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Inox Steel India supplies premium ASTM A519 Seamless Mechanical Tubing manufactured from carbon steel and alloy steel grades, designed for heavy mechanical loads, machining, hydraulic equipment, automotive components and mining machinery. These tubes are produced through cold drawing or hot finishing, delivering excellent dimensional precision, machinability and mechanical strength.
ASTM A519 tubing is widely used where high tensile strength, uniform wall thickness, impact resistance and consistent metallurgical properties are critical. The cold-drawn variants offer tighter tolerances and superior surface finish, while hot-finished tubes are ideal for large-diameter or heavy-wall applications.
✔ Grades Supplied
These grades are heat-treated through annealing, normalizing, quenching & tempering (Q&T) depending on application requirements, ensuring optimum mechanical performance for high-stress or precision-machined components.
Our ASTM A519 tubing is supplied to:
Inox Steel India exports mechanical tubing to the Middle East, Europe, South-East Asia, Africa and North America—ensuring reliable performance, consistent tolerances and full certification.
| Parameter | ASTM A519 Mechanical Tubing (Carbon & Alloy Steel) |
|---|---|
| Standard | ASTM A519 — Seamless Carbon & Alloy Steel Mechanical Tubing |
| Grades (Carbon Steel) | 1020, 1025, 1026 |
| Grades (Alloy Steel) | 4130, 4140, 4145, 4340 |
| Manufacturing Process | Seamless • Cold Drawn (CDS) • Hot Finished (HFS) |
| Size Range (OD) | 6 mm to 406 mm OD |
| Thickness (WT) | 1 mm to 50 mm WT |
| Length Options | Random • Fixed • Custom • Drawn-to-length |
| Surface Finish | Cold Drawn • Hot Rolled • Annealed • Normalized • Q&T |
| Heat Treatment Options | Annealed, Normalized, Stress Relieved, Quenched & Tempered |
| Tolerances | Precision OD/WT tolerances for machining & mechanical applications |
| Mechanical Strength | Depends on grade • Very high yield/tensile strength (especially 4130/4140/4340) |
| Corrosion Resistance | Moderate (CS) • Enhanced with alloy elements in 4130/4140/4340 |
| End Finish | Plain Ends • Beveled Ends • Custom Machined Ends |
| Mandatory Testing | Hydrostatic • NDT • Hardness • Tensile • Flattening |
| Special Testing | Charpy Impact • UT • MPI • Microstructure • Hardness Mapping |
| Documentation | MTC EN 10204 3.1 • Chemical & Mechanical Test Reports |
| Key Advantages | High machinability • Excellent strength • Ideal for mechanical components |
| Typical Applications | Hydraulic cylinders • Automotive shafts • Mechanical parts • Machining components • Mining equipment |
ASTM A519 tubing is engineered for mechanical strength, machinability, dimensional accuracy and load-bearing performance, making it ideal for high-stress engineering components. With options in cold-drawn and hot-finished mechanical tubing, this standard is widely used in automotive, hydraulic, machining, mining, and fabrication industries.
🔹 1. Hydraulic Cylinders & Actuators
Cold-drawn, precision-honed tubes ensure smooth piston movement and long life.
Applications:
Best Grades: 1026 • 4130 • 4140
🔹 2. Automotive & Transportation Components
High-strength alloy grades ensure durability under impact and vibration.
Used For:
Recommended: 4130 • 4140 • 4340
🔹 3. Heavy Machinery & Mining Equipment
Ideal for high-load, shock-resistant mechanical assemblies.
Applications:
Best Grades: 4140 • 4340 (Q&T)
🔹 4. Machined & Precision-Engineered Components
Superior machinability makes A519 tubing ideal for complex machining.
Used For:
Grades: 1020 • 1026 • 4130
🔹 5. Power & Energy Equipment
High fatigue strength + stability under cycling loads.
