Standard
ASTM A519, DIN 2391
Size Range
OD 0.6–121 mm · WT 0.08–18 mm
Category
Seamless Steel Pipe
Seamless precision tubes manufactured through cold-drawing or cold-rolling for excellent dimensional accuracy, uniform wall thickness, and smooth surface finish. Supplied to DIN 2391, EN 10305, EN 10305-4, and GB/T 3639 in delivery conditions +C (cold drawn/hard), +LC (cold drawn/soft), +SR (stress relieved), +A (annealed), and +N (normalised). Supply range OD 0.6–121 mm, WT 0.08–18 mm.
Applications
- → Hydraulic and pneumatic cylinders — tight tolerances for seal performance
- → Mechanical engineering — precision machine tool components
- → Automotive engineering — suspension, steering, and driveline tubing
- → Instrumentation — measurement and control tube assemblies
- → Aerospace — precision structural tubing where dimensional accuracy is critical
Standards & Certifications
- ASTM A519
- DIN 2391
- EN 10305
- EN 10305-4
- GB/T 3639
Inspection & Testing
- → Dimensional inspection — 100% per lot — OD (±0.15 mm precision class), WT, roundness per GB/T 3639 / EN 10305-1
- → Surface roughness — Ra ≤ 0.4 µm inner/outer surface by contact profilometer on cold-drawn finish
- → Tensile test — Rm, ReH, A% per applicable standard; one per lot by delivery condition
- → Hydrostatic test — Available on request
- → MTC — EN 10204 3.1 mill test certificate standard; 3.2 third-party on request
Supply Enquiry — Precision Tube
Tell us your standard, grade, OD, wall thickness, delivery condition, quantity, and delivery port. We will respond within one business day with availability and lead time.
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