What is ASTM A178 boiler tube?

SA178A / ASTM A178 Grade A SA178 A is an ERW (electric resistance welded) low carbon steel boiler tube used in super heaters, water wall panels, heat exchangers, condensers, marine application, refineries, paper pulping, petrochemical applications, pressure vessels, and general engineering applications.

ERW tubes with a minimal wall width are covered by ASTM A178 standard. Boiler tubing, boiler ventilation systems, superheater vents, and safety terminals all employ ASTM A178 Boiler Tube, which is made of carbon steel & carbon-manganese alloy steel. Heat treatment & welding upon cooling are required steps in the production process.
The ASME SA178 Tubing sizes and wall thicknesses supplied following this specification range from 0.035 to 0.320 inches (0.9 to 9.1 millimeters), inclusive, in minimal wall width. Other-sized pipes are acceptable as long as they meet all other specifications of this specification. ASME SA178 Carbon Steel Tubes with an internal diameter and thickness of less than 1/8 inches [3.2 mm] or 0.015 inches. [0.4 mm] is example from the specifications for mechanical characteristics.

Maximum Hardness: 77 Max. Rockwell B (HRB)

Tensile Strength: ksi: 47 MPa: 325

Yield: ksi: 26 MPa: 180

What are grades of ASTM A178 boiler tube

ASTM A178 boiler tube is offered in three grades: SA 178 Gr A Boiler Tube, SA 178 Gr C Boiler Tube, & SA 178 Grade D Boiler Tube. Low-carbon steel alloy is used to produce the SA 178 Gr A tubes. Despite being flexible, this SA178a Pipe Material with low carbon content is machinable, weldable, and noted for its exceptional ductility and hardness capabilities.

Regarding mechanical qualities, both grade D boiler pipes & SA178 gr C boiler tubes of SA178D boiler tubing must meet the specifications. mechanical properties including such tensile properties, yield strength, and extension properties are what these characteristics are.

What are the physical properties of ASME SA178 carbon steel tubes?

The physical characteristics of these tubes are well recognized. Tensile strength for SA 178 carbon manganese ERW tubing ranges from 47 ksi (325 MPa) to 70 ksi (485 MPa). The yield strength of ASME SA178 Welded Steel Boiler Tube is between 26 ksi (180 MPa) and 40 ksi (275 MPa).
These pipes have elongation percentages between 30 and 35%. These characteristics vary for various SA 178 tube grades. The main features that have elevated it to the top spot in the industry are superior electric resistance and strong corrosion protection. These pipes range from 77 to 79 HRB in hardness.

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