Electrical resistance is often thought of as how easily electricity can flow through a specific material. Georg Ohm, a German physicist, is best known for Ohm’s Law. This scientific law says that “the current flow through a conductor is directly proportional to the potential difference (voltage) and inversely proportional to the resistance.” Electrical conductivity in metals follows Ohm’s law. Electrical resistance is the measure of oppositional flow to an electric current. Electricity’s relationship to metal changes based on the specific metal. For example, silver and copper, both metals with only one valence electron, are more conductive to electricity. ASTM A513-20: Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing provides guidelines specifically on electric-resistance-welded carbon and alloy steel tubing for use as mechanical tubing.
The mechanical tubing discussed in ASTM A513-20 has been welded. Welding is the process of joining metallic parts usually through the use of heat. Welding has been around for a long time. Early instances of welding can be traced to regions like India and Ireland. Some of these examples go back as far as the Bronze Age.
ASTM A513-20 has a wide scope. The standard covers electric-resistance-welded carbon and alloy steel tubing for use as mechanical tubing. Mechanical tubing made from hot-rolled or cold-rolled steel is covered under ASTM A513-20. It also covers square, round, rectangular, and special shape tubing.
ASTM A513/A513M-20: Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing is available on the ANSI Webstore.