ASME SA**3 T9,ASTM A**3,ASTM A**3 T9, SA**3 T9, Alloy steel pipe,
Alloy tube
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ASTM A**3 T9 is the part of ASTM A**3 Standard Specification for
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater,
Heat-Exchanger Tubes.
ASTM A**3 T9
ASTM A**3 T9 Standard covers seamless ferritic and austenitic
steel boiler, superheater, and heat-exchanger tubes.
Grades containing the letter H in their designation have
requirements different from those of similar grades not
containing the letter H.
These different requirements provide higher creep-rupture
strength than normally achievable in similar grades without these
different requirements. ASTM A**3 T*1 tubes shall be made by the
seamless process and shall be either hot finished or cold
finished, as specified. Grade TP**7HFG shall be cold finished.
Heat treatment shall be done separately and in addition to
heating for hot forming. The ferritic alloy and ferritic
stainless steels shall be reheated. On the other hand, austenitic
stainless steel tubes shall be furnished in the heat-treated
condition. Alternatively, immediately after hot forming, while
the temperature of the tubes is not less than the minimum
solution temperature, tubes may be individually quenched in water
or rapidly cooled by other means. Tension test, hardness test,
flattening test, and flaring test shall be done to each tube.
Also, each tube shall be subjected to the nondestructive electric
test or hydrostatic test.
ASTM A**9 Through A**3
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Other standard specifications include the categories of A**9
seamless carbon-molybdenum alloy-steel boiler and superheater
tubes; A**0 seamless medium-carbon steel boiler and superheater
tubes and A**3 seamless ferritic and austenitic steel boiler,
superheater and heat-exchanger tubes. Piping wall thicknesses
range from 1/2 inch to 5 inches. A**3 grades also have the letter
H or M assigned, which changes the composition and specifications
for that series.
This abstract is a brief summary of the referenced standard. It
is informational only and not an official part of the standard;
the full text of the standard itself must be referred to for its
use and application. ASTM does not give any warranty express or
implied or make any representation that the contents of this
abstract are accurate, complete or up to date.
