ST 52 seamless pipes are low alloy, high-strength structural steel pipes known for their excellent toughness, weldability, and load-bearing capacity. Manufactured without any welding seams, these pipes offer superior integrity and uniform strength, making them ideal for high-pressure and heavy-duty applications.

Key Features

Material Grade: ST 52 (DIN 2391 / DIN 1629 standards)
Type: Seamless (cold drawn or hot finished)
Tensile Strength: 490–630 MPa
Yield Strength: ≥ 355 MPa
Sizes Available: Outer diameter from 10 mm to 273 mm
Thickness Range: 2 mm to 30 mm
Length: Up to 12 meters (custom cut on request)
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Advantages

Excellent mechanical strength and durability
Smooth inner surface for better flow
Corrosion-resistant with appropriate surface treatments
Suitable for machining, bending, and welding
Reliable under high pressure and temperature

Applications

Hydraulic systems and cylinder manufacturing
Automotive and mechanical engineering
Construction and infrastructure
Oil & gas pipelines
Pressure vessels and boilers

Finish & Delivery

Black, phosphated, or oiled surface
Ends: Plain or beveled; threaded on request
Delivered with mill test certificates and compliance to DIN/EN standards