A178A Boiler Tube

Precision ASTM A178 Welded and Drawn Boiler Tubes for critical engineered applications. Corrosion resistant Grade A tubing for LPG Cylinders, Structural Steel, Boiler, Auto, and wherever heat resistant, high-performing carbon tube is required.

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A178 Boiler Tubing

Offering a wide range of welded and drawn Grade A A178 Boiler Tube. Especially relevant is that our ASME SA178A, ASTM A178B Boiler Tube with characteristics which include low carbon steel, C=0, 18 Max, Eddy Current Tested A178M Superheater Tubes, with Minimum Wall Thickness.

First of all, our A178 boiler tube is super heat resistant. Therefore, it’s used in many applications where boiler tubes, boiler flues, superheater, and safe ends are being employed. In addition, we stock several grades of boiler tube which include Grade A (low-carbon), C (medium-carbon steel), and/or D (carbon-manganese steel).

All our tubing has been heat-treated after welding then cooled. And the steel used in its manufacture conforms to the stated composition of carbon, manganese, phosphorus, sulfur, and silicon. Furthermore, grades C and D conforms to stated tensile requirements; including tensile strength, yield strength, and elongation. As a result of A178 requirements, the finished tubing is subjected to Nondestructive and Hydrostatic testing such as flattening, tension, flange, and reverse flattening.

ASTM A178 electric resistance welded tubing is used in many industries and applications:

  • Boilers
  • Heat Exchangers
  • Power Plants, i.e Gas, Oil, Coal, Thermal, and Nuclear
  • Condensers
  • Marine Shipping
  • Refineries
  • Paper Pulp
  • Petrochemical
  • Pressure Vessels
  • General Engineering

ASTM A178 Welded Tubes Chemical Composition

Grade A

Grade C
Medium-Carbon Steel

Grade D
Carbon-Manganese Steel



0.35 max

0.27 max



0.80 max


Phosphorus, max




Sulphur, max





0.10 min

ASTM A178 Welded Tubes Yield and Tensile Strength


Tensile Point (Mpa)

Yield Point (Mpa)

Elongation (%) in 2 in. or 50mm

Grade C




Grade D




Keywords for A178 Boiler Tube

  • Boiler Tubes
  • Boilers And Pressure Vessel Tubes
  • Carbon Steel
  • Carbon-Manganese Steel
  • Electric Resistance Welding
  • Resistance Welding
  • Superheater Tubes
  • Superheaters
  • Welded Pipes And Tubes
  • Welded Steel Tubes

In conclusion, if further information is needed please phone us directly at (845) 679-3385. You can also refer to ASTM A178 / A178M-02(2012), Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes, ASTM International.

Additional information


20' – 24'

Contact Karay Metals, Inc.

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