ASTM A513 and A519 mechanical tube are both American Society for Testing and Materials (ASMT) standard specifications for the manufacture of mechanical tube. Both cover carbon and alloy steel tubing, but there are some key differences.
ASTM A513 specification covers round, square, rectangular, and special shape electric-resistance-welded carbon and alloy steel mechanical tubing produced by hot- or cold-rolling. The types of tubing covered here are: Type 1a, as-welded from hot- rolled steel (with mill scale); Type 1b, as-welded from hot-rolled pickled and oiled steel (mill scale removed); Type 2, as-welded from cold-rolled steel; Type 3, sink-drawn hot-rolled steel ; Type 4, sink-drawn cold-rolled steel; Type 5, drawn over a mandrel; and Type 6, special smooth inside diameter.
A519 covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished. The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required.
ASTM A513 VS A519 Mechanical Tube
| Criteria | ASTM A513 Mechanical Tubing | ASTM A519 Mechanical Tubing |
|---|---|---|
| Material & Process | - Resistance-welded carbon and alloy steel tubing. - Can be cold or hot rolled. | - Seamless carbon and alloy steel mechanical tubing. - Available in both hot-finished and cold-finished conditions. |
| Shapes & Sizes | - Available in various shapes: round, square, rectangular, and special shapes. - Round tube: 0.500-2.00 inches. Square pipe: 0.500-1.500 inches. | - Primarily focuses on seamless tubing. - Available in round, square, and rectangular profiles. |
| Performance Standards | - Offers increased ductility with tightly controlled carbon steel grades. - ASTM A513 1010, ASTM A513 1020, ASTM A513 1026, ASTM A513 4130. | - Detailed mechanical property requirements. - Includes hardness, tensile, and non-destructive tests. |
| Applications | - Widely used in construction, bridges, marine navigation, and oil and gas industry. | - Used in applications requiring machining, heat treating, close tolerances, and specific physical properties. |
| Chemical Composition | - Made of 1008-1015 steel, primarily iron with trace amounts of carbon. | - Varies by grade, with specific requirements for carbon, manganese, phosphorus, silicon, and other elements. |
| Environmental Focus | - Considers environmental performance and sustainability. | - Not specifically highlighted, but quality and performance imply use of stringent production standards. |
| Certification & Marking | - General focus on quality and performance standards. | - Includes specific certification requirements for government orders. |
| Tolerances & Finish | - Specific dimensional tolerances and shapes available as per project requirements. | - Detailed allowances for machining, decarburization, and camber. |
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