Applications:
Grades: 4140 • 4145
🔹 6. Structural & Mechanical Fabrication
A519 tubes provide strength-to-weight advantage.
Used For:
| Application | Recommended Grade | Why |
|---|---|---|
| Hydraulic cylinders | 1026 / 4130 | Smooth ID + precise tolerances |
| Automotive shafts | 4140 / 4340 | High strength + fatigue resistance |
| Machining components | 1020 / 1026 | Easy to machine + uniformity |
| Heavy machinery | 4130 / 4140 | Wear & shock resistance |
| Oilfield & energy | 4140 / 4145 | Heat treatable + strong |
| Type | OD Range | WT Range | Use |
|---|---|---|---|
| Cold Drawn Tubing (CDS) | 6 – 200 mm | 1 – 12 mm | High precision machining |
| Hot Finished Tubing (HFS) | 50 – 406 mm | 3 – 50 mm | Heavy loads • Large OD |
| Honed / Ready-to-Hone Tubes | 40 – 350 mm | 3 – 30 mm | Hydraulic cylinders |
Indicative Pricing (India Market)
(Price varies by grade, OD, WT, and heat treatment)
| Grade | Approx. Price (₹/kg) | Notes |
|---|---|---|
| 1020 / 1026 | ₹80 – ₹120 | Most used grades |
| 4130 / 4140 | ₹130 – ₹220 | Alloy steel mechanical tubing |
| 4340 | ₹200 – ₹300 | Premium high-strength alloy |
| Quenched & Tempered | +20–35% premium | Additional heat treatment |
Mandatory Tests (ASTM A519):
Special Tests (As Required):
Documentation Provided:
Inox Steel India is a trusted supplier of ASTM A519 seamless mechanical tubing for high-load, high-precision and machining-critical applications. Our tubes are manufactured using cold-drawn and hot-finished seamless processes, ensuring excellent dimensional stability, concentricity, and predictable mechanical performance.
✔ Why Our ASTM A519 Tubes Are Preferred
We deliver mechanical tubing for applications where strength, durability and machining response are critical.
| Industry | Uses |
|---|---|
| Hydraulics | Cylinder barrels, actuators |
| Automotive | Shafts, axles, drive components |
| Machining Centers | Bushings, rollers, machined parts |
| Heavy Machinery | Mining equipment, drilling units |
| Oilfield & Energy | Mechanical assemblies, rigs |
| General Engineering | Fabrication, frames, equipment parts |
Our ASTM A519 tubing supports precision machining, load-bearing structures and hydraulic performance.
We supply ASTM A519 tubing to 40+ countries, packaged to avoid damage, rust and handling stress during transit.
Packaging Options:
Major Export Locations:
UAE • Saudi Arabia • Qatar • Oman • Kuwait
Europe • USA • Canada • Mexico
South Africa • Kenya • Nigeria
Malaysia • Singapore • Vietnam
We assist with:
✔ Grade selection (1026 vs 4130 vs 4140)
✔ Heat treatment selection (Normalized / Annealed / Q&T)
✔ Machining-related material recommendations
✔ Hydraulic cylinder tube selection
✔ Bulk/OEM supply schedules
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
1026, 4130 and 4140 are commonly used depending on strength needs. Yes — Quenched & Tempered tubes are available for high-strength applications. Yes, especially 1020/1026. Alloy grades such as 4140/4340 offer high strength + good machinability. UT/EC, hardness, tensile, chemical, mechanical and heat-treatment reports. Which grades are used for hydraulic cylinders?
Do you supply tubes in Q&T condition?
Can ASTM A519 tubes be machined easily?
What type of testing is provided?
Inox Steel India supplies ASTM A519 seamless mechanical tubing in carbon and alloy steel grades 1020, 1026, 4130, 4140 and 4340. Ideal for hydraulic cylinders, automotive components, machining and heavy-equipment applications. Hot-finished & cold-drawn tubes with MTC 3.1.