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A178 Boiler Tubing

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. Also, 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 conform 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

Chemical element Grade A
Grade C
Medium-Carbon Steel
Grade D
Carbon-Manganese Steel
Carbon 0.06-0.18 0.35 max 0.27 max
Manganese 0.27-0.63 0.80 max 1.00-1.50
Phosphorus, max 0.035 0.035 0.030
Sulphur, max 0.04 0.035 0.015
Silicon  –   –  0.10 min

ASTM A178 Welded Tubes Yield and Tensile Strength

Grade Tensile Point (Mpa) Yield Point (Mpa) Elongation (%) in 2 in. or 50mm
Grade C 255 415 30
Grade D 275 485 30

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.


Sunny Steel provide a wide range of steel products as Steel pipes, Seamless tube and seamless pipes, Alloy pipes, Pipe fittings, Composite steel pipe used in the industry, construction etc.



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