USA Piping Solution is a trusted ASTM A519 tubing supplier offering seamless carbon steel tubing and alloy steel mechanical tubing in grades 1020, 1026, 4130, and 4140. We manufacture cold drawn ASTM A519 tubing with tight dimensional tolerances. ASTM A519 tubing is produced for structural and mechanical applications requiring high strength, dimensional accuracy, and excellent machinability. We supply hot-finished and cold-drawn ASTM A519 seamless mechanical tubing with full mill certification and worldwide delivery support.
Our hot finished ASTM A519 seamless tubes are widely used in heavy-duty applications.
What is ASTM A519?
ASTM A519 is a specification covering seamless carbon and alloy steel mechanical tubing used for structural and mechanical components.
Unlike pressure pipe standards such as ASTM A106, ASTM A519 tubing is designed for:
- Mechanical strength
- Structural integrity
- Precision machining
- Automotive components
- Load-bearing applications
If your application requires dimensional control and mechanical performance rather than fluid pressure containment, ASTM A519 tubing is the correct material choice.
ASTM A519 Tubing Specifications
| Property | Details |
|---|---|
| Standard | ASTM A519 |
| Type | Seamless Mechanical Tubing |
| Manufacturing | Hot-Finished & Cold-Drawn |
| Grades Available | 1020, 1026, 4130, 4140 |
| Form | Round Tubing |
| Condition | As-rolled, Annealed, Normalized, Quenched & Tempered |
ASTM A519 Carbon & Alloy Steel Grades
ASTM A519 Grade 1020<
Low carbon steel with excellent machinability and good weldability. Commonly used in shafts, pins, and general mechanical parts. SAE 1020 is characterized by low hardness and tensile strength with typical Brinell hardness between 119–235 and tensile strength ranging from 410 MPa to 790 MPa. Its high ductility and weldability make it suitable for cold-drawn tubing used in automated sectors and mechanical applications.
ASTM A519 Grade 1026<
Higher manganese content provides improved tensile strength compared to 1020. Frequently used in automotive components, structural tubing, and mechanical frameworks where moderate strength is required.
ASTM A519 Grade 4130<
Chromium-molybdenum alloy steel with a high strength-to-weight ratio. Commonly used in aerospace structures, oil and gas components, and high-stress mechanical applications. We supply AISI 4130 in accordance with ASTM A519 mechanical tubing standards.
ASTM A519 Grade 4140<
Higher carbon alloy steel offers excellent wear resistance, toughness, and fatigue strength. Widely selected for heavy-duty shafts, gears, oilfield tools, and high-stress automotive components. Materials meeting ASTM A519 Grade 4140 requirements are engineered for demanding environments.
ASTM A519 Tubing Chemical Composition
| Grade | C | Mn | Cr | Mo |
|---|---|---|---|---|
| 1020 | 0.18–0.23 | 0.30–0.60 | — | — |
| 1026 | 0.22–0.28 | 0.60–0.90 | — | — |
| 4130 | 0.28–0.33 | 0.40–0.60 | 0.80–1.10 | 0.15–0.25 |
| 4140 | 0.38–0.43 | 0.75–1.00 | 0.80–1.10 | 0.15–0.25 |
Mechanical Properties of ASTM A519 Tubing
| Grade | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| 1020 | ~420 MPa | ~350 MPa | ~25% |
| 1026 | ~485 MPa | ~415 MPa | ~20% |
| 4130 | ~670 MPa | ~435 MPa | ~20% |
| 4140 | ~850 MPa | ~655 MPa | ~18% |
Mechanical properties vary depending on heat treatment and cold finishing.
Manufacturing Process of ASTM A519 Tubing
Hot-Finished Seamless Tubing
- Produced directly from billet
- Suitable for structural applications
- Economical option
Cold-Drawn Seamless Tubing
- Enhanced surface finish
- Tighter dimensional tolerance
- Improved strength
Cold-drawn ASTM A519 tubing is preferred for CNC machining and automotive components.
Quality & Testing of A519 Seamless Mechanical Steel Tubing
All ASTM A519 seamless mechanical tubing is supplied with:
- Mill Test Certificates
- Chemical analysis
- Mechanical testing
- Dimensional inspection
- Third-party inspection (on request)
Explore the complete ASTM A519 Seamless Mechanical Steel Tubing specifications, including carbon and alloy steel chemical limits and size tolerances.
Applications of ASTM A519 Seamless Mechanical Tubing
ASTM A519 tubing is selected for structural and precision mechanical applications.
- Automotive drive shafts
- Hydraulic cylinders
- Structural frameworks
- Agricultural equipment
- Construction machinery
- Oil & gas components
- Aerospace frames
For stainless steel mechanical applications, explore our ASTM A511 Mechanical Tubing available in MT304 and MT316 grades.
Request ASTM A519 Tubing Specifications & Quote
For full ASTM A519 tubing specifications, dimensional tolerance charts, grade availability, or pricing, contact USA Piping Solution. We supply ASTM A519 seamless mechanical tubing in both hot-finished and cold-drawn conditions with mill certification and fast delivery support.
Frequently Asked Questions About ASTM A519 Tubing
What is ASTM A519 material?
ASTM A519 is a standard for seamless carbon and alloy steel mechanical tubing. It is made by hot working and cold finishing into round or special shapes for strength and precision use.
What is ASTM A519 equivalent to?
It is commonly compared with mechanical-grade seamless tubing used for structural and automotive parts.
What is the difference between ASTM A500 and A519?
ASTM A500 is structural tubing that can be welded or seamless, while ASTM A519 is seamless mechanical tubing used for precision and strength applications.