Product Details

ASTM A519 4140 Seamless Precision Steel Tube
Steel Tube Chrome Moly Alloy Steel Tube For Industry
Material and Specification
The ASTM A519 4140 Seamless Precision Steel Tube is a high-quality chrome moly alloy steel tube that is widely used in various industries. It is designated under the ASTM A519 specification, which covers seamless carbon and alloy steel mechanical tubing. The material composition and mechanical properties of this tube make it suitable for demanding applications where strength, durability, and corrosion resistance are essential.
The A519 4140 Steel Tube is made from chromium-molybdenum alloy steel, also known as chrome moly steel. This alloy steel contains significant amounts of chromium and molybdenum, which enhance its strength and toughness. The tube is produced using a seamless manufacturing process, ensuring excellent dimensional accuracy and a smooth internal surface.
Key Features
- High Strength: The chromium and molybdenum content in the A519 4140 Steel Tube contribute to its exceptional strength, making it suitable for heavy-duty applications.
- Excellent Machinability: This steel tube exhibits excellent machinability, allowing for precise and efficient machining operations.
- Corrosion Resistance: The presence of chromium provides corrosion resistance, ensuring the tube's durability even in harsh environments.
- Versatile Applications: The A519 4140 Steel Tube is widely used in industries such as oil and gas, automotive, construction, machinery, and more.
Chemical Composition
The chemical composition of the ASTM A519 4140 Seamless Precision Steel Tube is as follows (values are approximate percentages):
Element | Composition |
Carbon (C) | 0.38-0.43 |
Manganese (Mn) | 0.75-1.00 |
Phosphorus (P) | 0.035 max |
Sulfur (S) | 0.040 max |
Silicon (Si) | 0.15-0.35 |
Chromium (Cr) | 0.80-1.10 |
Molybdenum (Mo) | 0.15-0.25 |
Mechanical Properties
The mechanical properties of the ASTM A519 4140 Seamless Precision Steel Tube are provided in the table below:
Property | Value |
Tensile Strength | 850 MPa Min |
Yield Strength | 640 MPa Min |
Elongation | 25% Min |
Hardness | 22 HRC Max (Annealed condition) |
Steel Grade
The A519 4140 Steel Tube falls under the steel grade designation ASTM A519 Grade 4140. This grade signifies the specific composition and mechanical properties of the tube, as outlined by the ASTM standards.
Application
The A519 4140 Steel Tube finds its application in various industries, including:
- Oil and Gas: Used in oil exploration, drilling, and production equipment due to its high strength and resistance to corrosive environments.
- Automotive: Utilized for manufacturing hydraulic cylinders, axles, and other critical components requiring superior strength and durability.
- Construction: Used in structural components requiring high strength and toughness, such as heavy machinery, crane arms, and supports.
- Machinery: Employed in the manufacturing of gears, shafts, spindles, and other precision components.
Possible Alternative Grades
While the ASTM A519 4140 Seamless Precision Steel Tube is renowned for its excellent properties, there might be alternative grades suitable for specific applications. Some of the possible alternative grades include:
- ASTM A513 4140
- AISI 4130
- ASTM A519 4130
- SAE 4140
These alternative grades offer similar characteristics to the A519 4140, and their application suitability depends on specific requirements and industry standards.





Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.




Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Profile
Who We are ?
TORICH is an enterprise that has been producing precision steel
pipes and steel pipe processing for over 20 years, with a factory
area of approximately 20000 square meters
The main products produced are carbon steel and alloy steel grade
seamless steel pipes, welded precision steel pipes, DOM steel
pipes, seamless and welded stainless steel pipes。And our separate workshop also produce machined cast iron parts and cast steel
parts, as well ad customized precision parts and difficult
precision parts. Our strength is with in our ability to produce
metal parts of higher quality control in an integrated process, from mapping and mould design, to casting, forging, machining, heat treatment, surface treatment, assembly
and testing.
TORICH team is familiar with the quality requirements and process standards of
precision partssteel tubes of leading industrial companies at home and abroad,and management level, and constantly looks for like-minded excellent
suppliers, which enable us to reduce the have a comparative advantage over many of our competitors.
In the field of processing, TORICH has 18 sets 4-axis/3-axis CNC machines and over 30 sets of
CNC lathers. The machining center is capable of machining
1100x600x800mm parts and the CNC lathes are capable of processing
550x1500mm parts. We specialize in machining stainless steel, alloy
steel and other hard metals, as well as carbon steel, aluminium,
and copper, with a dimensional accuracy of 0.01mm.
As of 2023, TORICH has perfectly cooperated with more than 50
countries, including Russia, India, Australia, the United Kingdom, France, the United States,
Canada, Brazil, and Egypt. Quality and reputation are always our
first concerns, with the aim of well serving every customer who
trusts in us. TORICH looks forward to partnering with customers all
over the world.
What products we do?
------- Invent and produce various Precision Steel Pipes
Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes
CNC Stainless Steel Parts
CNC Aluminum Parts
CNC CopperParts
CNC Turning Parts
CNC Milling Parts
Products Application:
Oil Cylinders
Air Cylinder,
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries