ASME SA179 Seamless cold drawn low carbon steel heat exchanger tubes
Standard: ASTM A179 / ASME SA179
Steel grade: Low carbon steel
Material shall conform to the applicable requirements of specification A450/A450M
| Carbon, % | 0.06-0.18 |
| Manganese, % | 0.27-0.63 |
| Phosphorous, max. % | 0.035 |
| Sulfur, max, % | 0.035 |
Process: cold drawn
The tubes cover minimum wall thickness.
Application: tubular heat exchangers, condensers, and other heat transfer apparatus
Dimensional range:
OD: 19.05-76.2mm
Any specific size is to be discussed before offer
The tube be 100% eddy current tested
Ultrasonic test is as option
Straightness ≤1mm/1000mm
Roughness: Ra ≤0.8
Test
- The tubes shall have a hardness test, it is not exceeding 72HRB.
- One flattening test shall be made on specimens from each of two tubes from each lot or fraction thereof.
- One flaring test shall be made on specimens from each of two tubes from each lot or fraction thereof.
- When specified as a substitute for the flaring test, for tubes having a wall thickness (actual mean wall) less than 10% of the outside diameter, one test shall be made on specimens from each of two tubes other than specified above, the flange test shall not be required.
- Rockwell hardness tests shall be made on specimens from two tubes from each lot.(when the final heat treatment is in a continuous furnace, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed)
- Each tube shall be subjected to the hydrostatic test, or, instead of this test, a nondestructive electric test may be used when specified by the clients.
Mechanical properties
| Tensile strength, min, ksi (MPa) | 47 (325) |
| Yield strength, min, ksi (MPa) | 26 (180) |
| Elongation in 50mm, min, % | 35 |
Tubes shall be delivered with square cut ends. The ends are free of excessive burrs.
The tubes are bundled in the waterproof plastic sheet and packed in the wooden cases
The case is most suitable for hanging by forklift.
EN10204-3.1 MTC shall be issued
EN10204-3.2 MTC is as option
