, creating a hardened outer layer. Induction hardening offers precise control over the hardened depth and can be applied to specific areas, enhancing the wear resistance and strength of critical regions. 4. Flame Hardening: Flame hardening involves heating the surface of the steel part using an oxy-acetylene or oxy-propane flame. The heated area is then quickly quenched, resulting in a hardened surface layer. Flame hardening is commonly used for large or irregularly shaped parts and provides excellent wear resistance. 5. Laser Hardening: Laser hardening utilizes a high-intensity laser beam to heat and rapidly cool the surface of the steel part. This process allows for precise control over the hardened area and depth, minimizing distortion and maintaining tight tolerances. Laser hardening is particularly effective for small, complex parts or localized hardening requirements. These surface hardening techniques offer various benefits depending on the specific requirements of the steel part. By choosing the appropriate method, manufacturers can enhance the durability, strength, and performance of special steel parts in diverse applications.

Q: What are the different certifications available for special steel?: Depending on the specific industry and application, there are multiple certifications available for special steel. Some of the well-known certifications are as follows: 1. ISO 9001: This certification ensures that the special steel manufacturer has implemented and maintained a quality management system that adheres to international standards. It signifies the company's dedication to consistently delivering products that meet customer requirements. 2. ISO 14001: This certification focuses on environmental management and guarantees that the special steel manufacturer has adopted eco-friendly practices in their operations. It showcases the company's commitment to reducing their impact on the environment. 3. Certifications by ASME (American Society of Mechanical Engineers): ASME provides several certifications for special steel used in pressure vessels, boilers, and other applications. These certifications ensure that the special steel meets industry-specific quality and safety standards. 4. PED (Pressure Equipment Directive): This certification is mandatory for special steel used in pressure equipment within the European Union. It guarantees that the steel meets specific safety and quality requirements. 5. Certifications by NACE (National Association of Corrosion Engineers): NACE offers certifications for special steel used in corrosive environments. These certifications ensure that the steel possesses the necessary resistance against corrosion and can endure harsh conditions. 6. Certifications by API (American Petroleum Institute): API offers certifications for special steel used in the oil and gas industry. These certifications ensure that the steel meets various quality and performance standards required for different applications in the industry. 7. Certifications by ASTM (American Society for Testing and Materials): ASTM provides various certifications for special steel based on specific standards and specifications. These certifications guarantee that the steel satisfies the required mechanical properties, chemical composition, and other criteria. Manufacturers, suppliers, and end-users should take these certifications into consideration when selecting special steel for their specific applications. These certifications provide confidence and assurance regarding the quality, safety, and performance of the special steel products.

Q: How does special steel contribute to the ductility of products?: Special steel contributes to the ductility of products by offering enhanced mechanical properties such as higher tensile strength and improved toughness. This type of steel is specially formulated with alloying elements that promote grain refinement and uniform microstructure, allowing the material to withstand greater deformation without breaking or cracking. Additionally, special steel often undergoes specific heat treatment processes that further enhance its ductility, ensuring that the final products can be easily shaped, bent, or stretched without compromising their structural integrity.

Q: What are the different methods of surface electropolishing for special steel?: Special steel can undergo surface electropolishing using various methods, each with its unique benefits and applications. 1. Immersion Electropolishing: To achieve a smooth and polished finish, the special steel components are immersed in an electrolyte bath, and a direct current is passed through the solution. This method is ideal for large and complex parts, offering uniform surface improvement on all exposed areas. 2. Electrolytic Electropolishing: By applying a direct current directly to the surface of the special steel component using an electrode, the surface dissolves, resulting in a reflective and smooth finish. This technique allows precise control over the process and is suitable for smaller or intricate parts, targeting specific areas that require improvement. 3. Reverse Pulse Electropolishing: A combination of direct and reverse current pulses is utilized to achieve an exceptional surface finish. The reverse current pulses reduce surface roughness and eliminate embedded particles or contaminants. This method is especially beneficial for special steel components that require enhanced corrosion resistance and improved cleanliness. 4. Magnetic Field-Assisted Electropolishing: Applying a magnetic field to the electropolishing process can enhance the polishing rate and surface finish. The alignment of the electrical current by the magnetic field improves material removal, resulting in a smoother and more uniform surface. This method is preferred for difficult-to-polish special steels or those with complex geometries. 5. Flow-Assisted Electropolishing: By using a flowing electrolyte solution, the electropolishing process is enhanced. The flowing solution aids in removing dissolved material from the surface and prevents the formation of gas bubbles, resulting in a more efficient and smoother polishing. This method is suitable for large or flat special steel components requiring a high-quality surface finish. In conclusion, the choice of the appropriate method for surface electropolishing of special steel depends on specific component requirements, such as size, geometry, and desired surface finish. Each method has its advantages and considerations, and seeking guidance from an experienced electropolishing specialist is advisable to determine the most suitable approach.

Q: How is special steel used in the production of cutting tools?: Special steel is used in the production of cutting tools due to its exceptional strength, hardness, and durability. Its high carbon content and alloying elements enable it to withstand intense pressure, resist wear and abrasion, and maintain sharp edges for longer periods. This makes special steel ideal for manufacturing cutting tools such as saw blades, knives, drills, and chisels, ensuring precise and efficient cutting operations across various industries.

Q: How is the toughness of special steel measured?: The toughness of special steel is typically measured using impact testing methods, such as the Charpy or Izod test. These tests involve measuring the amount of energy absorbed by the steel when it is struck by a pendulum or a falling weight. The higher the energy absorbed, the tougher the steel is considered to be.

Q: What are the different methods of surface grinding for special steel?: There are several methods of surface grinding for special steel, including peripheral grinding, creep feed grinding, and multi-axis grinding.

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