ASTM A179 / ASME SA179 Carbon Steel Seamless Tube Cold-drawn Heat Exchanger Tube

ASTM A179/ ASME SA179 is a low-carbon steel grade. Tubes are manufactured by cold drawn process, which results in improved strength and hardness due to work hardening. The surface finish is smoother compared to hot-rolled products, reducing the need for further processing or coating. The tight tolerances and smooth finish contribute to better resistance against corrosion, making them suitable for harsh environments. Available in various sizes and shapes like straight and U bend, they can be customized to meet specific application requirements.

Comparison with Other Materials:

1. Versus Stainless Steels (like A312 or A213):

   • Cost-Effectiveness: A179 is generally more affordable than stainless steel grades, making it an attractive option for budget-sensitive projects without compromising too much on performance.
   • Strength: While stainless steels typically have better corrosion resistance and higher temperatures tolerance, A179 provides adequate strength for many heat exchanger applications.

2. Versus Other Carbon Steels:

   • Manufacturability: A179 is designed specifically for seamless manufacturing, allowing it to be produced with precise dimensions, which is crucial for efficient heat transfer.
   • Versatility: It can be used in various environments, and its thermal conductivity is adequate for heat exchanger applications.

ASTM A179 / ASME SA 179 CS Seamless Tubes Chemical Composition

ASTM A179 / ASME SA 179 CS Seamless Tubes Material Mechanical Properties

Properties:

• Strength: Cold drawn A179 tubes generally exhibit higher mechanical strength compared to their hot-rolled counterparts.
• Dimensional Accuracy: The cold drawn process allows for tighter tolerances, producing a more precise product.
• Surface Finish: They have a better surface finish, leading to improved aesthetic quality and corrosion resistance.

A179 tubes can be used in heat exchangers in two main forms: straight tubes and U-bend tubes.

Manufacturing Process:

• Cold Drawn: The process involves drawing the tube through a die to reduce its diameter and increase its length. This method enhances its mechanical properties, producing a tighter tolerance, a finer surface finish, and improved strength.

Applications