ASTM A178 Boiler Tube
ASTM A178 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.North-Pipe 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.
5)Chemical Composition:
|
Element |
Grade A | Grade C |
Grade D |
|
Low carbon steel |
Medium carbon steel |
Manganess steel |
|
|
C% |
0.06-0.18 | 0.35Max | 0.27Max |
|
Mn% |
0.27-0.63 | 0.80Max | 1.00-1.50 |
| P% | 0.035 | 0.035 |
0.030 |
| S% | 0.035 | 0.035 |
0.015 |
| Si% | ….. | ….. |
0.10Min |
6)Mechanical Propertise:
| Grade A | Grade C | Grade D | |
|
Tensile Strength loading Ksi (Mpa) |
=47(325) | 60(415) | 70(485) |
|
Yield Strength Loading Ksi(Mpa) |
=26(180) | 37(255) |
40(275) |
|
Elongation (50mm)% |
=35 | =30 |
=30 |
7)Referenced Documents:
ASTM standards:
A450/A450M Specification for General Requirements for Carbon,Ferritic Alloy,and Austenitic Alloy steel tubes.
E213 Practice for Ultrasonic Examination of Metal pipe and tubing.
E273 Practice for Ultrasonic Examination of Longitudinal Welded Pipe and Tubing.
8)Manufacturing Process:ERW
9)Heat treatment:
After welding,all tubes shall be heat treated at a temperature of 1650°F(900?) or higher and followed by cooling in air or in the cooling chamber of a controlled-atmosphere furnace,Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°F(650?)or higher.
Surface Condition:
Finished tubes shall be free of scale,A slight amount of oxidation will not be considered as scale.
10)Mechanical Tests Required:
Flattenting Test
Flaring test
Flange test
Crush test
Tension test
Reverse Flattening test
Hydrostatic or Nondestructive Electric Test
