ASTM A178 Boiler and Superheater Tube
Standards:ASTM A178/ASME SA-178
Mill Plant: VALIN STEEL, BAO STEEL
Outside Diameter: 12.7mm to 127mm
Wall Thickness: 1.2-9.1mm
Length: 6-12m
Type: Round Tube
ASTM A178 is the standard specification for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes. The steel shall be of Grades A (low-carbon steel), C (medium-carbon steel), or D (carbon-manganese steel). At WIHO metals, The ASTM A178 ERW welded tubes we supplied are mainly Grade A and grade C shall be used in manufacturing heating pipelines, containers, coal-saving devices, superheaters, arch superheated tubes, airway tubes etc.
ASTM A178 Tube Equivalent Material
| ISO | JIS G3455 | ASTM | DIN | GB |
| C38D | STS42 | A178 Gr.C | St 45.4/1.0309 | 20G |
ASTM A178 Chemical Composition
| Grades | C | Mn | P | S | Si |
| Grade A | 0.06-0.18 | 0.27-0.63 | 0.035 | 0.04 | / |
| Grade C | 0.35 max | 0.80 max | 0.035 | 0.035 | / |
| Grade D | 0.27 max | 1.00-1.50 | 0.03 | 0.015 | 0.01 min |
ASTM A178 Mechanical Property
| Grades | Tensile strength, min, ksi [MPa] | Yield strength, min, ksi [MPa] | Elongation in 2 in. or 50mm, min, % |
| Grade A | 47[325] | 26[180] | 35 |
| Grade C | 60[415] | 37[255] | 30 |
| Grade D | 70[485] | 40[275] | 30 |
WIHO metals supply and stock a large inventory of ASTM A178/ASME SA178(STB33/St35.8) ERW tube used for boiler, superheater, condenser, reheaters, and safe ends. We supply and stock ASTM A178 Grade A, Grade C steel tubes from china’s leading steel mills and we also offer steel additional services like cutting, welding, bending, machining, pre-coating and beveling. For more information on our extensive steel alloys inventory, please contact us or fill in the form below.
