Introduction:
Welcome to our comprehensive guide to our 4140 Seamless Steel Tube. As a leading manufacturer and exporter in China, we are proud to offer a premium quality seamless steel tube that is designed to meet the highest standards of quality and durability. If you are looking for a reliable, high-performance steel tube that can withstand extreme pressure and temperature, you have come to the right place. In this guide, we will introduce you to our 4140 Seamless Steel Tube and provide you with all the information you need to make an informed purchase decision.
What is a Seamless Steel Tube?
A seamless steel tube is a type of pipe that is made by drawing a solid steel billet through a piercing rod to create a hollow tube. The process of creating a seamless steel tube is a technical and complex one that requires a high degree of precision and expertise. Seamless steel tubes are known for their superior strength and durability, and they are used in a wide range of applications, from power generation and hydraulic systems to construction and manufacturing.
Features and Benefits of our 4140 Seamless Steel Tube:
Our 4140 Seamless Steel Tube is a high-quality product that is designed to meet the most demanding industrial applications. Here are some of the key features and benefits of our product:
1. High Strength: Our 4140 Seamless Steel Tube is made from high-grade steel that is known for its exceptional strength and durability. It is designed to withstand high pressure and temperature and is ideal for use in challenging environments.
2. Corrosion Resistance: Our 4140 Seamless Steel Tube is coated with a protective layer that helps to prevent corrosion and rust. This makes it ideal for use in harsh conditions where exposure to the elements can be a concern.
3. Precision Manufacturing: Our 4140 Seamless Steel Tube is made using advanced manufacturing techniques that ensure a high degree of precision and accuracy. This results in a product that is consistent in size, shape, and quality.
4. Versatility: Our 4140 Seamless Steel Tube is suitable for use in a wide range of applications, from hydraulic systems and power generation to construction and manufacturing. It can be easily customized to meet the specific needs of your business.
5. Competitive Pricing: We offer our 4140 Seamless Steel Tube at a competitive price, making it an affordable option for businesses of all sizes.
Applications of our 4140 Seamless Steel Tube:
Our 4140 Seamless Steel Tube is suitable for use in a wide range of applications, including:
1. Power Generation: Our product is ideal for use in power generation facilities, where it can be used in boilers, turbines, and heat exchangers.
2. Hydraulic Systems: Our product is suitable for use in hydraulic systems, where it can be used in pumps, cylinders, and valves.
3. Construction: Our product is ideal for use in construction applications, where it can be used in building frameworks, bridges, and other structures.
4. Manufacturing: Our product is ideal for use in manufacturing, where it can be used in machinery, equipment, and tools.
5. Automotive: Our product is suitable for use in the automotive industry, where it can be used in engine parts, transmission systems, and other critical components.
Conclusion:
Thank you for taking the time to learn more about our 4140 Seamless Steel Tube. We believe that our product is the best on the market and is designed to meet the highest standards of quality and performance. If you are interested in purchasing our product or have any questions, please do not hesitate to contact us. We are always happy to help and look forward to hearing from you.
AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like axles, shafts, bolts, gears and other applications. Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weld ability characteristics.

Equivalent
Country | Japan | Germany | Britain | USA | China | Australia |
Standard | JIS G4105 | DIN 17200 | BS970 | ASTM A29 | GB/T 3077 | AS 1444 |
Grade | SCM440 | 42CrMo4/1.7225 | EN19/709M40 | 4140 | 42CrMo | 4140 |
Chemical Composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.0 | 0.035 | 0.04 | 0.8-1.1 | 0.15-0.25 | |
42CrMo4 | 0.38-0.45 | 0.4 | 0.6-0.9 | 0.035 | 0.035 | 0.9-1.2 | 0.15-0.3 | |
EN19 | 0.35-0.45 | 0.1-0.35 | 0.5-0.8 | 0.05 | 0.05 | 0.9-1.5 | 0.2-0.4 | |
SCM440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | 0.03 | 0.03 | 0.9-1.2 | 0.15-0.3 |
Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
Detailed Images


Seamless steel pipes are perforated from a whole round steel, and steel pipes without
welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and top pipes. According to the cross-sectional shape, seamless steel pipes are divided into two types: round and special-shaped. Special-shaped pipes have square, oval, triangular, hexagonal, melon seed, star, and finned pipes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

Aplication

Packing & Delivery
The steel pipe will be packed in seaworthy packing such as steel strips bundles. If you have any special requests on this, please let us know advanced. We will refer to your email kindly.
1).20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
2).40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
3).40ft HC:12032mm(Lengh)x2352mm(Width)x2698mm(High)

Why choose us?
- Our Alloy Steel Tube products are built to last and provide long-term value.
- We want to take a path of superconventional and leapfrog sustainable development, and form a good pattern of seeking leap with innovation and promoting innovation with leap.
- Our Alloy Steel Tube products are used in a variety of industries and applications.
- We have established a responsible, orderly, continuous and effective quality management system in the whole production process to ensure the quality of 4140 Seamless Steel Tube.
- Our Alloy Steel Tube products are available in a variety of sizes, shapes, and finishes.
- We create value for our customers and build a platform for our employees to realize the value of their lives, so that employees can grow with the enterprise and the enterprise can progress with the society in order to realize the sustainable development strategy of the enterprise and create a better future together.
- Our Alloy Steel Tube products are made to exacting specifications to ensure the highest quality.
- We enhance our brand image through brand planning and strategic planning to improve consumers' awareness and loyalty to our products.
- Our commitment to quality and customer satisfaction is evident in every Alloy Steel Tube product we produce.
- Our goal is to maintain and increase the value of enterprise assets, and at the same time to provide a certain power for social and economic construction.
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