ASTM A500 Grade B High-Frequency/HFW Welding Pipe

ASTM A500 Class B High-Frequency Welded Pipe Product Introduction

ASTM A500 Class B HFW welded pipe is manufactured using high-frequency resistance welding technology and is specifically designed for building structural applications. It possesses a yield strength of not less than 290 MPa and a tensile strength of not less than 400 MPa. Through precision cold bending and online weld treatment, this product ensures excellent cross-sectional properties and dimensional accuracy, making it suitable for load-bearing structures in commercial buildings, industrial facilities, and other applications, combining structural safety with economic efficiency.

ASTM A500 Grade B Pipe Specification

The chemical composition of ASTM A500 Grade B steel includes appropriate amounts of carbon and manganese to ensure good mechanical and weldability. Meanwhile, the phosphorus and sulfur content is strictly controlled to prevent embrittlement, and the addition of appropriate amounts of copper improves its corrosion resistance.

These properties make it ideal for structural applications, especially in environments requiring good weldability and durability.

ASTM A500 Class B High-Frequency Welded Round Tube Flattening Test

Weld Ductility Test: Using a specimen at least 4 inches (100 mm) in length, flatten the specimen so that the weld is at a 90° angle to the direction of loading, until the distance between the flattening plates is less than 2/3 of the tube's outer diameter. During this process, no cracks or breaks should appear on the inner or outer surfaces of the specimen.

Tube Ductility Test: Continue flattening the specimen until the distance between the flattening plates is less than 1/2 of the tube's outer diameter. At this point, no cracks or breaks should appear on the inner or outer surfaces of the tube.

Integrity Test: Continue flattening the specimen until breakage occurs or the relative wall thickness requirement is met. If interlayer spalling, material instability, or weld incompleteness is observed during the flattening test, the specimen will be deemed unqualified.

About us

Our company has focused on steel exports for twenty years, relying on a global supply chain system to provide the international market with high-end welded pipes certified by EN and ASTM. With a professional team and mature logistics, we provide one-stop services for energy and infrastructure projects, from procurement to cross-border delivery.

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