ASTM A513 Steel Rectangular Tube & Square Tube

ASTM A513 is a specification published by the American Society for Testing and Materials (ASTM) that covers electric-resistance-welded carbon-steel and high-strength low-alloy steel Tubes in rectangular and square shapes. These tubes are commonly used in construction, mechanical equipment, and other applications where a rectangular or square cross-section is required.

The specification includes the following types of tubes:

- Type A: Seamless tubes with a normal wall thickness.

- Type B: Welded tubes with a normal wall thickness.

- Type C: Welded tubes with a cold-formed wall (smaller diameter than the inside diameter).

- Type D: Welded tubes with a hot-formed wall (larger diameter than the inside diameter).

ASTM A513 steel tubes can be made from various grades of carbon steel and high-strength low-alloy steel, which are selected based on the application requirements. The grades typically cover a range of tensile strengths, with the most common grades being Grade A (carbon steel) and Grade B (high-strength low-alloy steel).

Key characteristics of ASTM A513 steel rectangular and square tubes include:

- Cross-sectional shapes: Rectangular and square tubes are available in various dimensions, including width, height, and wall thickness.

- Inside dimensions: The inside diameter and wall thickness are specified, which determine the inner volume and the ease of passage for fluids or other materials.

- Length: Tubes can be available in random lengths or cut to a specific length depending on the customer's requirements.

- Surface finish: The tubes can be smooth or have a galvanized finish for improved corrosion resistance.

To ensure that ASTM A513 steel rectangular and square tubes meet the desired quality and performance standards, they are subject to various manufacturing processes, including welding, heat treatment, and testing. The tubes are also inspected and tested according to ASTM standards to verify their mechanical properties, such as tensile strength, yield strength, and wall thickness.