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Seamless Carbon Steel & Alloy Steel Mechanical Tubes for High-Precision Engineering Applications
Inox Steel India is a leading manufacturer and exporter of ASTM A519 (USA standard) and EN 10297-1 (European standard) seamless mechanical tubes used for machining, general engineering, automotive components, hydraulic parts, load-bearing assemblies, and fabrication requiring high strength + dimensional precision.
Mechanical tubes handle:
Our seamless carbon steel and alloy steel mechanical tubes are cold-drawn or hot-finished to ensure excellent straightness, internal smoothness, and uniform mechanical properties.
Mechanical tubes need: High strength, Precise tolerances, Good machinability, Excellent formability, and Uniform internal structure. ASTM A519 covers seamless carbon & alloy steel tubes extensively used in the American engineering industry. EN 10297-1 covers seamless circular tubes for mechanical/engineering applications in Europe, ensuring: Tight tolerance, Controlled chemical composition, and Superior dimensional accuracy. These standards are globally accepted for OEM components, automotive parts, machinery parts, hydraulic cylinders, and general mechanical engineering.
ASTM A519 Grades:
EN 10297-1 Grades:
These materials are compatible with: CNC machining, Heat treatment (QT, N, SR), Induction hardening, and Welding (for suitable carbon ranges).
These tubes are chosen where strength + machinability + dimensional accuracy are essential.
ASTM A519 & EN 10297-1 seamless mechanical tubes are used in high-strength, precision-machined, structural, and load-bearing engineering applications. These tubes are chosen where torsion strength, machinability, fatigue resistance, and dimensional accuracy are mandatory.
🔹 ASTM A519 – Carbon Steel Mechanical Tubes (1020, 1026)
| Application | Requirement | Industries |
|---|---|---|
| CNC machined components | Good machinability | Engineering · Automation |
| Rollers & shafts | High surface finish | Printing · Textile |
| Axle tubes | Strength + bending | Automotive |
| Bushings & sleeves | Machining stability | Machine tools |
| Light hydraulic parts | Medium pressure | OEMs |
Why A519 1020/1026? Ideal balance of machinability + strength for engineering components.
🔹 ASTM A519 – Alloy Steel Mechanical Tubes (4130 / 4140 / 4340)
| Application | Requirement | Industries |
|---|---|---|
| Drive shafts | High torsion | Automotive · Off-road |
| Steering columns | Strength + lightweight | Mobility |
| Propeller shafts | Dynamic loading | Marine |
| Gear sleeves | Toughness | Transmission |
| Structural machine parts | High fatigue | Heavy Engineering |
Why 4130/4140? Chrome-moly steels → excellent strength × weight performance.
🔹 EN 10297-1 – E235 / E275 / E355
| Application | Requirement | Industry |
|---|---|---|
| General engineering tubes | Dimensional accuracy | Engineering Workshops |
| Machining parts | Uniform material | CNC Fabrication |
| Pneumatic equipment | Light pressure | Automation |
| Automotive linkages | Moderate strength | Auto Components |
Why E235/E275/E355? Weldable, formable, and compatible with European OEM requirements.
🔹 EN 10297-1 – 25CrMo4 / 34CrMo4 / 42CrMo4
| Application | Requirement | Industries |
|---|---|---|
| Machine tool spindles | High strength | Precision Machinery |
| Hydraulic cylinder barrels | High pressure | Industrial Hydraulics |
| Gear shafts | Toughness | Power Transmission |
| Crankshaft & camshaft tubes | Impact resistance | Engines |
| Heavy mechanical assemblies | Load-bearing | Mining & Steel Mills |
Why CrMo Grades? High tensile strength + fatigue & impact loading capacity.
| Grade | Condition | Price (INR/kg) | Price (USD/kg) | Typical Use |
| A519 1020/1026 | CDS | ₹95 – ₹155 | $1.25 – $2.00 | General machining |
| A519 4130/4140 | Q+T | ₹145 – ₹240 | $1.90 – $3.20 | High strength parts |
| EN 10297 E355 | CDS | ₹110 – ₹170 | $1.40 – $2.25 | European OEM components |
| 42CrMo4 / 34CrMo4 | Q+T | ₹160 – ₹280 | $2.10 – $3.60 | Heavy-duty mechanical parts |
📌 Prices vary based on OD, WT, material grade, heat treatment, and tolerance class.
Mechanical Tests
Non-Destructive Tests
Metallurgical & Dim.
Certifications
Inox Steel India is one of the most trusted suppliers of ASTM A519 / EN 10297-1 Mechanical Tubes near Alankar Cinema, Mumbai, delivering seamless carbon steel and alloy steel mechanical tubes for CNC machining, automotive components, hydraulic cylinder assemblies, and heavy-duty engineering applications.
Our mechanical tubes are engineered for: High torsion & bending loads, Dynamic & cyclic stress conditions, Precision machining (CNC, boring, threading), Fabrication requiring excellent weldability, Drive shafts, rollers, axles, and spindles, and Load-bearing industrial structures. ASTM A519 and EN 10297-1 tubes are preferred globally due to their strength, dimensional accuracy, heat-treatability, and reliability in mechanical applications.
| Industry | Typical Applications |
| Automotive & Commercial | Axle tubes · Drive shafts · Steering columns |
| Mechanical Engineering | Machined components · Rollers · Spindles |
| Hydraulic Equipment | Cylinder barrels · Piston tubes |
| Industrial Machinery | Shafts · Pins · Bushings |
| Agricultural Machinery | Linkages · Load-bearing tubes |
| Mining & Construction | Heavy-duty mechanical parts |
| Power Transmission | Gear sleeves · Coupling tubes |
Our packaging ensures protection against corrosion, bending, and surface damage.
Packaging Includes
Shipping Information
Looking for high-strength mechanical tubes for machining, automotive, hydraulic, or engineered components? Contact our technical team today.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
A519 is the American standard; EN 10297-1 is the European standard — both specify seamless mechanical tubes for engineering applications.
4130, 4140, 34CrMo4, and 42CrMo4 are preferred for their excellent strength, toughness, and fatigue resistance.
Yes — Q+T, normalizing, annealing, and stress relieving are common.
Absolutely — they offer excellent straightness, concentricity, and machinability.
Yes — to GCC, Europe, Africa, USA, and South America.
Inox Steel India supplies mechanical tubes as per ASTM A519 & EN 10297-1 standards. Seamless carbon & alloy steel tubes for machining, hydraulic cylinders, automotive parts, and heavy engineering. Exporter to GCC, Europe, Africa & USA.