The ASTM A**9 specification covers
nominal-wall-thickness welded tubes and heavily cold worked welded
tubes made from the austenitic steels. More specifically, the ASTM
A**9 specification is intended for uses such
as Boiler Superheater heat exchanger condenser tubes be furnished in the heat-treated condition in
accordance with the required solution temperature and quenching
method. conform to the prescribed tensile and hardness properties
such as tensile strength, yield strength, elongation, and Rockwell
hardness number. undergo mechanical tests such as tension
test, flattening test, reverse-bend test, hardness test, and
hydrostatic or nondestructive test.
