Inox Steel India supplies 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.
These grades are heat-treated through annealing, normalizing, and quenching & tempering (Q&T) depending on application requirements, ensuring optimum mechanical performance for high-stress or precision-machined components.
Inox Steel India exports ASTM A519 mechanical tubing to the Middle East, Europe, South-East Asia, Africa and North America—ensuring reliable performance, consistent tolerances and full certification.
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.
Best Grades: 1026 · 4130 · 4140
Recommended: 4130 · 4140 · 4340
Best Grades: 4140 · 4340 (Q&T)
| 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 machining + 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 |
| Grade | Approx. Price (₹/kg) |
| 1020 / 1026 | ₹80 – ₹120 |
| 4130 / 4140 | ₹130 – ₹220 |
| 4340 | ₹200 – ₹300 |
| Quenched & Tempered | +20–35% premium |
Q1. What is the difference between CDS and HFS tubing?
CDS provides superior accuracy and finish. HFS is ideal for large OD & heavy-wall requirements.
Q2. Which grades are used for hydraulic cylinders?
1026, 4130 and 4140 depending on strength needs.
Q3. Do you supply Q&T tubes?
Yes, for high-strength applications.
Q4. Can ASTM A519 tubes be machined easily?
Yes, especially 1020/1026. Alloy grades offer high strength with good machinability.