ASTM A179 Seamless Steel Tube: Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
Introduction
ASTM A179 is a standard specification that outlines the requirements for seamless cold-drawn low-carbon steel tubes used in heat exchangers and condensers. These tubes are designed to withstand high pressures and temperatures, making them ideal for various industrial applications.
Material
The ASTM A179 specification primarily covers low-carbon steel, which is known for its excellent weldability and formability. The material is typically produced in a seamless form, ensuring uniformity and strength throughout the tube.
Specification
The ASTM A179 specification includes various requirements regarding the manufacturing process, dimensions, and tolerances of the tubes. The tubes must be cold drawn and are usually supplied in a heat-treated condition to enhance their mechanical properties.
Chemical Composition
The chemical composition of ASTM A179 tubes is critical for ensuring their performance and durability. Below is a table summarizing the typical chemical composition of low-carbon steel used in ASTM A179 tubes.
| Element | Composition (%) |
| Carbon (C) | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 - 0.63 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.025 |
| Silicon (Si) | ≤ 0.10 |
| Iron (Fe) | Balance |
Mechanical Properties
The mechanical properties of ASTM A179 tubes are essential for their application in high-pressure environments. The following table presents the typical mechanical properties of these tubes.
| Property | Value |
| Yield Strength (min) | 205 MPa (30,000 psi) |
| Tensile Strength (min) | 310 MPa (45,000 psi) |
| Elongation (min) | 30% |
| Hardness (Brinell) | ≤ 95 HB |
Application
ASTM A179 seamless steel tubes are widely used in various applications, particularly in the manufacturing of heat exchangers and condensers. Their ability to withstand high pressures and temperatures makes them suitable for:
- Power generation plants
- Chemical processing industries
- Oil and gas industries
- HVAC systems
- Refrigeration systems
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