ASTM A179 is a specification for seamless cold-drawn low-carbon steel heat-exchanger tubes. These tubes are commonly used in various industrial applications where heat transfer is required. Here is some information about seamless steel tubes manufactured according to the ASTM A179 specification:

1. Material Composition: ASTM A179 tubes are made from low-carbon steel with a maximum carbon content of 0.06%. The composition also includes manganese (0.27-0.63%) and trace amounts of phosphorus and sulfur.

2. Manufacturing Process: The tubes are produced using a cold-drawn process, which involves pulling the steel through a die to achieve the desired dimensions and properties. This process results in a smooth and uniform tube with precise dimensions.

3. Size Range: ASTM A179 tubes are available in a wide range of sizes, including various outer diameters (OD) and wall thicknesses (WT). The typical OD range is from 3/4 inch (19.05 mm) to 2 inches (50.8 mm), and the WT range is from 0.065 inch (1.65 mm) to 0.125 inch (3.18 mm).

4. Heat Treatment: After the cold-drawing process, the tubes may undergo a final annealing heat treatment. This annealing process helps to improve the mechanical properties and remove any residual stress in the tubes.

5. Mechanical Properties: ASTM A179 tubes have specific requirements for mechanical properties. The minimum tensile strength of the tubes is 325 MPa (47,000 psi), and the minimum yield strength is 180 MPa (26,000 psi). The elongation after fracture should be a minimum of 35%.

6. Surface Finish: The tubes are supplied with a smooth, scale-free finish both on the inside and outside surfaces. This clean surface helps to promote efficient heat transfer and minimize any obstruction or fouling inside the tubes.

7. Application: ASTM A179 seamless steel tubes are widely used in heat exchangers, condensers, and similar applications where heat transfer is crucial. They are commonly employed in industries such as power generation, chemical processing, oil and gas, and HVAC (Heating, Ventilation, and Air Conditioning).

It is important to note that this information is a general overview of ASTM A179 seamless steel tubes. For specific applications or detailed specifications, it is advisable to refer to the official ASTM A179 standard or consult with manufacturers or suppliers who specialize in these tubes.

Seamless Steel Tube ASTM A179 / A179M