ASTM Standards for Seamless Square Tubes

1. ASTM A588 - This standard covers high-strength low-alloy structural shapes, plates, and bars, including seamless square tubes, for use in applications requiring structural steel with improved atmospheric corrosion resistance.

2. ASTM A36 - This standard covers carbon structural shapes, plates, and bars, including seamless square tubes, for use in general construction applications where strength and economy are important.

3. ASTM A572 - This standard covers high-strength low-alloy columbium-vanadium structural shapes, plates, and bars, including seamless square tubes, for use in applications requiring atmospheric corrosion resistance.

4. ASTM A992 - This standard covers hot-rolled weldable steel grades for use in structural applications, including seamless square tubes, which have improved formability and is commonly used for the construction of intermediate and wide-flange I-beams.

5. ASTM A516 - This standard covers carbon steel plates and bars intended for use in moderate- and lower-temperature service in boilers and other pressure vessels. While typically used for plates, seamless square tubes made from materials equivalent to A516 can be specified for certain applications.

6. ASTM A369 - This standard covers seamless tubes and pipe for high-temperature service in power generation applications, including square tubes that can be used in boiler systems requiring elevated temperature capabilities.