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ASTM A179/ ASME SA179is 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:
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.
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
Element
Carbon
Manganese
Phosphorus
Sulfur
Grade
0.06-0.18
0.27-0.63
0.035
0.04
ASTM A179 / ASME SA 179 CS Seamless Tubes Material Mechanical Properties
Yield Strength(MPa)
Tensil Strength(MPa)
Elogation(%)
≥180
≥325
≥35
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.
Straight Tubes: Straight A179 tubes are the most common form used in heat exchangers. They are available in various lengths and can be easily installed in a straight configuration. Straight tubes are typically used in applications where the heat transfer requirements can be met with a simple layout. They are suitable for applications where the fluid flow is relatively straightforward and does not require complex tube routing.
U-Bend Tubes: U-bend A179 tubes are specifically designed for heat exchangers that require a compact and efficient design. These tubes are bent into a U-shape with precise dimensions and tight tolerances. The U-bend configuration allows for a more compact layout, reducing the space required for the heat exchanger. U-bend tubes are typically used in applications where space is limited or where the heat exchanger design demands a specific tube arrangement.
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.
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
