SEAMLESS MEDIUM-CARBON STEEL BOILER AND SUPERHEATER TUBES ASTM A210
ASTM A210 —American Society for Testing and Materials Standards
ASME SA210 — AmericanSociety of Mechanical Engineers standards
For boiler pipesand boiler flue pipe, including security side, the dome and the support tubeand superheater tubes minimum wall thickness of seamless carbon steel pipes.
The mainproduction steel grades:
A-1, C, etc. arenegotiated, but also supply other grades of steel.
|Standard||Grade||Tensile strength (MPa)||Yield strength (MPa)||Elongation (%)|
Hot-finished tubes need not be heat treated. Cold-finished tubes shall be given a subcritical anneal, a full anneal, or a normalizing heat treatment after the final cold-finishing process.
The tubes shall have a hardness not exceeding the following: 79 HRB or 143 HRB for Grade A-1,89 HRB or 179 HRB for Grade C.
Hydrostatic or Nondestructive Electric Test —Each tube shall be subjected to the hydrostatic, or,
instead of this test, a nondestructive electric test may be used when specified by the purchaser
In addition to the marking prescribed in Specifi-cation A 450/A 450M, the marking shall indicate
whether the tube is hot-finished or cold-finished.