ASTM A178 Standard covers minimum-wall-thickness, electric-resistance-welded tubes made of carbon steel and carbon-manganese steel intended for use as boiler tubes, boiler flues, superheater flues, and safe ends.
SA178 tubing sizes and thicknesses usually furnished to this specification are 1⁄2 to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.360 in. [0.9 to 9.1 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.
Applications:
ASTM A178 tubes are a kind of frequently-used tubes in our life, they are mainly used in manufacturing heating pipelines, containers, coal-saving devices, superheaters, arch superheated tube, airway tube etc.
Standard: ASTM A178, ASME SA178
Grade: Grade A, Grade C, Grade D
Technique: Electric-Resistance-Welded
Delivery Condition: Annealed, Normalized, Tempered, Heat Treatment, BK, BKS,
BKW, NBK, GBK
Section Shape: Round
Surface Treatment: Varnish
Size: (mm)
OD: 12.7mm to 127mm
Wall thickness: 1.5mm to 6.0mm
Length: 6m-25m
Ends: Plain ends or bevel ends
| Element | Grade A, | Grade C, | Grade D |
| Low-Carbon Steel | Medium-Carbon Steel | Carbon-Manganese Steel | |
| Carbon | 0.06-0.18 | 0.35max | 0.27max |
| Manganese | 0.27-0.63 | 0.08max | 1.00-1.50 |
| Phosphorus, max | 0.035 | 0.035 | 0.03 |
| Sulfur, max | 0.035 | 0.035 | 0.015 |
| Silicon | … | … | 0.01 min |
| Grade A | Grade C | Grade D | |
| Tensile strength, min, ksi [MPa] | 47[325] | 60[415] | 70[485] |
| Yield strength, min, ksi [MPa] | 26[180] | 37[255] | 40[275] |
| Elongation in 2 in. or 50mm, min, % | 35 | 30 | 30 |
| For longitudinal strip tests a deduction for | 1.50A | 1.50A | 1.50A |
| Each1⁄32-in[0.8mm] decrease in wall thickness below 5⁄16in. [8mm] | |||
| From the basic minimum elongation of the following percentage points shall be made |
| Outside Diameter tolerance | Wall thickness tolerance | ||
| OD < 50 | ±0.05mm | S < 4mm | ±12.5% |
| OD > 50 | ±1% | 4–20mm | +15/-12.5% |
| S≥20mm | ±12.5% | ||
ASTM 178 for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes
ASTM A178 Boiler Tubes are known for their resistance to corrosion and tolerance for withstanding temperature variations.shengtian pipe-fitting group offering ASTM A 178 grade A &C&D Boiler Tubes that used in varied industrial applications.
1)Materials
GradeA ,Grade C,Grade D Bolier steel tube.
2)Size
OD 1/2in-5in(12.7-127mm)
3)Wall thickness
0.035in-0.360in(0.9-9.1mm)
4)Different name
Condenser steel tube,heat-exchanger tube,low carbon steel pipe,Resistance welded steel tube ,Bolier flues,Spoerheater flues and safe ends,ERW carbon steel pipes.
Shengtian Group Astm A178 / Sa178 Boiler Tube Suppliers, Astm A178 Grade A, Grade C, Grade D Pipes, Tubes Supplier, Astm A178 Electric-Resistance-Welded Carbon Steel And Carbon-Manganese Steel Boiler And Superheater Tubes Manufacturer.
