A335 Seamless Construction – The seamless construction ensures a uniform structure without any weld seam, providing reliable performance under high pressure.
High-Temperature Strength – Excellent creep rupture strength is maintained up to 600°C (1112°F), making it ideal for elevated temperature applications.
Oxidation & Corrosion Resistance – The chromium content offers superior resistance to high-temperature oxidation and sulfur corrosion, extending service life in harsh environments.

ith seamless construction ensuring a uniform structure and reliable performance under dynamic loads, precision dimensional tolerances available through cold‑finished options that are ideal for machining and hydraulic applications, a wide grade selection spanning carbon steel (10xx series) and alloy steel (41xx series) to meet diverse strength and hardness requirements, multiple delivery conditions including hot‑rolled, cold‑drawn, annealed, normalized, or stress‑relieved states, excellent machinability specifically formulated for turning, drilling, and threading operations, and global acceptance widely specified in international engineering projects and mechanical component manufacturing, our ASTM A519 mechanical tubing delivers unparalleled reliability and versatility.

ASTM A106, API5L, ASTM A53, ASME B36.10M-1996 / GB8163-1999
Material:GR.A, GR.B / 10# 20#
Pipe Ends: Beveled or plain ends
End protection: None or caps
Packing: Outer diameter 219mm and below: in hexagonal seaworthy bundles packed by steel strips;
Outer diameter 273mm and above: piece by piece.

Standard Specifications: Complies with ASTM A53/A53M (or ASME SA-53/SA-53M) standards, covering both seamless and welded steel pipes.
Type: In the field of seamless steel pipes, this corresponds to Type S, applicable to grades A and B.
Grade: Primarily available in grades A and B, with grade B being the mainstream product due to its higher strength and wider applications.