ASTM A519 Seamless Tubes Manufacturer & Supplier in India
When industries need strong, precise, and reliable mechanical tubing, ASTM A519 seamless tubes are one of the most trusted choices. These tubes are widely used in automotive parts, machinery, heat exchangers, hydraulic systems, and structural applications where accuracy, strength, and performance really matter.
We supply ASTM A519 seamless mechanical tubing to customers across India and overseas, covering a wide range of sizes, grades, and finishes such as A519 CD seamless tube, DOM tubing, and alloy grades like A519 Gr 4130. Our focus is simple: deliver tubing that works in real-world conditions, not just on paper.
If you are searching for a dependable ASTM A519 seamless mechanical tubing manufacturer & supplier in India or looking for ASME SA519 heat exchanger tube, you are in the right place.
What is ASTM A519 Seamless Tubing?
ASTM A519 is a standard specification for seamless carbon and alloy steel mechanical tubing. Unlike welded tubes, A519 seamless tubing is made without a welded seam, which gives it:
- Higher strength and uniform structure
- Better pressure resistance
- Improved reliability in critical applications
- More accurate dimensions after finishing the processes
In simple words, an A519 steel tube is designed for mechanical and engineering uses where performance, strength, and precision are more important than just basic fluid transport.
This standard covers several grades of carbon and alloy steel, including popular options like 1020, 1026, depending on the strength and performance required.
Key Advantages of ASTM A519 Seamless Tubes
- Seamless construction for better strength and pressure resistance
- Excellent machinability for precision parts
- Consistent mechanical properties
- Available in HF, CD, and DOM conditions
- Wide size and grade range
- Suitable for both ASTM A519 and ASME SA519 heat exchanger tube applications
In real projects, this means longer service life, better safety, and fewer failures.
Types of ASTM A519 Seamless Tubing We Supply
We offer ASTM A519 seamless tubes in different manufacturing conditions to match different applications.
A519 CD Seamless Tube (Cold Drawn)
Cold-drawn tubes are processed at room temperature to achieve:
- Tighter dimensional tolerances
- Better surface finish
- Higher strength compared to hot-finished tubes
A519 CD seamless tube is widely used in automotive parts, precision components, and hydraulic systems where accuracy really matters.
DOM Tubing (Drawn Over Mandrel)
DOM tubing is further processed to improve:
- Roundness and straightness
- Surface quality
- Mechanical consistency
When customers ask about A519 DOM tubing price, we explain that DOM costs more than basic tubing because of the extra processing—but it delivers much better performance and reliability in precision and high-stress parts.
A519 HF Seamless Tube (Hot Finished)
Hot Finished (HF) tubes are ideal when:
- Very tight tolerances are not required
- Strength and toughness are more important than surface finish
- Cost efficiency matters
These are commonly used in structural and heavy engineering applications.
ASTM A519 vs ASME SA519
You will often see both ASTM A519 and ASME SA519 mentioned together. ASME SA519 is the same material specification adopted by ASME for boiler and pressure-related applications.
So, if your project needs an ASME SA519 heat exchanger tube or mechanical tubing for pressure equipment, the base material requirements remain the same—only the code reference changes.
ASTM A519 Seamless Tubes – Specifications
Below is a general specification range we supply for ASTM A519 seamless tubes. Custom sizes and lengths can also be arranged based on project needs.
ASTM A519 Seamless Mechanical Tubing – Specification Chart
| Specification | Details |
| Standard | ASTM A519 / ASME SA519 |
| Type | Seamless Mechanical Tubing |
| Manufacturing Process | Hot Finished (HF), Cold Drawn (CD), DOM |
| Outside Diameter (OD) | 6 mm to 508 mm |
| Wall Thickness | 1 mm to 50 mm |
| Length | Random, Fixed, or Cut Length |
| Surface Finish | Black, Bright, Polished, Pickled |
| End Finish | Plain End, Beveled End, Square Cut |
| Grades | 1020, 1026, A519 Gr 4130, and other carbon/alloy grades |
| Condition | HF, CD, DOM |
| Application | Mechanical, Automotive, Hydraulic, Heat Exchanger, Engineering |
This wide range makes A519 seamless tubing suitable for both light-duty precision parts and heavy-duty structural or mechanical components.
Chemical Composition of ASTM A519 Tubes
The chemical composition depends on the specific grade. Below is a typical composition range for commonly used carbon steel grades under ASTM A519 (values are approximate and may vary by grade and heat).
| Element | 1020 / 1026 (Carbon Steel) | A519 Gr 4130 (Alloy Steel) |
| Carbon (C) | 0.18 – 0.28 | 0.28 – 0.33 |
| Manganese (Mn) | 0.60 – 0.90 | 0.40 – 0.60 |
| Phosphorus (P) | Max 0.035 | Max 0.035 |
| Sulfur (S) | Max 0.040 | Max 0.040 |
| Chromium (Cr) | — | 0.80 – 1.10 |
| Molybdenum (Mo) | — | 0.15 – 0.25 |
| Silicon (Si) | Max 0.40 | 0.15 – 0.35 |
This is why A519 Gr 4130 offers much higher strength and toughness compared to regular carbon steel grades.
Mechanical Properties of ASTM A519 Seamless Tubing
The mechanical properties vary depending on grade and heat treatment condition (HF, CD, DOM). Below are typical minimum values used in industry.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 1020 / 1026 | 410 – 550 | 245 – 350 | 15 – 25 |
| DOM Tubing (Typical) | 480 – 620 | 350 – 450 | 10 – 20 |
| A519 Gr 4130 | 560 – 700+ | 460 – 560+ | 10 – 18 |
These properties explain why A519 seamless tubes are preferred for parts that must handle load, stress, vibration, and pressure without failure.
Applications of A519 Seamless Tubing
- Automotive & Transport: Drive shafts, axles, suspension parts, roll cages
- Machinery & Engineering: Shafts, spindles, bushings, structural frames
- Hydraulic & Pneumatic Systems: Hydraulic cylinders, pressure tubing, mechanical parts
- Heat Exchangers & Pressure Equipment: ASME SA519 heat exchanger tube applications and Boiler and high-temperature mechanical components
- Oil, Gas & Heavy Industry: Tools, equipment parts, load-bearing mechanical tubing
Why Choose Us as Your ASTM A519 Tubing Supplier?
- Wide stock range of ASTM A519 seamless tubes
- Experience with real industrial applications
- Support for both ASTM A519 and ASME SA519 requirements
- Reliable sourcing and consistent quality
- Honest guidance on grades, sizes, and finishes
- Competitive pricing, including DOM and CD tubing
Choosing the right ASTM A519 seamless tubes is not just about meeting a standard—it’s about making sure your machines and components perform safely, reliably, and efficiently.
With options like A519 CD seamless tube, DOM tubing, A519 HF seamless tube, and alloy grades such as A519 Gr 4130, this specification covers a wide range of mechanical needs. And with support for ASTM A519 as well as ASME SA519 heat exchanger tube requirements, it fits both general engineering and demanding industrial applications.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A519 Seamless Tubes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
